Mihailović, Jelena

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Trypsin as a Proteomic Probe for Assessment of Food Protein Digestibility in Relation to Chemical and Post-translational Modifications

Smiljanić, Katarina; Mihailović, Jelena; Prodić, Ivana; Đukić, Teodora; Vasović, Tamara; Jovanović, Vesna B.; Ćirković-Veličković, Tanja

(New York : Nova Science Publisher, 2020)

TY  - CHAP
AU  - Smiljanić, Katarina
AU  - Mihailović, Jelena
AU  - Prodić, Ivana
AU  - Đukić, Teodora
AU  - Vasović, Tamara
AU  - Jovanović, Vesna B.
AU  - Ćirković-Veličković, Tanja
PY  - 2020
UR  - http://intor.torlakinstitut.com/handle/123456789/764
AB  - Post-translational modifications (PTMs) occur in many forms and shapes, widely influencing protein behavior. High-resolution tandem mass spectrometry (HRMS/MS), coupled with dedicated engines for the identification of unspecified PTMs, is a powerful method for their mapping. A majority of proteomic experiments utilize trypsin for digestion, which cleaves the C-terminal peptide bonds of arginine (Arg) and lysine (Lys) amino acids with high catalytic efficiency and selectivity, unless they are followed with proline. At the same time, Arg and Lys residues are frequently modified during food processing by heat and non-thermal treatments, causing oxidation, carbamylation, and various forms of side chain carbonylation, including the other common PTMs (methylation, acetylation, etc.). Consequently, we explored the possibility to re-assess already generated proteomic data (food protein/allergen tryptic peptides) with respect to the possible modulation of the tryptic intestinal digestion pattern caused by PTMs incorporated at Arg and Lys residues. However, most of the proteomic bottom-up experiments are run with porcine trypsin that has been reductively methylated to increase its stability and minimize autoproteolytic effects. Therefore, in this chapter, the utility of the aforementioned idea was explored, by reviewing the differences in structure, affinity, specificity, and catalytic efficiency of trypsin, primarily from porcine, bovine and human species. Porcine trypsin either from pancreas or in recombinant form showed superior performance compared to human and bovine tryptic counterparts. In addition, set of software tools for identification and analyses of PTMs was reviewed with the aim to isolate those capable of in-depth PTMs profiling and their simultaneous relative quantification, such as PEAKS PTM (PEAKS Studio, Bioinformatics Solution Inc., Ontario Canada). Based on our preliminary experimental results, conclusion is that the proposed idea is plausible, because if potential hindrance effects caused by PTMs are observed with porcine trypsin, then they can be just augmented within human intestinal digestion, with respect to inferior performance of human trypsin.
PB  - New York : Nova Science Publisher
T2  - A Closer Look at Proteolysis: Biochemistry and Molecular Biology in the Post Genomic Era
T1  - Trypsin as a Proteomic Probe for Assessment of Food Protein Digestibility in Relation to Chemical and Post-translational Modifications
SP  - 158
VL  - 4
UR  - https://hdl.handle.net/21.15107/rcub_intor_764
ER  - 
@inbook{
author = "Smiljanić, Katarina and Mihailović, Jelena and Prodić, Ivana and Đukić, Teodora and Vasović, Tamara and Jovanović, Vesna B. and Ćirković-Veličković, Tanja",
year = "2020",
abstract = "Post-translational modifications (PTMs) occur in many forms and shapes, widely influencing protein behavior. High-resolution tandem mass spectrometry (HRMS/MS), coupled with dedicated engines for the identification of unspecified PTMs, is a powerful method for their mapping. A majority of proteomic experiments utilize trypsin for digestion, which cleaves the C-terminal peptide bonds of arginine (Arg) and lysine (Lys) amino acids with high catalytic efficiency and selectivity, unless they are followed with proline. At the same time, Arg and Lys residues are frequently modified during food processing by heat and non-thermal treatments, causing oxidation, carbamylation, and various forms of side chain carbonylation, including the other common PTMs (methylation, acetylation, etc.). Consequently, we explored the possibility to re-assess already generated proteomic data (food protein/allergen tryptic peptides) with respect to the possible modulation of the tryptic intestinal digestion pattern caused by PTMs incorporated at Arg and Lys residues. However, most of the proteomic bottom-up experiments are run with porcine trypsin that has been reductively methylated to increase its stability and minimize autoproteolytic effects. Therefore, in this chapter, the utility of the aforementioned idea was explored, by reviewing the differences in structure, affinity, specificity, and catalytic efficiency of trypsin, primarily from porcine, bovine and human species. Porcine trypsin either from pancreas or in recombinant form showed superior performance compared to human and bovine tryptic counterparts. In addition, set of software tools for identification and analyses of PTMs was reviewed with the aim to isolate those capable of in-depth PTMs profiling and their simultaneous relative quantification, such as PEAKS PTM (PEAKS Studio, Bioinformatics Solution Inc., Ontario Canada). Based on our preliminary experimental results, conclusion is that the proposed idea is plausible, because if potential hindrance effects caused by PTMs are observed with porcine trypsin, then they can be just augmented within human intestinal digestion, with respect to inferior performance of human trypsin.",
publisher = "New York : Nova Science Publisher",
journal = "A Closer Look at Proteolysis: Biochemistry and Molecular Biology in the Post Genomic Era",
booktitle = "Trypsin as a Proteomic Probe for Assessment of Food Protein Digestibility in Relation to Chemical and Post-translational Modifications",
pages = "158",
volume = "4",
url = "https://hdl.handle.net/21.15107/rcub_intor_764"
}
Smiljanić, K., Mihailović, J., Prodić, I., Đukić, T., Vasović, T., Jovanović, V. B.,& Ćirković-Veličković, T.. (2020). Trypsin as a Proteomic Probe for Assessment of Food Protein Digestibility in Relation to Chemical and Post-translational Modifications. in A Closer Look at Proteolysis: Biochemistry and Molecular Biology in the Post Genomic Era
New York : Nova Science Publisher., 4, 158.
https://hdl.handle.net/21.15107/rcub_intor_764
Smiljanić K, Mihailović J, Prodić I, Đukić T, Vasović T, Jovanović VB, Ćirković-Veličković T. Trypsin as a Proteomic Probe for Assessment of Food Protein Digestibility in Relation to Chemical and Post-translational Modifications. in A Closer Look at Proteolysis: Biochemistry and Molecular Biology in the Post Genomic Era. 2020;4:158.
https://hdl.handle.net/21.15107/rcub_intor_764 .
Smiljanić, Katarina, Mihailović, Jelena, Prodić, Ivana, Đukić, Teodora, Vasović, Tamara, Jovanović, Vesna B., Ćirković-Veličković, Tanja, "Trypsin as a Proteomic Probe for Assessment of Food Protein Digestibility in Relation to Chemical and Post-translational Modifications" in A Closer Look at Proteolysis: Biochemistry and Molecular Biology in the Post Genomic Era, 4 (2020):158,
https://hdl.handle.net/21.15107/rcub_intor_764 .

Supplementary information for the article: Radosavljević, J.; Apostolović, D.; Mihailović, J.; Atanasković-Marković, M.; Burazer, L.; van Hage, M.; Ćirković Veličković, T. Digestomics of Cow’s Milk: Short Digestion-Resistant Peptides of Casein Form Functional Complexes by Aggregation. Foods 2020, 9 (11), 1576. https://doi.org/10.3390/foods9111576.

Radosavljević, Jelena; Apostolović, Danijela; Mihailović, Jelena; Atanasković-Marković, Marina; Burazer, Lidija; van Hage, Marianne; Ćirković-Veličković, Tanja

(MDPI, 2020)

TY  - DATA
AU  - Radosavljević, Jelena
AU  - Apostolović, Danijela
AU  - Mihailović, Jelena
AU  - Atanasković-Marković, Marina
AU  - Burazer, Lidija
AU  - van Hage, Marianne
AU  - Ćirković-Veličković, Tanja
PY  - 2020
UR  - http://intor.torlakinstitut.com/handle/123456789/645
AB  - Figure S1-S3:  Figure S1: Digestion of BLG at pH 1.2, 2.5 and 4.0; Figure S2: Digestion of ALA at pH 1.2, 2.5 and 4.0;  Figure S3: MALDI spectra of peptides used in the study Table S1. IgE levels of patients used in the study determined by ImmunoCAP Methods: 1.1 Detection of ALA and BLG by immunoblot; 1.2 Mass spectrometry analysis; 1.3 Size-exclusion chromatography;  1.4 IgG4-binding properties of peptides obtained by digestion; 1.5 Digestion of purified ALA and BLG at different pH; 1.6 MALDI-TOF MS.
PB  - MDPI
T2  - Foods
T1  - Supplementary information for the article: Radosavljević, J.; Apostolović, D.; Mihailović, J.; Atanasković-Marković, M.;  Burazer, L.; van Hage, M.; Ćirković Veličković, T. Digestomics of Cow’s Milk: Short Digestion-Resistant Peptides of Casein Form  Functional Complexes by Aggregation. Foods 2020, 9 (11), 1576. https://doi.org/10.3390/foods9111576.
IS  - 11
VL  - 9
UR  - https://hdl.handle.net/21.15107/rcub_intor_645
ER  - 
@misc{
author = "Radosavljević, Jelena and Apostolović, Danijela and Mihailović, Jelena and Atanasković-Marković, Marina and Burazer, Lidija and van Hage, Marianne and Ćirković-Veličković, Tanja",
year = "2020",
abstract = "Figure S1-S3:  Figure S1: Digestion of BLG at pH 1.2, 2.5 and 4.0; Figure S2: Digestion of ALA at pH 1.2, 2.5 and 4.0;  Figure S3: MALDI spectra of peptides used in the study Table S1. IgE levels of patients used in the study determined by ImmunoCAP Methods: 1.1 Detection of ALA and BLG by immunoblot; 1.2 Mass spectrometry analysis; 1.3 Size-exclusion chromatography;  1.4 IgG4-binding properties of peptides obtained by digestion; 1.5 Digestion of purified ALA and BLG at different pH; 1.6 MALDI-TOF MS.",
publisher = "MDPI",
journal = "Foods",
title = "Supplementary information for the article: Radosavljević, J.; Apostolović, D.; Mihailović, J.; Atanasković-Marković, M.;  Burazer, L.; van Hage, M.; Ćirković Veličković, T. Digestomics of Cow’s Milk: Short Digestion-Resistant Peptides of Casein Form  Functional Complexes by Aggregation. Foods 2020, 9 (11), 1576. https://doi.org/10.3390/foods9111576.",
number = "11",
volume = "9",
url = "https://hdl.handle.net/21.15107/rcub_intor_645"
}
Radosavljević, J., Apostolović, D., Mihailović, J., Atanasković-Marković, M., Burazer, L., van Hage, M.,& Ćirković-Veličković, T.. (2020). Supplementary information for the article: Radosavljević, J.; Apostolović, D.; Mihailović, J.; Atanasković-Marković, M.;  Burazer, L.; van Hage, M.; Ćirković Veličković, T. Digestomics of Cow’s Milk: Short Digestion-Resistant Peptides of Casein Form  Functional Complexes by Aggregation. Foods 2020, 9 (11), 1576. https://doi.org/10.3390/foods9111576.. in Foods
MDPI., 9(11).
https://hdl.handle.net/21.15107/rcub_intor_645
Radosavljević J, Apostolović D, Mihailović J, Atanasković-Marković M, Burazer L, van Hage M, Ćirković-Veličković T. Supplementary information for the article: Radosavljević, J.; Apostolović, D.; Mihailović, J.; Atanasković-Marković, M.;  Burazer, L.; van Hage, M.; Ćirković Veličković, T. Digestomics of Cow’s Milk: Short Digestion-Resistant Peptides of Casein Form  Functional Complexes by Aggregation. Foods 2020, 9 (11), 1576. https://doi.org/10.3390/foods9111576.. in Foods. 2020;9(11).
https://hdl.handle.net/21.15107/rcub_intor_645 .
Radosavljević, Jelena, Apostolović, Danijela, Mihailović, Jelena, Atanasković-Marković, Marina, Burazer, Lidija, van Hage, Marianne, Ćirković-Veličković, Tanja, "Supplementary information for the article: Radosavljević, J.; Apostolović, D.; Mihailović, J.; Atanasković-Marković, M.;  Burazer, L.; van Hage, M.; Ćirković Veličković, T. Digestomics of Cow’s Milk: Short Digestion-Resistant Peptides of Casein Form  Functional Complexes by Aggregation. Foods 2020, 9 (11), 1576. https://doi.org/10.3390/foods9111576." in Foods, 9, no. 11 (2020),
https://hdl.handle.net/21.15107/rcub_intor_645 .

Digestomics of Cow's Milk: Short Digestion-Resistant Peptides of Casein Form Functional Complexes by Aggregation

Radosavljević, Jelena; Apostolović, Danijela; Mihailović, Jelena; Atanasković-Marković, Marina; Burazer, Lidija; van Hage, Marianne; Ćirković-Veličković, Tanja

(MDPI, Basel, 2020)

TY  - JOUR
AU  - Radosavljević, Jelena
AU  - Apostolović, Danijela
AU  - Mihailović, Jelena
AU  - Atanasković-Marković, Marina
AU  - Burazer, Lidija
AU  - van Hage, Marianne
AU  - Ćirković-Veličković, Tanja
PY  - 2020
UR  - http://intor.torlakinstitut.com/handle/123456789/547
AB  - The aim of this study was to identify short digestion-resistant peptides (SDRPs) released by pepsin digestion of the whole cow's milk and examine their IgE reactivity and allergenicity. Raw milk was subjected to simulated gastric digestion. SDRPs were fractionated from the digests and identified by MS. Milk SDRPs were evaluated for aggregability, propensity to compete for IgE binding with individual milk allergens, and ability to bind IgG4 from allergic and milk-tolerant individuals. The majority of milk SDRPs originated from caseins (97% of peptides) and overlapped with the known IgE epitopes of cow's milk allergens. SDRPs competed with milk proteins for binding to human IgE and readily formed aggregates. The average peptide length was 10.6 +/- 3.5 amino acids. The ability to provoke allergenic in vivo responses was confirmed by skin-prick testing (SPT) in five milk-allergic subjects. This was attributed to the peptide ability to aggregate into non-covalent complexes. SDRPs are able to induce response in SPT, but only in 50% of the sera SDRPs were able to inhibit IgG4 binding to caseins. Hence, SDRPs corresponding to the mainly continuous epitopes of milk proteins induce allergenic in vivo responses in milk-allergic subjects due to aggregation.
PB  - MDPI, Basel
T2  - Foods
T1  - Digestomics of Cow's Milk: Short Digestion-Resistant Peptides of Casein Form Functional Complexes by Aggregation
IS  - 11
VL  - 9
DO  - 10.3390/foods9111576
ER  - 
@article{
author = "Radosavljević, Jelena and Apostolović, Danijela and Mihailović, Jelena and Atanasković-Marković, Marina and Burazer, Lidija and van Hage, Marianne and Ćirković-Veličković, Tanja",
year = "2020",
abstract = "The aim of this study was to identify short digestion-resistant peptides (SDRPs) released by pepsin digestion of the whole cow's milk and examine their IgE reactivity and allergenicity. Raw milk was subjected to simulated gastric digestion. SDRPs were fractionated from the digests and identified by MS. Milk SDRPs were evaluated for aggregability, propensity to compete for IgE binding with individual milk allergens, and ability to bind IgG4 from allergic and milk-tolerant individuals. The majority of milk SDRPs originated from caseins (97% of peptides) and overlapped with the known IgE epitopes of cow's milk allergens. SDRPs competed with milk proteins for binding to human IgE and readily formed aggregates. The average peptide length was 10.6 +/- 3.5 amino acids. The ability to provoke allergenic in vivo responses was confirmed by skin-prick testing (SPT) in five milk-allergic subjects. This was attributed to the peptide ability to aggregate into non-covalent complexes. SDRPs are able to induce response in SPT, but only in 50% of the sera SDRPs were able to inhibit IgG4 binding to caseins. Hence, SDRPs corresponding to the mainly continuous epitopes of milk proteins induce allergenic in vivo responses in milk-allergic subjects due to aggregation.",
publisher = "MDPI, Basel",
journal = "Foods",
title = "Digestomics of Cow's Milk: Short Digestion-Resistant Peptides of Casein Form Functional Complexes by Aggregation",
number = "11",
volume = "9",
doi = "10.3390/foods9111576"
}
Radosavljević, J., Apostolović, D., Mihailović, J., Atanasković-Marković, M., Burazer, L., van Hage, M.,& Ćirković-Veličković, T.. (2020). Digestomics of Cow's Milk: Short Digestion-Resistant Peptides of Casein Form Functional Complexes by Aggregation. in Foods
MDPI, Basel., 9(11).
https://doi.org/10.3390/foods9111576
Radosavljević J, Apostolović D, Mihailović J, Atanasković-Marković M, Burazer L, van Hage M, Ćirković-Veličković T. Digestomics of Cow's Milk: Short Digestion-Resistant Peptides of Casein Form Functional Complexes by Aggregation. in Foods. 2020;9(11).
doi:10.3390/foods9111576 .
Radosavljević, Jelena, Apostolović, Danijela, Mihailović, Jelena, Atanasković-Marković, Marina, Burazer, Lidija, van Hage, Marianne, Ćirković-Veličković, Tanja, "Digestomics of Cow's Milk: Short Digestion-Resistant Peptides of Casein Form Functional Complexes by Aggregation" in Foods, 9, no. 11 (2020),
https://doi.org/10.3390/foods9111576 . .
10
4

Digestomics of raw and roasted hazelnut according to Infogest protocol and characterization of gastric-phase products

Prodić, Ivana; Smiljanić, Katarina; Mihailović, Jelena; Hoffmann-Sommergruber, Karin; Ćirković-Veličković, Tanja

(Univerzitet u Beogradu - Hemijski fakultet, 2019)

TY  - CONF
AU  - Prodić, Ivana
AU  - Smiljanić, Katarina
AU  - Mihailović, Jelena
AU  - Hoffmann-Sommergruber, Karin
AU  - Ćirković-Veličković, Tanja
PY  - 2019
UR  - http://intor.torlakinstitut.com/handle/123456789/775
AB  - Brief introduction: Stability to gastric digestion represents a very important parameter of food protein allergenicity. Usually digestion experiments are carried out on purified proteins or protein extracts; however, use of solid food is far closer to the in vivo situation, taking into account food protein interactions with other food components, such as polyphenols and lipids.Objective: The aim of this study was to investigate and compare digestion stability and allergenicity of large and small peptides released after pepsin digestion of whole raw and roasted hazelnut kernels under standardized and physiologically relevant in vitro conditions.Methodology: In vitro simulated oral and gastric phase digestion was carried out with ground raw and roasted hazelnut kernels. Digested proteins were extracted from the mixture and analyzed by SDS-PAGE, 2D-PAGE, and compared with Image Master 2D Platinum 7.0. Western blot probed with allergic patients’ sera and specific antibodies for Cor a 8.Main findings: Several important hazelnut seed storage digestion resistant proteins and peptides have been identified and characterized. Most abundant hazelnut allergens were resolved on a 2DE map, for instance acidic and basic chains of Cor a 9, and Cor a11. Digestion-resistant peptides of Cor a 11 and Cor a 9 were able to bind IgE. Lipid transfer protein (Cor a 8) was highly resistant to gastric proteolysis. Conclusion: To conclude, roasted hazelnut is more prone to gastric digestion than raw, and cause milder IgE response in patients. Gastric phase digestion of raw and roasted hazelnut kernels results in partial extraction and digestion of Cor a 11 and Cor a 9 into digestion- resistant peptides with preserved IgE-binding epitopes. These results demonstrate substantial resistance of raw and roasted hazelnut allergens to gastric digestion since they remained mostly intact after 2 h of gastric (pepsin) digestion and retained their allergenicity.
PB  - Univerzitet u Beogradu - Hemijski fakultet
C3  - Abstract Book of the 1st FoodEnTwin Workshop “Food and Environmental -Omics”, Belgrade, June 20-21, 2019
T1  - Digestomics of raw and roasted hazelnut according to Infogest protocol and characterization of gastric-phase products
EP  - 25
SP  - 25
UR  - https://hdl.handle.net/21.15107/rcub_intor_775
ER  - 
@conference{
author = "Prodić, Ivana and Smiljanić, Katarina and Mihailović, Jelena and Hoffmann-Sommergruber, Karin and Ćirković-Veličković, Tanja",
year = "2019",
abstract = "Brief introduction: Stability to gastric digestion represents a very important parameter of food protein allergenicity. Usually digestion experiments are carried out on purified proteins or protein extracts; however, use of solid food is far closer to the in vivo situation, taking into account food protein interactions with other food components, such as polyphenols and lipids.Objective: The aim of this study was to investigate and compare digestion stability and allergenicity of large and small peptides released after pepsin digestion of whole raw and roasted hazelnut kernels under standardized and physiologically relevant in vitro conditions.Methodology: In vitro simulated oral and gastric phase digestion was carried out with ground raw and roasted hazelnut kernels. Digested proteins were extracted from the mixture and analyzed by SDS-PAGE, 2D-PAGE, and compared with Image Master 2D Platinum 7.0. Western blot probed with allergic patients’ sera and specific antibodies for Cor a 8.Main findings: Several important hazelnut seed storage digestion resistant proteins and peptides have been identified and characterized. Most abundant hazelnut allergens were resolved on a 2DE map, for instance acidic and basic chains of Cor a 9, and Cor a11. Digestion-resistant peptides of Cor a 11 and Cor a 9 were able to bind IgE. Lipid transfer protein (Cor a 8) was highly resistant to gastric proteolysis. Conclusion: To conclude, roasted hazelnut is more prone to gastric digestion than raw, and cause milder IgE response in patients. Gastric phase digestion of raw and roasted hazelnut kernels results in partial extraction and digestion of Cor a 11 and Cor a 9 into digestion- resistant peptides with preserved IgE-binding epitopes. These results demonstrate substantial resistance of raw and roasted hazelnut allergens to gastric digestion since they remained mostly intact after 2 h of gastric (pepsin) digestion and retained their allergenicity.",
publisher = "Univerzitet u Beogradu - Hemijski fakultet",
journal = "Abstract Book of the 1st FoodEnTwin Workshop “Food and Environmental -Omics”, Belgrade, June 20-21, 2019",
title = "Digestomics of raw and roasted hazelnut according to Infogest protocol and characterization of gastric-phase products",
pages = "25-25",
url = "https://hdl.handle.net/21.15107/rcub_intor_775"
}
Prodić, I., Smiljanić, K., Mihailović, J., Hoffmann-Sommergruber, K.,& Ćirković-Veličković, T.. (2019). Digestomics of raw and roasted hazelnut according to Infogest protocol and characterization of gastric-phase products. in Abstract Book of the 1st FoodEnTwin Workshop “Food and Environmental -Omics”, Belgrade, June 20-21, 2019
Univerzitet u Beogradu - Hemijski fakultet., 25-25.
https://hdl.handle.net/21.15107/rcub_intor_775
Prodić I, Smiljanić K, Mihailović J, Hoffmann-Sommergruber K, Ćirković-Veličković T. Digestomics of raw and roasted hazelnut according to Infogest protocol and characterization of gastric-phase products. in Abstract Book of the 1st FoodEnTwin Workshop “Food and Environmental -Omics”, Belgrade, June 20-21, 2019. 2019;:25-25.
https://hdl.handle.net/21.15107/rcub_intor_775 .
Prodić, Ivana, Smiljanić, Katarina, Mihailović, Jelena, Hoffmann-Sommergruber, Karin, Ćirković-Veličković, Tanja, "Digestomics of raw and roasted hazelnut according to Infogest protocol and characterization of gastric-phase products" in Abstract Book of the 1st FoodEnTwin Workshop “Food and Environmental -Omics”, Belgrade, June 20-21, 2019 (2019):25-25,
https://hdl.handle.net/21.15107/rcub_intor_775 .

Comparative study of raw and thermally treated peanut major allergen post- translational modifications (PTMs)

Mihailović, Jelena; Prodić, Ivana; Smiljanić, Katarina; Ćirković-Veličković, Tanja

(Serbian Proteomic Association - SePA, 2019)

TY  - CONF
AU  - Mihailović, Jelena
AU  - Prodić, Ivana
AU  - Smiljanić, Katarina
AU  - Ćirković-Veličković, Tanja
PY  - 2019
UR  - http://intor.torlakinstitut.com/handle/123456789/770
AB  - Introduction. Peanut allergy affects a large portion of world population causing reactions rangingfrom mild to severe. Major peanut allergen IgE epitopes are well characterized but little is knownabout their post-translational modifications (PTM) and how they are affected by thermaltreatment. PTM profile may differ between raw and thermally treated peanut, which could affectits allergic potential depending on type, size and position of modifications.Objective. Our aim was to analyse and compare PTM profiles of 4 major peanut allergens - Ara h 1,Ara h 2, Ara h 3 and Ara h 6, as well as their amounts in raw and roasted samples using bottom-upproteomics methods.Methodology. Full peanut protein extracts (both thermally treated and non-treated) were digestedin gel and in solution, and analysed by a Top10 nLC-MS/MS method by LTQ Orbitrap XL (ThermoFisher Scientific Inc., Germany). Within the extracts major allergens - Ara h 1, Ara h 2, Ara h 3 andAra h 6 were identified, label free quantified (LFQ) and searched for PTMs by Peaks X software(Bioinformatics solutions Inc.I, Canada). Epitope sequences were acquired from the ImmuneEpitope Database (IEDB www.iedb.org).Main findings. LFQ results show that there is no significant change in the amountsof any of thestudied allergens between raw and roasted extracts.Out of the 4 allergens Ara h 6 is modified in thehighest portion, with respect to the protein size: 15% and 12% of its positions are modified in rawand roasted sample, respectively. Total of 21 modifications were quantified between the twopreparations, with oxidation (M), methylation (K,R) and dethiomethylation affecting the largestnumber of peptides.Conclusions. Peanut allergen epitopes are indeed carriers of PTMs that differ in pattern andquantity between treated and non-treated extracts. The in silico discovered PTMs could affectprotein digestibility and allergenicity. Further investigation is necessary in order to fully understandthe impact protein modifications could have on their allergenic potential.
PB  - Serbian Proteomic Association - SePA
C3  - Book of Abstracts - V SePa Simposium: Proteomics in the analysis of food, environmental protection and medical research, Novi Sad 2019
T1  - Comparative study of raw and thermally treated peanut major allergen post- translational modifications (PTMs)
SP  - 16/L10
UR  - https://hdl.handle.net/21.15107/rcub_intor_770
ER  - 
@conference{
author = "Mihailović, Jelena and Prodić, Ivana and Smiljanić, Katarina and Ćirković-Veličković, Tanja",
year = "2019",
abstract = "Introduction. Peanut allergy affects a large portion of world population causing reactions rangingfrom mild to severe. Major peanut allergen IgE epitopes are well characterized but little is knownabout their post-translational modifications (PTM) and how they are affected by thermaltreatment. PTM profile may differ between raw and thermally treated peanut, which could affectits allergic potential depending on type, size and position of modifications.Objective. Our aim was to analyse and compare PTM profiles of 4 major peanut allergens - Ara h 1,Ara h 2, Ara h 3 and Ara h 6, as well as their amounts in raw and roasted samples using bottom-upproteomics methods.Methodology. Full peanut protein extracts (both thermally treated and non-treated) were digestedin gel and in solution, and analysed by a Top10 nLC-MS/MS method by LTQ Orbitrap XL (ThermoFisher Scientific Inc., Germany). Within the extracts major allergens - Ara h 1, Ara h 2, Ara h 3 andAra h 6 were identified, label free quantified (LFQ) and searched for PTMs by Peaks X software(Bioinformatics solutions Inc.I, Canada). Epitope sequences were acquired from the ImmuneEpitope Database (IEDB www.iedb.org).Main findings. LFQ results show that there is no significant change in the amountsof any of thestudied allergens between raw and roasted extracts.Out of the 4 allergens Ara h 6 is modified in thehighest portion, with respect to the protein size: 15% and 12% of its positions are modified in rawand roasted sample, respectively. Total of 21 modifications were quantified between the twopreparations, with oxidation (M), methylation (K,R) and dethiomethylation affecting the largestnumber of peptides.Conclusions. Peanut allergen epitopes are indeed carriers of PTMs that differ in pattern andquantity between treated and non-treated extracts. The in silico discovered PTMs could affectprotein digestibility and allergenicity. Further investigation is necessary in order to fully understandthe impact protein modifications could have on their allergenic potential.",
publisher = "Serbian Proteomic Association - SePA",
journal = "Book of Abstracts - V SePa Simposium: Proteomics in the analysis of food, environmental protection and medical research, Novi Sad 2019",
title = "Comparative study of raw and thermally treated peanut major allergen post- translational modifications (PTMs)",
pages = "16/L10",
url = "https://hdl.handle.net/21.15107/rcub_intor_770"
}
Mihailović, J., Prodić, I., Smiljanić, K.,& Ćirković-Veličković, T.. (2019). Comparative study of raw and thermally treated peanut major allergen post- translational modifications (PTMs). in Book of Abstracts - V SePa Simposium: Proteomics in the analysis of food, environmental protection and medical research, Novi Sad 2019
Serbian Proteomic Association - SePA., 16/L10.
https://hdl.handle.net/21.15107/rcub_intor_770
Mihailović J, Prodić I, Smiljanić K, Ćirković-Veličković T. Comparative study of raw and thermally treated peanut major allergen post- translational modifications (PTMs). in Book of Abstracts - V SePa Simposium: Proteomics in the analysis of food, environmental protection and medical research, Novi Sad 2019. 2019;:16/L10.
https://hdl.handle.net/21.15107/rcub_intor_770 .
Mihailović, Jelena, Prodić, Ivana, Smiljanić, Katarina, Ćirković-Veličković, Tanja, "Comparative study of raw and thermally treated peanut major allergen post- translational modifications (PTMs)" in Book of Abstracts - V SePa Simposium: Proteomics in the analysis of food, environmental protection and medical research, Novi Sad 2019 (2019):16/L10,
https://hdl.handle.net/21.15107/rcub_intor_770 .

Gastric digestome of whole peanut grains from the aspect of immunoproteomics: Characterization of digested allergens in the real food matrix

Prodić, Ivana; Stanić-Vučinić, Dragana; Apostolović, Danijela; Radosavljević, Jelena; Mihailović, Jelena; Smiljanić, Katarina; Ćirković-Veličković, Tanja

(Srpsko Udruženje za Proteomiku; IBISS, 2018)

TY  - CONF
AU  - Prodić, Ivana
AU  - Stanić-Vučinić, Dragana
AU  - Apostolović, Danijela
AU  - Radosavljević, Jelena
AU  - Mihailović, Jelena
AU  - Smiljanić, Katarina
AU  - Ćirković-Veličković, Tanja
PY  - 2018
UR  - http://intor.torlakinstitut.com/handle/123456789/789
AB  - Objective: Major peanut allergens, Ara h 2 and Ara h 6, are known to be resistant to pepsindigestion, and they sensitize individual via the gastrointestinal tract. Mikenus et al. published astandardized static digestion method for food, based on physiological conditions emphasizing theimpact of food matrices. Immunoreactive proteins (large fragments) and peptides (short digestionresistant peptides SDRPs; <10 kDa), to which the immune system of the gastrointestinal tract isexposed during digestion of peanut proteins, has not been investigated under pure physiologicalconditions suggested by this protocol.Matherial and methods: Whole grain of grounded raw peanut was incubated with human α-amylase, and pepsin, mimicking the effects of oral and gastric digestion, in total duration of 2h.Bottom up proteomic approach, immunoblotting with allergen-specific antibodies from peanut-sensitized patients, enzyme-linked immunosorbent inhibition assay and ImmunoCAP tests, wereused to identify and characterize peanut digesta.Results: After 2h of oral/gastric phase we got, intact proteins, large, digestion resistant peptides(DRP) and SDRPs, as well. Ara h 2 and Ara h 6 remained mostly intact, and short DRPs from Ara h2 and Ara h 6 were more potent in inhibiting IgE binding than Ara h 1 and Ara 3. Ara h 1 and Ara h3 showed preserved allergenic capacity, as well. Almost all of identified short DRPs from Ara h 1,Ara h 2 and Ara h 3, with preserved allergenic potential, were constituents of continuous epitopesequences found via Immune Epitope Database (www.iedb.org).Conclusion: Processes of protein extraction from the matrix and their enzymatic digestion occursimultaneously. Oral and gastric phase digestion products of raw peanut are intact proteins, largeand short digestion resistant peptides. Under these conditions Ara h 2 and Ara h 6 are expectedly
PB  - Srpsko Udruženje za Proteomiku; IBISS
C3  - IV Simpozijum srpskog udruženja za proteomiku – SePA, Interaktomika i glikoproteomika: novi pristup u analizi proteina na velikoj skali, 25. maj 2018, Beograd, Srbija
T1  - Gastric digestome of whole peanut grains from the aspect of immunoproteomics: Characterization of digested allergens in the real food matrix
UR  - https://hdl.handle.net/21.15107/rcub_intor_789
ER  - 
@conference{
author = "Prodić, Ivana and Stanić-Vučinić, Dragana and Apostolović, Danijela and Radosavljević, Jelena and Mihailović, Jelena and Smiljanić, Katarina and Ćirković-Veličković, Tanja",
year = "2018",
abstract = "Objective: Major peanut allergens, Ara h 2 and Ara h 6, are known to be resistant to pepsindigestion, and they sensitize individual via the gastrointestinal tract. Mikenus et al. published astandardized static digestion method for food, based on physiological conditions emphasizing theimpact of food matrices. Immunoreactive proteins (large fragments) and peptides (short digestionresistant peptides SDRPs; <10 kDa), to which the immune system of the gastrointestinal tract isexposed during digestion of peanut proteins, has not been investigated under pure physiologicalconditions suggested by this protocol.Matherial and methods: Whole grain of grounded raw peanut was incubated with human α-amylase, and pepsin, mimicking the effects of oral and gastric digestion, in total duration of 2h.Bottom up proteomic approach, immunoblotting with allergen-specific antibodies from peanut-sensitized patients, enzyme-linked immunosorbent inhibition assay and ImmunoCAP tests, wereused to identify and characterize peanut digesta.Results: After 2h of oral/gastric phase we got, intact proteins, large, digestion resistant peptides(DRP) and SDRPs, as well. Ara h 2 and Ara h 6 remained mostly intact, and short DRPs from Ara h2 and Ara h 6 were more potent in inhibiting IgE binding than Ara h 1 and Ara 3. Ara h 1 and Ara h3 showed preserved allergenic capacity, as well. Almost all of identified short DRPs from Ara h 1,Ara h 2 and Ara h 3, with preserved allergenic potential, were constituents of continuous epitopesequences found via Immune Epitope Database (www.iedb.org).Conclusion: Processes of protein extraction from the matrix and their enzymatic digestion occursimultaneously. Oral and gastric phase digestion products of raw peanut are intact proteins, largeand short digestion resistant peptides. Under these conditions Ara h 2 and Ara h 6 are expectedly",
publisher = "Srpsko Udruženje za Proteomiku; IBISS",
journal = "IV Simpozijum srpskog udruženja za proteomiku – SePA, Interaktomika i glikoproteomika: novi pristup u analizi proteina na velikoj skali, 25. maj 2018, Beograd, Srbija",
title = "Gastric digestome of whole peanut grains from the aspect of immunoproteomics: Characterization of digested allergens in the real food matrix",
url = "https://hdl.handle.net/21.15107/rcub_intor_789"
}
Prodić, I., Stanić-Vučinić, D., Apostolović, D., Radosavljević, J., Mihailović, J., Smiljanić, K.,& Ćirković-Veličković, T.. (2018). Gastric digestome of whole peanut grains from the aspect of immunoproteomics: Characterization of digested allergens in the real food matrix. in IV Simpozijum srpskog udruženja za proteomiku – SePA, Interaktomika i glikoproteomika: novi pristup u analizi proteina na velikoj skali, 25. maj 2018, Beograd, Srbija
Srpsko Udruženje za Proteomiku; IBISS..
https://hdl.handle.net/21.15107/rcub_intor_789
Prodić I, Stanić-Vučinić D, Apostolović D, Radosavljević J, Mihailović J, Smiljanić K, Ćirković-Veličković T. Gastric digestome of whole peanut grains from the aspect of immunoproteomics: Characterization of digested allergens in the real food matrix. in IV Simpozijum srpskog udruženja za proteomiku – SePA, Interaktomika i glikoproteomika: novi pristup u analizi proteina na velikoj skali, 25. maj 2018, Beograd, Srbija. 2018;.
https://hdl.handle.net/21.15107/rcub_intor_789 .
Prodić, Ivana, Stanić-Vučinić, Dragana, Apostolović, Danijela, Radosavljević, Jelena, Mihailović, Jelena, Smiljanić, Katarina, Ćirković-Veličković, Tanja, "Gastric digestome of whole peanut grains from the aspect of immunoproteomics: Characterization of digested allergens in the real food matrix" in IV Simpozijum srpskog udruženja za proteomiku – SePA, Interaktomika i glikoproteomika: novi pristup u analizi proteina na velikoj skali, 25. maj 2018, Beograd, Srbija (2018),
https://hdl.handle.net/21.15107/rcub_intor_789 .

Digestomics of Japanese abalone in real food matrix

Prodić, Ivana; Khulal, Urmila; Mutić, Jelena; Mihailović, Jelena; Smiljanić, Katarina; Ćirković-Veličković, Tanja

(Srpsko Udruženje za Proteomiku, SePA; IBISS, 2018)

TY  - CONF
AU  - Prodić, Ivana
AU  - Khulal, Urmila
AU  - Mutić, Jelena
AU  - Mihailović, Jelena
AU  - Smiljanić, Katarina
AU  - Ćirković-Veličković, Tanja
PY  - 2018
UR  - http://intor.torlakinstitut.com/handle/123456789/774
AB  - Objective: Haliotis discus (Japanese abalone), mollusks among various shellfish, is a highlynutritive food resource in the world, but also among the eight allergic food groups accounting forapproximately 90% of all immunoglobulin E food allergies worldwide. The general objective of ourresearch is to comprehensively investigate stability and structures of pepsin-resistant allergens, oftheir larger fragments, and of short digestion resistant peptides (SDRPs) released by pepsindigestion of whole raw and extract of shellfish, under standardized and physiologically relevantgastric conditions.Materials and Methods: Extract of raw whole shellfish (eRSS) and whole raw shellfish (wRSS),were pepsin digested according to standardized static digestion protocol. Controls were treated in asame manner without adding pepsin. Supernatant of samples and its counterpart controls wereprecipitated with TCA/acetone. Obtained proteins were assessed by 2D SDS PAGE and 1D SDS-PAGE, under reducing and non-reducing conditions. 1D SDS-PAGE of RSS were analyzed byncLC-MS/MS (Orbitrap LTQ) shot-gun proteomics. Relative quantification was performed by LFQalgorithm within Peaks 8.5 software package Bioinformatics Solutions Inc. (BSI), Waterloo,Canada.Results and Conclusion: 1D SDS-PAGE analysis of eRSS and wRSS, and its controls showed arange of proteins in varied concentrations between 10-250 kDa. In extracted and whole rawshellfish, approximately 22 prominent protein bands were observed including the distinct bandscorresponding with the molecular weights of recognized shellfish allergen, tropomyosin (37-39kDa). Fewer high molecular weight proteins were observed followed by protein smearing,specifically around the low molecular weight protein bands. The smearing could possibly be due tothe breakdown products and the glycation. There were slight differences between the proteinprofiles under reducing and non-reducing conditions as well. Nevertheless, there was the retentionof a band in the 37kDa molecular weight marker in all 4 samples, likely consistent with heat stabletropomyosin (TM). Mass spectrometry showed allergens that are characterized (Hal d 1 and Hal di1), with 90% of sequence homology with main tropomyosin allergens from seafood.Scientific impact and relevance: The results will highlight effects of food matrix on shellfishallergens digestibility proving its relevancy in molecular allergology. Moreover, an insight will beobtained on the differences in digestibility of allergenic versus non-allergenic tropomyosins in thereal food matrix.
PB  - Srpsko Udruženje za Proteomiku, SePA; IBISS
C3  - IV Simpozijum srpskog udruženja za proteomiku – SePA, Interaktomika i glikoproteomika: novi pristup u analizi proteina na velikoj skali, 25. maj 2018, Beograd, Srbija
T1  - Digestomics of Japanese abalone in real food matrix
EP  - 10
SP  - 10
UR  - https://hdl.handle.net/21.15107/rcub_intor_774
ER  - 
@conference{
author = "Prodić, Ivana and Khulal, Urmila and Mutić, Jelena and Mihailović, Jelena and Smiljanić, Katarina and Ćirković-Veličković, Tanja",
year = "2018",
abstract = "Objective: Haliotis discus (Japanese abalone), mollusks among various shellfish, is a highlynutritive food resource in the world, but also among the eight allergic food groups accounting forapproximately 90% of all immunoglobulin E food allergies worldwide. The general objective of ourresearch is to comprehensively investigate stability and structures of pepsin-resistant allergens, oftheir larger fragments, and of short digestion resistant peptides (SDRPs) released by pepsindigestion of whole raw and extract of shellfish, under standardized and physiologically relevantgastric conditions.Materials and Methods: Extract of raw whole shellfish (eRSS) and whole raw shellfish (wRSS),were pepsin digested according to standardized static digestion protocol. Controls were treated in asame manner without adding pepsin. Supernatant of samples and its counterpart controls wereprecipitated with TCA/acetone. Obtained proteins were assessed by 2D SDS PAGE and 1D SDS-PAGE, under reducing and non-reducing conditions. 1D SDS-PAGE of RSS were analyzed byncLC-MS/MS (Orbitrap LTQ) shot-gun proteomics. Relative quantification was performed by LFQalgorithm within Peaks 8.5 software package Bioinformatics Solutions Inc. (BSI), Waterloo,Canada.Results and Conclusion: 1D SDS-PAGE analysis of eRSS and wRSS, and its controls showed arange of proteins in varied concentrations between 10-250 kDa. In extracted and whole rawshellfish, approximately 22 prominent protein bands were observed including the distinct bandscorresponding with the molecular weights of recognized shellfish allergen, tropomyosin (37-39kDa). Fewer high molecular weight proteins were observed followed by protein smearing,specifically around the low molecular weight protein bands. The smearing could possibly be due tothe breakdown products and the glycation. There were slight differences between the proteinprofiles under reducing and non-reducing conditions as well. Nevertheless, there was the retentionof a band in the 37kDa molecular weight marker in all 4 samples, likely consistent with heat stabletropomyosin (TM). Mass spectrometry showed allergens that are characterized (Hal d 1 and Hal di1), with 90% of sequence homology with main tropomyosin allergens from seafood.Scientific impact and relevance: The results will highlight effects of food matrix on shellfishallergens digestibility proving its relevancy in molecular allergology. Moreover, an insight will beobtained on the differences in digestibility of allergenic versus non-allergenic tropomyosins in thereal food matrix.",
publisher = "Srpsko Udruženje za Proteomiku, SePA; IBISS",
journal = "IV Simpozijum srpskog udruženja za proteomiku – SePA, Interaktomika i glikoproteomika: novi pristup u analizi proteina na velikoj skali, 25. maj 2018, Beograd, Srbija",
title = "Digestomics of Japanese abalone in real food matrix",
pages = "10-10",
url = "https://hdl.handle.net/21.15107/rcub_intor_774"
}
Prodić, I., Khulal, U., Mutić, J., Mihailović, J., Smiljanić, K.,& Ćirković-Veličković, T.. (2018). Digestomics of Japanese abalone in real food matrix. in IV Simpozijum srpskog udruženja za proteomiku – SePA, Interaktomika i glikoproteomika: novi pristup u analizi proteina na velikoj skali, 25. maj 2018, Beograd, Srbija
Srpsko Udruženje za Proteomiku, SePA; IBISS., 10-10.
https://hdl.handle.net/21.15107/rcub_intor_774
Prodić I, Khulal U, Mutić J, Mihailović J, Smiljanić K, Ćirković-Veličković T. Digestomics of Japanese abalone in real food matrix. in IV Simpozijum srpskog udruženja za proteomiku – SePA, Interaktomika i glikoproteomika: novi pristup u analizi proteina na velikoj skali, 25. maj 2018, Beograd, Srbija. 2018;:10-10.
https://hdl.handle.net/21.15107/rcub_intor_774 .
Prodić, Ivana, Khulal, Urmila, Mutić, Jelena, Mihailović, Jelena, Smiljanić, Katarina, Ćirković-Veličković, Tanja, "Digestomics of Japanese abalone in real food matrix" in IV Simpozijum srpskog udruženja za proteomiku – SePA, Interaktomika i glikoproteomika: novi pristup u analizi proteina na velikoj skali, 25. maj 2018, Beograd, Srbija (2018):10-10,
https://hdl.handle.net/21.15107/rcub_intor_774 .

Digestomics of walnut and its nsLTPs allergens reveals their ultimate resistance to gastric digestion

Prodić, Ivana; Dubiela, Pawel; Mihailović, Jelena; Stanić-Vučinić, Dragana; Smiljanić, Katarina; Hoffmann-Sommergruber, Karin; Ćirković-Veličković, Tanja

(IMPARAS Cost Action FA1402, 2018)

TY  - CONF
AU  - Prodić, Ivana
AU  - Dubiela, Pawel
AU  - Mihailović, Jelena
AU  - Stanić-Vučinić, Dragana
AU  - Smiljanić, Katarina
AU  - Hoffmann-Sommergruber, Karin
AU  - Ćirković-Veličković, Tanja
PY  - 2018
UR  - http://intor.torlakinstitut.com/handle/123456789/776
AB  - Background: Sensitization to non-specific lipid transfer protein (ns-LTPs) in plant foods is regarded as a risk factor for generalized allergic reactions. Stability to gastric digestion represents very important parameter of food proteins allergenicity. Usually studies of digestion were carried out on purified proteins, but has never been examined the influence of different food matrices on different allergens. Allergens from the nsLTP family are known to share a characteristic structure which is highly resistant to proteolysis, and therefore, IgE cross-reactivity of nsLTPs needs to be investigated in the environment such as complex food matrix.Objective: The aim of this research project is to reveal how proteins are digested (by Minekus protocol) within the natural food matrix and possible consequences on their allergenicity, with the special focus on ns-LTP.Methods: Pure nsLTPs from walnut were labelled with Alexa 633 and added to whole grain of grounded raw walnuts, incubated with human α-amylase, and pepsin, therefore mimicking the effects of oral and gastric digestion, in total duration of 2h. Proteins extracted from the mixture were analyzed by one-dimensional (1D) and two-dimensional SDS-PAGe, and respective 1D and 2D immunoblots.Results: Most proteins from pepsin digested walnut sample were more resistant to digestion according to 1D SDS PAGE. Pepsin digested raw walnut sample with nsLTP were assessed by 2D PAGE to compare profiles of the digested and control sample (no pepsin added). 2D SDSPAGE of digested and control walnut samples showed almost identical profiles, especially in the context of fluorescently labelled nsLTP allergens. These results demonstrate substantial resistance of nsLTP allergens to gastric digestion since they remained mostly intact after 2 h of gastric (pepsin) digestion.Conclusion: Further research is needed to be able to grade stability/resistance of selected food allergens to gastric digestion as a consequence of food matrix modulating effects. We propose that certain combinations of foods and allergens could provide additional protection or on the contrary ease the digestion, by comparing trends between control and digested samples and between different digested combinations as well.
PB  - IMPARAS Cost Action FA1402
C3  - Proceedings of the 4th International ImpARAS Conference, Portici (Naples), Italy, June 19-21, 2018
T1  - Digestomics of walnut and its nsLTPs allergens reveals their ultimate resistance to gastric digestion
EP  - 59
SP  - 59
UR  - https://hdl.handle.net/21.15107/rcub_intor_776
ER  - 
@conference{
author = "Prodić, Ivana and Dubiela, Pawel and Mihailović, Jelena and Stanić-Vučinić, Dragana and Smiljanić, Katarina and Hoffmann-Sommergruber, Karin and Ćirković-Veličković, Tanja",
year = "2018",
abstract = "Background: Sensitization to non-specific lipid transfer protein (ns-LTPs) in plant foods is regarded as a risk factor for generalized allergic reactions. Stability to gastric digestion represents very important parameter of food proteins allergenicity. Usually studies of digestion were carried out on purified proteins, but has never been examined the influence of different food matrices on different allergens. Allergens from the nsLTP family are known to share a characteristic structure which is highly resistant to proteolysis, and therefore, IgE cross-reactivity of nsLTPs needs to be investigated in the environment such as complex food matrix.Objective: The aim of this research project is to reveal how proteins are digested (by Minekus protocol) within the natural food matrix and possible consequences on their allergenicity, with the special focus on ns-LTP.Methods: Pure nsLTPs from walnut were labelled with Alexa 633 and added to whole grain of grounded raw walnuts, incubated with human α-amylase, and pepsin, therefore mimicking the effects of oral and gastric digestion, in total duration of 2h. Proteins extracted from the mixture were analyzed by one-dimensional (1D) and two-dimensional SDS-PAGe, and respective 1D and 2D immunoblots.Results: Most proteins from pepsin digested walnut sample were more resistant to digestion according to 1D SDS PAGE. Pepsin digested raw walnut sample with nsLTP were assessed by 2D PAGE to compare profiles of the digested and control sample (no pepsin added). 2D SDSPAGE of digested and control walnut samples showed almost identical profiles, especially in the context of fluorescently labelled nsLTP allergens. These results demonstrate substantial resistance of nsLTP allergens to gastric digestion since they remained mostly intact after 2 h of gastric (pepsin) digestion.Conclusion: Further research is needed to be able to grade stability/resistance of selected food allergens to gastric digestion as a consequence of food matrix modulating effects. We propose that certain combinations of foods and allergens could provide additional protection or on the contrary ease the digestion, by comparing trends between control and digested samples and between different digested combinations as well.",
publisher = "IMPARAS Cost Action FA1402",
journal = "Proceedings of the 4th International ImpARAS Conference, Portici (Naples), Italy, June 19-21, 2018",
title = "Digestomics of walnut and its nsLTPs allergens reveals their ultimate resistance to gastric digestion",
pages = "59-59",
url = "https://hdl.handle.net/21.15107/rcub_intor_776"
}
Prodić, I., Dubiela, P., Mihailović, J., Stanić-Vučinić, D., Smiljanić, K., Hoffmann-Sommergruber, K.,& Ćirković-Veličković, T.. (2018). Digestomics of walnut and its nsLTPs allergens reveals their ultimate resistance to gastric digestion. in Proceedings of the 4th International ImpARAS Conference, Portici (Naples), Italy, June 19-21, 2018
IMPARAS Cost Action FA1402., 59-59.
https://hdl.handle.net/21.15107/rcub_intor_776
Prodić I, Dubiela P, Mihailović J, Stanić-Vučinić D, Smiljanić K, Hoffmann-Sommergruber K, Ćirković-Veličković T. Digestomics of walnut and its nsLTPs allergens reveals their ultimate resistance to gastric digestion. in Proceedings of the 4th International ImpARAS Conference, Portici (Naples), Italy, June 19-21, 2018. 2018;:59-59.
https://hdl.handle.net/21.15107/rcub_intor_776 .
Prodić, Ivana, Dubiela, Pawel, Mihailović, Jelena, Stanić-Vučinić, Dragana, Smiljanić, Katarina, Hoffmann-Sommergruber, Karin, Ćirković-Veličković, Tanja, "Digestomics of walnut and its nsLTPs allergens reveals their ultimate resistance to gastric digestion" in Proceedings of the 4th International ImpARAS Conference, Portici (Naples), Italy, June 19-21, 2018 (2018):59-59,
https://hdl.handle.net/21.15107/rcub_intor_776 .

Characterisation of peanut allergens and possible post-translational modifications (PTMs)

Liu, Shu-hua; Mihailović, Jelena; Smiljanić, Katarina; Epstein, Michelle M.; Ćirković-Veličković, Tanja

(IMPARAS Cost Action FA1402, 2018)

TY  - CONF
AU  - Liu, Shu-hua
AU  - Mihailović, Jelena
AU  - Smiljanić, Katarina
AU  - Epstein, Michelle M.
AU  - Ćirković-Veličković, Tanja
PY  - 2018
UR  - http://intor.torlakinstitut.com/handle/123456789/768
AB  - BackgroundPeanut allergy is the most common type of food allergy causing severe reactions or even fatal anaphylaxis in sensitised individuals. The major peanut allergens are Ara h 1, Ara h 2, Ara h 3, and Ara h 6 which cause the most severe responses. Their molecular properties have been characterised but possible post-translational modifications (PTMs) that might explain their severe allergenicity are not well understood. The goal of this study was to utilize a combination of nanoLC-Mass Spectrometry (MS)/MS methods and PEAKS Studio 8.0 (Bioinformatics Solutions Inc., Ontario, Canada) program to evaluate PTMs in the major peanut allergens.MethodAcquired MS data of purified peanut allergens, Ara h 1, Ara h 2, Ara h 3, and Ara h 6 were analysed and identified via hybridized databases obtained from UniProt (www.uniprot.org).More than 1200 reviewed (Swiss-Prot) and unreviewed (TrEMBL) entries from peanut were combined with common MS contaminants, the Repository of Adventitious Proteins (cRAP), to create a hybridized database. We then focused on Ara h 2 (Conglutin-7) and Ara h 6 (Conglutin) because of their propensity to cause severe anaphylactic reactions. Epitopes found in the Immune Epitope Database (www.iedb.org) were analysed for possible PTMs by matching PEAKS PTM results with mapped positions of epitope sequences.ResultsWe identified 37 proteins from the purified peanut allergens. There were 33 peanut proteins and 4 contaminants originating from human keratin and pig trypsin. Ara h 2 had 242 epitopes, 29 potential PTMs and 4 mutations. Eight of the epitopes had up to 8 possible PTMs. Several relevant PTMs were discovered, including tryptophan oxidation to oxolactone in position 25, sulfonation of N-terminus of cysteine in position 116 and oxidation of methionine in position 50 and 125. Notably, all had either a “NNQRCMCEALQ” or “QQIMENQSD” motif, which are linked to Th2 cytokines and T cell proliferation. We observed 8 epitopes, 9 likely PTMs and no mutations for Ara h 6 and half of the epitopes had possible PTMs and a maximum of 4 PTMs was found on one epitope.ConclusionThe analysis of relevant peanut allergens by nanoLC-MS/MS methods and PEAKS Studio 8.0 program revealed several PTMs, which might have important ramifications due to their influence on allergenicity and digestibility resulting from modification properties by trypsin and other food protein enzymes. These data suggest that PTMs on certain peanut epitopes could be involved in the pathogenesis of severe food allergy to peanuts.
PB  - IMPARAS Cost Action FA1402
C3  - Proceedings of the 4th International ImpARAS Conference, Portici (Naples), Italy, June 19-21, 2018
T1  - Characterisation of peanut allergens and possible post-translational modifications (PTMs)
EP  - 57
SP  - 57
UR  - https://hdl.handle.net/21.15107/rcub_intor_768
ER  - 
@conference{
author = "Liu, Shu-hua and Mihailović, Jelena and Smiljanić, Katarina and Epstein, Michelle M. and Ćirković-Veličković, Tanja",
year = "2018",
abstract = "BackgroundPeanut allergy is the most common type of food allergy causing severe reactions or even fatal anaphylaxis in sensitised individuals. The major peanut allergens are Ara h 1, Ara h 2, Ara h 3, and Ara h 6 which cause the most severe responses. Their molecular properties have been characterised but possible post-translational modifications (PTMs) that might explain their severe allergenicity are not well understood. The goal of this study was to utilize a combination of nanoLC-Mass Spectrometry (MS)/MS methods and PEAKS Studio 8.0 (Bioinformatics Solutions Inc., Ontario, Canada) program to evaluate PTMs in the major peanut allergens.MethodAcquired MS data of purified peanut allergens, Ara h 1, Ara h 2, Ara h 3, and Ara h 6 were analysed and identified via hybridized databases obtained from UniProt (www.uniprot.org).More than 1200 reviewed (Swiss-Prot) and unreviewed (TrEMBL) entries from peanut were combined with common MS contaminants, the Repository of Adventitious Proteins (cRAP), to create a hybridized database. We then focused on Ara h 2 (Conglutin-7) and Ara h 6 (Conglutin) because of their propensity to cause severe anaphylactic reactions. Epitopes found in the Immune Epitope Database (www.iedb.org) were analysed for possible PTMs by matching PEAKS PTM results with mapped positions of epitope sequences.ResultsWe identified 37 proteins from the purified peanut allergens. There were 33 peanut proteins and 4 contaminants originating from human keratin and pig trypsin. Ara h 2 had 242 epitopes, 29 potential PTMs and 4 mutations. Eight of the epitopes had up to 8 possible PTMs. Several relevant PTMs were discovered, including tryptophan oxidation to oxolactone in position 25, sulfonation of N-terminus of cysteine in position 116 and oxidation of methionine in position 50 and 125. Notably, all had either a “NNQRCMCEALQ” or “QQIMENQSD” motif, which are linked to Th2 cytokines and T cell proliferation. We observed 8 epitopes, 9 likely PTMs and no mutations for Ara h 6 and half of the epitopes had possible PTMs and a maximum of 4 PTMs was found on one epitope.ConclusionThe analysis of relevant peanut allergens by nanoLC-MS/MS methods and PEAKS Studio 8.0 program revealed several PTMs, which might have important ramifications due to their influence on allergenicity and digestibility resulting from modification properties by trypsin and other food protein enzymes. These data suggest that PTMs on certain peanut epitopes could be involved in the pathogenesis of severe food allergy to peanuts.",
publisher = "IMPARAS Cost Action FA1402",
journal = "Proceedings of the 4th International ImpARAS Conference, Portici (Naples), Italy, June 19-21, 2018",
title = "Characterisation of peanut allergens and possible post-translational modifications (PTMs)",
pages = "57-57",
url = "https://hdl.handle.net/21.15107/rcub_intor_768"
}
Liu, S., Mihailović, J., Smiljanić, K., Epstein, M. M.,& Ćirković-Veličković, T.. (2018). Characterisation of peanut allergens and possible post-translational modifications (PTMs). in Proceedings of the 4th International ImpARAS Conference, Portici (Naples), Italy, June 19-21, 2018
IMPARAS Cost Action FA1402., 57-57.
https://hdl.handle.net/21.15107/rcub_intor_768
Liu S, Mihailović J, Smiljanić K, Epstein MM, Ćirković-Veličković T. Characterisation of peanut allergens and possible post-translational modifications (PTMs). in Proceedings of the 4th International ImpARAS Conference, Portici (Naples), Italy, June 19-21, 2018. 2018;:57-57.
https://hdl.handle.net/21.15107/rcub_intor_768 .
Liu, Shu-hua, Mihailović, Jelena, Smiljanić, Katarina, Epstein, Michelle M., Ćirković-Veličković, Tanja, "Characterisation of peanut allergens and possible post-translational modifications (PTMs)" in Proceedings of the 4th International ImpARAS Conference, Portici (Naples), Italy, June 19-21, 2018 (2018):57-57,
https://hdl.handle.net/21.15107/rcub_intor_768 .

Influence of peanut matrix on stability of allergens in gastric-simulated digesta: 2S albumins are main contributors to the IgE reactivity of short digestion-resistant peptides

Prodić, Ivana; Stanić-Vučinić, Dragana; Apostolović, Danijela; Mihailović, Jelena; Radibratović, M.; Radosavljević, Jelena; Burazer, Lidija; Milcić, M.; Smiljanić, Katarina; van Hage, Marianne; Ćirković-Veličković, Tanja

(Blackwell Publishing Ltd, 2018)

TY  - JOUR
AU  - Prodić, Ivana
AU  - Stanić-Vučinić, Dragana
AU  - Apostolović, Danijela
AU  - Mihailović, Jelena
AU  - Radibratović, M.
AU  - Radosavljević, Jelena
AU  - Burazer, Lidija
AU  - Milcić, M.
AU  - Smiljanić, Katarina
AU  - van Hage, Marianne
AU  - Ćirković-Veličković, Tanja
PY  - 2018
UR  - http://intor.torlakinstitut.com/handle/123456789/608
AB  - Background: Most food allergens sensitizing via the gastrointestinal tract are stable proteins that are resistant to pepsin digestion, in particular major peanut allergens, Ara h 2 and Ara h 6. Survival of their large fragments is essential for sensitizing capacity. However, the immunoreactive proteins/peptides to which the immune system of the gastrointestinal tract is exposed during digestion of peanut proteins are unknown. Particularly, the IgE reactivity of short digestion-resistant peptides (SDRPs;  lt 10 kDa) released by gastric digestion under standardized and physiologically relevant in vitro conditions has not been investigated. Objective: The aim of this study was to investigate and identify digestion products of major peanut allergens and in particular to examine IgE reactivity of SDRPs released by pepsin digestion of whole peanut grains. Methods: Two-dimensional gel-based proteomics and shotgun peptidomics, immunoblotting with allergen-specific antibodies from peanut-sensitized patients, enzyme-linked immunosorbent inhibition assay and ImmunoCAP tests, including far ultraviolet-circular dichroism spectroscopy were used to identify and characterize peanut digesta. Results: Ara h 2 and Ara h 6 remained mostly intact, and SDRPs from Ara h 2 were more potent in inhibiting IgE binding than Ara h 1 and Ara 3. Ara h 1 and Ara h 3 exhibited sequential digestion into a series of digestion-resistant peptides with preserved allergenic capacity. A high number of identified SDRPs from Ara h 1, Ara h 2 and Ara h 3 were part of short continuous epitope sequences and possessed substantial allergenic potential. Conclusion and Clinical Relevance: Peanut grain digestion by oral and gastric phase enzymes generates mixture of products, where the major peanut allergens remain intact and their digested peptides have preserved allergenic capacity highlighting their important roles in allergic reactions to peanut.
PB  - Blackwell Publishing Ltd
T2  - Clinical and Experimental Allergy
T1  - Influence of peanut matrix on stability of allergens in gastric-simulated digesta: 2S albumins are main contributors to the IgE reactivity of short digestion-resistant peptides
EP  - 740
IS  - 6
SP  - 731
VL  - 48
DO  - 10.1111/cea.13113
ER  - 
@article{
author = "Prodić, Ivana and Stanić-Vučinić, Dragana and Apostolović, Danijela and Mihailović, Jelena and Radibratović, M. and Radosavljević, Jelena and Burazer, Lidija and Milcić, M. and Smiljanić, Katarina and van Hage, Marianne and Ćirković-Veličković, Tanja",
year = "2018",
abstract = "Background: Most food allergens sensitizing via the gastrointestinal tract are stable proteins that are resistant to pepsin digestion, in particular major peanut allergens, Ara h 2 and Ara h 6. Survival of their large fragments is essential for sensitizing capacity. However, the immunoreactive proteins/peptides to which the immune system of the gastrointestinal tract is exposed during digestion of peanut proteins are unknown. Particularly, the IgE reactivity of short digestion-resistant peptides (SDRPs;  lt 10 kDa) released by gastric digestion under standardized and physiologically relevant in vitro conditions has not been investigated. Objective: The aim of this study was to investigate and identify digestion products of major peanut allergens and in particular to examine IgE reactivity of SDRPs released by pepsin digestion of whole peanut grains. Methods: Two-dimensional gel-based proteomics and shotgun peptidomics, immunoblotting with allergen-specific antibodies from peanut-sensitized patients, enzyme-linked immunosorbent inhibition assay and ImmunoCAP tests, including far ultraviolet-circular dichroism spectroscopy were used to identify and characterize peanut digesta. Results: Ara h 2 and Ara h 6 remained mostly intact, and SDRPs from Ara h 2 were more potent in inhibiting IgE binding than Ara h 1 and Ara 3. Ara h 1 and Ara h 3 exhibited sequential digestion into a series of digestion-resistant peptides with preserved allergenic capacity. A high number of identified SDRPs from Ara h 1, Ara h 2 and Ara h 3 were part of short continuous epitope sequences and possessed substantial allergenic potential. Conclusion and Clinical Relevance: Peanut grain digestion by oral and gastric phase enzymes generates mixture of products, where the major peanut allergens remain intact and their digested peptides have preserved allergenic capacity highlighting their important roles in allergic reactions to peanut.",
publisher = "Blackwell Publishing Ltd",
journal = "Clinical and Experimental Allergy",
title = "Influence of peanut matrix on stability of allergens in gastric-simulated digesta: 2S albumins are main contributors to the IgE reactivity of short digestion-resistant peptides",
pages = "740-731",
number = "6",
volume = "48",
doi = "10.1111/cea.13113"
}
Prodić, I., Stanić-Vučinić, D., Apostolović, D., Mihailović, J., Radibratović, M., Radosavljević, J., Burazer, L., Milcić, M., Smiljanić, K., van Hage, M.,& Ćirković-Veličković, T.. (2018). Influence of peanut matrix on stability of allergens in gastric-simulated digesta: 2S albumins are main contributors to the IgE reactivity of short digestion-resistant peptides. in Clinical and Experimental Allergy
Blackwell Publishing Ltd., 48(6), 731-740.
https://doi.org/10.1111/cea.13113
Prodić I, Stanić-Vučinić D, Apostolović D, Mihailović J, Radibratović M, Radosavljević J, Burazer L, Milcić M, Smiljanić K, van Hage M, Ćirković-Veličković T. Influence of peanut matrix on stability of allergens in gastric-simulated digesta: 2S albumins are main contributors to the IgE reactivity of short digestion-resistant peptides. in Clinical and Experimental Allergy. 2018;48(6):731-740.
doi:10.1111/cea.13113 .
Prodić, Ivana, Stanić-Vučinić, Dragana, Apostolović, Danijela, Mihailović, Jelena, Radibratović, M., Radosavljević, Jelena, Burazer, Lidija, Milcić, M., Smiljanić, Katarina, van Hage, Marianne, Ćirković-Veličković, Tanja, "Influence of peanut matrix on stability of allergens in gastric-simulated digesta: 2S albumins are main contributors to the IgE reactivity of short digestion-resistant peptides" in Clinical and Experimental Allergy, 48, no. 6 (2018):731-740,
https://doi.org/10.1111/cea.13113 . .
3
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Influence of peanut matrix on stability of allergens in gastric-simulated digesta: 2S albumins are main contributors to the IgE reactivity of short digestion-resistant peptides

Prodić, Ivana; Stanić-Vučinić, Dragana; Apostolović, Danijela; Mihailović, Jelena; Radibratović, M.; Radosavljević, Jelena; Burazer, Lidija; Milcić, M.; Smiljanić, Katarina; van Hage, Marianne; Ćirković-Veličković, Tanja

(Blackwell Publishing Ltd, 2018)

TY  - JOUR
AU  - Prodić, Ivana
AU  - Stanić-Vučinić, Dragana
AU  - Apostolović, Danijela
AU  - Mihailović, Jelena
AU  - Radibratović, M.
AU  - Radosavljević, Jelena
AU  - Burazer, Lidija
AU  - Milcić, M.
AU  - Smiljanić, Katarina
AU  - van Hage, Marianne
AU  - Ćirković-Veličković, Tanja
PY  - 2018
UR  - http://intor.torlakinstitut.com/handle/123456789/514
AB  - Background: Most food allergens sensitizing via the gastrointestinal tract are stable proteins that are resistant to pepsin digestion, in particular major peanut allergens, Ara h 2 and Ara h 6. Survival of their large fragments is essential for sensitizing capacity. However, the immunoreactive proteins/peptides to which the immune system of the gastrointestinal tract is exposed during digestion of peanut proteins are unknown. Particularly, the IgE reactivity of short digestion-resistant peptides (SDRPs;  lt 10 kDa) released by gastric digestion under standardized and physiologically relevant in vitro conditions has not been investigated. Objective: The aim of this study was to investigate and identify digestion products of major peanut allergens and in particular to examine IgE reactivity of SDRPs released by pepsin digestion of whole peanut grains. Methods: Two-dimensional gel-based proteomics and shotgun peptidomics, immunoblotting with allergen-specific antibodies from peanut-sensitized patients, enzyme-linked immunosorbent inhibition assay and ImmunoCAP tests, including far ultraviolet-circular dichroism spectroscopy were used to identify and characterize peanut digesta. Results: Ara h 2 and Ara h 6 remained mostly intact, and SDRPs from Ara h 2 were more potent in inhibiting IgE binding than Ara h 1 and Ara 3. Ara h 1 and Ara h 3 exhibited sequential digestion into a series of digestion-resistant peptides with preserved allergenic capacity. A high number of identified SDRPs from Ara h 1, Ara h 2 and Ara h 3 were part of short continuous epitope sequences and possessed substantial allergenic potential. Conclusion and Clinical Relevance: Peanut grain digestion by oral and gastric phase enzymes generates mixture of products, where the major peanut allergens remain intact and their digested peptides have preserved allergenic capacity highlighting their important roles in allergic reactions to peanut.
PB  - Blackwell Publishing Ltd
T2  - Clinical and Experimental Allergy
T1  - Influence of peanut matrix on stability of allergens in gastric-simulated digesta: 2S albumins are main contributors to the IgE reactivity of short digestion-resistant peptides
EP  - 740
IS  - 6
SP  - 731
VL  - 48
DO  - 10.1111/cea.13113
ER  - 
@article{
author = "Prodić, Ivana and Stanić-Vučinić, Dragana and Apostolović, Danijela and Mihailović, Jelena and Radibratović, M. and Radosavljević, Jelena and Burazer, Lidija and Milcić, M. and Smiljanić, Katarina and van Hage, Marianne and Ćirković-Veličković, Tanja",
year = "2018",
abstract = "Background: Most food allergens sensitizing via the gastrointestinal tract are stable proteins that are resistant to pepsin digestion, in particular major peanut allergens, Ara h 2 and Ara h 6. Survival of their large fragments is essential for sensitizing capacity. However, the immunoreactive proteins/peptides to which the immune system of the gastrointestinal tract is exposed during digestion of peanut proteins are unknown. Particularly, the IgE reactivity of short digestion-resistant peptides (SDRPs;  lt 10 kDa) released by gastric digestion under standardized and physiologically relevant in vitro conditions has not been investigated. Objective: The aim of this study was to investigate and identify digestion products of major peanut allergens and in particular to examine IgE reactivity of SDRPs released by pepsin digestion of whole peanut grains. Methods: Two-dimensional gel-based proteomics and shotgun peptidomics, immunoblotting with allergen-specific antibodies from peanut-sensitized patients, enzyme-linked immunosorbent inhibition assay and ImmunoCAP tests, including far ultraviolet-circular dichroism spectroscopy were used to identify and characterize peanut digesta. Results: Ara h 2 and Ara h 6 remained mostly intact, and SDRPs from Ara h 2 were more potent in inhibiting IgE binding than Ara h 1 and Ara 3. Ara h 1 and Ara h 3 exhibited sequential digestion into a series of digestion-resistant peptides with preserved allergenic capacity. A high number of identified SDRPs from Ara h 1, Ara h 2 and Ara h 3 were part of short continuous epitope sequences and possessed substantial allergenic potential. Conclusion and Clinical Relevance: Peanut grain digestion by oral and gastric phase enzymes generates mixture of products, where the major peanut allergens remain intact and their digested peptides have preserved allergenic capacity highlighting their important roles in allergic reactions to peanut.",
publisher = "Blackwell Publishing Ltd",
journal = "Clinical and Experimental Allergy",
title = "Influence of peanut matrix on stability of allergens in gastric-simulated digesta: 2S albumins are main contributors to the IgE reactivity of short digestion-resistant peptides",
pages = "740-731",
number = "6",
volume = "48",
doi = "10.1111/cea.13113"
}
Prodić, I., Stanić-Vučinić, D., Apostolović, D., Mihailović, J., Radibratović, M., Radosavljević, J., Burazer, L., Milcić, M., Smiljanić, K., van Hage, M.,& Ćirković-Veličković, T.. (2018). Influence of peanut matrix on stability of allergens in gastric-simulated digesta: 2S albumins are main contributors to the IgE reactivity of short digestion-resistant peptides. in Clinical and Experimental Allergy
Blackwell Publishing Ltd., 48(6), 731-740.
https://doi.org/10.1111/cea.13113
Prodić I, Stanić-Vučinić D, Apostolović D, Mihailović J, Radibratović M, Radosavljević J, Burazer L, Milcić M, Smiljanić K, van Hage M, Ćirković-Veličković T. Influence of peanut matrix on stability of allergens in gastric-simulated digesta: 2S albumins are main contributors to the IgE reactivity of short digestion-resistant peptides. in Clinical and Experimental Allergy. 2018;48(6):731-740.
doi:10.1111/cea.13113 .
Prodić, Ivana, Stanić-Vučinić, Dragana, Apostolović, Danijela, Mihailović, Jelena, Radibratović, M., Radosavljević, Jelena, Burazer, Lidija, Milcić, M., Smiljanić, Katarina, van Hage, Marianne, Ćirković-Veličković, Tanja, "Influence of peanut matrix on stability of allergens in gastric-simulated digesta: 2S albumins are main contributors to the IgE reactivity of short digestion-resistant peptides" in Clinical and Experimental Allergy, 48, no. 6 (2018):731-740,
https://doi.org/10.1111/cea.13113 . .
3
40
24
41

Digestomics of cow's milk: casein-derived digestion-resistant peptides aggregate into functional complexes

Radosavljević, Jelena; Apostolović, Danijela; Mihailović, Jelena; Atanasković-Marković, Marina; Burazer, Lidija; van Hage, Marianne; Ćirković-Veličković, Tanja

(Wiley, Hoboken, 2018)

TY  - CONF
AU  - Radosavljević, Jelena
AU  - Apostolović, Danijela
AU  - Mihailović, Jelena
AU  - Atanasković-Marković, Marina
AU  - Burazer, Lidija
AU  - van Hage, Marianne
AU  - Ćirković-Veličković, Tanja
PY  - 2018
UR  - http://intor.torlakinstitut.com/handle/123456789/504
PB  - Wiley, Hoboken
C3  - FEBS Open Bio
T1  - Digestomics of cow's milk: casein-derived digestion-resistant peptides aggregate into functional complexes
EP  - 257
SP  - 257
VL  - 8
UR  - https://hdl.handle.net/21.15107/rcub_intor_504
ER  - 
@conference{
author = "Radosavljević, Jelena and Apostolović, Danijela and Mihailović, Jelena and Atanasković-Marković, Marina and Burazer, Lidija and van Hage, Marianne and Ćirković-Veličković, Tanja",
year = "2018",
publisher = "Wiley, Hoboken",
journal = "FEBS Open Bio",
title = "Digestomics of cow's milk: casein-derived digestion-resistant peptides aggregate into functional complexes",
pages = "257-257",
volume = "8",
url = "https://hdl.handle.net/21.15107/rcub_intor_504"
}
Radosavljević, J., Apostolović, D., Mihailović, J., Atanasković-Marković, M., Burazer, L., van Hage, M.,& Ćirković-Veličković, T.. (2018). Digestomics of cow's milk: casein-derived digestion-resistant peptides aggregate into functional complexes. in FEBS Open Bio
Wiley, Hoboken., 8, 257-257.
https://hdl.handle.net/21.15107/rcub_intor_504
Radosavljević J, Apostolović D, Mihailović J, Atanasković-Marković M, Burazer L, van Hage M, Ćirković-Veličković T. Digestomics of cow's milk: casein-derived digestion-resistant peptides aggregate into functional complexes. in FEBS Open Bio. 2018;8:257-257.
https://hdl.handle.net/21.15107/rcub_intor_504 .
Radosavljević, Jelena, Apostolović, Danijela, Mihailović, Jelena, Atanasković-Marković, Marina, Burazer, Lidija, van Hage, Marianne, Ćirković-Veličković, Tanja, "Digestomics of cow's milk: casein-derived digestion-resistant peptides aggregate into functional complexes" in FEBS Open Bio, 8 (2018):257-257,
https://hdl.handle.net/21.15107/rcub_intor_504 .

Antioxidative capacity and binding affinity of the complex of green tea catechin and beta-lactoglobulin glycated by the Maillard reaction

Perusko, Marija; Al-Hanish, Ayah; Mihailović, Jelena; Minić, Simeon; Trifunović, Sara; Prodić, Ivana; Cirkovic Velicković, Tanja

(Elsevier Sci Ltd, Oxford, 2017)

TY  - JOUR
AU  - Perusko, Marija
AU  - Al-Hanish, Ayah
AU  - Mihailović, Jelena
AU  - Minić, Simeon
AU  - Trifunović, Sara
AU  - Prodić, Ivana
AU  - Cirkovic Velicković, Tanja
PY  - 2017
UR  - http://intor.torlakinstitut.com/handle/123456789/757
AB  - Major green tea catechin, epigallocatechin-3-gallate (EGCG), binds non-covalently to numerous dietary proteins, including beta-lactoglobulin of cow's milk. The effects of glycation of proteins via Maillard reaction on the binding capacity for polyphenols and the antiradical properties of the formed complexes have not been studied previously. Binding constant of BLG glycated by milk sugar lactose to EGCG was measured by the method of fluorophore quenching. Binding of EGCG was confirmed by CD and FTIR. The antioxidative properties of the complexes were examined by measuring ABTS radical scavenging capacity, superoxide anion scavenging capacity and total reducing power assay. Glycation of BLG does not significantly influence the binding constant of EGCG for the protein. Conformational changes were observed for both native and glycated BLG upon complexation with EGCG. Masking effect of polyphenol complexation on the antioxidative potential of the protein was of the similar degree for both glycated BLG and native BLG.
PB  - Elsevier Sci Ltd, Oxford
T2  - Food Chemistry
T1  - Antioxidative capacity and binding affinity of the complex of green tea catechin and beta-lactoglobulin glycated by the Maillard reaction
EP  - 752
SP  - 744
VL  - 232
DO  - 10.1016/j.foodchem.2017.04.074
ER  - 
@article{
author = "Perusko, Marija and Al-Hanish, Ayah and Mihailović, Jelena and Minić, Simeon and Trifunović, Sara and Prodić, Ivana and Cirkovic Velicković, Tanja",
year = "2017",
abstract = "Major green tea catechin, epigallocatechin-3-gallate (EGCG), binds non-covalently to numerous dietary proteins, including beta-lactoglobulin of cow's milk. The effects of glycation of proteins via Maillard reaction on the binding capacity for polyphenols and the antiradical properties of the formed complexes have not been studied previously. Binding constant of BLG glycated by milk sugar lactose to EGCG was measured by the method of fluorophore quenching. Binding of EGCG was confirmed by CD and FTIR. The antioxidative properties of the complexes were examined by measuring ABTS radical scavenging capacity, superoxide anion scavenging capacity and total reducing power assay. Glycation of BLG does not significantly influence the binding constant of EGCG for the protein. Conformational changes were observed for both native and glycated BLG upon complexation with EGCG. Masking effect of polyphenol complexation on the antioxidative potential of the protein was of the similar degree for both glycated BLG and native BLG.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Food Chemistry",
title = "Antioxidative capacity and binding affinity of the complex of green tea catechin and beta-lactoglobulin glycated by the Maillard reaction",
pages = "752-744",
volume = "232",
doi = "10.1016/j.foodchem.2017.04.074"
}
Perusko, M., Al-Hanish, A., Mihailović, J., Minić, S., Trifunović, S., Prodić, I.,& Cirkovic Velicković, T.. (2017). Antioxidative capacity and binding affinity of the complex of green tea catechin and beta-lactoglobulin glycated by the Maillard reaction. in Food Chemistry
Elsevier Sci Ltd, Oxford., 232, 744-752.
https://doi.org/10.1016/j.foodchem.2017.04.074
Perusko M, Al-Hanish A, Mihailović J, Minić S, Trifunović S, Prodić I, Cirkovic Velicković T. Antioxidative capacity and binding affinity of the complex of green tea catechin and beta-lactoglobulin glycated by the Maillard reaction. in Food Chemistry. 2017;232:744-752.
doi:10.1016/j.foodchem.2017.04.074 .
Perusko, Marija, Al-Hanish, Ayah, Mihailović, Jelena, Minić, Simeon, Trifunović, Sara, Prodić, Ivana, Cirkovic Velicković, Tanja, "Antioxidative capacity and binding affinity of the complex of green tea catechin and beta-lactoglobulin glycated by the Maillard reaction" in Food Chemistry, 232 (2017):744-752,
https://doi.org/10.1016/j.foodchem.2017.04.074 . .
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