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Characterization of thymocyte phenotypic alterations induced by long-lasting beta-adrenoceptor blockade in vivo and its effects on thymocyte proliferation and apoptosis

Authorized Users Only
2006
Authors
Leposavić, Gordana
Arsenović-Ranin, Nevena
Radojević, Katarina
Kosec, Duško
Pešić, Vesna
Vidić-Danković, Biljana
Plećaš-Solarović, Bosiljka
Pilipović, Ivan
Article (Published version)
Metadata
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Abstract
Adult male Wistar rats were subjected to propranolol (P, 0.40 mg/100 g/day) or saline (S) administration (controls) over 14 days. The expression of major differentiation molecules on thymocytes and Thy-1 (CD90) molecules, which are shown to adjust thymocyte sensitivity to TCR alpha beta signaling, was studied. In addition, the sensitivity of thymocytes to induction of apoptosis and concanavalin A (Con A) signaling was estimated. The thymocytes from P-treated (PT) rats exhibited an increased sensitivity to induction of apoptosis, as well as to Con A stimulation. Furthermore, P treatment produced changes in the distribution of thymocyte subsets suggesting that more cells passed positive selection and further differentiated into mature CD4+ or CD8+ single positive (SP) TCR alpha beta(high) cells. These changes may, at least partly, be related to the markedly increased density of Thy-1 surface expression on TCR alpha beta(low) thymocytes from these rats. The increased frequency of cells ex...pressing the CD4+25+ phenotype, which has been shown to be characteristic for regulatory cells in the thymus, may also indicate alterations in thymocyte selection following P treatment. Inasmuch as positive and negative selections play an important role in continuously reshaping the T-cell repertoire and maintaining tolerance, the hereby presented study suggests that pharmacological manipulations with beta-AR signaling, or chemically evoked alterations in catecholamine release, may interfere with the regulation of thymocyte selection, and consequently with the immune response.

Keywords:
beta-adrenoceptor blockade / CD90 expression / Con A / T-cell differentiation / thymocyte apoptosis / thymocyte proliferation
Source:
Molecular and Cellular Biochemistry, 2006, 285, 1-2, 87-99
Publisher:
  • Springer, Dordrecht

DOI: 10.1007/s11010-005-9059-5

ISSN: 0300-8177

PubMed: 16477376

WoS: 000238521100009

Scopus: 2-s2.0-33646152757
[ Google Scholar ]
19
19
URI
http://intor.torlakinstitut.com/handle/123456789/208
Collections
  • Radovi istraživača / Researchers’ publications
Institution/Community
Torlak
TY  - JOUR
AU  - Leposavić, Gordana
AU  - Arsenović-Ranin, Nevena
AU  - Radojević, Katarina
AU  - Kosec, Duško
AU  - Pešić, Vesna
AU  - Vidić-Danković, Biljana
AU  - Plećaš-Solarović, Bosiljka
AU  - Pilipović, Ivan
PY  - 2006
UR  - http://intor.torlakinstitut.com/handle/123456789/208
AB  - Adult male Wistar rats were subjected to propranolol (P, 0.40 mg/100 g/day) or saline (S) administration (controls) over 14 days. The expression of major differentiation molecules on thymocytes and Thy-1 (CD90) molecules, which are shown to adjust thymocyte sensitivity to TCR alpha beta signaling, was studied. In addition, the sensitivity of thymocytes to induction of apoptosis and concanavalin A (Con A) signaling was estimated. The thymocytes from P-treated (PT) rats exhibited an increased sensitivity to induction of apoptosis, as well as to Con A stimulation. Furthermore, P treatment produced changes in the distribution of thymocyte subsets suggesting that more cells passed positive selection and further differentiated into mature CD4+ or CD8+ single positive (SP) TCR alpha beta(high) cells. These changes may, at least partly, be related to the markedly increased density of Thy-1 surface expression on TCR alpha beta(low) thymocytes from these rats. The increased frequency of cells expressing the CD4+25+ phenotype, which has been shown to be characteristic for regulatory cells in the thymus, may also indicate alterations in thymocyte selection following P treatment. Inasmuch as positive and negative selections play an important role in continuously reshaping the T-cell repertoire and maintaining tolerance, the hereby presented study suggests that pharmacological manipulations with beta-AR signaling, or chemically evoked alterations in catecholamine release, may interfere with the regulation of thymocyte selection, and consequently with the immune response.
PB  - Springer, Dordrecht
T2  - Molecular and Cellular Biochemistry
T1  - Characterization of thymocyte phenotypic alterations induced by long-lasting beta-adrenoceptor blockade in vivo and its effects on thymocyte proliferation and apoptosis
EP  - 99
IS  - 1-2
SP  - 87
VL  - 285
DO  - 10.1007/s11010-005-9059-5
UR  - conv_179
ER  - 
@article{
author = "Leposavić, Gordana and Arsenović-Ranin, Nevena and Radojević, Katarina and Kosec, Duško and Pešić, Vesna and Vidić-Danković, Biljana and Plećaš-Solarović, Bosiljka and Pilipović, Ivan",
year = "2006",
abstract = "Adult male Wistar rats were subjected to propranolol (P, 0.40 mg/100 g/day) or saline (S) administration (controls) over 14 days. The expression of major differentiation molecules on thymocytes and Thy-1 (CD90) molecules, which are shown to adjust thymocyte sensitivity to TCR alpha beta signaling, was studied. In addition, the sensitivity of thymocytes to induction of apoptosis and concanavalin A (Con A) signaling was estimated. The thymocytes from P-treated (PT) rats exhibited an increased sensitivity to induction of apoptosis, as well as to Con A stimulation. Furthermore, P treatment produced changes in the distribution of thymocyte subsets suggesting that more cells passed positive selection and further differentiated into mature CD4+ or CD8+ single positive (SP) TCR alpha beta(high) cells. These changes may, at least partly, be related to the markedly increased density of Thy-1 surface expression on TCR alpha beta(low) thymocytes from these rats. The increased frequency of cells expressing the CD4+25+ phenotype, which has been shown to be characteristic for regulatory cells in the thymus, may also indicate alterations in thymocyte selection following P treatment. Inasmuch as positive and negative selections play an important role in continuously reshaping the T-cell repertoire and maintaining tolerance, the hereby presented study suggests that pharmacological manipulations with beta-AR signaling, or chemically evoked alterations in catecholamine release, may interfere with the regulation of thymocyte selection, and consequently with the immune response.",
publisher = "Springer, Dordrecht",
journal = "Molecular and Cellular Biochemistry",
title = "Characterization of thymocyte phenotypic alterations induced by long-lasting beta-adrenoceptor blockade in vivo and its effects on thymocyte proliferation and apoptosis",
pages = "99-87",
number = "1-2",
volume = "285",
doi = "10.1007/s11010-005-9059-5",
url = "conv_179"
}
Leposavić, G., Arsenović-Ranin, N., Radojević, K., Kosec, D., Pešić, V., Vidić-Danković, B., Plećaš-Solarović, B.,& Pilipović, I.. (2006). Characterization of thymocyte phenotypic alterations induced by long-lasting beta-adrenoceptor blockade in vivo and its effects on thymocyte proliferation and apoptosis. in Molecular and Cellular Biochemistry
Springer, Dordrecht., 285(1-2), 87-99.
https://doi.org/10.1007/s11010-005-9059-5
conv_179
Leposavić G, Arsenović-Ranin N, Radojević K, Kosec D, Pešić V, Vidić-Danković B, Plećaš-Solarović B, Pilipović I. Characterization of thymocyte phenotypic alterations induced by long-lasting beta-adrenoceptor blockade in vivo and its effects on thymocyte proliferation and apoptosis. in Molecular and Cellular Biochemistry. 2006;285(1-2):87-99.
doi:10.1007/s11010-005-9059-5
conv_179 .
Leposavić, Gordana, Arsenović-Ranin, Nevena, Radojević, Katarina, Kosec, Duško, Pešić, Vesna, Vidić-Danković, Biljana, Plećaš-Solarović, Bosiljka, Pilipović, Ivan, "Characterization of thymocyte phenotypic alterations induced by long-lasting beta-adrenoceptor blockade in vivo and its effects on thymocyte proliferation and apoptosis" in Molecular and Cellular Biochemistry, 285, no. 1-2 (2006):87-99,
https://doi.org/10.1007/s11010-005-9059-5 .,
conv_179 .

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