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Neonatal castration affects intrathymic kinetics of T-cell differentiation and the spleen T-cell level

Samo za registrovane korisnike
2007
Autori
Radojević, Katarina
Arsenović-Ranin, Nevena
Kosec, Duško
Pešić, V.
Pilipović, Ivan
Perišić, M.
Plećaš-Solarović, Bosiljka
Leposavić, Gordana
Članak u časopisu (Objavljena verzija)
Metapodaci
Prikaz svih podataka o dokumentu
Apstrakt
To test putative interdependence in the ontogenesis of the hypothalamic-pituitary-gonadal and thymic-lymphatic axes, thymocyte differentiation and maturation was examined in neonatally castrated (Cx) adult rats. In the hypercellular thymi of Cx rats, the proportion of the least mature CD4(-)CD8(-)TCR alpha beta(-) triple negative (TN) thymocytes was reduced, while the proportions of all downstream double positive (DP) subsets (TCR alpha beta(-), TCR alpha beta(low) and TCR alpha beta(high)) were increased when compared with neonatally sham-castrated (Sx) adult rats. This suggested an accelerated thymocyte transition from the TN to DP TCR alpha beta(low) developmental stage accompanied by an increased positive/reduced negative thymocyte selection. The increased thymocyte surface density of Thy-1, which is implicated in thymocyte hyposensitivity to negative selection, in Cx rats further supports the previous assumption. The finding that the proportions of both single positive (SP) TCR al...pha beta(high) thymocyte subsets were reduced, while their numbers were increased (CD4(+)CD8(-)) or unaltered (CD4(-)CD8(+)), coupled with results demonstrating an increased level of CD4(-)CD8(+) cells without changes in that of CD4(+) 8(-) cells in the spleen indicate: (i) accelerated differentiation and maturation of the positively selected DP TCR alpha beta(high) thymocytes towards CD4(-)8(+) TCR alpha beta(high) cells followed by increased emigration of the mature cells and (ii) decelerated hi h differentiation and maturation towards CD4(+)8(-) TCR alpha beta(high) cells in Cx rats. Furthermore, the unaltered proportion of intrathymically developing CD4(+)CD25(+)Foxp3(+) regulatory cells in Cx rats, in light of putative hyposensitivity of thymocytes to negative selection suggesting reduced elimination of autoreactive cells, may provide a firm basis for understanding the reasons behind increased susceptibility of Cx rats to autoimmune disease induction.

Izvor:
Journal of Endocrinology, 2007, 192, 3, 669-682
Izdavač:
  • Bioscientifica Ltd, Bristol
Projekti:
  • Neuroendokrina modulacija imunskog odgovora: uloga simpato-adrenomedularnog sistema (RS-145049)

DOI: 10.1677/joe.1.07019

ISSN: 0022-0795

PubMed: 17332534

WoS: 000245123100019

Scopus: 2-s2.0-33947399305
[ Google Scholar ]
19
20
URI
http://farfar.pharmacy.bg.ac.rs/handle/123456789/957
Kolekcije
  • Radovi istraživača / Researchers’ publications
Institucija
Pharmacy

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