Induction of Apoptosis in Thymocytes by Prostaglandin E2 In Vivo
Author(s) -
Antonio Mastino,
Mauro Piacentini,
Sandro Grelli,
Cartesio Favalli,
Francesco Autuori,
Lucio Tentori,
Serafina Oliverio,
Enrico Garach
Publication year - 1992
Publication title -
journal of immunology research
Language(s) - English
Resource type - Journals
eISSN - 2314-8861
pISSN - 2314-7156
DOI - 10.1155/1992/80863
Subject(s) - cd8 , prostaglandin e2 , apoptosis , in vivo , intracellular , microbiology and biotechnology , biology , endogeny , tissue transglutaminase , thymocyte , receptor , cd3 , prostaglandin , t cell receptor , t cell , endocrinology , medicine , immunology , immune system , biochemistry , enzyme , genetics
In vivo administration in mice of a synthetic analog of prostaglandin E2 (PGE2) caused a selective and dramatic decrease of CD4+CD8+ double-positive, CD3/T-cell-receptor-alpha beta(lo) cells in the thymus. This loss was corticosteroid-independent and not affected by Cyclosporin A. The disappearance of CD4+CD8+ thymocytes was strictly correlated with the induction of apoptosis inside the thymus as shown by morphological studies and by the induction of intracellular transglutaminase expression. Considering that PGE2 has been found to be produced by different cell populations inside the thymus, these results indicate that PGE2 may act as endogenous signals for apoptosis during T-cell differentiation.
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