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Cell Immunol. 1996 Mar 15;168(2):220-8.

Inhibition of apoptosis and augmentation of lymphoproliferation in bcl-2 transgenic Fas/Fas ligand-defective mice.

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Department of Pathology and Laboratory Medicine, University of Pennsylvania School of Medicine, Philadelphia 19104, USA.


Mice defective in Fas (CD95 or APO-1) or its ligand (lpr or gld mice) develop age-dependent lymphadenopathy and systemic autoimmune disease. T cells accumulating in the lymph nodes of these mice express reduced levels of Bcl-2 protein and are susceptible to spontaneous and glucocorticoid-induced apoptosis. We backcrossed bcl-2 transgenic mice to lpr and gld mice to homozygosity to determine the effects of Bcl-2 overexpression. T cells in these mice were resistant to spontaneous and glucocorticoid-induced apoptosis in vitro. Moreover, the accumulation of CD4(-)CD8(-) T cells in the lymph nodes and the spleens was augmented, suggesting that a Bcl-2-dependent mechanism regulating the number of T cells residing in the peripheral lymphoid organs in addition to the Fas-mediated pathway exists.

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