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- W2414317288 abstract "To elucidate the mechanism by which bcl-2 affects apoptosis in post-thymic T cells, we investigated the expression of Bcl-2 protein in primary cultures of splenic T cells and in the interleukin-2 (IL-2)-dependent T-cell line CTLL-2. The overall level of Bcl-2 was determined by immunoblotting, and the variability in Bcl-2 expression was determined by flow cytometry. For a few days after concanavalin A (Con A) plus IL-2 activation, the overall level of Bcl-2 in T cells remains unchanged, but it becomes more heterogeneous. By 5 days after activation, the expression returns to a more homogeneous distribution, but it is increased up to threefold above pre-activation levels, depending upon the dose of IL-2 supplied. When Con A blasts or CTLL-2 cells are deprived of IL-2 for 24 hr, there is no change in their overall Bcl-2 levels which remain homogeneous even though almost half of the cells are apoptotic. However, when bcl-2 transfected CTLL-2 cells are deprived of IL-2, they do not undergo apoptosis, and their endogenous Bcl-2 protein level slowly decreases relative to their total protein. These data document the IL-2-dependent expression of Bcl-2 in activated T cells, confirm the ability of deregulated bcl-2 to inhibit the onset of apoptosis after IL-2 withdrawal, but suggest that, after IL-2 withdrawal, a drop in Bcl-2 levels relative to total protein levels does not precede apoptosis." @default.
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- W2414317288 date "1995-03-01" @default.
- W2414317288 modified "2023-09-24" @default.
- W2414317288 title "Apoptosis and Bcl-2 expression in cultured murine splenic T cells." @default.
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