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- W2023897728 abstract "Bcl-2 promotes oncogenesis by inhibiting cell death. Bcl-2 also inhibits proliferation and suppresses tumorigenesis in some settings. To clarify the role of the antiproliferative function of Bcl-2, mice expressing a mutant form of Bcl-2 reported to lack antiproliferative activity were generated (tyrosine 28 to alanine, Bcl-2-Y28A). As expected, both wild type (WT) and Bcl-2-Y28A inhibited apoptosis similarly. In contrast to previous results in cell lines, Bcl-2-Y28A inhibited T-cell proliferation identical to WT-Bcl-2. Significantly, both Bcl-2-Y28A and WT-Bcl-2 inhibited proliferation of T cells isolated from older animals, but not proliferation of T cells from immature mice. Instead, inhibition of cell activation correlated with T-cell size, p27 levels, and RNA content, all indicators of quiescent G0 arrest. Consistent with this model, Bcl-2 inhibition of T-cell proliferation was reversed by expression of Bax, again correlating cell proliferation with cell size. These experiments do not support genetically separate effects of Bcl-2 on apoptosis and proliferation. Instead, the data support a model in which Bcl-2 and Bax regulate T-cell proliferation by changes in T-cell size and by increasing the markers of quiescent G0 arrest. These changes likely result from prolonged T-cell survival." @default.
- W2023897728 created "2016-06-24" @default.
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- W2023897728 date "2004-03-22" @default.
- W2023897728 modified "2023-10-18" @default.
- W2023897728 title "Bcl-2 inhibition of T-cell proliferation is related to prolonged T-cell survival" @default.
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- W2023897728 doi "https://doi.org/10.1038/sj.onc.1207478" @default.
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