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- W2036693579 abstract "The selective sensitivity of cells to programmed cell death (PCD) depends on the positive and negative death-inducing signals that converge into the apoptotic pathway. In Drosophila , the midline glial (MG) cells undergo selective death during development. Here, we show that the long isoform of the RNA-binding protein Held Out Wing (HOW(L)) is essential for enhancing the sensitivity of the MG cells to PCD. In how mutant embryos, the number of MG cells was elevated. This phenotype could be rescued by midline expression of the HOW(L) repressor isoform. In how mutant embryos, the levels of the caspase inhibitor of apoptosis, Diap1 were elevated, in parallel to reduction in the levels of activated caspase. Similarly, reducing the levels of HOW in S2 cells led to elevation of Diap1, whereas over expression of HOW(L) promoted reduction of Diap1 protein as well as mRNA levels. Importantly, deletion of the two HOW binding sites from diap1 3′UTR abrogated HOW-dependent repression of Diap1, suggesting that HOW represses diap1 by binding to its 3′UTR. These results suggest that HOW(L) enhances the sensitivity of MG cells to apoptotic signals by reducing the levels of diap1 in these cells in, demonstrating a novel mode of regulation of PCD at the mRNA level." @default.
- W2036693579 created "2016-06-24" @default.
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- W2036693579 date "2009-01-01" @default.
- W2036693579 modified "2023-10-16" @default.
- W2036693579 title "Enhanced sensitivity of midline glial cells to apoptosis is achieved by HOW(L)-dependent repression of Diap1" @default.
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- W2036693579 doi "https://doi.org/10.1016/j.mod.2008.10.004" @default.
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