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JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
P-body-induced inactivation of let-7a miRNP prevents the death of growth factor-deprived neuronal cells.
RNA processing bodies (P-bodies) are cytoplasmic RNA granules in eukaryotic cells that regulate gene expression by executing the translation suppression and degradation of mRNAs that are targeted to these bodies. P-bodies can also serve as storage sites for translationally repressed mRNAs both in mammalian cells and yeast cells. In this report, a unique role of mammalian P-bodies is documented. Depletion of P-body components dedifferentiate nerve growth factor-treated PC12 cells, whereas ectopic expression of P-body components induces the neuronal differentiation of precursor cells. Trophic factor withdrawal from differentiated cells induces a decrease in cellular P-body size and numbers that are coupled with dedifferentiation and cell death. Here, we report how the expression of P-body proteins-by ensuring the phosphorylation of argonaute protein 2 and the subsequent inactivation let-7a miRNPs-prevents the apoptotic death of growth factor-depleted neuronal cells.-Patranabis, S., Bhattacharyya, S. N. P-body-induced inactivation of let-7a miRNP prevents the death of growth factor-deprived neuronal cells.
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