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- W2023779098 abstract "Inositide-specific phospholipase Cbeta1 (PLCbeta1) signaling in cell proliferation has been investigated thoroughly in the G(1) cell cycle phase. However, little is known about its involvement in G(2)/M progression. We used murine erythroleukemia cells to investigate the role of PLCbeta1 in G(2)/M cell cycle progression and screened a number of candidate intermediate players, particularly mitogen-activated protein kinase (MAPK) and protein kinase C (PKC), which can, potentially, transduce serum mitogenic stimulus and induce lamin B1 phosphorylation, leading to G(2)/M progression. We report that PLCbeta1 colocalizes and physically interacts with lamin B1. Studies of the effects of inhibitors and selective si-RNA mediated silencing showed a role of JNK, PKCalpha, PKCbetaI, and the beta1 isoform of PI-PLC in cell accumulation in G(2)/M [as observed by fluorescence-activated cell sorter (FACS)]. To shed light on the mechanism, we considered that the final signaling target was lamin B1 phosphorylation. When JNK, PKCalpha, or PLCbeta1 were silenced, lamin B1 exhibited a lower extent of phosphorylation, as compared to control. The salient features to emerge from these studies are a common pathway in which JNK is likely to represent a link between mitogenic stimulus and activation of PLCbeta1, and, foremost, the finding that the PLCbeta1-mediated pathway represents a functional nuclear inositide signaling in the G(2)/M transition." @default.
- W2023779098 created "2016-06-24" @default.
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- W2023779098 date "2008-11-21" @default.
- W2023779098 modified "2023-10-12" @default.
- W2023779098 title "Involvement of nuclear PLCβl in lamin B1 phosphorylation and G<sub>2</sub>/M cell cycle progression" @default.
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- W2023779098 doi "https://doi.org/10.1096/fj.08-121244" @default.
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