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- W3162192471 abstract "ABSTRACT Gliomas are highly malignant brain tumors with poor prognosis and short survival. NAD + has been shown to impact multiple processes that are dysregulated in cancer; however, anti-cancer therapies targeting NAD + synthesis have been unsuccessful due to insufficient mechanistic understanding. Here we adapted a Drosophila glial neoplasia model and discovered the genetic requirement for NAD + synthase nicotinamide mononucleotide adenylyltransferase (NMNAT) in glioma progression in vivo and in human glioma cells. Overexpressing enzymatically active NMNAT significantly promotes glial neoplasia growth and reduces animal viability. Mechanistic analysis suggests that NMNAT interferes with DNA damage-p53-caspase-3 apoptosis signaling pathway by enhancing NAD + -dependent posttranslational modifications (PTMs) poly(ADP-ribosyl)ation (PARylation) and deacetylation of p53. Interestingly, NMNAT forms a complex with p53 and PTM enzyme PARP1 to facilitate PARylation. As PARylation and deacetylation reduce p53 pro-apoptotic activity, our results demonstrate that NMNAT promotes glioma progression through regulating p53 post-translational modifications. Our findings reveal a novel tumorigenic mechanism involving protein complex formation of p53 with NAD + synthetic enzyme NMNAT and NAD + -dependent PTM enzymes that regulates glioma growth." @default.
- W3162192471 created "2021-05-24" @default.
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- W3162192471 date "2021-05-13" @default.
- W3162192471 modified "2023-10-16" @default.
- W3162192471 title "NMNAT promotes glioma growth through regulating post-translational modifications of p53 to inhibit apoptosis" @default.
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- W3162192471 doi "https://doi.org/10.1101/2021.05.12.443736" @default.
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