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• W2772911988 abstract "PUMA, a BH3-only pro-apoptotic Bcl2 family protein, is known to translocate from the cytosol into the mitochondria in order to induce apoptosis. Interestingly, the induction of PUMA by p53 plays a critical role in DNA damage-induced apoptosis. In this study, we reported mitophagy inducing potential of PUMA triggered by phytolectin Abrus agglutinin (AGG) in U87MG glioblastoma cells and established AGG-induced ceramide acts as the chief mediator of mitophagy dependent cell death through activation of both mitochondrial ROS as well as ER stress. Importantly, AGG upregulates PUMA expression in U87MG cells with the generation of dysfunctional mitochondria, with gain and loss of function of PUMA is shown to alter mitophagy induction. At the molecular level, our study identified that the LC3 interacting region (LIR) located at the C-terminal end of PUMA interacts with LC3 in order to stimulate mitophagy. In addition, AGG is also found to trigger ubiquitination of PUMA which in turn interacted with p62 for prompting mitophagy suggesting that AGG turns on PUMA-mediated mitophagy in U87MG cells in both p62-dependent as well as in p62-independent manner. Interestingly, AGG-triggered ceramide production through activation of ceramide synthase-1 leads to induction of ER stress and ROS accumulation to promote mitochondrial damage as well as mitophagy. Further, upon pre-treatment with Mdivi-1, DRP1 inhibitor, AGG exposure results in suppression of apoptosis in U87MG cells indicating AGG-induced mitophagy switches to apoptosis that can be exploited for better cancer therapeutics." @default.
• W2772911988 created "2017-12-22" @default.
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• W2772911988 date "2018-03-01" @default.
• W2772911988 modified "2023-09-24" @default.
• W2772911988 title "PUMA dependent mitophagy by Abrus agglutinin contributes to apoptosis through ceramide generation" @default.
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• W2772911988 doi "https://doi.org/10.1016/j.bbamcr.2017.12.002" @default.
• W2772911988 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/29229477" @default.
• W2772911988 hasPublicationYear "2018" @default.
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