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- W3009131999 abstract "Our previous study demonstrated that cadmium (Cd) is an effective inducer of mitophagy, which is mainly mediated by PINK1/Parkin pathway. However, the role of other mitophagy pathways in Cd-induced mitophagy remains elusive. The present study employed HeLa cells, lacking fully functional Parkin, as a cell model to study Parkin-independent mitophagy pathway induced by Cd. Our results showed that BCL2/adenovirus E1B 19 kDa protein-interacting protein 3-like (Bnip3L/NIX), an outer mitochondrial membrane mitophagy receptor, could provide an alternate pathway for Cd-induced mitophagy in HeLa cells. Specifically, 10 μM Cd for 12 h induced mitophagy in GM00637 and HeLa cells which was assessed by mitochondrial fusion to lysosomes and decreased expression of mitochondrial markers such as COX-IV and HSP60. Notably, in GM00637 cells, Cd-induced mitophagy was predominantly mediated by PINK1/Parkin pathway as evinced by translocation of Parkin to mitochondria. Interestingly, in HeLa cells, significant increase in NIX expression was occurred and mitophagy was induced under Cd exposure, suggesting NIX compensates lost role of Parkin in Cd-induced mitophagy in HeLa cells. These results were verified by knocking down NIX using siRNA in HeLa cells, which lead to abolished mitophagy process. Moreover, NIX phosphorylation at serine-81 significantly increased in cells treated with Cd implying that phosphorylation of NIX plays an important role in NIX-mediated mitophagy. These findings reveal a novel mechanism of Cd toxicity and suggest a compensatory role of NIX in Cd-induced mitophagy." @default.
- W3009131999 created "2020-03-13" @default.
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- W3009131999 date "2020-06-01" @default.
- W3009131999 modified "2023-10-16" @default.
- W3009131999 title "NIX compensates lost role of parkin in cd-induced mitophagy in HeLa cells through phosphorylation" @default.
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- W3009131999 doi "https://doi.org/10.1016/j.toxlet.2020.03.001" @default.
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