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- W4313373778 abstract "Abstract High mobility group box 1 (HMGB1) is an infamous alarmin which is known to be harmful to pancreatic beta cells and associated with diabetes mellitus pathogenesis and pancreatic islet graft failure. However, recent studies have indicated that cytosolic HMGB1 could function as a modulator to relieve cells from apoptotic stress by inducing autophagy. Particularly, pancreatic beta cells have been well-known to demonstrate the apoptosis to autophagy switch when exposed to hypoxia or lipoxiticy. In this study, we have investigated the beta cells under hypoxic and lipotoxic stress with CCK8 assay and flow cytometry while utilizing a small molecule inhibitor of HMGB1 which can suppress the cytosolic accumulation of HMGB1. The results demonstrated that the cytoplasmic HMGB1 blockade decreased the viability of mouse beta cell line MIN6 and primary islets. Moreover, the cytoplasmic HMGB1 blockade decreased the autophagic flux and increased the ratio of apoptotic MIN6 cells. Also, it was noteworthy that the MIN6 cells have shown high autophagic flux even in basal state. We believe this study linked the role of cytoplasmic HMGB1 in apoptosis to autophagy switch and the importance of autophagy in beta cells under apoptotic stress. We expect this study to open up a novel field of HMGB1 utilization within diabetes- and islet transplantation-related therapeutics, where the current field is mainly focused on the exhaustive blockade of HMGB1." @default.
- W4313373778 created "2023-01-06" @default.
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- W4313373778 date "2020-05-01" @default.
- W4313373778 modified "2023-09-27" @default.
- W4313373778 title "The alarmin HMGB1 in cell cytoplasm can modulate the apoptosis to autophagy switch of pancreatic beta cells under stress" @default.
- W4313373778 doi "https://doi.org/10.4049/jimmunol.204.supp.161.28" @default.
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