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- W4319983334 abstract "Abstract High‐altitude hypoxia may disturb the metabolic modulation and function of both adipose tissue and liver. The endoplasmic reticulum (ER) is a crucial organelle in lipid metabolism and ER stress is closely correlated with lipid metabolism dysfunction. The aim of this study is to elucidate whether the inhibition of ER stress could alleviate hypoxia‐induced white adipose tissue (WAT) lipolysis and liver lipid accumulation‐mediated hepatic injury. A rat model of high‐altitude hypoxia (5500 m) was established using hypobaric chamber. The response of ER stress and lipolysis‐related pathways were analyzed in WAT under hypoxia exposure with or without 4‐phenylbutyric acid (PBA) treatment. Liver lipid accumulation, liver injury, and apoptosis were evaluated. Hypoxia evoked significant ER stress in WAT, evidenced by increased GRP78, CHOP, and phosphorylation of IRE1α, PERK. Moreover, Lipolysis in perirenal WAT significantly increased under hypoxia, accompanied with increased phosphorylation of hormone‐sensitive lipase (HSL) and perilipin. Treatment with 4‐PBA, inhibitor of ER stress, effectively attenuated hypoxia‐induced lipolysis via cAMP‐PKA‐HSL/perilipin pathway. In addition, 4‐PBA treatment significantly inhibited the increase in fatty acid transporters (CD36, FABP1, FABP4) and ameliorated liver FFA accumulation. 4‐PBA treatment significantly attenuated liver injury and apoptosis, which is likely resulting from decreased liver lipid accumulation. Our results highlight the importance of ER stress in hypoxia‐induced WAT lipolysis and liver lipid accumulation." @default.
- W4319983334 created "2023-02-11" @default.
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- W4319983334 date "2023-02-09" @default.
- W4319983334 modified "2023-10-05" @default.
- W4319983334 title "<scp>4‐PBA</scp> inhibits hypoxia‐induced lipolysis in rat adipose tissue and lipid accumulation in the liver through regulating <scp>ER</scp> stress" @default.
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- W4319983334 doi "https://doi.org/10.1002/fsn3.3156" @default.
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