Lysyl oxidase inhibition enhances browning of white adipose tissue and adaptive thermogenesis.

Lysyl oxidase inhibition enhances browning of white adipose tissue and adaptive thermogenesis.
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赖氨酰氧化酶抑制增强白色脂肪组织的褐变和适应性产热

DOI:
10.1016/j.gendis.2020.10.001
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发表时间:
2022-01
期刊:
影响因子:
6.8
通讯作者:
Huang H
Huang H
中科院分区:
医学2区
文献类型:
--
作者:
Xing C;Jiang D;Liu Y;Tang Q;Huang H

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从动物和人类研究中积累的证据表明,米色脂肪的激活增加了细胞的能量消耗,最终减少肥胖。在这里,我们报告的核心作用,脂肪细胞来源的赖氨酰氧化酶(Lox)在形成产热米色脂肪。暴露于寒冷或β3激动剂的小鼠在生热活化的米色脂肪中显示出显著降低的Lox表达。重要的是,用BAPN抑制Lox活性刺激了在饲养条件下腹股沟白色脂肪组织(iWAT)中米色脂肪的生物合成,并增强了iWAT和附睾白色脂肪组织(eWAT)中冷诱导的适应性产热和米色化。值得注意的是,具有Lox抑制的白色脂肪细胞经历转分化为米色脂肪细胞,其可以通过ERK活化被肿瘤坏死因子-α(TNFα)抑制。这项工作提供了新的见解,分子控制扩大米色脂肪的Lox抑制剂,并建议利用Lox抑制剂治疗肥胖和糖尿病的新兴流行病的潜力。
Accumulating evidence from both animal and human studies suggests that activation of beige fat increases cellular energy expenditure, ultimately reducing adiposity. Here, we report the central role of adipocyte-derived lysyl oxidase (Lox) in the formation of thermogenic beige fat. Mice exposed to cold or a β3 agonist showed drastically lower Lox expression in thermogenically activated beige fat. Importantly, inhibition of Lox activity with BAPN stimulated biogenesis of beige fat in inguinal white adipose tissue (iWAT) under housing conditions and potentiated cold-induced adaptive thermogenesis and beiging in both iWAT and epididymal white adipose tissue (eWAT). Notably, white adipocytes with Lox repression undergo transdifferentiation into beige adipocytes which can be suppressed by tumor necrosis factor-α (TNFα) via ERK activation. This work provides new insight into the molecular control to expand beige fat by Lox inhibition and suggest the potential for utilizing inhibitor of Lox to treat the emerging epidemics of obesity and diabetes.
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