The skinny on fat: lipolysis and fatty acid utilization in adipocytes.

The skinny on fat: lipolysis and fatty acid utilization in adipocytes.
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DOI:
10.1016/j.tem.2009.06.002
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发表时间:
2009-11
影响因子:
10.9
通讯作者:
Sul, Hei Sook
Sul, Hei Sook
中科院分区:
医学1区
文献类型:
--
作者:
Ahmadian, Maryam;Duncan, Robin E.;Sul, Hei Sook

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在能量需求期间为其他器官提供脂肪酸(FA)的脂解作用仅发生在白色脂肪组织(WAT)中。最近的研究结果已经确定了真正的TAG水解酶以及主要的脂肪磷脂酶A2,AdPLA。通过控制PGE 2水平,AdPLA主要以自分泌/旁分泌方式调节脂解。此外,最近的研究结果表明,令人惊讶的是,增加脂肪组织中的脂解不一定会增加血清FA水平,这通常与胰岛素抵抗相关。相反,增加脂肪组织中的脂解导致脂肪细胞内向增加的FA利用和能量消耗转变,从而防止肥胖。在这里,我们讨论了脂肪分解的调节及其对WAT内FA利用率和胰岛素抵抗的影响。
Lipolysis for the provision of fatty acids (FA) for other organs during times of energy demand occurs uniquely in white adipose tissue (WAT). Recent findings have identified a bona fide TAG hydrolase as well as the major adipose phospholipase A2, AdPLA. By controlling PGE2 levels, AdPLA dominantly regulates lipolysis in an autocrine/paracrine manner. Moreover, recent findings demonstrate that, surprisingly, increasing lipolysis in adipose tissue does not necessarily increase serum FA levels, which are usually correlated with insulin resistance. Rather, increasing lipolysis in adipose tissue causes a shift within adipocytes towards increased FA utilization and energy expenditure and, thus, protects against obesity. Here, we discuss the regulation of lipolysis and its effects on FA utilization within WAT and on insulin resistance.
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