Oxford Centre for Diabetes, Endocrinology and Metabolism, University of Oxford, Oxford, UK.
Int J Obes (Lond). 2010 Jun;34(6):949-59. doi: 10.1038/ijo.2009.286. Epub 2010 Jan 12.
Body fat distribution is an important metabolic and cardiovascular risk factor, because the proportion of abdominal to gluteofemoral body fat correlates with obesity-associated diseases and mortality. Here, we review the evidence and possible mechanisms that support a specific protective role of gluteofemoral body fat. Population studies show that an increased gluteofemoral fat mass is independently associated with a protective lipid and glucose profile, as well as a decrease in cardiovascular and metabolic risk. Studies of adipose tissue physiology in vitro and in vivo confirm distinct properties of the gluteofemoral fat depot with regards to lipolysis and fatty acid uptake: in day-to-day metabolism it appears to be more passive than the abdominal depot and it exerts its protective properties by long-term fatty acid storage. Further, a beneficial adipokine profile is associated with gluteofemoral fat. Leptin and adiponectin levels are positively associated with gluteofemoral fat while the level of inflammatory cytokines is negatively associated. Finally, loss of gluteofemoral fat, as observed in Cushing's syndrome and lipodystrophy is associated with an increased metabolic and cardiovascular risk. This underlines gluteofemoral fat's role as a determinant of health by the long-term entrapment of excess fatty acids, thus protecting from the adverse effects associated with ectopic fat deposition.
体脂分布是一个重要的代谢和心血管危险因素,因为腹部和臀部脂肪的比例与肥胖相关疾病和死亡率相关。在这里,我们回顾了支持臀部脂肪具有特定保护作用的证据和可能机制。人群研究表明,臀部脂肪量的增加与保护性的脂质和葡萄糖谱以及心血管和代谢风险的降低独立相关。体外和体内脂肪组织生理学研究证实了臀部脂肪库在脂肪分解和脂肪酸摄取方面具有独特的特性:在日常代谢中,它似乎比腹部脂肪库更为被动,通过长期储存脂肪酸来发挥其保护作用。此外,有益的脂肪因子谱与臀部脂肪有关。瘦素和脂联素水平与臀部脂肪呈正相关,而炎症细胞因子的水平则呈负相关。最后,库欣综合征和脂肪营养不良中观察到的臀部脂肪丧失与代谢和心血管风险增加有关。这强调了臀部脂肪通过长期捕获多余脂肪酸作为健康决定因素的作用,从而保护免受与异位脂肪沉积相关的不良影响。