Santosa Sylvia, Jensen Michael D
Mayo Clinic, Rochester, MN 55905, USA.
Am J Physiol Endocrinol Metab. 2008 Sep;295(3):E531-5. doi: 10.1152/ajpendo.90357.2008. Epub 2008 May 20.
Body fat distribution is an important predictor of metabolic abnormalities in obese humans. Dysregulation of free fatty acid (FFA) release, especially from upper body subcutaneous adipose tissue, appears to contribute substantially to these metabolic disturbances. Why different individuals preferentially store fat in upper vs. lower body subcutaneous fat or subcutaneous vs. visceral fat is not completely understood. Current evidence suggests that defects in regional lipolysis are not the cause of net fat retention in larger fat depots. Regional variations in the storage of fatty acids, both meal derived and direct reuptake, and storage of circulating FFAs that may help to explain why some depots expand at the expense of others have been reported. We review the quantitative data on regional lipolysis, meal, and FFA storage in adults to provide an overview of fat balance differences in adults with different fat distribution patterns.
体脂分布是肥胖人群代谢异常的重要预测指标。游离脂肪酸(FFA)释放失调,尤其是上身皮下脂肪组织的游离脂肪酸释放失调,似乎在很大程度上导致了这些代谢紊乱。为何不同个体优先将脂肪储存于上身皮下脂肪与下身皮下脂肪,或皮下脂肪与内脏脂肪,目前尚未完全明确。现有证据表明,局部脂肪分解缺陷并非较大脂肪库中脂肪净潴留的原因。据报道,脂肪酸储存存在区域差异,包括膳食来源的脂肪酸、直接再摄取的脂肪酸以及循环FFA的储存,这或许有助于解释为何一些脂肪库以牺牲其他脂肪库为代价而扩张。我们回顾了成人局部脂肪分解、膳食及FFA储存的定量数据,以概述不同脂肪分布模式的成人脂肪平衡差异。