Newman John C, Verdin Eric
Division of Geriatrics, University of California San Francisco, San Francisco, CA, USA; Gladstone Institutes, University of California San Francisco, 1650 Owens St., San Francisco, CA 94158, USA.
Gladstone Institutes, University of California San Francisco, 1650 Owens St., San Francisco, CA 94158, USA.
Diabetes Res Clin Pract. 2014 Nov;106(2):173-81. doi: 10.1016/j.diabres.2014.08.009. Epub 2014 Aug 19.
The ketone body β-hydroxybutyrate (βOHB) is a convenient carrier of energy from adipocytes to peripheral tissues during fasting or exercise. However, βOHB is more than just a metabolite, having important cellular signaling roles as well. βOHB is an endogenous inhibitor of histone deacetylases (HDACs) and a ligand for at least two cell surface receptors. In addition, the downstream products of βOHB metabolism including acetyl-CoA, succinyl-CoA, and NAD+ (nicotinamide adenine dinucleotide) themselves have signaling activities. These regulatory functions of βOHB serve to link the outside environment to cellular function and gene expression, and have important implications for the pathogenesis and treatment of metabolic diseases including type 2 diabetes.
酮体β-羟基丁酸酯(βOHB)是禁食或运动期间脂肪细胞向周围组织输送能量的便捷载体。然而,βOHB不仅仅是一种代谢物,它还具有重要的细胞信号传导作用。βOHB是组蛋白脱乙酰基酶(HDACs)的内源性抑制剂,也是至少两种细胞表面受体的配体。此外,βOHB代谢的下游产物,包括乙酰辅酶A、琥珀酰辅酶A和NAD+(烟酰胺腺嘌呤二核苷酸)本身也具有信号传导活性。βOHB的这些调节功能有助于将外部环境与细胞功能和基因表达联系起来,对包括2型糖尿病在内的代谢性疾病的发病机制和治疗具有重要意义。