Gawecka Alicja, Stachowska Ewa
Ann Acad Med Stetin. 2014;60(2):25-8.
The use of caloric restriction modulates the activity of FoxO proteins. FoxO is a key regulator of changes in the metabolism of carbohydrates. Under the influence of limited access to food FoxO proteins are activated. FOXO activation is done by deacetylation. The enzymes responsible for the deacetylation of proteins are called sirtuins. Sirtuins are NAD-dependent proteins, the activity of which is dependent on the metabolic status of the cell. Deacetylation of FoxO leads to an increase in the potential for increased interaction with DNA. In vivo studies have shown that under the influence of calorie restriction sirtuin levels increase in muscle, brain, kidney, or adipose tissue.
热量限制的使用可调节FoxO蛋白的活性。FoxO是碳水化合物代谢变化的关键调节因子。在食物获取受限的影响下,FoxO蛋白被激活。FOXO的激活是通过去乙酰化实现的。负责蛋白质去乙酰化的酶称为沉默调节蛋白。沉默调节蛋白是依赖NAD的蛋白质,其活性取决于细胞的代谢状态。FoxO的去乙酰化导致与DNA相互作用增加的潜力增强。体内研究表明,在热量限制的影响下,肌肉、大脑、肾脏或脂肪组织中的沉默调节蛋白水平会升高。