Akt与β细胞生存和功能
摘要
Akt是在多种组织和细胞表达的一种丝氨酸/苏氨酸激酶,接受磷脂酰肌醇3激酶-Akt-磷酸肌醇依赖性激酶信号通路调节而发生构象变化,显露其磷酸化位点而被激活。研究发现,胰岛中Akt主要表达于β细胞,一方面通过其下游效应子核糖体S6激酶1和细胞周期素依赖激酶/细胞周期素的调节,以及阻断细胞凋亡信号通路来促进β细胞的生存、增殖和分化;另一方面通过调节胰岛素分泌通路末梢的信号分子和葡萄糖代谢等促进β细胞正常功能的维持。因而可能为糖尿病的治疗提供一个新的靶点。
出处
《国外医学(内分泌学分册)》
2005年第6期411-413,共3页
Foreign Medical Sciences(Section of Endocrinology)
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