EPAS1和EGLN1mRNA表达的下调与Sherpa高地牧羊人的高海拔适应性遗传变异相关
Yunden Droma1, Fengming Yue2, Masao Ota3
1First Department of Medicine, Shinshu University School of Medicine, Matsumoto, Japan.
Annals of human genetics
|February 8, 2026
概括
谢尔帕高地人拥有EPAS1和EGLN1基因的遗传适应,导致皮质素 (EPO) 反应减弱和增强的缺氧耐受性. 这些发现揭示了高度适应的遗传机制.
科学领域:
- 人类适应高海拔环境.
- 缺氧反应的遗传学和分子生物学.
背景情况:
- 谢尔巴人群表现出对高海拔低氧的特殊耐受性.
- 由自然选择驱动的遗传适应被假定是这种现象的基础.
研究的目的:
- 研究内皮PAS域蛋白1 (EPAS1) 和egl-9家族缺氧诱导因子1 (EGLN1) 在谢尔帕高海拔适应中的作用.
- 检查与低氧耐受性相关的遗传变异和基因表达水平.
主要方法:
- 收集了谢尔帕高地人和低地控制者的血液样本.
- 测量了血清中红色素 (EPO) 度.
- 对EPAS1和EGLN1基因的特定变异进行基因型定型,并评估它们的mRNA表达水平.
主要成果:
- 谢尔帕人表现出较低的氧和度,但与低地人相比,他们的EPO水平相当,表明EPO反应减弱.
- 谢尔巴人的野生类型EPAS1和EGLN1等位基因的频率明显较低.
- 在Sherpa高地动物中观察到EPAS1和EGLN1的mRNA表达减少.
结论:
- 在EPAS1和EGLN1中,高海拔适应变异与谢尔巴人减少基因表达和减弱的EPO反应有关.
- 这表明低氧诱导因子通路的转录调制有助于低氧耐受性.
- 这些发现阐明了使谢尔巴人适应高海拔低氧的遗传机制.
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