在西藏绵羊中与氧气代谢相关的EPO的表达和变化
Yue Ren1,2, Qiming Xi3, Zhaohua He3
1Institute of Livestock Research, Tibet Academy of Agricultural and Animal Husbandry Sciences, Lhasa 850000, China.
Animals : an open access journal from MDPI
|February 24, 2024
概括
西藏绵羊表现出高海拔和器官特异性的红素蛋白 (EPO) 基因表达,鉴定出EPO基因变体显著影响氧气水平,有助于适应高海拔低氧.
科学领域:
- 动物遗传学动物遗传学
- 生理学 生理学 生理学
- 生物化学 生物化学
- 高海拔适应 高海拔适应
背景情况:
- 西藏绵羊对高原环境具有显著的适应性,但对低氧适应的精确遗传和分子机制仍然不完全理解.
- 进一步研究藏族羊的功能基因和调节途径,以控制低氧耐受性,对于阐明这些适应性至关重要.
研究的目的:
- 研究西藏绵羊中与缺氧相关的红素蛋白 (EPO) 基因在不同高度和组织中的表达模式.
- 在EPO基因中识别单核酸多态 (SNP) 并分析它们与血液气体参数的相关性,特别是氧的部分压力 (pO2).
主要方法:
- 采用RT-qPCR测量在不同高度 (100米,2500米,3500米,4500米) 的胡羊和藏羊的各种组织 (心脏,肺,脏,肝脏,脏,肌肉) 中的EPOmRNA表达.
- 用DNA测序和竞争性等位基因特定PCR (KASP) 技术来检测EPO基因中的SNP.
- 进行了统计分析,以将确定的遗传多态性和单元型与血液气体测量相关联,包括pO2.
主要成果:
- 埃博基因表达显示出显著的组织特异性,在脏中观察到的最高水平.
- 与胡羊相比,在海拔4500米的西藏绵羊在心脏,肺和肝脏中显示出明显更高的EPO基因表达,心脏EPO水平随着海拔的增加而增加.
- 确定了三种EPO基因SNP (g.855 A > C,g.1985 T > G和g.2115 G > C),g.2115 G > C变体和特定的单元型组合与pO2显著相关.
结论:
- 西藏羊的EPO基因表达因海拔和器官而有所区别,反映了对缺氧条件的适应性反应.
- 在EPO基因中的遗传变异,特别是g.2115 G > C SNP和相关的单质类型,在调节pO2水平方面发挥着重要作用.
- 这些发现表明,EPO基因变异有助于提升西藏绵羊中观察到的低氧耐受性,促进它们适应高海拔环境.
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