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删除Tmem263会破坏GH/IGF-1轴,导致矮化,并损害骨收购

Dylan C Sarver¹, Jean Garcia-Diaz^2,3,4, Muzna Saqib¹

¹Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, United States.

|January 19, 2024

概括

TMEM263基因对于产后生长至关重要,它调节生长激素 (GH) /胰岛素类生长因子1 (IGF-1) 轴. 它的缺失会导致矮化和骨发育受损,因为它会破坏GH信号传递.

科学领域:

遗传学是一个遗传学.
内分泌学在内分泌学.
骨生物学骨生物学

背景情况:

全基因组关联研究 (GWAS) 确定TMEM263作为骨矿物质密度和生长的候选基因.
TMEM263的突变与各种物种的矮化和骨发育不良有关,但其在产后生长中的因果作用尚不清楚.

研究的目的:

研究TMEM263在产后骨生长中的功能,并确定其潜在的分子机制.

主要方法:

使用淘汰赛小鼠模型 (Tmem263-null) 研究TMEM263缺失对生长和骨发育的影响.
分析了体重,骨矿物质密度,生长板长度和循环IGF-1水平.
评估肝脏GH受体 (GHR) 表达和GH诱导的JAK2 / STAT5信号通路.
对肝脏组织进行了转录组分析.

主要成果:

Tmem263-null小鼠表现出严重的产后生长不良,比例矮体和骨收购受损.
在出生后的第21天,生长缺陷显而易见,与受损的生长激素 (GH) /胰岛素类生长因子1 (IGF-1) 轴相关.
鼠标显示循环IGF-1的低水平,骨质减少,生长板较短,肝脏GHR表达和GH信号减少.
肝转录组分析显示,在Tmem263-null男性中,GH调节的基因表达和女性化发生了改变.

结论:

TMEM263通过维持GH/IGF-1信号通路,在调节产后生长方面发挥着关键的因果作用.
TMEM263中的缺陷可能导致生长激素不敏感和线性生长受损,这表明对人类骨疾病的潜在影响.

关键词:

GH不敏感性可能导致.在IGF-1的基础上,IGF-1 这是JAK/STAT信号.小矮主义是什么意思?遗传学遗传学遗传学是一个基因组学就是基因组学.增长激素增长激素的使用方法增长激素受体增长激素受体医学医学医学医学医学这里是鼠标鼠标鼠标鼠标鼠标鼠标.

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