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在小鼠中近端大动脉动脉瘤表达不充分的转化生长因子-β1的表达

Masao Kakoki¹, John R Hagaman², Masahiko Terajima³

¹Department of Physiology, Dokkyo Medical University, 880 Kitakobayashi, Shimotsuga district, Mibu, Tochigi 321-0293, Japan.

The journal of physiological sciences : JPS

|June 1, 2025

概括

转化生长因子-β1 (TGF-β1) 功能丧失突变通过减少原和弹性质交联,在小鼠中引起大动脉动脉瘤. 这表明TGF-β1对胸前大动脉动脉瘤有保护作用.

科学领域:

心血管生物学心血管生物学
遗传学遗传学是一个
分子生物学分子生物学

背景情况:

转化生长因子 (TGF) -β信号通路突变与大动脉动脉瘤有关.
原型配体TGFB1在胸前大动脉动脉瘤中的作用在人类中仍然没有特征.

研究的目的:

在哺乳动物模型中研究改变TGFB1基因表达对大动脉动脉瘤发育的影响.
为了确定TGF-β1是否在大动脉完整性中起着保护作用.

主要方法:

研究了对TgFB1功能丧失 (Tgfb1^L/L) 和功能增加 (Tgfb1^H/H) 的基因修饰小鼠的大动脉表型.
突变小鼠与野生类型对照的寿命和大动脉特征的比较.
定量化的大动脉水平的原和弹性素稳定交叉链接和相关的酶表达.

主要成果:

与野生型相比,Tgfb1^L/L小鼠发生了自发的近端大动脉动脉瘤,并表现出较短的寿命.
Tgfb1^H/H小鼠没有发生大动脉动脉瘤,寿命与野生类型相比较.
大动脉原和弹性素的交叉链接,以及相关的酶表达,在Tgfb1^L/L小鼠中显著下降.

结论:

在TGFB1中失去功能的突变足以在小鼠中引起大动脉动脉瘤.
TGF-β1似乎对大动脉动脉瘤有保护作用,至少部分是通过增强原蛋白和弹性质交叉链接.
这些发现强调了TGF-β1在维持大动脉壁完整性方面的关键作用.

关键词:

3未翻译的地区细胞外矩阵是细胞外矩阵.基因定位基因定位

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