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首页> 外文期刊>The journals of gerontology.Series A. Biological sciences and medical sciences >Human Slow Troponin T (TNNT1) Pre-mRNA Alternative Splicing Is an Indicator of Skeletal Muscle Response to Resistance Exercise in Older Adults
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Human Slow Troponin T (TNNT1) Pre-mRNA Alternative Splicing Is an Indicator of Skeletal Muscle Response to Resistance Exercise in Older Adults

机译:人慢肌钙蛋白T(TNNT1)前mRNA替代剪接是老年人对抵抗运动的骨骼肌反应的指标

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Slow skeletal muscle troponin T (TNNT1) pre-messenger RNA alternative splicing (AS) provides transcript diversity and increases the variety of proteins the gene encodes. Here, we identified three major TNNT1 splicing patterns (AS1-3), quantified their expression in the vastus lateralis muscle of older adults, and demonstrated that resistance training modifies their relative abundance; specifically, upregulating AS1 and downregulating AS2 and AS3. In addition, abundance of TNNT1 AS2 correlated negatively with single muscle fiber-specific force after resistance training, while abundance of AS1 correlated negatively with V-max. We propose that TNNT1 AS1, AS2 and the AS1/AS2 ratio are potential quantitative biomarkers of skeletal muscle adaptation to resistance training in older adults, and that their profile reflects enhanced single fiber muscle force in the absence of significant increases in fiber cross-sectional area.
机译:慢速骨骼肌肌钙蛋白T(TNNT1)信使RNA选择性剪接(AS)提供了转录本多样性,并增加了该基因编码的蛋白质种类。在这里,我们确定了三种主要的TNNT1剪接模式(AS1-3),量化了它们在老年人的外侧外侧肌中的表达,并证明了抵抗训练改变了它们的相对丰度。具体来说,上调AS1,下调AS2和AS3。此外,阻力训练后,TNNT1 AS2的丰度与单肌纤维比力呈负相关,而AS1的丰度与V-max呈负相关。我们建议TNNT1,AS1,AS2和AS1 / AS2比是老年人骨骼肌适应性训练中潜在的定量生物标志物,并且它们的分布图反映了在纤维横截面积没有明显增加的情况下单纤维肌肉力量的增强。

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