...
首页> 外文期刊>Journal of Cachexia, Sarcopenia and Muscle >Evaluation of early biomarkers of muscle anabolic response to testosterone
【24h】

Evaluation of early biomarkers of muscle anabolic response to testosterone

机译:评估肌肉对睾丸合成代谢的早期生物标志物

获取原文
           

摘要

BackgroundEarly biomarkers of skeletal muscle anabolism will facilitate the development of therapies for sarcopenia and frailty.Methods and resultsWe examined plasma type III collagen N-terminal propeptide (P3NP), skeletal muscle protein fractional synthesis rate, and gene and protein expression profiles to identify testosterone-induced changes in muscle anabolism. Two placebo-controlled studies enrolled community-dwelling men (study 1, 60–75?years; study 2, 18–40?years) with low to normal testosterone levels. Men were randomized to lower dose (study 1, 100?mg; study 2, 200?mg) or higher dose (study 1, 300 mg; study 2, 600 mg) single intramuscular testosterone or saline injection. After 1?week, testosterone acutely increased plasma P3NP levels in a dose-dependent manner and altered the expression of several skeletal muscle transcripts and proteins. Though not statistically significant, mixed muscle protein fractional synthesis rate tended to increase (1.08-fold with 100?mg testosterone, 1.12-fold with 300?mg testosterone). Testosterone exposure also increased skeletal muscle expression of the collagen type III gene that encodes P3NP.ConclusionP3NP is a potentially useful early biomarker for muscle anabolic therapy. Skeletal muscle protein and RNA profiling are useful tools for the discovery of novel muscle anabolic biomarkers.
机译:背景骨骼肌合成代谢的早期生物标志物将促进肌肉减少症和体弱疗法的发展。方法和结果我们检查了血浆III型胶原N末端前肽(P3NP),骨骼肌蛋白质分数合成速率以及基因和蛋白质表达谱,以鉴定睾丸激素-引起肌肉合成代谢改变。两项安慰剂对照研究纳入了睾丸激素水平低至正常的社区居民男性(研究1,60-75岁;研究2,18-40岁)。将男性随机分为低剂量(研究1,100?mg;研究2,200?mg)或更高剂量(研究1,300 mg;研究2,600 mg)单次肌内睾丸激素或生理盐水注射。 1周后,睾丸激素以剂量依赖性方式急剧增加血浆P3NP水平,并改变了几种骨骼肌转录本和蛋白质的表达。尽管没有统计学意义,但混合肌蛋白的分数合成率却有增加的趋势(100?mg睾丸激素为1.08倍,300?mg睾丸激素为1.12倍)。睾丸激素暴露还增加了编码P3NP的III型胶原基因的骨骼肌表达。结论P3NP是肌肉合成代谢治疗的潜在有用的早期生物标志物。骨骼肌蛋白质和RNA谱分析是发现新型肌肉合成代谢生物标记物的有用工具。

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号