首页> 外文期刊>The journals of gerontology.Series A. Biological sciences and medical sciences >Long-lived growth hormone receptor knockout mice show a delay in age-related changes of body composition and bone characteristics.
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Long-lived growth hormone receptor knockout mice show a delay in age-related changes of body composition and bone characteristics.

机译:长寿的生长激素受体敲除小鼠显示出与年龄相关的身体组成和骨骼特征变化的延迟。

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摘要

There is conflicting information on the physiological role of growth hormone (GH) in the control of aging. This study reports dual-energy x-ray absorptiometry (DXA) measurements of body composition and bone characteristics in young, adult, and aged long-lived GH receptor knockout (GHR-KO) and normal mice to determine the effects of GH resistance during aging. Compared to controls, GHR-KO mice showed an increased percentage of body fat. GHR-KO mice have reduced total-body bone mineral density (BMD), bone mineral content, and bone area, but these parameters increased with age. In addition, GHR-KO mice have decreased femur length, femur BMD, and lower lumbar BMD compared to controls in all age groups. These parameters also continued to increase with age. Our results indicate that GH resistance alters body composition, bone growth, and bone maintenance during aging in GHR-KO mice.
机译:关于生长激素(GH)在控制衰老中的生理作用的信息存在矛盾。这项研究报告了双能X射线骨密度仪(DXA)测量年轻,成年和老年长寿GH受体敲除(GHR-KO)和正常小鼠的身体成分和骨骼特征,以确定衰老过程中GH抵抗的影响。与对照组相比,GHR-KO小鼠的体内脂肪百分比增加。 GHR-KO小鼠的全身骨矿物质密度(BMD),骨矿物质含量和骨面积减少,但是这些参数随着年龄的增长而增加。此外,与所有年龄组的对照组相比,GHR-KO小鼠的股骨长度,股骨BMD和腰椎BMD降低。这些参数也随着年龄的增长而继续增加。我们的结果表明,GH抵抗力会改变GHR-KO小鼠衰老过程中的身体成分,骨骼生长和骨骼维持。

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