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王彦伟,王明金,卢学伟,黄丽敏,赵 斌.抗阻训练对老龄大鼠骨骼肌新生细胞核数量的影响[J].中国康复医学杂志,2012,27(6):504~509
抗阻训练对老龄大鼠骨骼肌新生细胞核数量的影响    点此下载全文
王彦伟  王明金  卢学伟  黄丽敏  赵 斌
河北师范大学,050090
基金项目:河北省自然科学基金资助项目(C2008000177),河北师范大学研究生科研基金资助项目(201002024)
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摘要:
      摘要 目的:观察10周抗阻训练后老龄大鼠骨骼肌内细胞核数量的变化情况,及其合成能力加强。 方法:选取17月龄的SD大鼠40只,随机分为安静组、大、中、小负重训练组,每组10只,用5-溴脱氧尿嘧啶核苷(Brdu)对新生细胞核进行标记,通过免疫组织化学的方法对新生肌核的数量进行比较。 结果:新生肌核数量方面:大负荷组(7.5±4.2)和中负荷组(6.7±3.6),显著高于安静组(2.1±1.3)和小负荷组(5.1±2.6)。肌纤维内肌核平均数量大负荷组(3.2±0.6)和中负荷组(3.1±0.5),显著高于安静组(2.4±0.5)和小负荷组(2.8±0.6)。肌肉重量方面,中负荷的(10.6±1.3g)和大负荷(10.1±1.4g),显著高于安静组(8.2±1.2g)。 结论:抗阻训练能使骨骼肌的细胞核增加,进而使骨骼肌的力量和体积增大。
关键词:抗阻训练  骨骼肌  肌核
Impact of resistant training on amount of nascent nuclei of aging rats' skeletal muscles    Download Fulltext
Hebei Normal University,Shijiazhuang,050024
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Abstract:
      Abstract Objective: To observe the impact of 10-week resistant training on the amount of nascent nuclei of skeletal muscles in aging rats,and strengthening of it's synthesis ability. Method: Forty SD rats(17 month old) were selected randomly divided into a quiet group as well as large, medium and low loading training groups, with 10 rats in each group. The nascent myonucle: were marked with 5-bromodeoxyuridine(Brdu). The amount of nascent myonuclei were compared with immunohistochemical method. Result: The amounts of nascent myonuclei in large loading training group(7.5±4.2) and moderate loading training group(6.7±3.6)were significantly higher than that in control group (2.1±1.3)and low loading training group(5.1±2.6). The average quantity of myonuclei in muscle fiber in large loading training group(3.2±0.6) and moderate loading training group(3.1±0.5) were significantly higher than that in control group (2.4±0.5)and low loading training group(2.8±0.6). The weight of skeletal muscle in moderate loading training group(10.6±1.3g) and large loading training group(10.1±1.4g) were significantly higher than that in control group(8.2±1.2g) Conclusion: Resistant training could increase the amount of skeletal muscle nuclei, so as to enhance the strength of skeletal muscle and the volume of skeletal muscle.
Keywords:resistant training  skeletal muscle  myonuclei
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