(1.华东师范大学 体育与健康学院,上海 200241;2.中国矿业大学 体育学院,江苏 徐州 221116) 摘 要:采用负重爬梯模型进行抗阻训练,观察年龄和抗组训练对SAMP-8小鼠体重、SI及骨骼肌氧化应激的影响。40只雄性SAMP-8小鼠随机分成青年安静组(YC)、青年抗阻组(YR),老年安静组(OC)和老年抗阻组(OR)。抗阻训练组进行8周爬梯运动,每周3次。通过比色法检测T-AOC、SOD活性和MDA含量,ELISA试剂盒测定8-OH-dG的含量。结果:各组的体重均没有明显的差异,而YC组的SI明显高于OC组(P<0.05),其它各组之间没有明显的差异;YC组总SOD活性和T-AOC高于OC组(P<0.05),YR组的总SOD活性和T-AOC明显低于YC组(P<0.05),而OR组的总SOD活性高于OC组(P<0.05),T-AOC却与之相反(P<0.05);OC组的8-OH-dG的质量浓度明显高于YC组(P<0.05),YC组与YR组的8-OH-dG的浓度无显著差异,而OR组的8-OH-dG的质量浓度明显低于OC组(P<0.05),YC组MDA的质量摩尔浓度低于OC组(P<0.05),YR组和OR组MDA的质量摩尔浓度低于YC组和OC组(P<0.05)。结果说明:1)在衰老过程中,SAMP-8小鼠的体重未发生明显的变化,SI却有明显的变化,表现出了骨骼肌衰减的特征,而抗阻运动对于体重、骨骼肌质量的改变均没有影响。2)衰老时,骨骼肌的抗氧化水平明显地降低,而氧化损伤却显著增高,通过抗阻训练可以明显逆转这一状况。 |
WANG Li-feng1,LI Hai-peng2,WANG Jing1,MA Jing-liang1,CHEN Cai-zhen1,LU Jian1
(1.School of Physical Education & Health,East China Normal University,Shanghai 200241,China;2.School of Physical Education,China University of Mining and Technology,Xuzhou 221116,China) Abstract: By using a load bearing ladder climbing model to conduct anti-resistance training, the authors observed the effects of age and anti-resistance training on the weight, SI and skeletal muscle oxidation stress of SAMP-8 mice. 40 male SAMP-8 mice were randomly divided into a youth calm (YC) group, a youth anti-resistance (YR) group, an old calm (OC) group, and an old anti-resistance (OR) group. The anti-resistance groups performed ladder climbing for 8 weeks, 3 times a week. The authors measured the T-AOC, SOD activity and MDA content by means of colorimetry, and measured the content of 8-OH-dG by using an ELISA kit. Results: there was no significant dif-ference in weight between mice in various groups, while the SI of mice in the YC group was significantly higher than that of mice in the OC group (P<0.05), and there was no significant difference in SI between mice in other groups; the total SOD activity and T-AOC of mice in the YC group were higher than those of mice in the OC group (P<0.05), the total SOD activity and T-AOC of mice in the YR group were significantly lower than those of mice in the YC group (P<0.05), while the total SOD activity of mice in the OR group was higher than that of mice in the OC group (P<0.05), yet the T-AOC of mice in the OR group was lower than that of mice in the OC group (P<0.05); the concentration of 8-OH-dG of mice in the OC group was significantly higher than that of mice in the YC group (P<0.05), and there was no significant difference in the concentration of 8-OH-dG of mice in the YC group and YR group, while the concentration of 8-OH-dG of mice in the OR group was significantly lower than that of mice in the OC group (P<0.05), the MDA concentration of mice in the YC group was lower than that of mice in the OC group (P<0.05), and the MDA activity of mice in the YR group and OR group was lower than that of mice in the YC group and OC group (P<0.05). The results indicated the followings: 1) in the process of aging, there was no significant change to the weight of SAMP-8 mice, yet there was a significant change to SI, which showed the characteristics of sarcopenia, while the anti-resistance exercise had no effect on the change of the weight and skeletal muscle quality; 2) when aging, skeletal muscles’ anti-oxidation performance lowered significantly, yet their oxidative damage in-creased significantly; such a condition can be significantly reversed by anti-resistance training. |
下载本期全文:点击下载