中国组织工程研究 ›› 2013, Vol. 17 ›› Issue (37): 6555-6560.doi: 10.3969/j.issn.2095-4344.2013.37.003

• 骨组织构建 bone tissue construction • 上一篇    下一篇

短期中等强度跑台运动对雄性高脂血症大鼠骨密度的影响

王晓红,徐  超,张  卓,郭连莹,周  波   

  1. 沈阳医学院营养与食品卫生学教研室,环境与人口健康实验室,辽宁省沈阳市  110034
  • 收稿日期:2013-03-05 修回日期:2013-04-18 出版日期:2013-09-10 发布日期:2013-09-10
  • 通讯作者: 周波,博士,教授,沈阳医学院营养与食品卫生学教研室,环境与人口健康实验室,辽宁省沈阳市 110034 zhoubo@symc.edu.cn
  • 作者简介:王晓红,女,1963年生,辽宁省辽阳市人,汉族,主任技师,主要从事食物营养方面研究。
  • 基金资助:

    辽宁省教育厅高等学校科学研究项目(2009A693)*:高胆固醇血症综合防治技术的实验研究及机制探讨

Short-time middle-load treadmill exercise affects the bone mineral density of hyperlipidemia male rats

Wang Xiao-hong, Xu Chao, Zhang Zhuo, Guo Lian-ying, Zhou Bo   

  1. Department of Nutrition and Food Hygiene, Shenyang Medical College, Shenyang  110034, Liaoning Province, China
  • Received:2013-03-05 Revised:2013-04-18 Online:2013-09-10 Published:2013-09-10
  • Contact: Zhou Bo, M.D., Professor, Department of Nutrition and Food Hygiene, Shenyang Medical College, Shenyang 110034, Liaoning Province, China zhoubo@symc.edu.cn
  • About author:Wang Xiao-hong, Chief technician, Department of Nutrition and Food Hygiene, Shenyang Medical College, Shenyang 110034, Liaoning Province, China wxh0515@hotmail.com
  • Supported by:

    Science Research Program of Higher Education, Liaoning Education Bureau, No. 2009A693*

摘要:

背景:高脂血症可导致大鼠骨质疏松,适量运动可增加骨密度,但短期运动对高脂血症导致骨质疏松的雄性动物骨密度的影响尚不清楚。
目的:探讨短期中等强度跑台运动对雄性高脂血症大鼠骨密度的影响。
方法:将26只SD雄性大鼠随机分为正常对照组(n=8)、高脂血症组(n=9)、运动干预组(n=9)。正常对照组喂饲普通饲料;其他两组喂饲高脂饲料建立大鼠高脂血症模型,持续4周。运动干预组大鼠进行跑台训练,每周训练5 d,共4周,每天强度为:第1周15 min,速度15 m/min;第2周20 min,速度15 m/min;后2周20 min,速度20 m/min,跑台坡度均为0°。实验结束后处死大鼠,取其右侧股骨检测骨密度、胫骨观察骨形态变化,测定血浆碱性磷酸酶活性和钙磷含量。
结果与结论:与正常对照组比较,高脂血症组股骨远端骨密度显著降低(P < 0.05),胫骨近端骨小梁排列稀疏变薄,间隙增宽,髓腔内有大量脂肪细胞浸润或融合成空泡,血浆碱性磷酸酶明显增加(P < 0.01)。与高脂血症组比较,运动干预组股骨远端骨密度显著增加(P < 0.05),经体质量校正后股骨全骨密度增加(P < 0.05),胫骨近端骨小梁排列致密整齐,小梁间距小,血浆碱性磷酸酶增加(P < 0.01)。血浆钙磷含量各组间差异无显著性意义。实验结果说明短期中等强度跑台运动增加高脂血症雄性大鼠骨密度。

关键词: 组织构建, 骨组织构建, 高脂血症, 跑台运动, 运动干预, 雄性大鼠, 骨骼, 骨密度, 骨重建, 省级基金

Abstract:

BACKGROUND: Some studies have shown that hyperlipidemia can lead to osteoporosis in rats, and exercise can increase the bone mineral density of rats. But the effect of short-time exercise on the bone mineral density of hyperlipdemia induced osteoporosis male rats is unclear yet.
OBJECTIVE: To investigate the effect of short-time middle-load treadmill exercise on the bone mineral density of hyperlipidemia male rats.
METHODS: Twenty-six male Sprague Dawley rats were randomly divided into three groups: control group (n=8), hyperlipidemia group (n=9) and exercise intervention group (n=9). The rats in the control group were fed with normal diet, and the rats in the other two groups were fed with high-fat diet and lasted for 4 weeks to establish the hyperlipidemia models. The rats in the exercise intervention group received treadmill exercise 5 days per week for 4 weeks according to the following schedule: 15 m/min for 15 minutes in the 1st week, 15 m/min for 20 minutes in the 2nd week, and then 20 m/min for 20 minutes in the last 2 weeks. Slope grade of the treadmill was adjusted at 0°. At the end of experiment, the rats were sacrificed, and the bone mineral density of the right femur, the morphological change of tibia, the level of plasma alkaline phosphates and calcium content were examined.
RESULTS AND CONCLUSION: Compared with the control group, the distal femur bone mineral density in hyperlipidemia group was significantly decreased (P < 0.05); histological analysis of the proximal tibia showed thinning and loss of bony trabeculae arrangement, the gap was widened, and a large amount of fat cells infiltration or integration into vacuoles in the marrow was observed, the plasma alkaline phosphates was significantly increased (P < 0.01). Compared with the hyperlipidemia group, distal femur bone mineral density in the exercise intervention group was increased (P < 0.05). After adjust body weight, the whole femur bone mineral density was significantly greater in exercise intervention group compared to hyperlipidemia group (P < 0.05). The histological analysis of the proximal tibia showed that the spaces of bone trabeculae decreased and the structure of bone trabeculae compacted, the alkaline phosphates activities were increased (P < 0.01). There were no significant differences in serum calcium and phosphates levels between groups. The results show that short-time middle-load treadmill exercise can increase the bone mineral density of hyperlipidemia male rats.

Key words: hyperlipidemias, osteoporosis, bone density, exercise test, femur, tibia

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