中国组织工程研究 ›› 2021, Vol. 25 ›› Issue (26): 4118-4122.doi: 10.12307/2021.108

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

自然衰老大鼠不同部位骨组织形态、骨密度及骨代谢指标的变化

游  斌,黄秀珠,林  煜,黄  浠   

  1. 厦门大学附属福州第二医院,福建省福州市  350007
  • 收稿日期:2020-08-12 修回日期:2020-08-14 接受日期:2020-09-21 出版日期:2021-09-18 发布日期:2021-04-25
  • 通讯作者: 游斌,厦门大学附属福州第二医院,福建省福州市 350007
  • 作者简介:游斌,男,1969年生,福建省平潭市人,汉族,1992年福建医学院毕业,副主任医师,主要从事骨肿瘤影像与骨质疏松症方面的研究。

Changes in bone morphology, bone mineral density and bone metabolism in different parts of natural aging rats

You Bin, Huang Xiuzhu, Lin Yu, Huang Xi   

  1. Fuzhou Second Hospital Affiliated to Xiamen University, Fuzhou 350007, Fujian Province, China
  • Received:2020-08-12 Revised:2020-08-14 Accepted:2020-09-21 Online:2021-09-18 Published:2021-04-25
  • Contact: You Bin, Fuzhou Second Hospital Affiliated to Xiamen University, Fuzhou 350007, Fujian Province, China
  • About author:You Bin, Associate chief physician, Fuzhou Second Hospital Affiliated to Xiamen University, Fuzhou 350007, Fujian Province, China

摘要:

文题释义:
自然衰老:又称为内源性衰老或固有性衰老,是由于生物体内在因素引起的身体内各组织器官的衰老。
骨代谢:骨的功能是为肌肉收缩提供附着处及保护内脏等重要的生命器官。一般认为骨在细胞水平上是不活跃的,事实上骨细胞在不停地进行着细胞代谢,不仅骨细胞之间会相互作用,还存在骨髓中的红细胞生成细胞和基质细胞相互作用,以进行骨的改建和重建。

背景:大鼠是四足啮齿动物,其骨骼负重方面与直立行走的人类并不相同,且大鼠最大寿限内出现骨稳态破坏的时程变化与人也是不一致的。
目的:分析不同大鼠自然衰老过程中骨代谢的变化。
方法:将SD大鼠分为雌性组与雄性组,各40只。其中雌性组随机分为雌性7,10,15,20月龄组,各10只;雄性组随机分为雄性7,10,15,20月龄组,各10只。实验于2016年6月经厦门大学附属福州第二医院动物实验伦理委员会批准,批准号20160012。
结果与结论:①雌性及雄性SD大鼠在7-10月龄时腰椎、股骨头及胫骨上段骨小梁排列规则,形成均匀致密网状;雌性SD大鼠在15-20月龄骨小梁纤细,间距增宽,排列散乱稀疏,可见多处中断;雄性SD大鼠在15月龄骨小梁稍细小,间距增宽,排列仍较整齐,20月龄骨小梁出现部分中断。②雌性及雄性SD大鼠各部位骨小梁面积百分比在10月龄起随月龄增加而下降,在20月龄达到最低值。骨密度结果也呈现相同趋势。③雌性及雄性SD大鼠骨碱性磷酸酶水平随着月龄增加逐渐降低。雌性SD大鼠1型胶原羧基末端肽水平随着月龄增加逐渐升高,雄性SD大鼠1型胶原羧基末端肽水平自10月龄起随着月龄增加逐渐降低。④提示SD大鼠骨骼7月龄处于生长平衡,10月龄开始衰退,15月龄衰退加速,20月龄完全衰退;其中雌性SD大鼠在15-20月龄骨代谢处于高转换状态,雄性SD大鼠在15-20月龄骨代谢处于低转换状态。

https://orcid.org/0000-0003-4405-0942 (游斌)

中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松;组织工程

关键词: SD大鼠, 性别, 骨质疏松, 衰老, 骨密度, 骨代谢, 组织形态, 骨形成, 骨吸收

Abstract:

BACKGROUND: Rats are a kind of quadruped rodents, with the bone weight being different from that of humans who walk upright, and the time course of bone homeostasis damage within the maximum life span of rats is also inconsistent with that of humans.

OBJECTIVE: To explore the changes inbone metabolism in different rats during natural aging. 
METHODS: A total of 80 Sprague-Dawley (SD) rats (male and female half) were randomly assigned into  7-,10-,15-,20-month groups according to their sex (n=10 per group). The study protocol was approved by the Animal Ethics Committee of Fuzhou Second Hospital Affiliated to Xiamen University with an approval No. 20160012 in June 2016.
RESULTS AND CONCLUSION: The bone trabeculae of female and male SD rats at 7 to 10 months of age arranged regularly and formed a uniform dense network.The bone trabeculae of femaleSD rats at 15 to 20 months of age were fine, the spacing was widened, the arrangement was scattered and sparse, and there were many discontinuities.The bone trabeculae of male SD rats at 15 months of age were slightly smaller, the spacing was widened, and the arrangement was still orderly, and the bone trabeculae of male SD rats at 20 months of age were partially interrupted.The percentage of bone trabecular area in all parts of female and male SD rats began to decrease at 10 months of age, and reached the lowest value at 20 months of age.The bone mineral density also showed the same trend.The bone alkaline phosphatase level of female and male SD rats decreased gradually with the increase of month age.The level oftype 1 collagen carboxy terminal peptide in female SD rats increased gradually with the increase of month age, while that of male SD rats began to decrease gradually at 10 months of age with the increase of month age.To conclude, 7, 10, 15, and 20 months old can represent four different stages: bone growth balance, beginning to decline, decline accelerated, and complete decline, respectively.Female SD rats at 15-20 months of agewere in a high-transition state of bone metabolism. Male SD rats at 15-20 months of agewere in a low-transition state.

Key words: Sprague-Dawleyrat, sex, osteoporosis, natural aging, bone mineral density, bone metabolism, histomorphology, bone formation, bone absorption

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