法医学杂志 ›› 2019, Vol. 35 ›› Issue (3): 267-272,279.DOI: 10.12116/j.issn.1004-5619.2019.03.001

• 论著 •    下一篇

小鼠骨骼肌挫伤修复过程中周细胞数量变化及其与损伤时间相关性

温书恒1,2, 田志岭3, 张淼1,2, 张孟周1,2, 王帅1,2, 陈京伟1,2, 孙英富1,2, 王昌亮1,2,4, 赵锐1,2, 官大威1,2   

  1. 1. 中国医科大学法医学院 法医司法鉴定中心,辽宁 沈阳 110013; 2. 辽宁省智慧检务创新研究院 智慧司法鉴定联合实验室,辽宁 沈阳 110122; 3. 司法鉴定科学研究院 上海市法医学重点实验室 上海司法鉴定专业技术服务平台,上海 200063; 4. 辽宁省人民检察院,辽宁 沈阳 110033
  • 发布日期:2019-06-25 出版日期:2019-06-28
  • 通讯作者: 官大威,男,教授,博士研究生导师,主要从事法医病理学教学、科研及鉴定;E-mail:dwguan@cmu.edu.cn
  • 作者简介:温书恒(1993—),男,硕士,主要从事骨骼肌及脑损伤愈合机制的研究;E-mail:severuswen@hotmail.com
  • 基金资助:
    国家自然科学基金资助项目(81273342,81671862,81772023,81871529,81801874);国家重点研发计划子课题资助项目(2018YFC0807204);中国工程院重大咨询研究子课题资助项目(2016-XZ-21-03)

Relationship between Changes of Pericyte Number and Wound Age during Repair of Skeletal Muscle Contusion in Mice

WEN Shu-heng1,2, TIAN Zhi-ling3, ZHANG Miao1,2, ZHANG Meng-zhou1,2, WANG Shuai1,2, CHEN Jing-Wei1,2, SUN Ying-fu1,2, WANG Chang-liang1,2,4, ZHAO Rui1,2, GUAN Da-wei1,2   

  1. 1. Center of Medico-legal Investigation, School of Forensic Medicine, China Medical University, Shenyang 110122, China; 2. Collaborative Laboratory of Intelligentized Forensic Science, Shenyang 110122, China; 3. Shanghai Key Laboratory of Forensic Medicine, Shanghai Forensic Service Platform, Academy of Forensic Science, Shanghai 200063, China; 4. Liaoning Provincial People’s Procuratorate, Shenyang 110033, China
  • Online:2019-06-25 Published:2019-06-28

摘要: 目的 观察小鼠骨骼肌挫伤后不同时间段周细胞数量变化规律,并探讨其在损伤时间推断中的作用。 方法 制作小鼠腓肠肌挫伤模型,应用免疫荧光染色法对小鼠骨骼肌挫伤后1、3、5、7、9、14、28 d的周细胞形态及数量进行检测。 结果 与正常骨骼肌周细胞细长形态相比,挫伤区周细胞体积增大、形态变圆,胞核呈圆形,其中部分周细胞表达卫星细胞标记物配对盒转录因子(paired-box transcription factor,Pax7)或生肌决定因子(myoblast determination,MyoD) 1。挫伤后骨骼肌周细胞数量变化具有时间规律性,并随损伤时间延长呈单峰性分布。挫伤中心区周细胞数量于挫伤后5 d达到峰值,挫伤周边区周细胞数量在挫伤后5 d和7 d达到峰值。 结论 小鼠骨骼肌挫伤后,挫伤区周细胞数量变化具有一定的时间规律性,提示其可能作为肌肉损伤时间推断的一个参考指标,并参与骨骼肌损伤后的肌肉修复再生过程。

关键词: 法医病理学, 挫伤, 卫星细胞, 骨骼肌, 周细胞, 损伤时间推断, 小鼠

Abstract: Objective To observe the change pattern of pericyte number at different time periods after mice skeletal muscle contusion and discuss its role in wound age estimation. Methods A mice gastrocnemius muscle contusion model was established. The form and number changes of pericytes at 1, 3, 5, 7, 9, 14, and 28 d post-injury were detected by multiple immunofluorescence staining. Results Compared with the slender shape of pericytes in normal skeletal muscles, pericytes in the contusion area had increased volume, rounder form and a round nuclei. Part of pericytes were found to express satellite cell markers paired-box transcription factor (Pax7) or myoblast determination 1 (MyoD1). The changes of pericyte number in skeletal muscles after contusion were time-dependant, and showed unimodal distribution with the extension of wound age. In the central contusion area, the number of pericytes peaked at 5 d post-injury while in the peripheral contusion area, the number of pericytes peaked at 5 d and 7 d post-injury. Conclusion The number of pericytes in contusion area varies time-dependently after skeletal muscle contusion in mice and might be a reference index for muscle wound age estimation, and is involved in the repair and regeneration of skeletal muscle injury.

Key words: forensic pathology, contusions, satellite cells, skeletal muscle, pericytes, wound age estimation, mice