中国组织工程研究 ›› 2021, Vol. 25 ›› Issue (26): 4145-4149.doi: 10.12307/2021.112

• 肌肉肌腱韧带组织构建 tissue construction of the muscle, tendon and ligament • 上一篇    下一篇

表没食子儿茶素没食子酸酯可减轻大鼠骨骼肌缺血再灌注损伤

薛  庆,童梁成,杨智伟,汪剑龄,赵  磊,周  胜,彭  赛,李  颖   

  1. 解放军东部战区空军医院骨科,江苏省南京市  210002
  • 收稿日期:2020-07-06 修回日期:2020-07-09 接受日期:2020-08-29 出版日期:2021-09-18 发布日期:2021-04-28
  • 通讯作者: 李颖,博士,副主任医师,解放军东部战区空军医院骨科,江苏省南京市 210002
  • 作者简介:薛庆,男,1989年生,安徽省宿州市人,汉族,2017年徐州医科大学毕业,硕士,医师,主要从事骨创伤研究。

Epigallocatechin gallate alleviates skeletal muscle ischemia-reperfusion injury in rats

Xue Qing, Tong Liangcheng, Yang Zhiwei, Wang Jianling, Zhao Lei, Zhou Sheng, Peng Sai, Li Ying   

  1. Department of Orthopedics, Air Force Hospital of Eastern Theater Command, Nanjing 210002, Jiangsu Province, China
  • Received:2020-07-06 Revised:2020-07-09 Accepted:2020-08-29 Online:2021-09-18 Published:2021-04-28
  • Contact: Li Ying, MD, Associate chief physician, Department of Orthopedics, Air Force Hospital of Eastern Theater Command, Nanjing 210002, Jiangsu Province, China
  • About author:Xue Qing, Master, Physician, Department of Orthopedics, Air Force Hospital of Eastern Theater Command, Nanjing 210002, Jiangsu Province, China

摘要:

文题释义:
缺血再灌注损伤:缺血后再灌注可使组织器官结构、功能得到恢复,患者病情好转康复,但有时缺血后再灌注不仅不能使组织器官功能恢复,反而加重组织器官的功能障碍和结构损伤。这种在缺血基础上恢复血流后组织损伤反而加重,甚至发生不可逆性损伤的现象称为缺血再灌注损伤。
细胞凋亡:为维持内环境稳定,由基因控制的细胞自主有序的死亡。细胞凋亡与细胞坏死不同,细胞凋亡不是一件被动的过程,而是主动过程,它涉及一系列基因的激活、表达以及在四肢再植术中调控等作用,它并不是病理条件下自体损伤的一种现象,而是为更好地适应生存环境而主动争取的一种死亡过程。

背景:既往研究表明,骨骼肌缺血再灌注损伤在四肢再植术中是一个常见而且严重的临床问题,严重影响再植肢体术后存活率及功能。表没食子儿茶素没食子酸酯(epigallocatechin gallate,EGCG)具有较强抗氧化性、抗炎及抑制细胞凋亡的作用。
目的:探讨EGCG在大鼠下肢骨骼肌缺血再灌注损伤中的作用。
方法:将雄性SD大鼠30只随机分为5组:假手术组、缺血再灌注组、EGCG组(10,100,200 mg/kg),除假手术组外,其他4组建立下肢缺血再灌注损伤模型,EGCG组在再灌注前30 min按照体质量腹腔注射EGCG。缺血4 h再灌注2 h后,取下腔静脉血和右腓肠肌组织,ELISA法检测血清中肿瘤坏死因子α和白细胞介素1β水平,腓肠肌组织中超氧化物歧化酶和髓过氧化物酶水平;苏木精-伊红染色法观察腓肠肌组织病理形态;TUNEL实验观察腓肠肌组织中细胞凋亡情况。
结果与结论:①与缺血再灌注组比较,EGCG组(100,200 mg/kg)血清中肿瘤坏死因子α和白细胞介素1β水平及腓肠肌组织中髓过氧化物酶水平降低,超氧化物歧化酶水平升高,且与EGCG剂量呈正相关性;②苏木精-伊红染色结果显示EGCG组(100,200 mg/kg)肌纤维连续性及完整性、间质水肿程度等病理表现得到明显改善;③TUNEL实验结果显示EGCG组(100,200 mg/kg)凋亡细胞明显减少;④结果表明,EGCG通过减轻炎症反应、抗氧化应激及抑制组织细胞凋亡保护大鼠骨骼肌缺血再灌注损伤。

https://orcid.org/0000-0001-9085-586X (薛庆)

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: 缺血再灌注损伤, 骨骼肌, 表没食子儿茶素没食子酸酯, 氧化应激, 炎症, 凋亡, 大鼠

Abstract:


BACKGROUND: Skeletal muscle ischemia-reperfusion (I/R) injury is a serious problem commonly encountered in clinical practice which seriously impacts the function and survival rate of replanted limbs. Epigallocatechin gallate (EGCG) has been proved to be antioxidant, anti-inflammatory and anti-apoptotic. 

OBJECTIVE: To investigate the role of EGCG in I/R injury of rat skeletal muscle.
METHODS: Thirty male Sprague-Dawley rats were randomly divided into five groups: sham operation group, I/R group, and three EGCG groups in which 10, 100 and 200 mg/kg EGCG was intraperitoneally injected 30 minutes before reperfusion respectively according to the weight of the rats. A lower limb I/R injury model was made in each group except for the sham operation group. The levels of tumor necrosis factor-α and interleukin-1β in serum were measured and the levels of superoxide dismutase and myeloperoxidasein gastrocnemius muscle tissue were detected. Morphological changes of gastrocnemius muscle tissue were observed by hematoxylin-eosin staining. Cell apoptosis in gastrocnemius muscle tissue was observed by the TUNEL assay.
RESULTS AND CONCLUSION: In the 100 and 200 mg/kg EGCG groups compared to the I/R group, there were the decreased levels of tumor necrosis factor-α and interleukin-1β in serum and myeloperoxidase in gastrocnemius muscle tissue and the increased level of superoxide dismutase in gastrocnemius muscle tissue, which were positively correlated with the EGCG dose. Hematoxylin-eosin staining results suggested an evident improvement in pathological manifestations ofgastrocnemius muscle, such as the continuity and integrity of muscle fibers and the degree of interstitial edema, in 100 and 200 mg/kg EGCG groups. TUNEL assay showed that 100 and 200 mg/kg EGCG inhibited cell apoptosis in gastrocnemius muscle tissue. To conclude, EGCG protects rat skeletal muscle from I/R injury by reducing inflammatory reaction, antioxidant stress and inhibiting apoptosis.

Key words: ischemia-reperfusion injury, skeletal muscle, epigallocatechin gallate, oxidative stress, inflammation, apoptosis, rat

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