中国组织工程研究 ›› 2026, Vol. 30 ›› Issue (1): 43-49.doi: 10.12307/2025.927

• 脂肪干细胞 adipose-derived stem cells • 上一篇    下一篇

脂肪干细胞源性外泌体中miR-196b-5p对大鼠烧伤创面愈合的影响

左  娜,唐  琪,于  猛,陶  凯   

  1. 中国医科大学附属第四医院烧伤整形显微外科,辽宁省沈阳市  110000
  • 收稿日期:2024-10-11 接受日期:2024-12-03 出版日期:2026-01-08 发布日期:2025-06-16
  • 通讯作者: 陶凯,博士,主任医师,中国医科大学附属第四医院烧伤整形显微外科,辽宁省沈阳市 110000
  • 作者简介:左娜,女,1989年生,辽宁省沈阳市人,汉族,2015年中国医科大学毕业,硕士,主治医师,主要从事瘢痕的综合治疗、烧创伤创面修复、激光美容等。
  • 基金资助:
    辽宁省科学技术计划(2021JH2/10300108),项目负责人:陶凯

Effect of miR-196b-5p in adipose-derived stem cell exosomes on burn wound healing in rats

Zuo Na, Tang Qi, Yu Meng, Tao Kai   

  1. Department of Burn Plastic Microsurgery, Fourth Affiliated Hospital of China Medical University, Shenyang 110000, Liaoning Province, China
  • Received:2024-10-11 Accepted:2024-12-03 Online:2026-01-08 Published:2025-06-16
  • Contact: Tao Kai, MD, Chief physician, Department of Burn Plastic Microsurgery, Fourth Affiliated Hospital of China Medical University, Shenyang 110000, Liaoning Province, China
  • About author:Zuo Na, MS, Attending physician, Department of Burn Plastic Microsurgery, Fourth Affiliated Hospital of China Medical University, Shenyang 110000, Liaoning Province, China
  • Supported by:
    Liaoning Provincial Science and Technology Plan, No. 2021JH2/10300108 (to TK)

摘要:

文题释义:

脂肪干细胞源性外泌体:从脂肪干细胞中提取的直径40-100 nm的细胞外囊泡,其内含有多种生物活性物质,包括miRNA、蛋白质等,可作为细胞间通讯的媒介。外泌体具有较低免疫原性、便于存储及运输,目前已被发现可用于疾病诊治、靶向药传递、创面修复等不同领域,具有广泛的应用前景。
微小RNA:是一类小的非编码RNA,通过与部分互补位点碱基配对参与基因调控,涉及许多重要的生理过程调节,包括细胞的增殖、迁移、凋亡等,是外泌体的关键组成部分和生物标志物。

摘要
背景:目前发现miR-196b-5p在细胞增殖、迁移及抑制瘢痕增生中发挥作用,但在创面愈合过程中是否发挥作用缺乏相关研究。
目的:探讨脂肪干细胞源性外泌体中miR-196b-5p对烧伤创面愈合的影响。
方法:构建SD大鼠皮肤深Ⅱ度烧伤模型,随机分为4组:空白对照组、外泌体组、agomiR-196b-5p组和外泌体+antagomiR-196b-5p组,每组10只,根据不同分组于创周注射PBS、脂肪干细胞源性外泌体、miR-196b-5p激动剂和miR-196b-5p抑制剂,伤后即刻和伤后7,14,21 d观察创面愈合情况,伤后7 d苏木精-伊红染色观察创面炎症表达,伤后14 d Masson染色观察创面胶原表达及免疫组化染色观察创面CD31表达,伤后7 d Western blot检测创面中α-平滑肌肌动蛋白、Ⅰ型胶原蛋白表达。
结果与结论:①agomiR-196b-5p组创面愈合较快,空白对照组和外泌体+antagomiR-196b-5p组愈合较慢;②与空白对照组和外泌体+antagomiR-196b-5p组相比,外泌体组和agomiR-196b-5p组创面炎性细胞浸润较少,CD31表达明显增加(P < 0.01);③与空白对照组和外泌体+antagomiR-196b-5p组相比,外泌体组和agomiR-196b-5p组中α-平滑肌肌动蛋白、Ⅰ型胶原蛋白表达升高(P < 0.05)。结果表明,脂肪干细胞源性外泌体中miR-196b-5p能促进大鼠烧伤创面愈合。

关键词: 脂肪干细胞, 外泌体, miR-196b-5p, 烧伤, 创面愈合, 炎症反应, 血管新生, 工程化外泌体

Abstract: BACKGROUND: Currently, miR-196b-5p has been found to play a role in cell proliferation, migration and inhibition of scar hyperplasia, but there is a lack of relevant studies on whether it plays a role in the process of wound healing.
OBJECTIVE: To investigate the effect of miR-196b-5p in adipose stem cell-derived exosomes on burn wound healing. 
METHODS: The models of deep second degree skin burn in SD rats were established and randomly divided into four groups: blank control group, exosome group, agomiR-196b-5p group, and exosome + antagomiR-196b-5p group, with 10 rats in each group. PBS, adipose-derived stem cell-derived exosomes, miR-196b-5p agonist, and miR-196b-5p inhibitor were injected around the wound according to different groups. Wound healing was observed immediately after injury and on days 7, 14, and 21 after injury. On day 7 after surgery, hematoxylin-eosin staining was used to observe the expression of inflammation in the wound surface. On day 14 after suregery, Masson staining was used to observe the expression of collagen and immunohistochemical staining was used to observe the expression of CD31 in the wound surface. On day 7 after surgery, western blot assay was performed to detect the expression of α-smooth muscle actin and type I collagen in the wound surface. 
RESULTS AND CONCLUSION: (1) The wound healing was faster in the agomiR-196b-5p group, while it was slower in the blank control group and the exosome+antagomiR-196b-5p group. (2) Compared with the blank control group and the exosome+antagomiR-196b-5p group, the wound infiltration of inflammatory cells was less in the exosome group and the agomiR-196b-5p group, and the expression of CD31 was significantly increased (P < 0.01). (3) Compared with the blank control group and the exosome+antagomiR-196b-5p group, the expression levels of α-smooth muscle actin and type I collagen were increased in the exosome group and the agomiR-196b-5p group (P < 0.05). These findings indicate that miR-196b-5p in adipose stem cell-derived exosomes can promote burn wound healing in rats.

Key words: adipose-derived stem cell, exosome, miR-196b-5p, burn, wound healing, inflammatory response, angiogenesis, engineered exosome

中图分类号: