中国组织工程研究 ›› 2018, Vol. 22 ›› Issue (25): 3975-3980.doi: 10.3969/j.issn.2095-4344.0929

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

HGF/c-Met反应轴对脂肪干细胞修复烧伤创面的调控

李雪阳1,2,郑万玲2,杨 超1,夏斯展2,邢 新1   

  1. 1解放军第二军医大学附属长海医院整形外科,上海市 200433;2徐州医科大学附属医院整形外科,江苏省徐州市 221002
  • 修回日期:2018-03-03 出版日期:2018-09-08 发布日期:2018-09-08
  • 通讯作者: 邢新,博士,教授,解放军第二军医大学附属长海医院整形外科,上海市 200433
  • 作者简介:李雪阳,女,1978年生,汉族,江苏省徐州市人,在读博士,副主任医师,主要从事皮肤难愈创面、脂肪干细胞修复相关研究。
  • 基金资助:

    徐州市科技局课题(KC15SH087)

HGF/c-Met axis regulates human adipose tissue-derived stem cells in burn wound healing

Li Xue-yang1, 2, Zheng Wan-ling2, Yang Chao1, Xia Si-zhan2, Xing Xin1   

  1. 1Department of Plastic Surgery, Changhai Hospital, Second Military Medical University, Shanghai 200433, China; 2Department of Plastic Surgery, Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, Jiangsu Province, China
  • Revised:2018-03-03 Online:2018-09-08 Published:2018-09-08
  • Contact: Xing Xin, M.D., Professor, Department of Plastic Surgery, Changhai Hospital, Second Military Medical University, Shanghai 200433, China
  • About author:Li Xue-yang, Doctoral candidate, Associate chief physician, Department of Plastic Surgery, Changhai Hospital, Second Military Medical University, Shanghai 200433, China; Department of Plastic Surgery, Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, Jiangsu Province, China
  • Supported by:

    the Project of Xuzhou Municipal Office of Science and Technology, No. KC15SH087

摘要:

文章快速阅读:

文题释义:
转染:
将携带外源基因的病毒感染受体细胞的方法。常规转染技术可分为两大类,一类是瞬时转染,一类是稳定转染。前者外源 DNA/RNA不整合到宿主染色体中,因此一个宿主细胞中可存在多个拷贝数,产生高水平的表达,但通常只持续几天,多用于启动子和其他调控元件的分析。转染技术的选择对转染结果影响也很大,许多转染方法需要优化DNA与转染试剂比例、细胞数量、培养及检测时间等。
PI3K/AKT信号通路:广泛存在于各种类型细胞中,连接胞外信号和细胞应答,与下游信号分子作用,参与细胞的生长增殖和分化,在多种疾病的分子机制及治疗研究中受到极大的关注。

 

摘要
背景:
研究发现,肝细胞生长因子(hepatocyte growth factor,HGF)能促进脂肪干细胞增殖迁移,进而促进创面愈合。
目的:观察HGF/c-Met调节脂肪干细胞增殖和迁移的作用机制及其对烧伤创面愈合的影响。
方法:将提取的人脂肪干细胞按实验要求分为空白对照组(未处理的脂肪干细胞)、HGF组(10 μg/L,24 h)、c-Met siRNA + HGF组(10 μg/L,24 h);采用Western blot技术检测c-Met、AKT、p-AKT的蛋白表达,CCK-8和Transwell法分别检测细胞增殖和迁移情况。将12只裸鼠随机分为2组,用99 ℃烫头接触裸鼠背部皮肤5 s,构建直径为1 cm的皮肤Ⅲ度烫伤模型。实验组创面周围皮肤内注射1×106个10 μg/L HGF处理24 h的脂肪干细胞,对照组注射等量未处理的脂肪干细胞。所有裸鼠在实验第7天处死,取新生创面全层皮肤组织,进行苏木精-伊红染色,计算创面愈合率和再上皮化厚度。
结果与结论:①HGF能够诱导c-Met表达(P < 0.05);HGF促进脂肪干细胞的增殖和迁移,c-Met siRNA对脂肪干细胞的增殖与迁移起抑制作用(P < 0.05);HGF促进p-AKT蛋白表达,c-Met siRNA抑制p-AKT蛋白表达;②实验组创面再上皮化厚度大于对照组(P < 0.05),创面愈合率高于对照组(P < 0.05);③结果表明,HGF干预的脂肪干细胞能通过诱导c-Met基因的表达,激活PI3K/AKT信号通路,提高脂肪间充质干细胞的增殖与迁徙能力;HGF干预的脂肪干细胞能促进裸鼠烫伤创面的愈合。

中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程
ORCID:
0000-0003-0170-3114(李雪阳)

关键词: 脂肪间充质干细胞, 肝细胞生长因子, 肝细胞生长因子受体, PI3K/AKT, 增殖, 迁移, 创面愈合, 干细胞

Abstract:

BACKGROUND: Studies have found that hepatocyte growth factor (HGF) can promote proliferation and migration of adipose-derived stem cells (ADSCs) and accelerate wound healing.
OBJECTIVE: To investigate the mechanism of HGF/c-Met on the proliferation and migration of ADSCs and its effects on burn wound healing.
METHODS: ADSCs were separated from subcutaneous adipose tissues and primary cultured. ADSCs untreated were considered as control group. Cells in experimental groups were treated with HGF (10 μg/L, 24 hours) or c-Met siRNA combined with HGF (10 μg/L, 24 hours). Then, western blot assay was used to detect expressions of c-Met, p-AKT, and AKT in the cells. The proliferation and migration abilities of ADSCs were observed by cell counting kit-8 and Transwell assay. Twelve nude mice were burned by copper bar at 99 oC for   5 seconds in order to establish animal models of skin III degree burns with the diameter of 1 cm, and then these model mice were randomly divided into experimental and control group (n=6 per group). In control group, only 1×106 ADSCs were injected around the wound, while in experimental group, 1×106 ADSCs transfected with Ad-HGF were injected around the wound. All the mice were killed at  7 days of the experiment, and fresh full-thickness skin wound tissues were taken. Wound healing rate was calculated and the thickness between dermis and epidermis was measured by hematoxylin-eosin staining.
RESULTS AND CONCLUSION: Significant expression of c-Met was induced by HGF (P < 0.05). The proliferation and migration of ADSCs were promoted by HGF but suppressed by c-Met siRNA (P < 0.05). p-AKT expression could be promoted by HGF but inhibited by c-Met siRNA. Compared with the control group, the experimental group showed higher wound healing rate and thickened re-epithelium (P < 0.05). To conclude, the HGF/c-Met axis can promote the proliferation and migration of ADSCs by activating PI3K/AKT pathway, and HGF can accelerate wound healing of burn nude mice.

中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程

Key words: Adipose Tissue, Mesenchymal Stem Cells, Hepatocyte Growth Factor, Wound Healing, Tissue Engineering

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