中国组织工程研究 ›› 2026, Vol. 30 ›› Issue (13): 3242-3249.doi: 10.12307/2026.058

• 骨髓干细胞 bone marrow stem cells • 上一篇    下一篇

趋化因子受体7-骨髓间充质干细胞复合猪小肠黏膜下层促进大鼠皮肤损伤修复

范美荣,李光琪,宋旭梅,闫  昕,随瑞枝   

  1. 宁夏医科大学总医院医学实验中心,宁夏回族自治区银川市   750004
  • 收稿日期:2025-03-06 修回日期:2025-05-07 接受日期:2025-05-29 出版日期:2026-05-08 发布日期:2025-12-24
  • 通讯作者: 范美荣,硕士,主管技师,宁夏医科大学总医院医学实验中心,宁夏回族自治区银川市 750004
  • 作者简介:范美荣,女,1987年生,宁夏回族自治区银川市人,汉族,2013年四川大学华西医院毕业,硕士,主要从事组织工程相关研究。
  • 基金资助:
    宁夏回族自治区自然科学基金项目(2023AAC03616),项目负责人:范美荣;宁夏回族自治区干细胞与再生医学重点实验室开放课题(KF202409),项目负责人:范美荣

Chemokine receptor 7-bone marrow mesenchymal stem cells combined with porcine small intestinal submucosa promote skin repair in rats

Fan Meirong, Li Guangqi, Song Xumei, Yan Xin, Sui Ruizhi   

  1. Medical Experimental Center, General Hospital of Ningxia Medical University, Yinchuan 750004, Ningxia Hui Autonomous Region, China
  • Received:2025-03-06 Revised:2025-05-07 Accepted:2025-05-29 Online:2026-05-08 Published:2025-12-24
  • Contact: Fan Meirong, MS, Chief technician, Medical Experimental Center, General Hospital of Ningxia Medical University, Yinchuan 750004, Ningxia Hui Autonomous Region, China
  • About author:Fan Meirong, MS, Medical Experimental Center, General Hospital of Ningxia Medical University, Yinchuan 750004, Ningxia Hui Autonomous Region, China
  • Supported by:
    Natural Science Foundation of Ningxia Hui Autonomous Region, No. 2023AAC03616 (to FMR); Open Research Fund of Ningxia Key Laboratory of Stem Cells and Regenerative Medicine, No. KF202409 (to FMR)

摘要:

文题释义:

猪小肠黏膜下层:通过去除猪小肠的浆膜层、肌层、黏膜层,以及经过一系列加工和消毒等处理后获得的天然细胞外基质类生物材料,其主要组成成分包括胶原、纤维粘连蛋白、黏多糖及蛋白多糖等物质,具有良好的细胞相容性、抗微生物活性、促进组织特异性诱导再生等特点。
趋化因子受体7:是趋化因子受体家族的成员之一,近年来的研究证实在多种肿瘤细胞中过表达,趋化因子受体7通过与相应趋化因子结合后可以促进细胞增殖及新生血管生成。

摘要
背景:临床上对于皮肤损伤修复常用的自体及异体皮肤移植效果都不甚理想。近年来组织工程的发展为皮肤修复带来了新的希望,然而在皮肤组织工程中血管的再生一直是一个难题。猪小肠黏膜下层和骨髓间充质干细胞是当前广泛用于组织工程研究的天然细胞外基质类支架材料和种子细胞,趋化因子受体7是一种可以促发新生血管生成的细胞因子。
目的:观察趋化因子受体7-骨髓间充质干细胞-猪小肠黏膜下层膜对大鼠背部皮肤损伤的修复效果及血管再生能力。
方法:①过表达趋化因子受体7腺病毒载体转染骨髓间充质干细胞,Western blot及RT-qPCR方法评价转染效果;②将过表达趋化因子受体7的骨髓间充质干细胞与猪小肠黏膜下层复合培养,通过扫描电镜观察及活死细胞染色验证细胞相容性;③12只SD大鼠构建皮肤缺损动物模型,分别将趋化因子受体7-骨髓间充质干细胞-猪小肠黏膜下层(实验组)和猪小肠黏膜下层(对照组)置于大鼠皮肤缺损处,造模后1,3,7,14 d观察创面愈合情况,造模后7,14 d采用Western blot检测创面愈合组织中血管内皮生长因子蛋白表达,免疫组化染色检测创面组织CD31及增殖细胞核抗原蛋白表达。
结果与结论:①通过腺病毒介导成功构建过表达趋化因子受体7的骨髓间充质干细胞,趋化因子受体7转染组细胞内趋化因子受体7的蛋白、mRNA表达均较对照组和空载组明显上调(P < 0.001);②扫描电镜观察及活死细胞染色实验结果显示过表达趋化因子受体7的骨髓间充质干细胞在猪小肠黏膜下层膜表面生长良好,二者具有良好的相容性;③与对照组相比,实验组创面面积明显缩小(P < 0.05),实验组创面愈合组织中血管内皮生长因子、CD31、增殖细胞核抗原的蛋白表达高于对照组(P < 0.05),表明趋化因子受体7-骨髓间充质干细胞-猪小肠黏膜下层膜的促创面血管生成能力较强。

关键词: 趋化因子受体7, 骨髓间充质干细胞, 腺病毒, 猪小肠黏膜下层, 皮肤修复, 血管生成

Abstract: BACKGROUND: The clinical outcomes of autologous and allogeneic skin transplants, which are commonly used for repairing skin lesions, are often suboptimal. In recent years, advancements in tissue engineering have provided new hope for skin repair. Nevertheless, the regeneration of blood vessels within skin tissue engineering remains a significant challenge. Porcine small intestinal submucosa and bone marrow-derived mesenchymal stem cells are widely utilized natural extracellular matrix biomaterials and seed cells in current tissue engineering research. Chemokine receptor 7 is a cytokine that can promote angiogenesis.
OBJECTIVE: To observe the repair effect and angiogenesis ability of chemokine receptor 7-bone marrow mesenchymal stem cells-porcine small intestinal submucosa membrane on rat back skin damage.
METHODS: (1) The adenovirus vector overexpressing chemokine receptor 7 was used to transfect bone marrow mesenchymal stem cells. The transfection efficiency was evaluated using western blot assay and RT-qPCR. (2) The bone marrow mesenchymal stem cells overexpressing chemokine receptor 7 were co-cultured with porcine small intestinal submucosa. Cytocompatibility was assessed through scanning electron microscopy and live/dead cell staining. (3) 12 SD rats were utilized to establish a skin defect animal experimental model, and chemokine receptor 7-bone marrow mesenchymal stem cells-porcine small intestinal submucosa (experimental group) and porcine small intestinal submucosa (control group) were placed in the rat skin defect, and the wound healing was observed 1, 3, 7, and 14 days after modeling. The expression of vascular endothelial growth factor protein in the wound healing tissue was detected by western blot assay at 7 and 14 days after modeling, and the expression of CD31 and proliferating cell nuclear antigen protein in the wound tissue was detected by immunohistochemical staining.
RESULTS AND CONCLUSION: (1) Bone marrow mesenchymal stem cells overexpressing chemokine receptor 7 were successfully constructed by adenovirus-mediated transfection. The protein and mRNA expressions of chemokine receptor 7 in the chemokine receptor 7 transfected group were significantly upregulated compared with those in the control group and the empty vector group (P < 0.001). (2) Scanning electron microscopy observation and live-dead cell staining results showed that bone marrow mesenchymal stem cells overexpressing chemokine receptor 7 grew well on the surface of the submucosal membrane of the porcine small intestine, and the two had good compatibility. (3) Compared with the control group, the wound area of the experimental group was significantly reduced (P < 0.05). The protein expression levels of vascular endothelial growth factor, CD31, and proliferating cell nuclear antigen in the wound healing tissue of the experimental group were higher than those in the control group (P < 0.05), indicating that the ability of chemokine receptor 7-bone marrow mesenchymal stem cells-porcine small intestinal submucosal membrane to promote wound angiogenesis was strong. 

Key words: chemokine receptor 7, bone marrow derived mesenchymal stem cell, adenovirus, porcine small intestinal submucosa, skin repair, angiogenesis

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