中国组织工程研究 ›› 2022, Vol. 26 ›› Issue (10): 1555-1560.doi: 10.12307/2022.203

• 细胞外基质材料 extracellular matrix materials • 上一篇    下一篇

真皮细胞外基质水凝胶促进大鼠急性皮肤创面修复

董鸿斐 1,2,黄启林 2,杨  熊 2,李  帅 2,古  瑞 2,孙红玉 2,汤礼军 1,2   

  1. 1西南医科大学临床医学院,四川省泸州市   646000;2西部战区总医院全军普通外科中心,四川省胰腺损伤与修复重点实验室,四川省成都市 610083
  • 收稿日期:2020-10-10 修回日期:2020-10-13 接受日期:2020-11-21 出版日期:2022-04-08 发布日期:2021-10-25
  • 通讯作者: 汤礼军,博士,主任医师,西南医科大学临床医学院,四川省泸州市 646000;西部战区总医院全军普通外科中心,四川省胰腺损伤与修复重点实验室,四川省成都市 610083
  • 作者简介:董鸿斐,男,1989年生,甘肃省天水市人,汉族,硕士,主要从事腹部外伤相关疾病的治疗与发病机制研究
  • 基金资助:
    国家临床重点专科军队建设项目(41732113),项目负责人:汤礼军;腹部创伤分级救治及器官功能修复系列研究(2019LH04),项目负责人:孙红玉

Dermal extracellular matrix hydrogel in promoting acute skin wound healing in rats

Dong Hongfei1, 2, Huang Qilin2, Yang Xiong2, Li Shuai2, Gu Rui2, Sun Hongyu2, Tang Lijun1, 2   

  1. 1Department of School of Clinical Medicine, Southwest Medical University, Luzhou 646000, Sichuan Province, China; 2Department of General Surgery & Pancreatic Injury and Repair Key Laboratory of Sichuan Province, General Hospital of Western Theater Command, Chengdu 610083, Sichuan Province, China 
  • Received:2020-10-10 Revised:2020-10-13 Accepted:2020-11-21 Online:2022-04-08 Published:2021-10-25
  • Contact: Tang Lijun, MD, Chief physician, Department of School of Clinical Medicine, Southwest Medical University, Luzhou 646000, Sichuan Province, China; Department of General Surgery & Pancreatic Injury and Repair Key Laboratory of Sichuan Province, General Hospital of Western Theater Command, Chengdu 610083, Sichuan Province, China
  • About author:Dong Hongfei, Master, Department of School of Clinical Medicine, Southwest Medical University, Luzhou 646000, Sichuan Province, China; Department of General Surgery & Pancreatic Injury and Repair Key Laboratory of Sichuan Province, General Hospital of Western Theater Command, Chengdu 610083, Sichuan Province, China
  • Supported by:
    the Military Construction Project for National Clinical Key Speciality, No. 41732113 (to TLJ); the Series Study on Graded Treatment of Abdominal Trauma and Organ Function Repair, No. 2019LH04 (to SHY) 

摘要: 文题释义:
真皮细胞外基质:是动物皮肤组织通过物理和化学方法方法处理去除其表皮及真皮层内细胞成分后,所保留下来的完整的细胞外基质成分,主要成分包括胶原蛋白、透明质酸、糖胺聚糖和弹性蛋白等。
温敏性可注射水凝胶:通过冻干、酶消化的方法将细胞外基质制成温度敏感性可注射水凝胶,即在室温下为液体状态,在37 ℃时可凝固为胶冻样,可用于局部组织内注射并持续发挥作用。

背景:真皮细胞外基质(dermal extracellular matrix,d-ECM)已在临床创面修复中广泛使用,但真皮细胞外基质水凝胶(dermal extracellular matrix hydrogel,d-ECMH)是否可改善急性皮肤创面愈合目前尚缺乏相关研究。
目的:探讨d-ECMH对大鼠急性皮肤创面的促愈合作用及机制。
方法:将24只SD大鼠采用随机数字表法分为模型组、d-ECM组及d-ECMH组,每组8只。所有大鼠先建立全层皮肤缺损模型,模型组与d-ECMH组在创面与创缘分别注射PBS、d-ECMH,d-ECM组创面覆盖真皮细胞外基质,观察并评估创面愈合情况。14 d时处死所有大鼠,取其创面处皮肤组织进行苏木精-伊红染色、Masson 染色、免疫组织化学染色及免疫荧光染色。实验获得西部战区总医院动物伦理委员会批准。

结果与结论:①各组大鼠创面均随治疗时间延长而缩小,d-ECMH组术后14 d的创面愈合率与创面上皮化率高于d-ECM组、模型组(P < 0.05),创面挛缩比率低于d-ECM组、模型组(P < 0.05);②苏木精-伊红染色显示,相比模型组与d-ECM组,d-ECMH组皮肤创面修复更好,创面再上皮化程度更高,形成了新的皮肤附属器(如毛囊),真皮部分的基质更加整齐;③Masson染色显示,相比模型组与d-ECM组,d-ECMH组皮肤创面组织中胶原纤维明显增多且粗大;④免疫组化染色显示,d-ECMH组新生毛细血管数量多于模型组、d-ECM组(P < 0.05),肿瘤坏死因子α与白细胞介素6含量低于模型组、d-ECM组(P < 0.05);⑤免疫荧光染色显示,d-ECMH组新生创面内的M2型巨噬细胞数多于模型组及d-ECM组(P < 0.05),M1型巨噬细胞数少于模型组、d-ECM组(P < 0.05);⑥结果表明,d-ECMH可加速皮肤创面愈合,促进创面再上皮化,减轻创面挛缩,可能与促进创面内毛细血管新生与胶原纤维生成、减轻炎症、调控巨噬细胞向M2极化有关。

https://orcid.org/0000-0002-4315-8145 (董鸿斐) 


关键词: 材料, 细胞外基质, 水凝胶, 创面修复, 巨噬细胞极化, 皮肤, 血管新生

Abstract: BACKGROUND: Dermal extracellular matrix (d-ECM) has been widely used in clinical wound repair, but whether dermal extracellular matrix hydrogel (d-ECMH) can improve acute skin wound healing is still a lack of relevant research.
OBJECTIVE: To explore the healing effect and mechanism of d-ECMH on acute skin wounds in rats.
METHODS: Twenty-four SD rats were divided into model group, d-ECM group and d-ECMH group by random number table method, with 8 rats in each group. Firstly, all rats established a full-thickness skin defect model, and then the model group and d-ECMH group were immediately injected with equal volumes of PBS buffer and d-ECMH on the wound respectively after the operation, and the wound surface of the d-ECM group was covered with d-ECM to observe and evaluate wound healing. All rats were sacrificed on day 14, and the skin tissues of the wounds were subjected to hematoxylin-eosin staining, Masson staining, histoimmunochemistry and fluorescence staining. The experiment was approved by Animal Ethics Committee of General Hospital of Western Theater Command.
RESULTS AND CONCLUSION: (1) The wound of rats in each group shrank with the prolongation of treatment time. Compared with the model group and the d-ECM group, the d-ECMH group had higher wound healing rate and wound surface skinization rate (P < 0.05), and reduced wound contracture rate (P < 0.05). (2) Hematoxylin-eosin staining showed that compared with the model group and the d-ECM group, the d-ECMH group had better skin wound repair and a higher degree of re-epithelialization of the wound, forming new skin appendages (such as hair follicles), and the matrix of dermis was more uniform. (3) Masson staining results showed that compared with the model and the d-ECM groups, the collagen fibers in the skin wound tissue were significantly increased and thicker in the d-ECMH group. (4) Immunohistochemical staining showed that the number of new capillaries in the skin wound tissue of the d-ECMH group was significantly more than that of the model group and d-ECM group (P < 0.05). The contents of tumor necrosis factor-α and interleukin-6 in wound tissues of the d-ECMH group were significantly lower than those in the model group and d-ECM group (P < 0.05). (5) Immunofluorescence staining showed that the number of M2 macrophages in the new wounds of the d-ECMH group was significantly higher than that of the model group and d-ECM group (P < 0.05), while the number of M1 macrophages was significantly lower than that of the model group and d-ECM group (P < 0.05). (6) The results show that d-ECMH can accelerate skin wound healing, promote wound re-epithelialization, and reduce wound contracture, which may be related to promote capillary angiogenesis and collagen fiber production, reduce inflammation and regulate the polarization of macrophages to M2 in the wound. 

Key words: material, extracellular matrix, hydrogel, wound repair, macrophage polarization, skin, angiogenesis

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