Regulatory role and related mechanism of skin gamma-delta T cell subsets in wound re-epithelialization
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摘要:
再上皮化过程是决定皮肤创面愈合进程的核心环节之一。表皮干细胞增殖分化形成新生表皮组织是再上皮化的组织学基础,而表皮干细胞—前体细胞—终末细胞这一细胞分化过程顺利进行是新生表皮组织不断形成的细胞学基础。表皮干细胞增殖及分化为前体细胞是新生表皮组织增殖潜力的决定因素,而前体细胞扩增及分化为终末细胞是决定新生表皮组织形成速度的关键因素。组织微环境在创面再上皮化过程中发挥关键的调控作用,而细胞生长因子和炎症介质是构成创面组织微环境的2个重要组成成分,分别在表皮干细胞增殖分化的不同环节发挥调节作用,协同促进创面再上皮化顺利进行。γδT细胞是皮肤免疫系统中的重要组成部分,其不同亚群分别通过分泌生长因子和炎症因子在动态塑造早期创面微环境中起关键作用。本文从创面免疫微环境的角度出发,简要论述皮肤γδT细胞在维持表皮干细胞增殖分化平衡以及调控创面再上皮化中的作用,为难愈性创面的预防及治疗提供新方向。
Abstract:Re-epithelialization is one of the core links that determines the healing process of skin wounds. The proliferation and differentiation of epidermal stem cells to form new epidermal tissue is the histological basis of re-epithelialization, and the smooth progress of the cell differentiation process of epidermal stem cells-precursor cells-terminal cells is the cytological basis for the continuous formation of new epidermal tissue. The proliferation of stem cells and their differentiation into precursor cells are the determinants of the proliferative potential of newly formed epidermal tissue, while the expansion and differentiation of precursor cells into terminal cells are key factors determining the rate of new epidermal tissue formation. The tissue microenvironment plays a key regulatory role in the process of wound re-epithelialization, and cell growth factor and inflammatory mediators are the two main components of tissue microenvironment, which play regulatory role in different aspects of proliferation and differentiation of epidermal stem cells, jointly promoting the smooth progress of wound re-epithelialization As an important part of skin immune system, the subsets of gamma-delta (γδ) T cells play crucial role in dynamically shaping early wound microenvironment via secreting different cell growth factors and inflammatory factors. From the prospective of immune microenvironment of wound, this paper discusses the role of skin γδ T cells in maintaining the balance of stem cell proliferation and differentiation and regulating wound re-epithelialization, providing a new direction for the prevention and treatment of refractory wound.
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Key words:
- Skin /
- Wound healing /
- Re-epitheliali- zation /
- Epidermal stem cells /
- Immune microenvironment /
- Gamma-delta T cells
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参考文献
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