整合素介导的表皮伤口功能调节。
Integrin-mediated regulation of epidermal wound functions.
作者信息
DiPersio C Michael, Zheng Rui, Kenney James, Van De Water Livingston
机构信息
Department of Surgery, Albany Medical College, Albany, NY, 12208, USA.
Department of Regenerative & Cancer Cell Biology, Albany Medical College, Mail Code 165, Room MR-421, 47 New Scotland Avenue, Albany, NY, 12208-3479, USA.
出版信息
Cell Tissue Res. 2016 Sep;365(3):467-82. doi: 10.1007/s00441-016-2446-2. Epub 2016 Jun 28.
During cutaneous wound healing, keratinocyte proliferation and migration are critical for re-epithelialization. In addition the epidermis secretes growth factors, cytokines, proteases, and matricellular proteins into the wound microenvironment that modify the extracellular matrix and stimulate other wound cells that control the inflammatory response, promote angiogenesis and facilitate tissue contraction and remodeling. Wound keratinocytes express at least seven different integrins-the major cell adhesion receptors for the extracellular matrix-that collectively control essential cell-autonomous functions to ensure proper re-epithelialization, including migration, proliferation, survival and basement membrane assembly. Moreover, it has become evident in recent years that some integrins can regulate paracrine signals from wound epidermis that stimulate other wound cells involved in angiogenesis, contraction and inflammation. Importantly, it is likely that abnormal integrin expression or function in the epidermis contributes to wound pathologies such as over-exuberant healing (e.g., hypertrophic scar formation) or diminished healing (e.g., chronic wounds). In this review, we discuss current knowledge of integrin function in the epidermis, which implicates them as attractive therapeutic targets to promote wound healing or treat wound pathologies. We also discuss challenges that arise from the complex roles that multiple integrins play in wound epidermis, which may be regulated through extracellular matrix remodeling that determines ligand availability. Indeed, understanding how different integrin functions are temporally coordinated in wound epidermis and which integrin functions go awry in pathological wounds, will be important to determine how best to target them clinically to achieve maximum therapeutic benefit. Graphical abstract In addition to their well-characterized roles in keratinocyte adhesion, migration and wound re-epithelialization, epidermal integrins play important roles in modifying the wound microenvironment by regulating the expression and secretion of growth factors, extracellular proteases, and matricellular proteins that stimulate other wound cells, including vascular endothelial cells and fibroblasts/myofibroblasts.
在皮肤伤口愈合过程中,角质形成细胞的增殖和迁移对于重新上皮化至关重要。此外,表皮会向伤口微环境中分泌生长因子、细胞因子、蛋白酶和基质细胞蛋白,这些物质会改变细胞外基质,并刺激其他伤口细胞,从而控制炎症反应、促进血管生成并促进组织收缩和重塑。伤口角质形成细胞表达至少七种不同的整合素——细胞外基质的主要细胞黏附受体——它们共同控制基本的细胞自主功能,以确保正确的重新上皮化,包括迁移、增殖、存活和基底膜组装。此外,近年来已经很明显,一些整合素可以调节来自伤口表皮的旁分泌信号,这些信号会刺激参与血管生成、收缩和炎症的其他伤口细胞。重要的是,表皮中整合素表达或功能异常可能导致伤口病理状况,如过度愈合(例如,肥厚性瘢痕形成)或愈合减弱(例如,慢性伤口)。在这篇综述中,我们讨论了目前关于整合素在表皮中功能的知识,这表明它们是促进伤口愈合或治疗伤口病理状况的有吸引力的治疗靶点。我们还讨论了多种整合素在伤口表皮中发挥的复杂作用所带来的挑战,这些作用可能通过决定配体可用性的细胞外基质重塑来调节。事实上,了解不同整合素功能如何在伤口表皮中进行时间协调,以及哪些整合素功能在病理性伤口中出现异常,对于确定如何在临床上最佳地靶向它们以实现最大治疗益处至关重要。图形摘要 除了在角质形成细胞黏附、迁移和伤口重新上皮化中已明确的作用外,表皮整合素在通过调节生长因子、细胞外蛋白酶和基质细胞蛋白的表达和分泌来改变伤口微环境方面发挥重要作用,这些因子和蛋白会刺激其他伤口细胞,包括血管内皮细胞和成纤维细胞/肌成纤维细胞。