Orthopedic Institute, Soochow University, Suzhou, Jiangsu, China.
J Tissue Viability. 2011 Nov;20(4):108-20. doi: 10.1016/j.jtv.2009.11.004. Epub 2009 Dec 7.
Fibroblasts are one of the most abundant cell types in connective tissues. These cells are responsible for tissue homeostasis under normal physiological conditions. When tissues are injured, fibroblasts become activated and differentiate into myofibroblasts, which generate large contractions and actively produce extracellular matrix (ECM) proteins to facilitate wound closure. Both fibroblasts and myofibroblasts play a critical role in wound healing by generating traction and contractile forces, respectively, to enhance wound contraction. This review focuses on the mechanisms of force generation in fibroblasts and myofibroblasts and techniques for measuring such cellular forces. Such a topic was chosen specifically because of the dual effects that fibroblasts/myofibroblasts have in wound healing process- a suitable amount of force generation and matrix deposition is beneficial for wound healing; excessive force and matrix production, however, result in tissue scarring and even malfunction of repaired tissues. Therefore, understanding how forces are generated in these cells and knowing exactly how much force they produce may guide the development of optimal protocols for more effective treatment of tissue wounds in clinical settings.
成纤维细胞是结缔组织中最丰富的细胞类型之一。这些细胞在正常生理条件下负责组织稳态。当组织受伤时,成纤维细胞被激活并分化为肌成纤维细胞,肌成纤维细胞产生大的收缩并积极产生细胞外基质 (ECM) 蛋白以促进伤口闭合。成纤维细胞和肌成纤维细胞通过分别产生牵引力和收缩力来促进伤口收缩,在伤口愈合中都起着关键作用。本综述重点介绍了成纤维细胞和肌成纤维细胞产生力的机制以及测量这种细胞力的技术。之所以选择这样一个主题,是因为成纤维细胞/肌成纤维细胞在伤口愈合过程中有双重作用——适量的力生成和基质沉积有利于伤口愈合;然而,过多的力和基质产生会导致组织瘢痕形成,甚至修复组织的功能障碍。因此,了解这些细胞中力是如何产生的,以及确切知道它们产生了多少力,可能有助于指导制定最佳方案,以便在临床环境中更有效地治疗组织创伤。