Jakhu Harpal, Gill Gurveen, Singh Amarjot
Department of Endodontics, Government Dental College, Amritsar, Punjab, India.
Sandalwood Smiles, Private Dental Practice, Brampton, Ontario, Canada.
J Oral Biol Craniofac Res. 2018 May-Aug;8(2):122-125. doi: 10.1016/j.jobcr.2018.01.002. Epub 2018 Feb 14.
Wound healing in human periodontium is a complex process which involves both cell-cell and cell-matrix interactions. Integrins play a major role in regulation of these cell-cell, cell-matrix interaction. Wound healing involves two major events i.e. re-epithelialization and connective tissue repair. In this concise review, we will discuss the role of integrins in these major events as well as their impIications in periodontal wound repair. Integrins are differentially expressed in both of these major events. In re-epithelialization, keratinocytes express novel integrins receptors αvβ1, α5β1and αvβ6 which are not expressed in normal healthy epithelium. Re-epithelialization also involves interaction of integrins with TGF-β and fibronectin. Similarly, in connective tissue repair, the activation of fibroblast as well as the expression of integrins α5β1 and α3β1 is upregulated. In healthy periodontium, integrin αvβ6 is normally expressed in junctional epithelium which is generally expressed only at wound sites in other parts of the body. The epithelialization at implant surface has not been yet fully explored with respect to interactions among integrins and other extra-cellular matrix molecules.
人类牙周组织的伤口愈合是一个复杂的过程,涉及细胞与细胞以及细胞与基质的相互作用。整合素在调节这些细胞与细胞、细胞与基质的相互作用中起主要作用。伤口愈合涉及两个主要事件,即重新上皮化和结缔组织修复。在这篇简要综述中,我们将讨论整合素在这些主要事件中的作用以及它们在牙周伤口修复中的意义。整合素在这两个主要事件中表达不同。在重新上皮化过程中,角质形成细胞表达新的整合素受体αvβ1、α5β1和αvβ6,这些受体在正常健康上皮中不表达。重新上皮化还涉及整合素与转化生长因子-β和纤连蛋白的相互作用。同样,在结缔组织修复中,成纤维细胞的激活以及整合素α5β1和α3β1的表达上调。在健康的牙周组织中,整合素αvβ6通常在结合上皮中表达,而结合上皮通常仅在身体其他部位的伤口部位表达。关于整合素与其他细胞外基质分子之间的相互作用,植入物表面的上皮化尚未得到充分研究。