J Clin Invest. 2018 Jan 2;128(1):97-107. doi: 10.1172/JCI93563.
Fibrosis is the excessive accumulation of extracellular matrix that often occurs as a wound healing response to repeated or chronic tissue injury, and may lead to the disruption of organ architecture and loss of function. Although fibrosis was previously thought to be irreversible, recent evidence indicates that certain circumstances permit the resolution of fibrosis when the underlying causes of injury are eradicated. The mechanism of fibrosis resolution encompasses degradation of the fibrotic extracellular matrix as well as elimination of fibrogenic myofibroblasts through their adaptation of various cell fates, including apoptosis, senescence, dedifferentiation, and reprogramming. In this Review, we discuss the present knowledge and gaps in our understanding of how matrix degradation is regulated and how myofibroblast cell fates can be manipulated, areas that may identify potential therapeutic approaches for fibrosis.
纤维化是细胞外基质的过度积累,通常发生在组织反复或慢性损伤的愈合反应中,可能导致器官结构的破坏和功能丧失。虽然纤维化以前被认为是不可逆转的,但最近的证据表明,在损伤的根本原因被消除的情况下,某些情况下允许纤维化的消退。纤维化消退的机制包括纤维化细胞外基质的降解以及通过肌成纤维细胞的各种细胞命运的适应来消除肌成纤维细胞,包括细胞凋亡、衰老、去分化和重编程。在这篇综述中,我们讨论了目前对基质降解如何受到调控以及肌成纤维细胞的细胞命运如何被操纵的认识上的空白,这些领域可能为纤维化的潜在治疗方法提供线索。