Department of Pathology and Cell Biology, University of Montreal and Research Center, Maisonneuve-Rosemont Hospital, Montreal, Quebec, Canada.
Departmentof Biology and Human Biology, University of Haifa, Haifa, Israel.
Am J Physiol Cell Physiol. 2020 Sep 1;319(3):C510-C532. doi: 10.1152/ajpcell.00181.2020. Epub 2020 Jul 15.
Neutrophils are polymorphonuclear leukocytes that play a central role in host defense against infection and tissue injury. They are rapidly recruited to the inflamed site and execute a variety of functions to clear invading pathogens and damaged cells. However, many of their defense mechanisms are capable of inflicting collateral tissue damage. Neutrophil-driven inflammation is a unifying mechanism underlying many common diseases. Efficient removal of neutrophils from inflammatory loci is critical for timely resolution of inflammation and return to homeostasis. Accumulating evidence challenges the classical view that neutrophils represent a homogeneous population and that halting neutrophil influx is sufficient to explain their rapid decline within inflamed loci during the resolution of protective inflammation. Hence, understanding the mechanisms that govern neutrophil functions and their removal from the inflammatory locus is critical for minimizing damage to the surrounding tissue and for return to homeostasis. In this review, we briefly address recent advances in characterizing neutrophil phenotypic and functional heterogeneity and the molecular mechanisms that determine the fate of neutrophils within inflammatory loci and the outcome of the inflammatory response. We also discuss how these mechanisms may be harnessed as potential therapeutic targets to facilitate resolution of inflammation.
中性粒细胞是多形核白细胞,在宿主防御感染和组织损伤中起着核心作用。它们被迅速募集到炎症部位,并执行多种功能,以清除入侵的病原体和受损细胞。然而,它们的许多防御机制能够造成附带的组织损伤。中性粒细胞驱动的炎症是许多常见疾病的统一机制。从炎症部位有效清除中性粒细胞对于及时缓解炎症和恢复体内平衡至关重要。越来越多的证据挑战了中性粒细胞代表同质群体的经典观点,并且认为阻止中性粒细胞的流入足以解释它们在保护性炎症缓解过程中在炎症部位的快速减少。因此,了解控制中性粒细胞功能及其从炎症部位清除的机制对于最大限度地减少周围组织的损伤和恢复体内平衡至关重要。在这篇综述中,我们简要讨论了最近在描述中性粒细胞表型和功能异质性方面的进展,以及决定中性粒细胞在炎症部位的命运和炎症反应结果的分子机制。我们还讨论了如何利用这些机制作为潜在的治疗靶点,以促进炎症的缓解。
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