中性粒細胞胞外陷阱靶向衰老血管系統在視網膜病變組織重塑中的作用
作者:
小柯機器人發布時間:2020/8/21 16:18:53
加拿大蒙特婁眼科Przemyslaw Sapieha研究團隊近日取得一項新成果。經過不懈努力,他們揭示了中性粒細胞胞外陷阱目標衰老血管在視網膜病變組織重塑中的作用。 2020年8月21日出版的《科學》發表了這項成果。
研究團隊對患有增生性糖尿病性視網膜病變的人類患者和缺血性視網膜病變的小鼠模型使用正交方法,鑑定嗜中性粒細胞在晚期無菌炎症過程中血管重構中的非常規作用。衰老的血管系統釋放了一個吸引中性粒細胞並觸發中性粒細胞胞外誘捕器(NETs)產生的分泌組。
NET最終清除了患病的內皮細胞並改造了不健康的血管。 NETosis的遺傳或藥理抑制作用阻止衰老血管的退化和疾病的延長。因此,清除衰老的視網膜血管會導致修復性血管重塑。
研究人員表示,在發達國家失明的主要原因是糖尿病性視網膜病等血管系統紊亂,可能會纖維化。儘管許多此類病理性血管通常會自然退縮並避免視力受損的併發症,但其潛在機制仍然未知。本研究提供了基本理解。
附:英文原文
Title: Neutrophil extracellular traps target senescent vasculature for tissue remodeling in retinopathy
Author: Franois Binet, Gael Cagnone, Sergio Crespo-Garcia, Masayuki Hata, Mathieu Neault, Agnieszka Dejda, Ariel M. Wilson, Manuel Buscarlet, Gaelle Tagne Mawambo, Joel P. Howard, Roberto Diaz-Marin, Celia Parinot, Vera Guber, Frédérique Pilon, Rachel Juneau, Rémi Laflamme, Christina Sawchyn, Karine Boulay, Severine Leclerc, Afnan Abu-Thuraia, Jean-Franois Cté, Gregor Andelfinger, Flavio A. Rezende, Florian Sennlaub, Jean-Sébastien Joyal, Frédérick A. Mallette, Przemyslaw Sapieha
Issue&Volume: 2020/08/21
Abstract: In developed countries, the leading causes of blindness such as diabetic retinopathy are characterized by disorganized vasculature that can become fibrotic. Although many such pathological vessels often naturally regress and spare sight-threatening complications, the underlying mechanisms remain unknown. Here, we used orthogonal approaches in human patients with proliferative diabetic retinopathy and a mouse model of ischemic retinopathies to identify an unconventional role for neutrophils in vascular remodeling during late-stage sterile inflammation. Senescent vasculature released a secretome that attracted neutrophils and triggered the production of neutrophil extracellular traps (NETs). NETs ultimately cleared diseased endothelial cells and remodeled unhealthy vessels. Genetic or pharmacological inhibition of NETosis prevented the regression of senescent vessels and prolonged disease. Thus, clearance of senescent retinal blood vessels leads to reparative vascular remodeling.
DOI: 10.1126/science.aay5356
Source: https://science.sciencemag.org/content/369/6506/eaay5356
Science:《科學》,創刊於1880年。隸屬於美國科學促進會,最新IF:41.037