半胱氨酸蛋白酶6是先天免疫、炎症激活和宿主防禦的關鍵調節因子
作者:
小柯機器人發布時間:2020/4/18 9:24:39
美國聖裘德兒童研究醫院Thirumala-Devi Kanneganti研究組的一項最新工作表明,半胱氨酸蛋白酶6是先天免疫、炎症激活和宿主防禦的關鍵調節因子。2020年4月15日,國際知名學術期刊《細胞》在線發表了這一成果。
研究人員發現,半胱氨酸蛋白酶6介導先天免疫和炎性體激活。此外,他們證明,半胱氨酸蛋白酶6促進程序性細胞死亡途徑的激活,包括焦磷酸化、凋亡和壞死(PANoptosis),並在抵抗甲型流感病毒(IAV)的宿主防禦中起重要作用。
另外,半胱氨酸蛋白酶6促進了選擇性激活巨噬細胞(AAM)的分化。 半胱氨酸蛋白酶6通過其與RIPK3的相互作用,促進了RIPK3與ZBP1的RIP同型相互作用基序(RHIM)依賴性結合。
總之,這些發現揭示了半胱氨酸蛋白酶6在IAV感染過程中促進ZBP1介導的炎症小體激活、細胞死亡和宿主防禦等方面中的關鍵作用,並為治療傳染性和自發性疾病及癌症開闢了新途徑。
據介紹,半胱氨酸蛋白酶調節細胞死亡、免疫反應和體內平衡。半胱氨酸蛋白酶6被定義為執行者半胱氨酸蛋白酶,但表現出與其他執行者的明顯區別。總體而言,除了凋亡外,人們對半胱氨酸蛋白酶6在生物過程中的功能了解甚少。
附:英文原文
Title: Caspase-6 Is a Key Regulator of Innate Immunity, Inflammasome Activation, and Host Defense
Author: Min Zheng, Rajendra Karki, Peter Vogel, Thirumala-Devi Kanneganti
Issue&Volume: 2020-04-15
Abstract: Caspases regulate cell death, immune responses, and homeostasis. Caspase-6 is categorizedas an executioner caspase but shows key differences from the other executioners. Overall,little is known about the functions of caspase-6 in biological processes apart fromapoptosis. Here, we show that caspase-6 mediates innate immunity and inflammasomeactivation. Furthermore, we demonstrate that caspase-6 promotes the activation ofprogrammed cell death pathways including pyroptosis, apoptosis, and necroptosis (PANoptosis)and plays an essential role in host defense against influenza A virus (IAV) infection.In addition, caspase-6 promoted the differentiation of alternatively activated macrophages(AAMs). Caspase-6 facilitated the RIP homotypic interaction motif (RHIM)-dependentbinding of RIPK3 to ZBP1 via its interaction with RIPK3. Altogether, our findingsreveal a vital role for caspase-6 in facilitating ZBP1-mediated inflammasome activation,cell death, and host defense during IAV infection, opening additional avenues fortreatment of infectious and autoinflammatory diseases and cancer.
DOI: 10.1016/j.cell.2020.03.040
Source: https://www.cell.com/cell/fulltext/S0092-8674(20)30333-0
Cell:《細胞》,創刊於1974年。隸屬於細胞出版社,最新IF:36.216