微生物肽模擬物可導致致命性炎性心肌病
作者:
小柯機器人發布時間:2019/11/15 12:40:57
瑞士免疫生物學研究所Burkhard Ludewig研究組的最新研究,揭示了微生物來源的肽模擬物可導致致命的炎性心肌病。該項研究成果發表在11月15日出版的《科學》上。
使用自發性自身免疫性心肌炎的小鼠模型,研究人員證明,心肌炎向致死性心臟病的發展過程,取決於與其共生的擬桿菌屬肽模擬物,在腸心肌肌球蛋白特異性T輔助細胞(TH)17細胞的印記。抗生素成功預防小鼠致死性疾病,和在人心肌炎患者中觀察到的明顯擬桿菌特異的CD4 + T細胞和B細胞均表明,共生細菌的模擬肽可促進遺傳易感個體炎症性心肌病的發生。通過操縱微生物組,來抑制心臟毒性T細胞產生,將使炎症性心肌病轉化為可靶向的疾病。
據了解,心肌炎可通過長期刺激肌球蛋白重鏈6特異性TH1和TH17細胞發展為炎性心肌病。但是,控制心臟特異性T細胞心臟毒性的機制仍然未知。
附:英文原文
Title: Microbiota-derived peptide mimics drive lethal inflammatory cardiomyopathy
Author: Cristina Gil-Cruz, Christian Perez-Shibayama, Angelina De Martin, Francesca Ronchi, Katrien van der Borght, Rebekka Niederer, Lucas Onder, Mechthild Lütge, Mario Novkovic, Veronika Nindl, Gustavo Ramos, Markus Arnoldini, Emma M.C. Slack, Valérie Boivin-Jahns, Roland Jahns, Madeleine Wyss, Catherine Mooser, Bart N. Lambrecht, Micha T. Maeder, Hans Rickli, Lukas Flatz, Urs Eriksson, Markus B. Geuking, Kathy D. McCoy, Burkhard Ludewig
Issue&Volume: 2019/11/15
Abstract: Myocarditis can develop into inflammatory cardiomyopathy through chronic stimulation of myosin heavy chain 6–specific T helper (TH)1 and TH17 cells. However, mechanisms governing the cardiotoxicity programming of heart-specific T cells have remained elusive. Using a mouse model of spontaneous autoimmune myocarditis, we show that progression of myocarditis to lethal heart disease depends on cardiac myosin–specific TH17 cells imprinted in the intestine by a commensal Bacteroides species peptide mimic. Both the successful prevention of lethal disease in mice by antibiotic therapy and the significantly elevated Bacteroides-specific CD4+ T cell and B cell responses observed in human myocarditis patients suggest that mimic peptides from commensal bacteria can promote inflammatory cardiomyopathy in genetically susceptible individuals. The ability to restrain cardiotoxic T cells through manipulation of the microbiome thereby transforms inflammatory cardiomyopathy into a targetable disease.
DOI: 10.1126/science.aav3487
Source:https://science.sciencemag.org/content/366/6467/881
Science:《科學》,創刊於1880年。隸屬於美國科學促進會,最新IF:41.037