Identification of CX3CR1+ mononuclear phagocyte subsets involved in HIV-1 and SIV colorectal transmission

iScience

Chiara Foglieni¹  Gabriella Scarlatti²  Nathalie Dereuddre-Bosquet³  Naima Hantour⁴  Mariangela Cavarelli⁵  Tilo Schorn⁵  Roger Le Grand⁵  Ugo Elmore⁵  Antonello Ferrazzano⁶  Stefania Dispinseri⁶  Delphine Desjardins⁶ 

[1] Corresponding author;School of Medicine and Surgery, Università Vita-Salute San Raffaele, Milan, Italy;Department of Gastrointestinal Surgery, IRCCS Ospedale San Raffaele, Milan, Italy;Myocardial Diseases and Atherosclerosis Unit, IRCCS Ospedale San Raffaele, Milan, Italy;Université Paris-Saclay, Inserm, CEA, Center for Immunology of Viral, Auto-immune, Hematological and Bacterial Diseases (IMVA-HB/IDMIT), 18, route du Panorama 92265 Fontenay-aux-Roses, Le Kremlin-Bicêtre, France;Viral Evolution and Transmission Unit, IRCCS Ospedale San Raffaele, Milan, Italy;

关键词: Physiology;    Molecular biology;    Immunology;   

DOI  :  

来源: DOAJ

【 摘 要 】

Summary: The difficulty to unambiguously identify the various subsets of mononuclear phagocytes (MNPs) of the intestinal lamina propria has hindered our understanding of the initial events occurring after mucosal exposure to HIV-1.Here, we compared the composition and function of MNP subsets at steady-state and following ex vivo and in vivo viral exposure in human and macaque colorectal tissues.Combined evaluation of CD11c, CD64, CD103, and CX3CR1 expression allowed to differentiate lamina propria MNPs subsets common to both species. Among them, CD11c+ CX3CR1+ cells expressing CCR5 migrated inside the epithelium following ex vivo and in vivo exposure of colonic tissue to HIV-1 or SIV. In addition, the predominant population of CX3CR1high macrophages present at steady-state partially shifted to CX3CR1low macrophages as early as three days following in vivo SIV rectal challenge of macaques.Our analysis identifies CX3CR1+ MNPs as novel players in the early events of HIV-1 and SIV colorectal transmission.

【 授权许可】

Unknown