Systemic and mucosal mobilization of granulocyte subsets during lentivirus infection

crossref(2021)

引用 0|浏览2
暂无评分
摘要
AbstractGranulocytes mediate broad immunoprotection through phagocytosis, extracellular traps, release of cytotoxic granules, antibody effector functions and recruitment of other immune cells against pathogens. However, descriptions of granulocytes in HIV infection and mucosal tissues are limited. Our goal was to characterize granulocyte subsets in systemic, mucosal and lymphoid tissues during lentivirus infection using the rhesus macaque (RM) model. Mononuclear cells from jejunum, colon, cervix, vagina, lymph nodes, spleen, liver, and whole blood from naïve, and chronically SHIVsf162p3-infected RM were analyzed by microscopy and polychromatic flow cytometry. Granulocytes were identified using phenotypes designed specifically for RM: eosinophils – CD45+CD66+CD49d+; neutrophils – CD45+CD66+CD14+; and basophils – CD45+CD123+FcRε+. Nuclear visualization with DAPI staining and surface marker images by ImageStream (cytometry/microscopy) further confirmed granulocytic phenotypes. Flow cytometric data showed that all RM granulocytes expressed CD32 (FcRγII) but did not express CD16 (FcRγIII). Additionally, constitutive expression of CD64 (FcRγI) on neutrophils and FcRε on basophils, indicates the differential expression of Fc receptors on granulocyte subsets. Granulocytic subsets in naïve whole blood ranged 25.4-81.5% neutrophils, 0.59-13.3% eosinophils and 0.059-1.8% basophils. Interestingly, elevated frequencies of circulating neutrophils, colorectal neutrophils, and colorectal eosinophils were all observed in chronic lentivirus disease. Conversely, circulating basophils, jejunal eosinophils, vaginal neutrophils, and vaginal eosinophils of SHIVsf162p3-infected RM declined in frequency. Overall, our data suggest modulation of granulocytes in chronic lentivirus infection, most notably in the gastrointestinal mucosae where significant inflammation and disruption occurs in lentivirus-induced disease. Furthermore, granulocytes may migrate to inflamed tissues during infection and could serve as targets of immunotherapeutic intervention.
更多
查看译文
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要