中文亚洲成a人片在线观看_亚洲精品乱码久久久久久按摩_特级av毛片免费观看_欧美性猛交xxxx乱大交蜜桃

您現在的位置:首頁 > 資料文獻 > 尿道

PLOS Pathogens: Macrophages Subvert Adaptive Immunity to Urinary Tract Infection

作者:   發布于:2023年08月09日  點擊量:876
Title:

Macrophages Subvert Adaptive Immunity to Urinary Tract Infection

Journal:PlosPathogens
volume
Year:2015
Abstract

Urinary tract infection (UTI) is one of the most common bacterial infections with frequent recurrence being a major medical challenge. Development of effective therapies has been impeded by the lack of knowledge of events leading to adaptive immunity. Here, we establish conclusive evidence that an adaptive immune response is generated during UTI, yet this response does not establish sterilizing immunity. To investigate the underlying deficiency, we delineated the na?ve bladder immune cell compartment, identifying resident macrophages as the most populous immune cell. To evaluate their impact on the establishment of adaptive immune responses following infection, we measured bacterial clearance in mice depleted of either circulating monocytes, which give rise to macrophages, or bladder resident macrophages. Surprisingly, mice depleted of resident macrophages, prior to primary infection, exhibited a nearly 2-log reduction in bacterial burden following secondary challenge compared to untreated animals. This increased bacterial clearance, in the context of a challenge infection, was dependent on lymphocytes. Macrophages were the predominant antigen presenting cell to acquire bacteria post-infection and in their absence, bacterial uptake by dendritic cells was increased almost 2-fold. These data suggest that bacterial uptake by tissue macrophages impedes development of adaptive immune responses during UTI, revealing a novel target for enhancing host responses to bacterial infection of the bladder.

Cite/Figure



31


Links

(如需全文,請聯系我們)