微生物与皮肤先天免疫相互作用的新机制。

Novel mechanisms of microbial crosstalk with skin innate immunity.

作者信息

Chinnappan Mahendran, Harris-Tryon Tamia A

机构信息

Department of Dermatology, University of Texas Southwestern Medical Center, Dallas, TX, USA.

Department of Immunology, University of Texas Southwestern Medical Center, Dallas, TX, USA.

出版信息

Exp Dermatol. 2021 Oct;30(10):1484-1495. doi: 10.1111/exd.14429. Epub 2021 Jul 21.

Abstract

Skin is an organ with a dynamic ecosystem that harbours pathogenic and commensal microbes, which constantly communicate amongst each other and with the host immune system. Evolutionarily, skin and its microbiota have evolved to remain in homeostasis. However, frequently this homeostatic relationship is disturbed by a variety of factors such as environmental stress, diet, genetic mutations, and the microbiome itself. Commensal microbes also play a major role in the maintenance of microbial homeostasis. In addition to their ability to limit pathogens, many skin commensals such as Staphylococcus epidermidis and Cutibacterium acnes have recently been implicated in disease pathogenesis either by directly modulating the host immune components or by supporting the expansion of other pathogenic microbes. Likewise, opportunistic skin pathogens such as Staphylococcus aureus and Staphylococcus lugdunensis are able to breach the skin and cause disease. Though much has been established about the microbiota's function in skin immunity, we are in a time where newer mechanistic insights rapidly redefine our understanding of the host/microbial interface in the skin. In this review, we provide a concise summary of recent advances in our understanding of the interplay between host defense strategies and the skin microbiota.

摘要

皮肤是一个拥有动态生态系统的器官,其中栖息着致病性和共生微生物,它们之间以及与宿主免疫系统不断相互交流。从进化角度来看,皮肤及其微生物群已进化至保持稳态。然而,这种稳态关系常常会受到多种因素的干扰,如环境压力、饮食、基因突变以及微生物群自身。共生微生物在维持微生物稳态方面也发挥着重要作用。除了具有限制病原体的能力外,许多皮肤共生菌,如表皮葡萄球菌和痤疮丙酸杆菌,最近被认为通过直接调节宿主免疫成分或支持其他致病微生物的扩增而参与疾病发病机制。同样,机会性皮肤病原体,如金黄色葡萄球菌和路邓葡萄球菌,能够突破皮肤并引发疾病。尽管关于微生物群在皮肤免疫中的功能已取得了很多研究成果,但我们正处于一个新的机制性见解迅速重新定义我们对皮肤中宿主/微生物界面理解的时代。在这篇综述中,我们简要总结了我们对宿主防御策略与皮肤微生物群之间相互作用理解的最新进展。

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