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首页> 外文期刊>Experimental dermatology >TLR-2-mediated cytokine and chemokine secretion in human keratinocytes.
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TLR-2-mediated cytokine and chemokine secretion in human keratinocytes.

机译:人角质形成细胞中TLR-2介导的细胞因子和趋化因子分泌。

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摘要

The human epidermis provides a first line of defense against exogenous pathogens. Resistance to bacterial skin infections, e.g. with Staphylococcus aureus (S. aureus), is based on the function of intact innate immune mechanisms in the epidermis, mainly provided by keratinocytes. They establish the local cytokine and chemokine milieu which is necessary for attracting other cells participating in an immune response. Toll-like receptor (TLR)-2 recognizes components of S. aureus and is known to be expressed on keratinocytes. The aim of this study was to investigate TLR-2-mediated chemokine and cytokine secretion on human primary keratinocytes (HPKs) both on mRNA and on protein level. As there is no selective TLR-2 ligand known so far, we chose Pam3Cys that acts via TLR-2/TLR-1 heterodimers, lipoteichoic acid (LTA) that acts via TLR-2/TLR-6 and peptidoglycan (PGN) which acts via TLR-2 and Nod. Pam3Cys stimulation yielded in an enhanced secretion of CCL20, CCL2, MMP9 and IL-8 in HPK, whereas stimulation with PGN or LTA showed no or solely slight effects. Our findings show evidence for a functional TLR-2/TLR-1 signalling profile in HPKs upon stimulation with Pam3Cys contributing to the defense against bacterial skin infections.
机译:人的表皮为抵抗外源性病原体提供了第一道防线。对细菌性皮肤感染的抵抗力金黄色葡萄球菌(S. aureus)的作用是基于表皮完整的先天免疫机制的功能,主要由角质形成细胞提供。他们建立了局部细胞因子和趋化因子环境,这是吸引其他参与免疫反应的细胞所必需的。 Toll样受体(TLR)-2识别金黄色葡萄球菌的成分,并已知在角质形成细胞上表达。这项研究的目的是研究TLR-2介导的人原代角质形成细胞(HPK)的趋化因子和细胞因子的mRNA和蛋白水平。由于目前尚无选择性的TLR-2配体,我们选择了通过TLR-2 / TLR-1异二聚体起作用的Pam3Cys,通过TLR-2 / TLR-6起作用的脂蛋白酸(LTA)和起作用的肽聚糖(PGN)通过TLR-2和Nod。 Pam3Cys刺激可增强HPK中CCL20,CCL2,MMP9和IL-8的分泌,而PGN或LTA刺激则无作用或仅有轻微作用。我们的发现表明,在受到Pam3Cys刺激后,HPKs中有功能性TLR-2 / TLR-1信号传导特征,有助于防御细菌性皮肤感染。

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