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Inflammatory Response Against Intracellular Sensing of Nucleic Acids in Keratinocytes. | LitMetric

AI Article Synopsis

Article Abstract

is one of the clinically most relevant pathogens causing infections. Humans are often exposed to . In approximately one-third of the healthy population it can be found on the skin either for long or short periods as colonizing "commensals", without inducing infections or an inflammatory immune response. While tolerating seems to be limited to certain individuals and time periods in most cases, is tolerated permanently on the skin of almost all individuals without activating overwhelming skin inflammation. To investigate this, we co-cultured a keratinocyte cell line (HaCaT) with viable or to study the differences in the immune activation activated keratinocytes depicted by a profound IL-6 and IL-8 response, whereas did not. Our data indicate that internalization of and the subsequent intracellular sensing of bacterial nucleic acid may be essential for initiating inflammatory response in keratinocytes. Internalized dsRNA activates IL-6 and IL-8 release, but not TNF-α or IFNs by human keratinocytes. This is a non-specific effect of dsRNA, which can be induced using Poly(I:C), as well as RNA from and . However, only viable were able to induce this response as these bacteria and not were actively internalized by HaCaT. The stimulatory effect of seems to be independent of the TLR3, -7 and -8 pathways.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8907419PMC
http://dx.doi.org/10.3389/fimmu.2022.828626DOI Listing

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