Emerging epidemiological evidence links atopic dermatitis (AD) and periodontitis, although the mechanisms remain unclear. Th2-derived cytokines are key in the development of both diseases, and different gingival crevicular fluid (GCF) profiles among healthy and diseased subjects have been previously reported. This case-control study examined the GCF levels of interleukins (IL)-13, IL-31, and thymic stromal lymphopoietin (TSLP) in 29 subjects with moderate-to-severe AD and 33 controls. All subjects underwent comprehensive clinical and oral evaluations, followed by GCF collection. GCF levels of IL-13, IL-31, and TSLP were assessed using a multiplex-bead immunoassay. Demographic and periodontal parameters were similar among groups ( > 0.05). The GCF levels of IL-31 and TSLP were higher in AD subjects compared to controls ( < 0.05), whereas no significant differences in the GCF levels of IL-13 were noticed ( = 0.377). Moderate-to-severe AD was positively associated with the GCF levels of IL-31 and TSLP, whereas severe periodontitis was negatively associated with IL-31 ( < 0.05). The GCF levels of IL-13 showed no significant associations with either condition ( = 0.689). There was no significant interaction between AD and periodontitis for IL-31 ( < 0.869). These results suggest that AD and periodontitis independently influence the GCF levels of IL-31 in opposing ways, whereas AD alone influences the levels of TSLP.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10650793PMC
http://dx.doi.org/10.3390/ijms242115592DOI Listing

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