Genetically predicted levels of circulating cytokines and the risk of six immune skin diseases: a two-sample Mendelian randomization study

This study used a two-sample Mendelian randomization approach to examine the causal relationships between 41 circulating cytokines and six immune skin diseases, including alopecia areata, in a cohort of 8,293 Finnish individuals. Significant associations were found, such as the causal effect of beta-nerve growth factor on hidradenitis suppurativa and interleukin-6 on lichen planus. The study also noted that lichen planus and urticaria could influence cytokine concentrations. These findings offer insights into the etiology of immune skin diseases and suggest potential diagnostic biomarkers and therapeutic targets, although further research is needed due to limitations like small sample sizes and genetic heterogeneity.