Hunting the Genes in Male-Pattern Alopecia: How Important Are They, How Close Are We and What Will They Tell Us?

The 2016 document reviewed the genetic research on androgenetic alopecia (AGA), indicating it is highly heritable with twin studies showing heritability estimates of 0.81 and 0.79 for early-onset and elderly males, respectively. Twelve genomic regions have been implicated in AGA, with the strongest association found on the X-chromosome region flanked by AR and EDA2R. The review underscores the importance of genetic research for understanding AGA's pathobiology and identifying new therapeutic targets, as well as its potential to reveal correlations with other illnesses. It acknowledges that while common variants with low-to-moderate effect sizes are involved, the role of rare variants with higher effect sizes is not excluded. The document calls for further studies to clarify the genetic variations' connection to AGA development and suggests that genetic findings could lead to new drug targets and provide insights into shared disease mechanisms with other conditions. However, it cautions that drug development from gene targets to market is a lengthy process, often exceeding a decade.