14 citations
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September 2017 in “General and comparative endocrinology” In this study, researchers observed that in barn owls, the relationship between black feather spot size and testosterone levels varied by age and sex, suggesting involvement of genes regulating both traits rather than direct influence of testosterone on feather coloration.
May 2008 in “Hair transplant forum international” This abstract provides no results, as it only notes Sharon Keene's professional role and describes a non-blood test for AGA genetics.
This study suggests that 5AR inhibitors may reverse decreased expression of growth factor genes in human hair follicles under testosterone stimulation, indicating involvement of type I 5AR in hair growth.
13 citations
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July 2018 in “General and comparative endocrinology” This study observed that direct exposure to androgens in Western clawed frogs differentially affects thyroid receptor and deiodinase gene expression in male and female tissues, offering insight into sex-specific metabolic pathway activation.
1 citations
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June 2021 in “Singapore Medical Journal” This study suggests that type I 5-alpha reductase may also play a role in hair growth, with dutasteride potentially being more potent than finasteride in modulating key hair growth gene expressions.