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This study suggests that in gp91phox-knockout mice, tranexamic acid administration led to brown hair by increasing MGRN1 and collagen XVII levels, while the retention of black hair appears to rely on the gp91phox/ROS/IL-1β/TGF-β pathway.

This study by Pérez-Oliva et al. explored how Mahogunin Ring Finger-1 (MGRN1) affects melanocortin-1 receptor (MC1R) signaling, suggesting that MGRN1 competitively inhibits Gαs binding to MC1R, influencing pigment production.

In this study, the expression of Gnαs was significantly higher in black mice compared to white mice, suggesting its potential involvement in coat color formation in mice.

This review highlights the possibility of safely altering hair color through innovative cosmetics by targeting key biological processes in hair follicles, using insights from mammalian pigmentation studies and drug-induced hair color changes as potential pathways.