Olfactory receptor OR2AT4 regulates human hair growth

Nature Communications
Jérémy ChéretRalf Paus

Abstract

Olfactory receptors are expressed by different cell types throughout the body and regulate physiological cell functions beyond olfaction. In particular, the olfactory receptor OR2AT4 has been shown to stimulate keratinocyte proliferation in the skin. Here, we show that the epithelium of human hair follicles, particularly the outer root sheath, expresses OR2AT4, and that specific stimulation of OR2AT4 by a synthetic sandalwood odorant (Sandalore®) prolongs human hair growth ex vivo by decreasing apoptosis and increasing production of the anagen-prolonging growth factor IGF-1. In contrast, co-administration of the specific OR2AT4 antagonist Phenirat® and silencing of OR2AT4 inhibit hair growth. Together, our study identifies that human hair follicles can engage in olfactory receptor-dependent chemosensation and require OR2AT4-mediated signaling to sustain their growth, suggesting that olfactory receptors may serve as a target in hair loss therapy.

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Citations

Dec 7, 2018·Nature Reviews. Drug Discovery·Sung-Joon LeeHanns Hatt
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Methods Mentioned

BETA
acetylation
transfection
Assay

Software Mentioned

ImageJ
GraphPad Prism
qPCRsoft2
NIH ImageJ
GraphPad

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