This study observed that the development of the pars intermedia in long-tailed macaques is closely associated with changes in skin pigmentation during pre- and postnatal periods through melanocyte-stimulating hormone and ACTH activity.
56 citations
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November 2010 in “Pigment Cell & Melanoma Research” This article discusses the role of neurohormones and neuropeptides in hair follicle pigmentation and outlines promising neuroendocrinological strategies to address greying and damage, but reports no new clinical results.
12 citations
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May 2023 in “EMBO reports” In this study with organ-cultured human scalp hair follicles, high mTORC1 activity correlated with gray/white hair and reduced pigmentation, while inhibiting mTORC1 with rapamycin increased hair growth and pigmentation, suggesting mTORC1 inhibition could be a strategy for treating hair depigmentation and loss.
May 2004 in “International Journal of Cosmetic Science” This study found that kojic acid and niacinamide were the most effective inhibitors of UVB-induced NF-κB activation and IL-6 secretion in HaCaT keratinocytes, suggesting a role in modulating melanotrophic factor synthesis.
November 2022 in “Journal of Investigative Dermatology” In this study, rapamycin was found to increase hair follicle pigmentation and prolong anagen duration in cultured human scalp hair follicles, suggesting it could be explored as an anti-greying agent.