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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.

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.

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.

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.

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.

This article discusses the roles of different proteins in melanogenesis and proposes a hypothesis to explain the diversity of human hair pigmentation, but it reports no new experimental results.

This study identified ALDH1A1 as a regulator of melanogenesis and suggests its inhibition, through agents like cyanamide, may be a promising therapeutic approach for treating hyperpigmentation disorders such as melasma.

In this study, α-MSH and cyclic AMP were found to stimulate melanogenesis in hair follicle cultures, while cyclic GMP and melatonin inhibited melanin production but not tyrosinase activity.

This article discusses melanocyte development from neural crest cells and reports no new experimental results; the authors suggest a broader range of functions for melanocytes than previously recognized.

This study identified 92 novel regulators of melanogenesis, highlighting Aldehyde dehydrogenase 1A1 as a potential target for developing new treatments for hyperpigmentation disorders like melasma.

Melatonin stops melanin production after tyrosinase action, with cyclic GMP mimicking this effect.

This study found that α-melanocyte-stimulating hormone increased melanin production in hair follicles of moulting Siberian hamsters, whereas [8-arginine]-vasotocin inhibited melanin production without affecting tyrosinase activity.

This study found that human skin melanocytes with low mutation burdens are smaller, less dendritic, and exhibit stem-like features, often residing in UV-protected hair follicles, suggesting their role in replenishing sun-damaged epidermis.

This study observed unexpected heterogeneity among pigment cells in human scalp hair follicles, identifying immature melanocyte populations outside traditional pigment production zones, raising questions about their potential roles beyond melanin synthesis.

This review explores the multifaceted roles of melanocytes in skin biology, emphasizing their potential impact on future research to prevent and treat skin diseases, but reports no new experimental results.

This study used atomic force microscopy to image surface structures of human epidermal melanocytes, hair follicle amelanotic melanocytes, and mouse melanoma cells, revealing differences in branch structure and granule distribution.

In this study, researchers explored the heterogeneity of pigment cells in the human scalp anagen hair follicle bulb and discovered unexpected subpopulations of melanocytes, including immature SOX10-negative cells, highlighting potential non-melanogenic roles or transitional migratory functions that require further investigation.

This review discusses the role of intrinsic skin signals, rather than serum signals, in regulating melanin synthesis and hair pigmentation, but reports no new experimental data.

This review discusses the role of melanocytes in skin pigmentation and UV protection, explaining their interactions with keratinocytes and highlighting their involvement in processes like melanin transfer and melanoma development, but reports no new results.

This study found that non-cutaneous melanocytes in mice are less sensitive to Kit signaling compared to cutaneous melanocytes, showing dependence on ET3 and HGF signaling.

This review discusses how the CRH/POMC systems may regulate human hair follicle pigmentation and highlights the concept of "self-similarity" in melanocortin systems at both local and systemic levels, without presenting new experimental results.

Treatments for melanin disorders exist, but more effective options needed.

This study found that epidermal melanocytes can regenerate hair follicles, whereas non-cutaneous or dermal melanocytes cannot, suggesting two distinct melanocyte lineages with potential implications for melanocyte-related diseases.

This article explains the role of melanins in hair color, focusing on their production by melanocytes, but presents no new research findings.

Fibroblasts can be turned into melanocytes for potential skin treatments.