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This article reviews the impact of H2O2-redox homeostasis on hair follicle pigmentation via tyrosinase and associated mechanisms, discussing primarily findings from murine models without providing new clinical results for humans.

The digital system for measuring melasma shows promise but needs more development for better accuracy and automation.

This review discusses the migration and colonization of melanocytes from the neural crest in mammals and reports no new experimental results.

In this study, the brown skin of guinea pigs exhibited higher levels of certain biochemical markers related to melanogenesis compared to black and white skin, with distinct differences in ascorbic acid utilization and protein concentrations observed between regions.

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.

This study found that Sox2 and BMP signaling may be key regulators of pigmentation and melanocyte migration, as suggested by experiments in mice, human biopsies, and cell co-cultures.

This study found that in Rex rabbits, exosomal miR-222-3p from dermal papilla cells suppresses melanogenesis in melanocytes by targeting the SOX10 gene, highlighting a novel mechanism by which exosomes influence melanin production.

PRDX5 enzyme may contribute to alopecia areata by affecting oxidative stress and autoimmunity.

This study found that differentially expressed genes in horses with white versus black coats may regulate coat color, providing insights into the genetics of skin melanin synthesis.

This study explores the complex and not yet fully understood causes of premature hair greying, noting genetic factors such as Pax3 and MITE genes, potential defects in melanin transfer, and associations with certain syndromes, while stating that effective treatments are currently lacking.

This study reports that PDRN, commonly used for wound healing, may also have anti-melanogenesis and potential skin whitening effects in both experimental models and clinical settings.

This study suggests that the patchy thickening and reddish discoloration in rabbit skin during the hair cycle may be due to large anagen-phase hair follicles compressing the dermis and increased blood vessels causing redness.

This study observed that melanogenesis in human hair follicles is linked to anagen phases, with melanocyte activity and enzyme expression being region-specific to the nascent bulb.

In this case study, researchers documented a Chinese boy with hair color changing to red and identified MC1R genetic mutations as the cause, rather than zinc deficiency, enhancing our understanding of hair heterochromia due to genetic factors.

This article reports on lentiginosis observed within plaques of linear atrophoderma of Moulin and discusses its potential classification as a twin-spotting phenomenon but provides no new clinical research results.

An 8-year-old girl with vitiligo developed extra hair growth on her knee after using tacrolimus ointment.

This study developed a silk fibroin/poly(vinyl alcohol) microneedle loaded with α-aminoxyacetate and HfO₂ nanoparticles for vitiligo treatment, which protected against ROS damage and modulated immune responses, leading to improved melanogenesis and skin repigmentation.

This study adapted a method for culturing melanocytes from human hair follicles to horses, successfully creating partially melanotic equine melanocytes, potentially advancing hair follicle biology research across species.

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 case report details a 37-year-old woman with pityriasis rubra pilaris, highlighting scarring alopecia and widespread hyperkeratotic lesions despite various treatments.

This review discusses medication-induced gray hair repigmentation, highlighting that certain anti-inflammatory drugs and melanogenesis stimulators can cause diffuse repigmentation, though evidence remains low-quality and these medications are not currently indicated for this purpose.

This case study describes a Doberman Pinscher with a unique alopecic variant of chronic cutaneous lupus erythematosus that progressed to systemic lupus erythematosus, highlighting a rare autoimmune alopecia form in dogs.

This case study of a 50-year-old woman with myotonic dystrophy and multiple basal cell carcinomas suggests there could be a genetic predisposition for certain cutaneous tumors in such patients.

This report describes a rare case where a 76-year-old man's grey scalp hair unexpectedly regained its original orange to brown color after he underwent radiotherapy for squamous cell carcinoma, suggesting possible implications involving hair follicle melanocytes and radiation effects.

This review discusses the potential use of platelet-rich plasma for treating melasma, suggesting its effectiveness but noting the need for more extensive studies to confirm these findings.

This study found that physoxia improved hair follicle functions in co-cultures of dermal papilla cells and melanocytes by enhancing their biological activities and promoting hair growth and pigmentation.

This case report describes a young patient with a unique combination of dysmorphism, bullous eruption, skin and muscle atrophy, and hyperpigmentation that doesn't fit existing nosological categories.

This study found that G protein-coupled estrogen receptor enhances melanin synthesis in melanoma cells through cAMP-PKA-MITF-TYR signaling, suggesting its potential as a drug target for chloasma treatment.

This study found that patients with myotonic dystrophy type 1 developed basal cell carcinomas at a younger age than the general population, suggesting a possible predisposition in this group.

This study found that among men over 70, certain genetic variants associated with skin pigmentation affect serum PSA levels, with implications for how sun sensitivity and exposure may influence prostate cancer risk.