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This article is a letter to the editor discussing a rare case of Leydig cell tumor with type I diabetes mellitus causing female pattern hair loss, but it contains no abstract or new clinical findings.

This study found that cystatin M/E strongly inhibits human cathepsin V and cathepsin L via distinct non-overlapping sites, suggesting an important role in human epidermal differentiation and hair follicle morphogenesis.

This study identified a genetic variant in the CTS6 gene associated with a hypotrichosis syndrome, emphasizing the significant role of cystatin M/E in hair and skin health.

People with hair loss have more androgen receptors and enzymes in certain follicles, with men and women showing different patterns.

This article discusses the structure of the human type II 5 alpha-reductase gene and reports no new experimental results.

This study details the isolation and characterization of the human type II 5 alpha-reductase gene, which may play a role in male pseudohermaphroditism, prostate cancer, and benign prostatic hyperplasia.

This study discovered nine human type I hair keratin genes, including a transcribed pseudogene, in a 190 kbp genomic region, revealing three gene subclusters based on sequence homologies.

This study found that the prevalence of androgenetic alopecia in Chinese men was lower than in Caucasian men, similar to Korean men, and most commonly presented as type III vertex.

This study identified LY191704 as a specific noncompetitive inhibitor of human 5 alpha-reductase type 1, which may be useful in treating endocrine disorders related to DHT overproduction.

This study found that hyperandrogenemia in Chinese women with PCOS is associated with higher risks of type 2 diabetes and obesity, suggesting it should be prioritized in managing PCOS-related infertility.

This study found that overexpression of parathyroid hormone-related protein in mice resulted in 30–40% shorter hair due to premature transition into the catagen phase of the hair cycle.

This review discusses low-level light therapy for androgenetic alopecia and female pattern hair loss, noting minimal clinical evidence on its efficacy and the need for more controlled studies.

Clinical studies reported that finasteride reduces scalp dihydrotestosterone levels and improves hair growth in men with androgenetic alopecia, supporting its role as a treatment option.

This study found that serine 44 in the N-terminal head domain of keratin 17 is phosphorylated in response to various stimuli affecting skin keratinocyte growth, linking K17 up-regulation with growth and stress responses in skin epithelium.

This study found that exercise decreases the expression of 5αR1, thereby enhancing the PI3K/AKT signaling pathway in PCOS rats.

Men with baldness have higher levels of specific proteins, suggesting local hormone production may play a role in hair loss.

In this study, fraction No. 3 of Oryza sativa bran extract demonstrated high unsaturated fatty acid content and significant 5α-reductase inhibition, suggesting potential for developing anti-androgenic alopecia products.

In this study, osthenol was identified as a highly potent inhibitor of 5alpha-reductase type I in LNCaP cells, significantly outperforming finasteride.

This study found that GI198745 acts as a time-dependent inhibitor of rat 5α-reductase type 2 but a rapid-equilibrium inhibitor of type 1, potentially making it more effective than finasteride in preventing rat prostate growth.

This study found that adipose-derived mesenchymal stem cells from type 2 diabetes mice were slightly less effective, yet had comparable therapeutic effects on wound healing compared to non-diabetic controls.

This study found that IFN-γ plays a critical role in T cell activation and the pathogenesis of alopecia areata in C3H/HeJ mice.

This study found that the methanolic heartwood extract of Avicennia marina significantly inhibits 5α-reductase type 1, reducing 5α-DHT production by 52% in a cell-based assay with human hair dermal papilla cells.

This study found that mice lacking the type 3 IP(3) receptor in their hair follicles experienced repetitive hair loss and regrowth, indicating disrupted hair-cycle regulation potentially linked to specific signaling pathways.

This study found that patients with myotonic dystrophy types 1 and 2 often exhibit skin abnormalities, which correlate with genotype severity and serum vitamin D levels, and suggest premature aging.

This study found that insulin promotes corneal epithelial wound healing and nerve recovery in diabetic mice through Wnt signaling, suggesting its potential as a protective factor for diabetic corneal damage.

In this study of patients with androgenetic alopecia, botulinum toxin type A was found to significantly increase hair counts and improve hair density and coverage, with enhanced results observed when combined with oral finasteride, revealing a safe and effective treatment approach without adverse effects.

Created microspheres show potential for safe and effective use in prostate artery embolization.

This study found that transdermal DHT treatment increased penile length in boys with 5α-reductase type 2 deficiency, but post-pubertal growth was limited and carried potential prostate complications.

This study found that the pH dependency of rat steroid 5α-reductase type II isozyme significantly affects its kinetic properties, including Vmax and Km, suggesting past discrepancies in literature may arise from these pH variances during assays.

This study reports that women receiving periodic injections of botulinum toxin type A for forehead wrinkles may experience frontal alopecia, with progressive hairline recession observed in the cases studied.