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This chapter reviews keratins in skin epithelia, including their roles in cellular function and disease, and reports no new experimental results.

This study found that while the reproducibility of hair cortisol measurements in captive chimpanzees was high, the fineness of homogenized hair, sample weight, and extraction time influenced absolute cortisol concentrations.

In this study, five patients with moderate hyperprolactinemia lacked symptoms, signs, or underlying causes, leading researchers to conclude that no further investigation or therapy was needed.

This study observed that a topical liposome formulation of a 5‐α‐reductase inhibitor effectively reduced the size of treated sebaceous glands and induced apoptosis in a hamster model, suggesting potential benefits for acne treatment.

Photocrosslinkable biomaterials can improve wound healing by controlling mechanical environments.

This study describes a novel method using force-triggered density gradient sedimentation for efficiently isolating dermal papilla cells from neonatal mouse skin, showing promise for hair follicle regeneration research.

This study reported that gain-of-function mutations in TRPV3 lead to hair loss in mice by disrupting inner root sheath keratinocyte differentiation, ultimately causing follicular keratinocyte stem cell exhaustion and permanent follicle disruption.

This study found that using age-specific AMH cut-off levels can help better identify PCOS patients across different age groups from 20 to 40 years.

In this study, a validated chromatographic method demonstrated the ability to simultaneously analyze gemcitabine and olaparib in pancreatic cancer tissues, supporting the advancement of pharmaceutical formulations combining these drugs, particularly for patients with BRCA mutations.

The article concludes that studying how skin forms is key to understanding skin diseases and improving regenerative medicine.

This study found multipotent progenitors in sweat ducts that become unipotent after sweat gland development, highlighting distinct regenerative capabilities in adult glandular skin stem cell populations.

This review discusses various nanoparticles and nanoemulsions being investigated for transdermal drug delivery and reports no clinical results; it highlights potential applications in treating alopecia, wound healing, psoriasis, and melanoma.

This review discusses current experimental approaches for regenerating human hair follicles using tissue engineering and isolated cells, but reports no successful strategies with adult cells yet found.

The researchers reported that the rat Hershberger assay reliably detected endocrine-disrupting effects of finasteride, procymidone, and 17α-methyltestosterone, validating the assay's sensitivity for identifying hormonal activity.

This study found that the human placenta extracellular matrix hydrogel restored the hair-inductive capacity of high-passaged dermal papilla cells, enabling them to regenerate new hair follicles when co-grafted with mouse epidermal cells.

This chapter reviews formulation principles for creating cosmetic nanoemulsions and applications targeting skin and hair care, but does not present new experimental results.

This review discusses the diagnostic challenges of PCOS in adolescents, noting that the persistence of hyperandrogenism and oligomenorrhea is required for diagnosis, while genetic studies suggest involvement of the hypothalamic-pituitary-ovarian axis.

In this study, the researchers successfully increased dipicolinic acid production in Bacillus subtilis by genetically modifying the spoVF operon, achieving a significant productivity improvement in the culture medium.

Both methods improve hair density and thickness; double-spin may be more effective.

This study demonstrated a validated UPLC method for analyzing finasteride in low-dose drug products, highlighting methanol content and flow rate as critical factors for method robustness and accuracy.

This study found a significant positive correlation between hair thickness and growth rate, with a notably slower growth rate observed in men with male pattern hair loss compared to healthy controls.

This study suggests that sebum samples can be effectively stored and transported with less stringent requirements than liquid samples, making them suitable for remote or at-home collection before clinical analysis.

This study optimized a screening assay to identify molecules that inhibit or enhance TRPM5 ion channel activity, which may have implications for treating dysfunctions linked to cardiac arrhythmias and diabetes.

This study found that high-dose pterostilbene potentially reduced prostate hyperplasia and had strong antioxidant effects in male rats with benign prostatic hyperplasia, suggesting it might be more effective than vitamin C and resveratrol in similar contexts.

This study found significant differences in the spread of sebum on hair among Chinese men with greasy and non-greasy scalps, despite similar sebum amounts at the root region post-shampoo.

This study examines various methodological factors affecting hair cortisol concentration analysis, finding inconsistent results on the impact of factors like resuspension solution, hair weight, extraction duration, and hair-cutting method.

This study found that a catechins-rich Assam tea extract demonstrated antioxidant effects and hair growth promotion in mice, suggesting its potential as a natural alternative for treating hair loss.

This study developed an herbal hair oil containing plant extracts such as Aloe barbadensis and Nigella sativa, reporting it showed good antioxidant and antimicrobial activity, suggesting potential benefits for hair growth and hair fall prevention.

In this study, researchers differentiated human induced pluripotent stem cells into dermal papilla-like cells and observed gene expression dynamics during five stages of dermal differentiation, demonstrating the potential of these cells to interact with epidermal cells in functional assays.

This study concluded that lenalidomide significantly induces the proliferation and migration of melanocyte stem cells, enhancing their differentiation into functional melanocytes in a mouse model.