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This study presents a new classification of adult human scalp hair patterns based on high-resolution photographs, which may assist hair restoration surgeons and dermatologists in determining appropriate punch size for follicular unit extraction.

This article updates a prior work on pharmacophore modeling and highlights the advances in 3D database searching technologies for drug design, without presenting new research findings.

In this study by Sawada et al., the researchers developed a human striatal model using stem cells and postmortem samples, revealing accelerated neuronal maturation and specific gene expression changes linked to schizophrenia risk, which may inform future research on the disorder's developmental roots.

This study developed a mouse model to simulate chronic radiation-induced salivary dysfunction, revealing dose-dependent saliva reduction and glandular changes, which may help advance salivary regenerative therapies.

This review discusses the complex interaction between androgens and hair follicle biology, highlighting the need for a better understanding to improve hirsutism treatments, but reports no new results.

There is no significant link between insulin resistance and certain hair disorders like idiopathic hirsutism and androgenic alopecia.

This study found that hHbl gene expression is localized in the cortical cells of the human hair shaft and is notably high in pilomatricoma cells transitioning to hair shaft keratinocytes.

This study characterized a new human keratin, hK6irs1, specifically found in the inner root sheath of hair follicles, which suggests its role in the structural integrity and guidance of growing hair shafts.

In this study, low-intensity ultrasound was investigated as a noninvasive method for promoting hair regrowth in androgenetic alopecia using C57BL/6 male mice, revealing that specific frequencies and intensities can safely enhance hair regrowth compared to controls by optimizing mechanical effects without causing unsafe cavitation.

This study created a comprehensive single-cell atlas of hidradenitis suppurativa tunnels, identifying distinct microenvironmental endotypes linked to specific signaling pathways, suggesting that TNF blockade may not effectively address predominant pathways in many lesions and highlighting the potential for individualized treatment strategies.

In this study, researchers found that transgenic expression of the Hairless gene in keratinocytes can restore hair follicle regeneration in Hr-deficient mice by repressing Wise, a modulator of Wnt signaling.

This study found that overexpressing the Hoxc13 gene in mice causes hair loss and a skin condition similar to ichthyosis, identifying several gene targets that may regulate hair growth.

In this research, investigators used in vitro models to study the Merkel cell-neurite complex and reported that mechanical stimulation, similar to gentle touch, can induce molecular changes that are potentially relevant to hair growth, thus contributing to the understanding of its underlying mechanisms.

This study found that ultra-high molecular weight poly-γ-glutamic acid promoted hair growth in telogenic C57BL/6 mice by inhibiting 5-alpha reductase activity and inducing the anagen phase.

This study describes a new method using ImageJ to quantitatively assess hair loss in mice with alopecia areata, offering a more precise and reproducible alternative to traditional visual scoring systems by employing image-based analysis techniques.

This study presents evidence suggesting that androgenetic alopecia is most likely inherited through a polygenic model, challenging the traditional view that it is caused by a simple Mendelian autosomal dominant gene.

In this study, patients with polycystic ovary syndrome self-reported higher hirsutism scores compared to clinician assessments, but only clinician scores correlated with biochemical markers of hyperandrogenism.

This review highlights a disconnect between mechanistic insights and physiological relevance in preclinical models of hair loss disorders and suggests a shift toward more human-relevant systems could enhance translational research, despite limitations in existing models like transgenic mice and xenografts.

This article discusses the history and recent resurgence of Japanese hair replacement surgery but provides no new clinical findings.

This study found that K6a expression in mouse sebaceous gland ducts correlates with Hedgehog signaling, suggesting a role in duct fate.

This study found that FGF18 is crucial for regulating hair follicle rest and growth phases, as its absence in mice leads to a shorter resting phase and rapid hair cycling.

This study found that a topical hedgehog agonist can stimulate hair growth by promoting the transition from the resting to growth phase of the hair cycle in adult mouse skin.

This piece shares impressions from the 2005 meeting of the Japan Society of Clinical Hair Restoration and describes Japan as a beautiful and challenging country, without presenting new research findings.

This study describes a novel hairless mutant rat strain, F344-Hr(krh), developed via ENU mutagenesis, which provides a model for skin disease and potentially focal glomerulosclerosis due to specific genetic mutations.

The researchers found that HOXC13 regulates different keratin proteins in a mixed manner, with certain SNPs impeding this regulation, while also demonstrating negative-feedback by HOXC13 and positive regulation by LEF1 and melatonin on the HOXC13 promoter.

This study observed that deleting ARNT in keratinocytes of mice reduced zigzag hair production and altered hair follicle differentiation, likely by affecting the expression of specific cyclin-dependent kinase inhibitors.

This study found that only one upper portion of a bisected human hair follicle successfully regenerated a complete new follicle with a pigmented hair in nude mice, although the overall success rate was very low.

This study introduces the Hair Cell Analysis Toolbox (HCAT), a machine-learning software that automates the analysis of cochlear hair cells, enabling unbiased and comprehensive imaging data interpretation.

In this review, the authors provide an updated overview of hirsutism, highlighting new insights into androgen action, assessment methods, and treatment options, aiming for a personalized approach to manage this complex endocrine and psychological condition.

This study constructed a consensus single-cell atlas of hidradenitis suppurativa tunnels, identifying distinct microenvironmental endotypes with different inflammatory and fibrotic profiles, suggesting that TNF blockade may not be sufficient for addressing all lesions.