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This review examines the role of stem cells and their niches in continuously growing ectodermal organs like teeth, hair, and claws, providing insights from mouse models without presenting new research findings.

This report examines the mechanisms by which TCDD affects human epidermal and carcinoma cells, aiming to create a risk assessment model for halogenated aromatic compounds, but presents no new clinical results.

This study found that ablation of Tet2/Tet3 genes in skin epithelial cells altered hair shape and length, leading to hair loss, by affecting chromatin accessibility and gene expression related to hair follicle regulation.

LSD1 is crucial for regenerating hair cells in zebrafish.

This review discusses the structure and assembly of the cornified cell envelope in stratified squamous epithelial cells and various disorders leading to barrier defects, but reports no new findings.

This study describes a method to estimate endogenous hormone production by neutralizing an endogenous hormone with an oppositely acting hormone.

This study found that cepharanthine and its structural analogues may stimulate hair growth by promoting the proliferation of human dermal papilla cells and increasing VEGF expression in vitro.

This study reports no new clinical results on oral zinc therapy for acrodermatitis enteropathica but provides demographic data and symptom prevalence among thirty affected children.

This study concluded that epidermal growth factor may induce a 'catagen-like' phase in human hair follicles by disrupting normal cellular proliferation and migration patterns.

This chapter discusses stem cell activity in feather and hair follicles, emphasizing how stem cells maintain their population by cycling between quiescence and activation in specialized niches but reports no new results.

This study used electron microscopy to identify a distinct dendritic cell in the human epidermis, similar to the melanocyte, with unique structural features and variable melanin content.

This study concluded that cyproterone acetate alone produced antiandrogenic effects on the female gerbil prostate, while ethinyloestradiol alone stimulated estrogenic activity, and their combination led to prostatic lesions.

In this study, researchers developed an in vitro airway-organoid model using human lung-derived cell lines on RADA16-I hydrogels to serve as a potential tool for studying adenovirus isolation, pathogenesis, and antiviral drug screening.

This study found that the diphosphonate ethan-1-hydroxy-1,1-diphosphonat was the most effective compound in preventing calcifications in rats induced by DHT, compared to other phosphatase inhibitors and polyphosphates tested.

5α-Reductase helps regulate hormone action in toad testes, especially during breeding season.

This study found that finasteride's solubility and bioavailability were improved when using a dimethyl-β-cyclodextrin inclusion complex compared to the drug alone.

This review discusses the use of zebrafish larvae as an alternative model for studying ototoxicity, facilitating large-scale screening for otoprotective compounds, but reports no new clinical results.

This review examines the physiological, biochemical, and molecular mechanisms by which DHEA and DHEA-S influence various bodily systems, citing rodent studies, but presents no new clinical results.

This study found that the extraction-resistant structures in hair, feathers, and hagfish teeth are due to ε-(γ-glutamyl)lysine cross-linked proteins, emphasizing their role in maintaining the integrity of these materials.

In this study, researchers found that the loss of SETDB1 in epidermal keratinocytes led to altered chromatin states, increased ERV expression, and activation of immune responses, while inhibiting these effects with certain antiviral drugs reduced skin inflammation and hair loss in a mouse model.

This study identifies the PI4P-RHD4 module as a key regulator of GET pathway receptor dynamics in Arabidopsis, affecting TA protein insertion and root hair growth.

This study found that polyamidoamine dendrimers can permeate skin's current conducting pores and alter the magnitude and direction of electroosmotic flow, affecting drug flux during iontophoresis.

This study found that higher dihydrotestosterone (DHT) levels in the parietal region of the scalp may be linked to androgenetic alopecia's clinical presentation.

This study suggests that the structure and function of the inner root sheath in mammalian hair may have evolved from simpler forms seen in monotremes, aiding in hair exit without damaging the epidermis.

In this case report, a 2-year-old cat with bilateral otitis externa and scabiosis was treated with a combination of antiparasitic, antibiotic, antifungal, and anti-inflammatory medications, leading to significant clinical improvement after 10 days.

This study found that extracts from the medicinal plants *Echinops echinatus* and *Tridax procumbens* displayed antimicrobial activity against several bacteria, including *Escherichia coli* and *Staphylococcus aureus*, and identified various compounds like flavonoids and terpenoids potentially responsible for these effects.

This study found that the HoxC gene cluster plays a critical role in the development of ectodermal organs, including hair and nails, with mammalian-specific enhancers increasing transcription levels during development.

This study evaluated a hydrogel containing extracts from azadirachta indica and tridax procumbens for treating seborrheic dermatitis, finding it passed various tests, including skin irritation and stability, suggesting potential future applications in herbal formulations.