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This review discusses the reuse of molecular mechanisms involved in embryonic skin development for maintaining adult epidermal homeostasis and reports no new results.

This study found that MED1 plays a role in maintaining keratinocyte quiescence and hair follicle stem cell populations, as its absence in mice led to increased keratinocyte proliferation and reduced stem cell numbers.

In this laboratory study, Camellia japonica fruit shell extract showed potential to mitigate hair loss by promoting hair cell growth and reducing harmful effects of DHT and oxidative stress.

This study found that the Foxn1(-/-) nude phenotype significantly influences epithelial progeny in skin, with notable changes in stem cell niches not achievable in other models.

This study observed that piperonylic acid activated key signaling pathways in dermal papilla cells and increased hair growth markers, and a clinical trial showed users of a piperonylic acid formulation had more hair than those using a placebo, suggesting its potential for treating hair loss.

This study found that Clitocybin A from Clitocybe aurantiaca mushrooms may promote hair growth by enhancing cell-cycle progression and activating signaling pathways in dermal papilla cells.

In this study on fine-wool sheep, researchers found that overexpressing the TGFBR1 gene decreased proliferation of dermal papilla cells by influencing multiple signaling pathways, suggesting TGFBR1 as a negative regulator in hair follicle development.

This study observed that the small molecules KY19382 and KY19334 inhibited cancerous traits in human cutaneous squamous cell carcinoma cells by suppressing the Wnt/β-catenin pathway, indicating their potential as treatments for cancers involving CDK1 overexpression and diseases related to CXXC5 accumulation.

In this study, human umbilical cord mesenchymal stem cell-derived exosomes were found to promote the growth of human hair dermal papilla cells, partly by enhancing AKT-dependent signaling pathways, suggesting a potential role in treating hair loss.

In this study, Stat3 activation in transgenic mice led to a decrease in stem cells in the hair follicle bulge, suggesting its crucial role in epidermal growth and stem cell maintenance.

Keratin patterns in hair follicles help understand hair growth and potential hair and nail disorders.

In this study, researchers used an evolutionary-rate-based method to identify genetic elements associated with reduced hair in mammals, finding a dichotomy between accelerated coding sequences and noncoding regulatory elements influencing hair growth.

This study found that coculturing human hair follicle keratinocyte stem cells with dermal papilla cells increased expression of the hair-specific keratin 6hf gene, which requires β-catenin/lef-1 signaling for hair differentiation.

In this study, RT1640 was found to promote hair pigment system regeneration and expand melanocyte stem cell pools in a mouse model, suggesting potential applications for aging-related hair disorders.

This study found that human growth hormone encapsulated in nano-liposome increased the number of hairs and stimulated hair cycling in mice, suggesting potential benefits for addressing hair loss.

This review highlights surprising similarities between hair follicles and antler units, suggesting that a comparative study of their biology could benefit understanding in both areas without presenting new empirical findings.

This study found that Wnt1a overexpression from bone marrow mesenchymal stem cells enhanced hair follicle regeneration in mice by promoting the dermal papilla's role in hair cycling and gene expression recovery.

In this study, Msx2-deficient mice showed progressive hair loss due to shortened anagen phase and prolonged catagen and telogen phases, resulting in cyclic alopecia with structurally abnormal hair shafts.

This study found that thyroid-stimulating hormone receptors are functionally expressed in various skin cells, implying potential physiological and pathological roles in skin, especially in conditions like autoimmune diseases.

This study found that DGAT1 functions as a key enzyme in murine skin to regulate retinoic acid levels and prevent retinoid toxicity, impacting hair cycle and sensitivity to retinol.

This review discusses various techniques for evaluating hair shedding and alopecia but reports no new clinical results. The authors emphasize the value of specific clinical and instrumental methods in assessing hair growth.

This study observed that in mouse hair follicles, enzymes Aldh1a2 and Aldh1a3 have distinct expression patterns that suggest they are involved in different signaling pathways during the hair cycle.

This review discusses the uncommon but potentially serious cutaneous reactions to beta-adrenergic blockers and the uncertain pathogenesis, with no new clinical results reported.

This study observed that oral mTOR inhibitors frequently cause dermatological side effects, such as mouth ulcers and acneiform eruptions, but these rarely require stopping the treatment.

This study found that contrast enhanced phototrichogram (CE-PTG) significantly improved detection of various hair types and growth stages in androgenetic alopecia compared to standard PTG and was comparable to biopsy analysis.

This study found that a genetic deletion causing truncated desmoglein 3 protein in mice led to severe pathologies, including cyclic hair loss and immunodeficiency, suggesting possible implications for human desmosome-related diseases.

This study suggests that the MAPK/ERK signaling pathway plays a role in the regulation of cell proliferation, apoptosis, and cycling in rat urethral plate fibroblasts affected by finasteride-induced hypospadias.

Integumentary organs adapt and evolve for survival, with potential uses in regenerative medicine.

This study suggests that diffuse alopecia areata initially involves an intense inflammatory attack during the anagen phase, progressing through different hair cycle stages with specific shedding patterns.

This study detected higher expression of p63 in occipital scalp areas compared to frontal areas, with minimal changes in beta-catenin expression and a novel finding of CD34 positive cells in hair follicles' outer root sheath.