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In this study, researchers used single-cell RNA sequencing to define and locate three distinct cell states of melanocytes in mouse skin development, potentially aiding the understanding of abnormal melanocyte differentiation.

This study found that HPV8-induced actinic keratoses may mechanistically involve Lrig1+ hair follicle keratinocyte stem cells, with the E6 gene promoting downstream STAT3 activity in a mouse model.

This study found that matrix progenitor cells in hair follicles move in a conveyor-belt-like fashion along the dermal papilla, changing their transcriptional states and lineage potential as they differentiate into inner hair follicle layers.

This study found that adipose stem cell exosome treatment may improve hair growth and scalp rejuvenation, outperforming minoxidil and showing promise in clinical trials for hair loss, including androgenic alopecia.

This study found that marine-derived collagen peptides slightly promoted hair matrix proliferation and prolonged hair growth phase in human hair follicles ex vivo, suggesting potential benefits for hair loss treatment.

This study found that CD1a-restricted CD4+ T cells responsive to lysyl-phosphatidylglycerol were more frequent in the blood of atopic dermatitis patients, suggesting a potential role in the disease's Th2-mediated pathology.

This study in live mice suggests that hair follicle regression involves apoptosis propagation towards stem cells, potentially slowed by a protective signal from the stem cells themselves.

This study developed a 3D skin model with immune and endothelial cells, which may enhance understanding of skin biology and diseases due to its closer approximation to native skin.

This study found that frontal fibrosing alopecia involves distinct molecular changes, such as downregulation of steroid and cholesterol pathways and upregulation of fibrotic and immune response genes, which may help guide treatment strategies.

In this study, researchers found that CCCA in women of African descent is associated with molecular changes, including dysregulation of fatty acid metabolism and fibrosis pathways, suggesting potential targets for new treatments.

This study found that lichen planopilaris is associated with three core molecular pathways, which may inform new therapeutic strategies for scarring alopecia, including unique pathways like ABC transporters specific to LPP.

Hair graying is caused by the loss of pigment cells due to poor maintenance of stem cells in the hair follicle.

This study reported that adipose stem cell exosomes, combined with microneedling, improved facial skin wrinkles, elasticity, hydration, and pigmentation compared to a placebo, with significant results on the Global Aesthetic Improvement Scale and no serious adverse events noted in treated individuals.

In this study, human dermal fibroblasts were identified as natural host cells that support productive Merkel cell polyomavirus infection, and the MEK antagonist trametinib was introduced as an effective inhibitor to control the virus.

This study found that mice with a specific loss of DNA methyltransferase 1 showed uneven epidermal thickness, reduced hair regeneration, and progressive alopecia, emphasizing DNA methylation's role in stem cell homeostasis.

This study found distinct gene expression profiles in alopecia areata-affected skin, suggesting T-cell mediated immune responses and unique gene profiles between different stages of the disease.

In this study, researchers created a detailed human skin cell atlas by analyzing over 700,000 cells, finding that disrupted communication among specific immune and stromal cell subsets may play a key role in initiating and sustaining chronic skin inflammation in atopic dermatitis.

This review discusses recent advances in hair follicle biology, regeneration, and tissue engineering, highlighting emerging therapeutic opportunities, and reports no new experimental results.

This study found that TGFβ signaling is essential for keeping sebocytes undifferentiated by reducing lipid-related gene expression, using a novel human sebocyte culture model.

This study found that Thy1+ keratinocytes in the basal layer of the interfollicular epidermis play a crucial role in epidermal homeostasis and wound repair, with their ablation impairing these processes.

This study suggests that Lrig1-positive cells form a previously unknown reservoir of interfollicular epidermal stem cells in adult mouse skin, influencing epidermal proliferation and hair follicle development.

This study found that super-enhancers are essential for hair follicle stem cell identity, lineage commitment, and plasticity in mice, with SOX9 being a key regulator of these chromatin dynamics.

COL17A1 is crucial for preventing hair graying and loss by supporting hair and pigment stem cells.

This study found that patterned hair plucking in mice triggers a collective regeneration response in nearby unplucked hair follicles via a quorum sensing mechanism involving immune signaling.

This study reveals an antagonistic competition between BMP and Wnt signaling within stem cells, influencing their fate towards hair germ characteristics based on the BMP/Wnt activity ratio.

This review discusses the use of the zebrafish lateral line system as a model to study hair cell loss, protection, and regeneration, with potential implications for human hearing research.

The researchers reported that mast cell and nerve fiber interactions in mouse skin are highly selective for nerve fiber types and vary depending on the hair cycle phase.

This review discusses how macro-environmental factors such as intradermal adipose tissue and sex hormones influence hair and feather stem cell niches, suggesting environmental targets for regenerative medicine, but reports no new clinical results.

This study found that intra-follicular Wnt signaling and dermal BMP signaling oscillate differently during hair cycling in mice, affecting hair wave propagation and phases of hair growth.

In this study using zebrafish, four bisbenzylisoquinoline derivatives were found to protect hair cells from aminoglycoside-induced damage without reducing antibiotic efficacy, potentially leading to therapies for patients undergoing such treatments.