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This review discusses the use of hairs and feathers as defensive tools through toxin incorporation in certain mammals and birds and reports no new experimental findings.

This study investigated peptidergic nerve fibers in sinus hair follicles of various mammals and found that CGRP fibers were more densely distributed than SP fibers across different regions of the follicles.

The document concludes that sex hormones are crucial for mammalian reproduction, health, and behavior, and require more research for therapeutic use.

This study observed that distinct subsets of Hoxd genes in murine vibrissae and chicken feather primordia are regulated by different lineage-specific enhancers, indicating evolutionary changes in chromatin topology contribute to transcriptional robustness.

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 examining the microscopic and ultramicroscopic structures of donkey and horse hair can help differentiate between the species based on distinct differences in hair cuticle and brain substance patterns.

This study developed the mTurquoise2-Col4a1 mouse model and used fluorescent tagging of collagen IV to offer new insights into basement membrane dynamics during hair follicle budding, revealing that basement membranes are flexible and stable structures in developing skin tissue.

This study identified genetic regions evolving at different rates in hairless mammals, suggesting that specific genomic changes may contribute to the evolution of hairlessness across various species.

This study found that most potassium channel blockers increased the activity of slowly adapting mechanoreceptors in rat whisker pads, while the opener NS1619 decreased their evoked activity.

This study found that actomyosin contractility in suprabasal keratinocytes influences the proliferation and differentiation of epidermal stem/progenitor cells by acting as a niche element in the skin.

This study found that the HoxC gene cluster is crucial for the development of hair and nails in mice, with key regulation by two mammalian-specific enhancers.

This review discusses the cytotoxic effects of various selenium compounds on human mammary tumor cells and explores the impact of selenium and magnesium in dietary studies with nude mice, reporting no new clinical results.

Pax9 is crucial for proper tongue surface development and preventing skin-like changes.

EGFR signaling is essential for ear cell regeneration in both birds and mammals.

This review discusses the role and plasticity of epidermal stem cells in skin maintenance, wound repair, and cancer, noting recent insights from advanced technologies but providing no new clinical results.

This study reports that caspase-14's expression pattern in the epidermis and hair follicles is highly conserved across diverse mammalian species, suggesting its early evolutionary role in mammalian skin maturation.

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.

Keratin gene clusters in humans and marsupials are similarly organized.

This study confirms that the proposed universal model for hard α-keratin structure applies to all known forms across various mammalian species.

Melatonin stops melanin production after tyrosinase action, with cyclic GMP mimicking this effect.

Candida auris uses the immune response to colonize hair follicles.

This study reports that KRTAP-like proteins, which resemble keratin-associated proteins found in mammals, are also present in the cornified teeth of various lamprey species, suggesting these proteins may serve similar functions in skin appendages across different vertebrates despite independent evolutionary origins.

This review examined and discussed the role of dermis-derived factors in the regulation of melanogenesis, noting their significance in both normal and abnormal mammalian skin conditions, suggesting an underexplored area of study compared to dermal and epidermal influences.

This study suggests that epidermal turnover could be a regulated mechanism of iron excretion, with systemic iron levels influencing keratinocyte behavior and differentiation markers in the skin.

This research reported that dermal progenitor cells can enhance split-thickness skin graft outcomes by improving dermal layer qualities and reducing itch and offer potential in skin wound healing using a flowable hydrogel for better cell delivery and survival.

This study found that Lrig1-positive cells in mouse epidermis are a previously unidentified source of adult interfollicular epidermal stem cells, which can contribute to sebaceous gland and epidermal lineage formation.

This review discusses recent research on the cell sources and signaling pathways involved in wound-induced hair follicle neogenesis, noting its complexity and association with immune responses, but reports no new experimental findings.

This study concluded that the hairless protein interacts with the vitamin D receptor to repress transcription crucial for hair cycling, employing multiple protein interfaces and modulating chromatin structure.