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This study reports the successful differentiation of mouse induced pluripotent stem cells into keratinocytes that can regenerate skin and its structures in an in vivo environment.

This review discusses the mechanisms behind hair patterning during mouse embryonic development and reports no new experimental findings.

In a transgenic mouse model, this study found that overexpression of keratin 16 in skin keratinocytes led to hyperkeratosis and increased EGF receptor signaling, altering skin cell behavior and structure.

In this study, polydopamine emerged as a safe and effective alternative to traditional hair dyes like PPD for dyeing gray hair permanently, showing resistance to detergents and causing less toxicity and hair loss in mice.

This study describes trichilemmal keratinization as a distinct process of hair follicle keratinization that occurs in specific areas of the outer root sheath, illustrated using electron microscopy on dog hair.

This study found that the vitamin D receptor is crucial for initiating the postnatal hair follicular cycle in mice, preventing alopecia associated with its inactivation.

This study found that a 3D Matrigel culture technique for dermal papilla cell spheroids can enhance hair follicle inductivity and induce hair-like fiber differentiation in vitro, even with high-passage cells.

This review summarizes the use of 3D printing technologies for creating microneedles and evaluates their associated benefits, challenges, and regulatory considerations, but does not present new experimental results.

In this study, a newly developed nanoparticle-loaded hydrogel wound dressing demonstrated significant antibacterial, antioxidant, anti-inflammatory, and proangiogenic activities, effectively reducing pain and promoting healing in a murine burn wound model while preventing infection by *Staphylococcus aureus*.

This article provides an overview of microneedle technology for transcutaneous drug delivery, discussing microneedle designs, materials, and activation methods that enhance drug stability and regulated release, and outlines considerations for their successful clinical implementation, such as biocompatibility and production cost.

This study found that the formation of the fibre cuticle surface in Merino sheep is similar to the epidermal stratum corneum process and not from a modified plasma membrane as previously thought.

This study found that administering melatonin to ferrets can advance the timing of fur growth and reproductive cycles influenced by daylength and hormonal control.

This study found that female rhesus macaques who gained hair showed a significant reduction in hair cortisol concentrations, suggesting a connection between hair regrowth and stress levels.

This study identified the placenta at the base of the ovary as the origin of poplar seed hair development and detailed transcriptome dynamics during the growth process.

This review discusses the challenges of traditional phytochemical delivery methods and highlights the potential of microneedles to improve intra/transdermal delivery, reporting no new clinical results.

This research found that immobilizing type I atelocollagen onto artificial hair significantly improved the adhesion and long-term fixation of the hairs in the human scalp, indicating high biosafety and enhanced tissue integration.

This review discusses the biological properties and potential applications of PCL and barium titanate composites in biomedical fields and reports no new experimental findings; the authors highlight the need for further research.

This study found that adrenal hormones appear to inhibit winter fur growth onset in mink and may affect the duration of inactivity between fur growth periods.

This study developed a nanoscale biomimetic matrix that effectively and stably expands human hair follicle stem cells, offering a new tool for hair follicle reconstruction research.

In this study, dogs with sebaceous adenitis were treated with oral vitamin A, but responses varied widely, showing improvements in some cases while others experienced no benefit.

This study found that targeting SV40 T antigen expression to hair follicles in transgenic mice caused abnormal hair structure and hair loss, but did not lead to cell immortalization or tumor formation in follicles.

This study demonstrates that human hair follicle stem cells can be cultured and expanded without major changes to their phenotypes, which suggests potential for use in regenerative medicine.

This study found that a non-ionic ethosomal carrier system significantly improved the delivery and adsorption of black tea extracts onto hair surfaces in vitro, suggesting its potential as a hair dye and protective agent.

This review discusses the role of the unliganded vitamin D receptor in hair follicle cycling and tumor formation in mice and reports no new experimental findings.

This study suggests that decorin may help maintain hair follicle stem cells and its reduced expression could contribute to age-related hair loss.

This study demonstrates that Rac1 activity is essential for normal hair follicle formation but influences hair structure and pigmentation, in terminal differentiation, through alterations in hair shaft, cuticle, and pigmentation organization.

In this study, electron microscopy of follicular mucinosis showed severe cytoplasmic degeneration in hair follicles, with myelin figures and onion-like lamellar structures, but no indications of mucin release through degeneration or degradation were found.

This study found that medroxyprogesterone injections led to partial or complete hair regrowth in some Pomeranian dogs with alopecia X, though their IGF-1 levels remained unchanged.

This animal study found that second generation mice exposed to excess zinc during gestation and lactation had reduced plasma copper, body weight, and hematocrit, with lighter and delayed hair development compared to mice on a normal zinc diet.

This article reviews recent developments in microneedles combining metallic elements and herbal compounds for wound healing, highlighting their benefits such as enhanced therapeutic efficacy and reduced toxicity, and offering a reference for future advancements in this technology.