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This review synthesizes existing research on the multilayered defense system of the skin, highlighting how physical, chemical, immune, and microbial barriers work together to maintain skin health, with disruptions in one often leading to broader barrier dysfunctions.

This study highlights keratin biomaterials as a promising biocompatible option for wound healing and tissue regeneration but notes that further clinical studies are necessary to confirm their effectiveness.

In this study, researchers identified a specific DNA aptamer, Ap.OR2AT4.17, that effectively prolonged hair growth and increased hair shaft elongation in organ-cultured human hair follicles by targeting the olfactory receptor OR2AT4. This finding suggests the aptamer's potential as a novel therapy for hair loss disorders.

The researchers reported that DHT may reduce the inflammatory responses induced by C. acnes in androgen-sensitive human sebocyte cells, suggesting a potential link between androgens and infection in sebaceous disorders.

Activin increases skin tumor formation, skin Tregs help hair growth, lymph-node removal doesn't improve melanoma survival, cells can revert to stem cells in wound healing, and skin bacteria produce peptides that may treat infections.

R-spondin2 may help treat hair loss, gene differences could explain baldness, a peptide's regulation is linked to psoriasis, B-defensin gene copies may affect a skin condition's risk and severity, and potential markers and targets for alopecia areata were identified.

This study introduced a novel exosome-loaded sprayable hydrogel (ADA-aPF127@LL18/Exo) that significantly enhanced wound healing in a deep partial thickness burn model, showing improved antibacterial efficacy and promoting tissue recovery processes like epithelialization and hair follicle regeneration.

This review examines how incorporating various polymers and active ingredients into polyurethane dressings can enhance their properties and adaptability for better wound repair and regeneration, suggesting a promising direction for developing advanced functional dressings.

This case report describes an 18-year-old male with kerion celsi from Trichophyton tonsurans infection whose condition improved with terbinafine treatment, and highlights that although IL-17A expression increased in skin lesions, it was associated with disrupted antimicrobial peptide expression and severe inflammation, causing tissue damage.

This article reviews the potential benefits of GHK-Cu, EAA, and water-soluble propolis for wound healing, skin tightening, and anti-aging effects, but reports no new clinical results.

This study found that PGRP-S expression in mouse epidermis is specific to certain hair follicle epithelia, depending on the skin region, and can be transiently induced in flank skin hair follicle epithelium after exposure to Staphylococcus aureus, suggesting a role in environmental surveillance.

This review discusses the mechanisms involved in wound healing and explores the potential of nanomaterials as a promising approach to managing chronic wounds, but reports no new clinical findings.

Applying pseudoceramide improved skin and hair health.

This review discusses the role of defensin peptides in stem cell activation for potential skin rejuvenation therapies and reports no new clinical findings, emphasizing the need for further studies.

In this study, researchers found that mast cells in Erythema Toxicum lesions in newborns are actively involved in the immune response around hair follicles, but do not express the antimicrobial peptide LL-37.

This review discusses various amino acid-derived plant defensive compounds and highlights their potential as drug leads due to their potent antimicrobial properties, but reports no new experimental results.

This review discusses the health benefits and therapeutic potential of Ganoderma lucidum, but it reports no new clinical results and emphasizes the need for further research and compound discovery.

This study found that Nrf2 activation protected keratinocytes from UVB damage but also caused thickening, inflammation, and cysts, limiting its therapeutic potential for skin protection.

This study found that sebum free fatty acids may enhance the antibacterial defense of human sebaceous glands by upregulating the expression of the antimicrobial peptide hBD-2, potentially aiding in acne treatment.

This study found that sphinganine may improve scalp health, hair quality, and reduce hair loss in males, potentially due to increased antimicrobial peptide levels and inhibition of 5-α-reductase.

This systematic review highlights the diverse uses and bioactivities of Impatiens plants, particularly their antimicrobial, cytotoxic, anti-inflammatory, anti-anaphylactic, and antioxidant properties, while noting the need for more research to validate their ethnobotanical applications and isolate major bioactive compounds.

This study reports that LL-37 treatment enhances cell proliferation, migration, and secretion of regenerative factors in adipose-derived stem cells, potentially promoting hair growth in vivo.

This review discusses the potential of cathelicidins in treating skin conditions but highlights significant challenges, including unclear clinical efficacy, safety concerns, and bacterial resistance, that must be addressed for successful medical application.

This review covers presentations from the 68th Annual Meeting of the Society of Investigative Dermatology and highlights research advances in dermatology, but reports no new clinical results.

This review discusses the complexities of hidradenitis suppurativa pathogenesis, highlighting issues with Notch signaling, immune dysregulation, and the role of keratinocytes and ECM, but reports no new clinical results.

This study found that multimetal starvation by the immune protein calprotectin triggers unique regulatory responses in Pseudomonas aeruginosa, beyond those seen with individual metal shortages.

This review highlights the potential of natural hydrogels as advanced wound dressings, emphasizing their capabilities in mimicking the extracellular matrix, supporting healing, and delivering therapeutic agents for chronic and infected wound care.

This study observed that in patients with diabetic foot ulcers, an imbalance in skin microbiota, with increased pathogenic bacteria, contributes to infection and poor wound healing, and suggests that modulating microbiota composition might improve healing outcomes.

This paper reviews how studying the microbiome of the freshwater polyp Hydra can inform new, microbiome-targeting therapies for human hair follicle and skin diseases; it presents no new experimental findings.

2011 dermatological research found new skin aging markers, hair loss causes, skin defense mechanisms, and potential for new treatments.