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This article reviews dermatological research on black skin, emphasizing its unique physiological characteristics and common conditions like acne and eczema, and suggests more focus is needed on its structural differences and clinical responses.

In this study, synchrotron-powered infrared microscopy revealed that hair follicles are a favored penetration pathway for cyanophenol and ethylhexyl methoxycinnamate in human skin, without altering protein secondary structure.

In a rat skin wound model, this study observed that a composite dressing using chitosan hydrogel and exosomes derived from adipose mesenchymal stem cells enhanced wound healing by promoting collagen deposition, angiogenesis, and regeneration of hair follicle structures.

This study used an ex vivo human skin model to show that tropical conditions disrupt skin homeostasis, resulting in epidermal thickening and junctional flattening, and found that Kombucha tea extract may help preserve skin structure under such stress.

In this study, oral administration of wheat sprout extract significantly protected rats against skin damage caused by acrylamide exposure by enhancing antioxidant defenses, reducing oxidative stress, and preserving skin structure, highlighting its potential as a sustainable protective agent against environmental skin toxins.

In a study on wound healing, researchers described injectable POEGMA‐DA hydrogels as a promising non-toxic alternative to traditional wound closure methods, showing effective tissue adhesion and enhanced regeneration of skin structures in a mouse model without significant inflammation.

This study investigated tissue healing in cats with auto skin grafts, finding that those treated with a combination of platelet-rich plasma and tilapia skin bio-dressings showed improved tissue structure, reduced collagen density, and more widespread caspase-3 expression compared to other treatments.

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 observed that processing techniques such as degreasing, bating, and tanning influence mink skin by altering the distribution of fat glands and collagen fibers, potentially impacting hair follicle structure and mink product quality.

In this study, researchers developed an innovative wound healing patch combining electrical and chemical components, which effectively guided recovery in animal scald models by promoting collagen deposition and the regeneration of skin structures.

This study found that collagen VI is crucial for peripheral nerve function and regeneration, and its absence promotes abnormal hair regrowth after skin wounding in mice, revealing potential therapeutic targets for nerve injuries and hair loss.

This study observed distinct changes in the ultrastructure of Hexi cashmere goat hair follicles throughout the year, highlighting stages with specific cellular and structural characteristics.

In this study, ultrasound was found to alter the distribution of fibronectin in collagen hydrogels, leading to enhanced microtissue formation, suggesting potential applications in tissue engineering.

This review reports that oral collagen peptide supplements may improve skin elasticity, hydration, and wrinkle appearance while also supporting hair and nail health and wound healing, but emphasizes the need for longer, high-quality studies due to current research limitations and variability in findings.

This study found that high-concentration cell-free adipose extract effectively reduced collagen deposition and blood vessel formation in a rabbit ear model, showing promise for preventing and treating hypertrophic scars.

In this review, various expression systems for synthesizing recombinant collagen are compared, highlighting their efficiency, modification capabilities, and cost. Key purification techniques are also analyzed, and challenges like reducing R&D costs and improving safety protocols are identified.

This study identified collagen XXII as a novel extracellular matrix protein specifically present at tissue junctions, where it functions as a cell adhesion ligand for skin epithelial cells and fibroblasts.

In this study, KC-AD-MSCs were found to increase COL7 deposition and anchoring fibril formation at the dermal-epidermal junction in a RDEB mouse model, suggesting potential for improving skin integrity in recessive dystrophic epidermolysis bullosa patients.

This study found that in a rat skin model, fat cells inhibited the proliferation of organoid hair follicle cells and fibroblasts but may have accelerated hair follicle cell differentiation.

This narrative review explores how psychological stress may contribute to premature skin aging by affecting dermal collagen and elastin remodeling through neuroendocrine, molecular, and cellular pathways, highlighting potential therapeutic targets to preserve skin structure and function.

In this study, researchers observed that hidradenitis suppurativa lesions were associated with reduced collagen and elastin, and increased neovascularization in areas with chronic inflammation.

The study identified increased IL-24 expression in keratinocytes and fibroblasts exposed to particulate matter, contributing to skin aging by promoting conditions similar to age-related changes such as increased MMP1 expression and decreased type I collagen production.

This narrative review examines the structure-function relationship in bioactive biopolymers used to promote healing in chronic wounds, emphasizing diabetic ulcers, and underscores the importance of characterizing these biopolymers to enhance their bioactivity for better tissue regeneration outcomes.

This study examined the unique structural features of sinus hair follicles in the shrew Sorex unguiculatus, which suggest a specialization for vibration sensing.

This study found that in anagen hair follicles, the basement membrane zone components showed decreased expression in the lower hair bulb, with a complete absence of BP230 at the dermal papilla junction, suggesting an incomplete hemidesmosome structure in these regions.

Canine skin has two main layers: the epidermis and dermis, with a supportive subcutis layer.

In an animal study with a skin defect model, this research reported that curcumin-loaded hydrogels made from recombinant humanized collagen and an eco-friendly crosslinker enhanced wound repair by promoting angiogenesis, granulation tissue formation, and hair follicle neogenesis, while providing antioxidant benefits.

This study found that dermal papilla cells and bulge stem cells can potentially be used to reconstruct hair follicles, as hair follicle-like structures were observed after culturing under a rat's renal capsule.

In this study, researchers found that changes in the extracellular matrix components, particularly fibronectin, laminin, and type IV collagen, during the rat vibrissa follicle growth cycle, suggest dynamic remodeling related to dermal-epidermal signaling.

This study investigated the effects of a recombinant human collagen complex on hair growth, finding it enhanced survival and function of hair follicle stem cells and promoted hair growth in rat models, suggesting its potential for hair loss prevention and hair health maintenance.