32 citations
,
May 2015 in “Journal of Investigative Dermatology” This study found that collagen VI influences hair follicle growth and wound-induced regrowth by activating the Wnt/β-catenin signaling pathway in mice, suggesting potential therapeutic targets for hair loss.
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.
September 2025 in “bioRxiv (Cold Spring Harbor Laboratory)” In this study, researchers developed non-invasive methods to monitor hair shaft, melanin, and collagen dynamics in C57BL/6 mice across different hair follicle cycle phases, supporting non-invasive research in hair loss treatment development.
August 2026 in “Pharmacological Research - Modern Chinese Medicine” In this study, topical applications of Agrimonia pilosa extract and agrimonolide demonstrated notable anti-inflammatory and wound healing benefits in animal models, significantly reducing inflammation and enhancing wound closure compared to controls. However, further research in humans is needed to confirm these preclinical findings.
April 2023 in “Journal of Investigative Dermatology” In this study, recombinant type III collagen was found to promote fibroblast proliferation and migration, suggesting potential anti-aging and repairing effects, although it was only effective in significantly inhibiting IL-6, not TNF-α, secretion.
October 2022 in “International Journal of Molecular Sciences” This study found that collagen peptides from Mozambique tilapia significantly promoted hair regrowth and increased the proliferation of hair growth factors in vitro and in vivo, suggesting potential as supplements for hair loss prevention.
63 citations
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March 2018 in “Experimental Dermatology” This review explores the physiological roles of collagen XVII in the epidermis, its involvement in stem cell maintenance, and its connections with signaling pathways, but it reports no new results.
12 citations
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September 2023 in “Polymers” This study reported that a newly developed hydrogel composed of recombinant type I collagen and chitosan, incorporating a metal–polyphenol structure, demonstrated strong mechanical and healing properties, effectively promoting wound healing in a full-thickness skin defect model.
9 citations
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March 2019 in “Molecular & cellular proteomics” In this study, around 1% of proteins in skin fibroblasts significantly changed in response to reductive stress, affecting collagens and MAPK signaling pathways.
2 citations
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August 2023 in “Marine drugs” In this study, fish-derived collagen hydrolysate from tilapia scales improved hair growth and skin health in both cellular and mouse models, reducing oxidative stress and inflammation while enhancing hair quality and promoting beneficial gene expression.
December 2025 in “Frontiers in Nutrition” This review suggests that although hydrolyzed collagen peptides with certain supplements may improve skin elasticity and joint function, evidence for collagen's anti-aging and regenerative benefits remains inconsistent.
January 2025 in “Scripta Medica” In this study, PDO, PLLA, and PCL thread implants in ageing rat skin did not alter MMP1 gene expression but maintained collagen levels similar to young skin without UV-B exposure, suggesting possible benefits for skin collagen but not gene expression modification.
January 2019 in “Archives of dermatology and skin care” This study found that combining microneedling with oral collagen supplementation may improve wrinkles and texture better than microneedling alone for skin rejuvenation.
9 citations
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August 2024 in “Tissue Engineering and Regenerative Medicine” In this study, researchers suggest that strategic early intervention during fetal wound healing could lead to significantly improved long-term skin regeneration outcomes.
7 citations
,
April 2020 in “Applied Sciences” 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.
5 citations
,
January 2012 in “Journal of Tissue Science & Engineering” In this study, collagen I decellularized scaffolds enhanced the growth and melanotic properties of hair follicle melanocytes, suggesting their potential as effective carriers for transplantation in vitiligo treatment.
March 2026 in “Food, Nutrition and Health.” This review highlights research reporting that oral collagen peptide supplements are effective in enhancing skin elasticity, hydration, and reducing wrinkles, although results vary across studies. Oral supplementation was generally well-tolerated, and further investigation is needed to optimize formulations and explore topical application challenges.
January 2026 in “Bioengineering” 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.
226 citations
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May 2004 in “Journal of Biological Chemistry” 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.
119 citations
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November 1969 in “Journal of Ultrastructure Research” Macrophages help break down collagen around hair follicles during hair growth.
109 citations
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December 2003 in “American Journal of Pathology” This study observed that the ontogenetic transition from scarless repair in early fetal rat wounds to scar-forming repair in late gestation is associated with differential TGF-β ligand and receptor expression patterns.
59 citations
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September 2011 in “Lasers in Medical Science” This study concluded that the 800-nm diode laser is effective in enhancing skin structure and collagen expression via the TGF-β/Smad pathway, suggesting potential for non-ablative rejuvenation.
56 citations
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December 1990 in “Differentiation” Growth factors can either promote or inhibit hair follicle cell growth and collagen breakdown.
48 citations
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March 2020 in “Stem Cell Research & Therapy” This study found that human adipose-derived stem cells co-cultured on a collagen sponge scaffold showed increased differentiation into keratinocytes, suggesting potential for improved skin wound healing.
42 citations
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February 2000 in “Journal of Investigative Dermatology” This study found that Gelatinase A activity is linked to the absence of type VII collagen during human fetal skin development, indicating its role in remodeling the basement membrane zone.
38 citations
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June 2005 in “Matrix Biology” Minoxidil affects collagen-related genes, potentially helping treat fibrosis.
36 citations
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October 2015 in “Journal of Cosmetic Dermatology” In this study, a new apple stem cell extract serum significantly improved signs of skin aging and enhanced cell metabolism in human senescent fibroblasts, showing visible effects after one week of use.
36 citations
,
January 2007 in “Archives of Histology and Cytology” This study suggests that the absence of alpha5(IV)/alpha6(IV) chains in certain subepidermal basement membrane spots may relate to interactions with melanocytes in human skin.
34 citations
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September 2020 in “Clinical, cosmetic and investigational dermatology” This research found that hyaluronic acid increased cell proliferation and type I collagen more effectively than poly-L-lactic acid in both human fibroblast cultures and rat dermis.
31 citations
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December 2021 in “Materials” In a study using a mouse model of diabetes, chitosan-based hydrogels increased healing markers and improved wound closure and tissue repair compared to untreated wounds, but human efficacy needs further validation.