43 citations
,
July 1994 in “Journal of Cell Science” This study found that the extraction-resistant structures in hair, feathers, and hagfish teeth are due to ε-(γ-glutamyl)lysine cross-linked proteins, emphasizing their role in maintaining the integrity of these materials.
1 citations
,
January 1987 in “PubMed” This study found that a 1% 11a-hydroxyprogesterone lotion appeared to increase hair growth parameters in male androgenetic alopecia patients compared to untreated controls.
99 citations
,
May 1998 in “Journal of biological chemistry/The Journal of biological chemistry” This study found that small proline-rich proteins modify the biomechanical properties of cornified cell envelopes in rodent forestomachs, potentially affecting the tissue's ability to withstand mechanical stress.
2 citations
,
December 1994 in “International Journal of Cosmetic Science” In this study, the combination of biologically engineered hyaluronic acid and polyquaternium-10 improved hyaluronic acid's retention and moisturizing effects on hair by forming a stable complex that increased binding affinity to keratin.
5 citations
,
October 2013 in “Experimental Dermatology” This study observed that putrescine and HR form a negative feedback mechanism affecting hair cycling, indicating a significant connection between HR, polyamines, and hair growth regulation.
80 citations
,
June 2002 in “Molecular Biology of the Cell” This study found that type II keratins in proliferating epithelial tissues are phosphorylated at a conserved motif during mitosis and stress, impacting keratin solubilization and reorganization.
1 citations
,
August 2023 in “Biomolecules & therapeutics” In this study, researchers found that recombinant human HAPLN1 promoted hair growth in mice and human hair matrix cells by activating specific signaling pathways, suggesting it may offer a potential hair loss treatment with fewer side effects than existing medications.
February 2025 in “International Journal of Cosmetic Science” This research studied European human hair, finding that cysteic acid and protein carbonylation increased with both chemical and photochemical oxidation. Protein carbonylation was highlighted as a more sensitive marker for photochemical oxidation, providing better in situ visualization of hair damage than cysteic acid.
47 citations
,
October 2021 in “Journal of Nanobiotechnology” This study found that hollow polydopamine nanoparticles enhanced the regenerative potency of the peptide RL-QN15, suggesting potential for improved therapeutic approaches in skin wound healing.
32 citations
,
January 2000 in “Human Heredity” This study found that the mutation Glu402Lys in keratin hHb6 may be associated with monilethrix, and homozygous patients in a consanguineous family exhibited more severe symptoms.
51 citations
,
September 2012 in “Biomacromolecules” This study found that disulfide bonds in keratin increase its strength and toughness, with some loss of α-helical structure under load, highlighting their role in trichocyte α-keratin's mechanical properties.
17 citations
,
August 2018 in “BMC Genomics” The researchers found that HOXC13 regulates different keratin proteins in a mixed manner, with certain SNPs impeding this regulation, while also demonstrating negative-feedback by HOXC13 and positive regulation by LEF1 and melatonin on the HOXC13 promoter.
January 2024 in “Archives of Biological Sciences (Beograd)” This study found that AP collagen peptides can promote hair growth by supporting the health of hair follicle cells, as they stimulate cell proliferation, counteract apoptosis, and enhance antioxidant enzyme expression, suggesting potential as a treatment for hair loss.
10 citations
,
August 2013 in “Experimental Dermatology” This study found that Hairless (HR) and putrescine form a negative regulatory network that impacts epidermal homeostasis and hair follicle cycling, linked to the MYC superfamily's regulation of ODC expression.
262 citations
,
May 2020 in “Advanced Functional Materials” This study demonstrated that a newly developed polypeptide-protein hydrogel with vascularization and antibacterial properties promoted tissue regeneration and hair follicle formation in infected wound healing.
January 2026 in “Frontiers in Medicine” In this study, PP-PTKL exhibited antioxidant, anti-inflammatory, and pro-melanogenic effects in laboratory settings, suggesting its potential role in preventing or treating hair greying. Further animal and human studies are needed to verify these findings.
September 2016 in “Journal of Dermatological Science” This study reports a case of GGCX syndrome in a 55-year-old Japanese male, characterized by PXE-like symptoms and coagulation deficiency, with an unreported phenotype of possible spinocerebellar degeneration.
April 2016 in “Journal of Investigative Dermatology” This study found that the peptide derivative beta-Ala-Pro-Dab-NHbenzyl may reduce wrinkles and sebum production in human skin by inhibiting dipeptidyl peptidase 4, suggesting potential for acne and skin inflammation treatment.
7 citations
,
January 2021 in “Evidence-based complementary and alternative medicine” This study suggests that porphyra-334 may have antiaging properties, promoting collagen synthesis, improving periorbital wrinkles, and supporting hair follicle growth through gene regulation.
5 citations
,
January 2011 in “International Journal of Cosmetic Science” This study found that 1,2,3,4-tetrahydroquinoline derivatives, particularly N-methyl-7-amino-1,2,3,4-tetrahydroquinoline, may be excellent blue dye candidates for human hair, offering superior color purity, stability, and fastness compared to 2,3-dihydroindoles.
85 citations
,
March 2008 in “Journal of Cell Science” This study created transgenic mouse models with the LMNA gene mutation common in Hutchinson-Gilford progeria syndrome, revealing skin and teeth abnormalities related to transgene expression levels.
May 2026 in “Iranian journal of pharmaceutical research” This study found that HAMA hydrogels promote faster healing of skin wounds in mice by enhancing the accumulation of anti-inflammatory macrophages and increasing type III collagen in the local wound environment.
7 citations
,
May 1995 in “The journal of investigative dermatology/Journal of investigative dermatology”
4 citations
,
August 2014 in “Journal of molecular structure” In this study, the authors concluded that a hydrolyzed eggwhite protein treatment promoted the reconnection of disulfide bonds in excessively bleached hair, after reduction and oxidation processes in permanent waving.
1 citations
,
April 2023 in “Scientific Reports” This study reported that newly developed RADA16-I peptide hybrids, with active motifs like GHK and KGHK, demonstrated improved wound healing in a mouse skin injury model without cytotoxicity, suggesting they might be effective scaffolds for tissue engineering and regeneration.
13 citations
,
July 2017 in “Biopolymers” This study presents recombinant human hair keratins K31 and K81, observing novel nanostructures from their self-assembly and emphasizing disulfide crosslinking's role in this process.
1 citations
,
April 2021 in “Journal of Cosmetic Dermatology” In this placebo-controlled clinical study, a cream containing 4% capryloyl glycine and 1% glycine soy‐fermented extract effectively inhibited ODC1 activity and improved hypertrichosis in 91.7% of Caucasian female patients on the forearms, whereas no improvement was observed with the placebo.
This study found that a blend of low- and high-molecular weight hyaluronic acid significantly improved penetration into the hair cortex compared to individual HA types, reducing frizz and increasing hair elasticity and water content, as measured by Confocal Raman Spectroscopy.
6 citations
,
March 2018 in “Journal of Medicinal Food” This study demonstrated that water-soluble peptides from egg yolk, termed "hair growth peptide," stimulated human hair follicle cell growth and improved hair growth in female pattern hair loss.
November 2022 in “Journal of Investigative Dermatology” This study found that marine-derived collagen peptides slightly promoted hair matrix proliferation and prolonged hair growth phase in human hair follicles ex vivo, suggesting potential benefits for hair loss treatment.