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The hair follicle's connective tissue is a key source of a certain collagen in human scalp skin.

This study found that low-level pulsed wave red light stimulated collagen and ATP production in human fibroblasts with significantly shorter treatment time than continuous wave light, suggesting enhanced consumer compliance for skin treatments.

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.

This study found that gypenosides from Gynostemma pentaphyllum increased procollagen synthesis in vitro and reduced periorbital wrinkles by about 14% in a clinical trial with 24 women.

In this study, araliadiol, a plant-derived compound, exhibited senomorphic effects in three dermal fibroblast senescence models, suggesting its potential as a topical treatment to mitigate skin aging by reducing certain senescence-related markers and increasing procollagen type I content.

In this study, researchers found that in mouse models of alopecia areata, the expression of immune-regulating molecules PD-L1 and PD-L2 in dermal fibroblasts is increased by activated T cells, potentially indicating a lack of negative immune control in affected skin.

In this study, combining transcranial electrical stimulation with bisphosphonate therapy in patients with postmenopausal osteoporosis resulted in a protective effect on bone collagen synthesis, as indicated by higher P1NP levels over 12 months, compared to bisphosphonates alone.

This study found that Pomiferin may effectively stimulate extracellular matrix protein expression in skin and scalp models, with results comparable to retinol, suggesting potential as a topical treatment ingredient.

This review discusses the use of methotrexate for pediatric dermatoses and reports increased use in certain conditions like psoriasis, but mainly isolated case reports for others.

This study suggests that finasteride may inhibit testosterone-induced expression of TGF-beta1 and type I procollagen, potentially explaining its role in preventing perifollicular fibrosis in androgenetic alopecia.

This research suggests that testosterone-induced expression of TGF-beta1 and type I procollagen may lead to perifollicular fibrosis in androgenetic alopecia, with finasteride inhibiting this process as a possible mechanism for its effects.

This study found that Polygoni Multiflori Radix (PMR) reduced collagenase and elastase activity after UVB damage in fibroblasts, suggesting potential anti-aging properties for cosmetic use.

This study found that RCS-01 cell therapy for aged skin was well tolerated and associated with increased gene expression related to extracellular matrix homeostasis, suggesting potential skin improvement.

In this study, researchers found that exposure to PM10 significantly increased inflammation and impaired collagen synthesis in human dermal fibroblasts, suggesting PM10 contributes to skin aging through these mechanisms.

In this study, mice exposed to prolonged space conditions demonstrated skin atrophy, altered hair follicle cycles, and significant changes in the gene expression associated with skin muscle health.

This study found that Centipeda minima and brevilin A significantly reduced oxidative stress and inflammation in human dermal fibroblasts, suggesting their potential to protect against skin aging and inflammation.

This case study reports that pancreatic enzyme replacement and fatty acid supplementation improved symptoms of fat malabsorption and essential fatty acid deficiency in a patient with EDS-4.

This study found that a mixture of plant extracts significantly improved skin barrier function, reduced inflammation, and exhibited anti-aging effects in human skin cells.

This study found that flower extracts of Wedelia trilobata may serve as a promising active ingredient for cosmeceutical products due to their antioxidant, anti-inflammatory, and antimicrobial properties.

This study found that conditioned media from human amniotic fluid-derived stem cells may enhance skin regeneration by promoting cell proliferation and migration, and by modulating gene expressions altered by UV irradiation.

In a laboratory study, Grateloupia elata extract demonstrated antioxidant and anti-aging effects by scavenging free radicals, inhibiting collagenase and elastase, increasing procollagen production, and reducing MMP-1 secretion, suggesting its potential use in functional cosmetics.

In this study, adipose-derived stem cells from human scalp were successfully directed towards chondrocyte differentiation, with TGF-beta3 and BMP-6 growth factors proving effective for in vitro chondrogenesis.

This study found that a new topical nitric oxide gel significantly accelerated burn wound healing in mice by enhancing re-epithelialization, hair follicle regeneration, collagen deposition, and angiogenesis compared to controls.

This summary explains the different types of wrinkles, their causes, and their distinct microanatomical characteristics, noting that each type may respond differently to treatments.

This review compiled evidence suggesting that flavonoids may promote skin wound healing due to their anti-inflammatory, angiogenesis, re-epithelialization, and antioxidant properties, while also discussing current limitations and future prospects for these compounds as wound-healing agents.

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.

This research review observed that topical hormone replacement therapy, particularly estradiol and estradiol-testosterone combinations, significantly increased Type I and III collagen synthesis in the skin of postmenopausal women, suggesting benefits against collagen loss-related skin aging effects such as reduced elasticity and increased dryness.

In this study, the anti-wrinkle effect of bone morphogenetic protein receptor 1a extracellular domain was significantly greater than that of retinoic acid in a mouse model, suggesting potential for BMP antagonists in skin or hair treatments.

This study found that inhibiting JAK signaling can unexpectedly trigger hair growth in resting-phase mouse skin, implicating JAK-STAT pathways and oncostatin M in maintaining hair follicle stem cell quiescence.

This review summarizes recent research on the therapeutic uses of adipose-derived stem cells for wound healing and treating skin diseases but does not provide new experimental results.