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Synergy of GHK-Cu and hyaluronic acid on collagen IV upregulation shows how GHK-Cu + HA strongly elevate collagen IV synthesis in skin fibroblasts / ex vivo skin

it upregulates heme oxygenase-1 (HO-1) and other antioxidant and detoxification genes ( + by reducing the heme-associated ferric iron (Fe + ) to Fe + ( + must then be tightly regulated, either stored within ferritin or exported by FPN, to avoid intracellular accumulation and subsequent ferroptosis ( Hepcidin can induce the internalization and degradation of FPN, thereby reducing cellular iron export and elevating intracellular iron levels ( In addition to these canonical signaling pathways, recent single-cell transcriptomic studies have revealed marked heterogeneity in ferroptosis susceptibility among chondrocyte subpopulations in OA cartilage

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