GHK-Cu Research
GHK-Cu is the copper(II) complex of the naturally occurring tripeptide glycyl-L-histidyl-L-lysine, studied extensively in laboratory models of tissue remodeling, wound repair, and gene-expression modulation. Provided strictly for in-vitro and laboratory research use only.
Also known as: Copper Tripeptide-1 · CAS 89030-95-5
GHK is a tripeptide (Gly-His-Lys) that binds copper(II) with high affinity to form GHK-Cu, the form in which much of its biological activity is studied. In research models the complex influences expression of genes tied to extracellular-matrix remodeling, angiogenesis, and antioxidant defense, and it modulates pathways including TGF-β1/Smad, NF-κB, and Nrf2.
Mechanism of Action
In research systems, the activity of GHK-Cu centers on its copper-coordinating histidine residue, which lets the tripeptide bind and shuttle copper(II) ions. Research studies report that GHK-Cu modulates broad gene-expression programs governing extracellular-matrix turnover, including matrix metalloproteinases and their tissue inhibitors (the MMP/TIMP balance), as well as collagen and growth-factor signaling. It has been observed to influence the TGF-β1/Smad2/3 axis, the NF-κB inflammatory pathway, and the Nrf2 antioxidant response in experimental tissue. By promoting angiogenic signaling and raising local oxygenation in wound models, GHK-Cu is studied as a regulator of the coordinated cellular events underlying tissue repair and remodeling.
Research Applications
GHK-Cu is a long-standing subject of regenerative and dermatological research, used in experimental and cell models of wound healing, tissue remodeling, fibrosis, and oxidative stress. Research literature investigates its incorporation into biomaterials and hydrogel dressings, where it has been studied for antibacterial, anti-inflammatory, hemostatic, and neovascularization-promoting properties in infected-wound models. Researchers also examine its anti-fibrotic effects in organ-injury models and its behavior when engineered into proteolytically stable, self-assembling peptide nanostructures. Fibroblast and keratinocyte cultures serve as common in-vitro platforms. It is supplied solely for laboratory research, not for human cosmetic application or any therapeutic purpose.
Structure & Copper Coordination
GHK-Cu pairs the small tripeptide glycyl-L-histidyl-L-lysine with a single copper(II) ion. The histidine imidazole, the terminal amine, and a deprotonated amide nitrogen together form a square-planar coordination geometry that holds copper with notably high affinity — comparable to the copper-binding capacity of serum albumin. This chelation is central to the molecule's research profile: free GHK is rapidly cleaved by peptidases, whereas copper complexation improves stability and is thought to facilitate physiological copper transport in experimental systems. The naturally occurring tripeptide was first identified in human plasma and declines in abundance with age, an observation that helped drive sustained interest in GHK-Cu as a model compound for studying tissue regeneration and matrix biology.
Applications at a glance
- Model compound in wound-healing and tissue-remodeling research
- Probe for ECM, MMP/TIMP, and collagen gene-expression studies
- Research agent in fibroblast and keratinocyte cell-culture assays
- Bioactive component studied in peptide hydrogels and biomaterials