GHK-Cu (Copper Compound): A Research Overview

GHK-Cu — glycyl-L-histidyl-L-lysine complexed with copper — is a naturally occurring tricompound first isolated from human plasma by Dr Loren Pickart in 1973. It is found in blood, urine, and saliva, and its plasma concentration declines markedly with age: from approximately 200 ng/mL at age 20 to around 80 ng/mL by age 60. This age-related decline has prompted significant scientific interest in the compound's biological roles and its potential as a research tool.

Structure and Biochemistry

GHK-Cu consists of three amino acids — glycine, histidine, and lysine — chelated to a copper(II) ion. The copper coordination is central to its activity; the copper ion is held in a square-planar geometry by the nitrogen atoms of the compound backbone. This complex has a high affinity for copper, which it can both sequester and donate to copper-dependent enzymes. The molecular weight of GHK-Cu is approximately 340.4 Da, and its CAS number is 89030-95-5.

Research Areas

Skin Biology and Extracellular Matrix

The most extensively studied area of GHK-Cu research involves its effects on skin biology. In vitro studies have demonstrated that GHK-Cu stimulates the synthesis of collagen, elastin, and glycosaminoglycans in fibroblast cultures. A 2015 study published in BioMed Research International by Pickart et al. reviewed the compound's capacity to activate the TGF-β pathway, which regulates collagen production and wound contraction. Research has also shown GHK-Cu upregulates the expression of matrix metalloproteinases (MMPs) and their inhibitors (TIMPs), suggesting a role in extracellular matrix remodelling.

Gene Expression Modulation

One of the more striking findings in GHK-Cu research is its apparent capacity to modulate gene expression on a broad scale. A 2012 analysis by Pickart and Margolina, using the Broad Institute's Connectivity Map database, found that GHK-Cu reversed the expression of genes associated with metastatic colon cancer, returning them toward a more normal pattern. The same analysis identified significant overlap between GHK-Cu's gene expression signature and that of genes associated with healthy ageing. These findings have been published in Organogenesis (2012) and Biochemistry Research International (2015).

Antioxidant and Anti-inflammatory Activity

GHK-Cu has been studied for its antioxidant properties, particularly its ability to upregulate superoxide dismutase (SOD) and catalase activity. In cell culture studies, it has been shown to reduce oxidative stress markers and inhibit the expression of pro-inflammatory cytokines including TNF-α and IL-6. A 2018 study in Frontiers in Aging Neuroscience examined GHK-Cu's neuroprotective potential, noting its ability to reduce lipid peroxidation in neuronal models.

Wound Healing Models

Animal studies have examined GHK-Cu's effects on wound healing. Research in rodent models has demonstrated accelerated wound closure, increased angiogenesis, and improved tensile strength of healed tissue when GHK-Cu was applied topically or administered subcutaneously. A 1994 study by Mulder et al. in Wound Repair and Regeneration reported enhanced healing in chronic wound models. More recent work has focused on the compound's interaction with stem cell populations at wound sites.

Hair Follicle Research

GHK-Cu has been studied in the context of hair follicle biology. In vitro studies have shown it can stimulate the proliferation of dermal papilla cells, which are critical for hair follicle cycling. A 2007 study published in the Journal of Investigative Dermatology examined the role of copper compounds in hair follicle morphogenesis, noting upregulation of vascular endothelial growth factor (VEGF) as a potential mechanism.

Pharmacokinetics and Stability

GHK-Cu is water-soluble and relatively stable in solution at physiological pH. Its small size allows for transdermal penetration, which has been exploited in topical formulations used in cosmetic research. When administered systemically in animal models, it has a short half-life due to rapid enzymatic degradation, though the copper ion may be retained by endogenous copper-binding proteins such as ceruloplasmin and albumin.

Research Specifications

Important Notice

All information presented here is intended for educational and research purposes only. GHK-Cu supplied by Compoundx is for laboratory research use and is not intended for human consumption, therapeutic use, or veterinary application. Researchers should consult relevant institutional guidelines and applicable regulations before use.

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Compoundx supplies research-grade GHK-Cu at >99% purity, verified by HPLC and mass spectrometry. View product → [blocked]