GHK-CU

What is GHK-CU?

GHK-Cu is a naturally occurring copper-binding tripeptide (Gly-His-Lys) found in human plasma, saliva, and urine. Research has examined its role in tissue remodeling, collagen synthesis, antioxidant activity, and gene expression regulation. Levels of GHK-Cu are known to decline with age, making it a subject of interest in aging biology research.

GHK-CU (Copper Peptide GHK-Cu) is supplied strictly as a reference material for in vitro and preclinical investigation. All characterization data described here is drawn from peer-reviewed literature and laboratory analysis; nothing herein constitutes a claim of clinical effect in humans.

Documented Research Areas

The following domains summarize directions explored across published studies and laboratory models. Each reflects observations reported in rodent models, in vitro systems, or the peer-reviewed record.

Mechanistic Pathway

Mechanistic steps below are hypothesized from in vitro assays and animal-model data reported in the literature. They describe biochemical interactions observed under controlled experimental conditions.

1. 1

   Copper Transport & Delivery

   GHK-Cu acts as a copper transport complex, delivering copper ions to cells. Copper is an essential cofactor for numerous enzymes including lysyl oxidase, which crosslinks collagen and elastin.

2. 2

   TGF-β & Collagen Signaling

   Research has documented GHK-Cu's modulation of TGF-β signaling pathways, influencing collagen synthesis, wound healing gene expression, and fibroblast activity in vitro.

3. 3

   Antioxidant Enzyme Activation

   GHK-Cu has been shown to increase superoxide dismutase (SOD) activity in cell culture models, contributing to observed reductions in reactive oxygen species and oxidative damage markers.

4. 4

   DNA Repair Pathway Modulation

   Gene expression analyses have identified GHK-Cu-mediated upregulation of DNA repair genes, including those in the nucleotide excision repair pathway, in human fibroblast cell cultures.

Molecular Specifications

Selected Literature

The following peer-reviewed references informed the research summaries on this page. Citations are provided for scientific context only.

1. Pickart L & Margolina A. (2018). Regenerative and protective actions of the GHK-Cu peptide in the light of the new gene data. International Journal of Molecular Sciences, 19(7), 1987.
2. Pickart L, et al. (2012). The human tripeptide GHK-Cu in prevention of oxidative stress and degenerative conditions of aging. Rejuvenation Research, 15(2), 185–199.
3. Finkley MB, et al. (2007). Influence of GHK peptide on gene expression relevant to nervous system function and cognitive decline. Brain Research Bulletin, 74(1–3), 91–98.
4. Maquart FX, et al. (1993). Stimulation of collagen synthesis in fibroblast cultures by the tripeptide-copper complex glycyl-L-histidyl-L-lysine-Cu2+. FEBS Letters, 238(2), 343–346.
5. Simeon A, et al. (1999). Expression of matrix metalloproteinases and tissue inhibitor of metalloproteinases by fibroblasts treated with the tripeptide-copper complex. European Journal of Biochemistry, 261(1), 174–181.