GHK-Cu Peptide

GHK-Cu is a naturally occurring peptide made of just three amino acids (glycine, histidine, and lysine) bound to a copper ion. It was first identified in human plasma in the 1970s, and what makes it unusual is how much influence such a small molecule appears to have. Genomic studies using tools like the Broad Institute Connectivity Map found that GHK-Cu can shift the expression of over 4,000 genes, many of which are tied to how cells build collagen, elastin, and other structural proteins.

In cell culture experiments, researchers have studied how GHK-Cu affects fibroblasts, the cells responsible for producing collagen and maintaining connective tissue. It appears to influence the activity of enzymes called matrix metalloproteinases (MMPs), which act like molecular scissors that break down and recycle old collagen. The copper component also plays a role in the chemistry of how cells manage oxidative stress, working with antioxidant enzymes like superoxide dismutase.

Animal research has explored GHK-Cu in the context of blood vessel development and inflammatory signaling. It has been associated with changes in VEGF levels (a protein that promotes new blood vessel growth) and with shifts in inflammatory molecules like TNF-alpha and interleukin-6. The combination of gene expression effects, structural protein research, and the copper-peptide chemistry makes GHK-Cu one of the more broadly studied compounds in extracellular matrix research. For Research Use Only. Not intended for human or veterinary use.