GHK-Cu

GHK-Cu Overview

GHK-Cu is a naturally occurring copper-binding tripeptide composed of glycine, L-histidine, and L-lysine (Gly-His-Lys) coordinated with a copper(II) ion. It was first isolated from human plasma in 1973, and levels have been observed to decline with age. Its copper-dependent activity is studied in fibroblast and tissue-repair models for its influence on collagen synthesis, glycosaminoglycan production, and extracellular matrix remodeling.

In research models, GHK-Cu has been examined for its modulation of matrix metalloproteinase expression, antioxidant pathway activation, and its broad influence on tissue-repair gene expression networks.

Reference: Pickart L. & Thaler M. M. (1973), Nature New Biology, 243, 85-87.

History

GHK was first identified by Pickart and Thaler in 1973 as a growth factor found in human plasma. Subsequent research through the 1980s established its high affinity for copper and characterized the GHK-Cu complex as biologically distinct from the free peptide. Later gene-expression studies published by Pickart and colleagues described GHK’s modulation of thousands of human genes concentrated in tissue-repair, antioxidant, and anti-inflammatory pathways, making it a widely-studied tool compound in regenerative research.

Reference: Pickart L. et al. (2012), BioMed Research International, 2012, 324832.

GHK-Cu Structure

Research Findings

GHK-Cu has been examined across dermal, wound-repair, and tissue-remodeling research models. Reported observations describe copper-dependent effects on fibroblast collagen synthesis with maximal effect at nanomolar concentrations, modulation of matrix metalloproteinase expression, and stimulation of glycosaminoglycan synthesis in cultured dermal cells.

Key Areas of Research:

• Extracellular matrix: Collagen and glycosaminoglycan synthesis in dermal fibroblasts
• Tissue repair: Wound-model closure and angiogenic signaling
• Gene expression: Modulation of tissue-repair, antioxidant, and anti-inflammatory pathways
• Copper delivery: Chaperone-like transport of copper ions in cellular models

These findings position GHK-Cu as a widely-used research tool for studying copper-dependent extracellular matrix biology and gene-expression networks in tissue-repair research.

References: Maquart F. X. et al. (1988), FEBS Letters, 238(2), 343-346; Pickart L. et al. (2015), Oxidative Medicine and Cellular Longevity, 2015, 648108.

References

1. Pickart L. & Thaler M. M. (1973). Tripeptide in human serum which prolongs survival of normal liver cells. Nature New Biology, 243, 85-87.
2. Maquart F. X. et al. (1988). Stimulation of collagen synthesis in fibroblast cultures by the tripeptide-copper complex GHK-Cu. FEBS Letters, 238(2), 343-346.
3. Pickart L. et al. (2012). GHK peptide as a natural modulator of multiple cellular pathways in skin regeneration. BioMed Research International, 2012, 324832.
4. Pickart L. et al. (2015). The human tripeptide GHK-Cu in prevention of oxidative stress and degenerative conditions of aging. Oxidative Medicine and Cellular Longevity, 2015, 648108.
5. Gruchlik A. et al. (2012). Effect of GHK and GHK-Cu on collagen and glycosaminoglycan synthesis in normal human fibroblasts. Acta Poloniae Pharmaceutica, 69(6), 1303-1307.