Summary
GHK-Cu is a naturally occurring copper-binding tripeptide (glycyl-L-histidyl-L-lysine + copper II) studied for several decades in literature on copper-dependent remodeling, extracellular-matrix proteins, and gene-expression modulation.
Overview
The GHK-Cu complex forms when the GHK tripeptide binds a copper(II) ion. The complex is found endogenously in serum, saliva, and urine, and its concentrations decline measurably with age in human samples. It is studied as a reference compound in copper-dependent biological chemistry.
Research Background
GHK was identified by Loren Pickart in the 1970s as a copper-binding tripeptide present in human plasma. Pickart and colleagues have published extensively on its biochemistry, gene-expression effects, and broad activity across cell-culture model systems. The full research history now spans more than five decades.
Mechanisms Studied
Mechanistic interest centers on the copper-transport role of GHK, modulation of copper-dependent enzymes such as superoxide dismutase, and broad transcriptional effects in cell-culture models. Microarray studies by Pickart and colleagues have characterized large numbers of genes whose expression changes in response to GHK-Cu exposure.
Published Research Summary
Pickart and Margolina (2018) provide a comprehensive review of GHK-Cu’s regenerative and protective activity. Pickart, Vasquez-Soltero, and Margolina (2015) report microarray data on broad gene-expression changes in cultured cells. Maquart et al. (1988) reported one of the earlier studies of GHK-Cu effects on extracellular-matrix synthesis.
Quality & Verification
For research compounds, lot-level documentation is the starting point for any analytical work. Researchers commonly examine batch-specific Certificates of Analysis, reversed-phase HPLC purity readouts, mass-spectrometry confirmation of molecular weight, and lot identification to evaluate compound identity, purity, and consistency before downstream experiments.
References & Published Research
- Pickart L, Margolina A — Regenerative and Protective Actions of the GHK-Cu Peptide in the Light of the New Gene Data
- Pickart L, Vasquez-Soltero JM, Margolina A — GHK Peptide as a Natural Modulator of Multiple Cellular Pathways in Skin Regeneration
- Maquart FX et al. — Stimulation of collagen synthesis in fibroblast cultures by the tripeptide-copper complex glycyl-L-histidyl-L-lysine-Cu²⁺