GHK-Cu Stimulated Collagen Production at Extremely Low Concentrations
The copper peptide GHK-Cu stimulated collagen synthesis in fibroblasts starting at just 10 picomolar — with peak effect at 1 nanomolar — independent of cell growth.
Quick Facts
What This Study Found
GHK-Cu stimulated collagen synthesis in fibroblast cell cultures. The effect began at concentrations between 10 picomolar (10^-12 M) and 100 picomolar (10^-11 M), an extraordinarily low threshold.
The stimulation maximized at 1 nanomolar (10^-9 M). Above this concentration, the effect plateaued.
The collagen increase was independent of cell number changes. GHK-Cu was not simply making more cells; it was making existing cells produce more collagen.
A GHK tripeptide sequence (glycine-histidine-lysine) exists naturally within the alpha 2(I) chain of type I collagen. The authors proposed that when wounds break down collagen, proteases could release GHK fragments. These fragments would then bind copper and stimulate new collagen production at the wound site, creating a self-healing feedback loop.
Key Numbers
How They Did This
Fibroblast cell cultures were treated with GHK-Cu at various concentrations. Collagen synthesis was measured biochemically. Cell counting confirmed the effect was not due to increased cell proliferation. Structural analysis identified the GHK motif within type I collagen.
Why This Research Matters
This study provided the biochemical basis for GHK-Cu's wound healing effects. The picomolar activity is remarkable because most peptides need much higher concentrations to work. The collagen feedback theory (wounds release GHK, which stimulates repair) is elegant and explains why this peptide is found in blood plasma.
The Bigger Picture
GHK-Cu is one of the most potent known stimulators of collagen synthesis. Its effectiveness at picomolar concentrations and presence in human blood makes it a natural wound healing signal with significant therapeutic potential.
What This Study Doesn't Tell Us
In vitro cell culture study. The picomolar activity is impressive but needs confirmation in living tissue and whole organisms. The collagen feedback theory from wound sites, while logical, was not directly demonstrated. Only fibroblasts were tested; effects on other cell types were not examined.
Questions This Raises
- ?Is collagen-derived GHK a natural wound healing feedback signal?
- ?Can topical GHK-Cu treat chronic wounds and skin aging?
- ?What is the mechanism at such low concentrations?
Trust & Context
- Key Stat:
- Active at 10 picomolar Extraordinarily low concentration — suggesting high-affinity receptor-mediated signaling
- Evidence Grade:
- Preliminary in-vitro study in fibroblast cultures — strong dose-response but limited to cell culture.
- Study Age:
- Published in 1988 — one of the earliest demonstrations of GHK-Cu collagen-stimulating activity.
- Original Title:
- Stimulation of collagen synthesis in fibroblast cultures by the tripeptide-copper complex glycyl-L-histidyl-L-lysine-Cu2+.
- Published In:
- FEBS letters, 238(2), 343-6 (1988)
- Authors:
- Maquart, F X(3), Pickart, L, Laurent, M, Gillery, P, Monboisse, J C, Borel, J P
- Database ID:
- RPEP-00080
Evidence Hierarchy
Frequently Asked Questions
What is GHK-Cu?
A small three-amino-acid peptide (glycine-histidine-lysine) bound to copper. It occurs naturally in human blood and declines with age. It stimulates collagen production, wound healing, and skin repair.
Why does it work at such tiny amounts?
The picomolar activity suggests GHK-Cu works through a high-affinity receptor, meaning cells have specific detection machinery tuned to respond to very small amounts of this natural signal.
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Cite This Study
https://rethinkpeptides.com/research/RPEP-00080APA
Maquart, F X; Pickart, L; Laurent, M; Gillery, P; Monboisse, J C; Borel, J P. (1988). Stimulation of collagen synthesis in fibroblast cultures by the tripeptide-copper complex glycyl-L-histidyl-L-lysine-Cu2+.. FEBS letters, 238(2), 343-6.
MLA
Maquart, F X, et al. "Stimulation of collagen synthesis in fibroblast cultures by the tripeptide-copper complex glycyl-L-histidyl-L-lysine-Cu2+.." FEBS letters, 1988.
RethinkPeptides
RethinkPeptides Research Database. "Stimulation of collagen synthesis in fibroblast cultures by ..." RPEP-00080. Retrieved from https://rethinkpeptides.com/research/maquart-1988-stimulation-of-collagen-synthesis
Access the Original Study
Study data sourced from PubMed, a service of the U.S. National Library of Medicine, National Institutes of Health.
This study breakdown was produced by the RethinkPeptides research team. We analyze and report published research findings without making health recommendations. All interpretations are based solely on the published abstract and study data.