GHK-Cu is a naturally occurring copper-binding tripeptide first isolated from human plasma in 1973 by Loren Pickart. Composed of the amino acid sequence glycyl-L-histidyl-L-lysine and bound to a copper (II) ion, this compound has since attracted considerable attention within the biochemical research community. Its measurable presence in human plasma — which declines with age — has made it a subject of ongoing investigation across multiple disciplines. This article is intended for researchers and scientific professionals seeking factual, structured information about GHK-Cu as a research compound.
Molecular Structure and Properties
GHK-Cu is classified as a tripeptide-copper complex. The tripeptide component, glycyl-L-histidyl-L-lysine (GHK), binds copper (II) ions with high affinity, forming a stable chelate. This copper coordination is considered integral to the compound’s biochemical behaviour in laboratory settings. The molecular formula of the complex is C14H24CuN6O4, with a molecular weight of approximately 403.9 g/mol.
Copper is an essential trace element involved in numerous enzymatic processes, including those mediated by superoxide dismutase and lysyl oxidase. The chelation of copper by the GHK tripeptide is understood to influence how the ion interacts within biological systems, a property that has made the compound a candidate for a range of in vitro and in vivo research protocols.
Research Background and Scientific Interest
Since its initial discovery, GHK-Cu has been the subject of a substantial body of peer-reviewed research. Early studies examined its role in wound contraction models, collagen synthesis assays, and cellular migration studies. Later work expanded into investigations of gene expression modulation. Pickart et al. (2015) documented that GHK-Cu appeared capable of modulating a broad range of human genes in laboratory models, with observed effects across pathways associated with inflammation response and tissue remodelling.
Further in vitro research has explored the compound’s interactions with fibroblast activity and extracellular matrix components. Gorouhi and Maibach (2009) provided a comprehensive review of copper peptide compounds in dermatological research contexts, noting GHK-Cu’s established profile as a research tool in skin biology models.
Researchers with an interest in longevity-associated compounds may find GHK-Cu of particular relevance. The compound’s plasma concentration has been reported to decline from approximately 200 ng/mL in young adults to significantly lower levels in older populations, a pattern that has prompted researchers to investigate its potential connections to age-related biological processes. Those exploring this area may also wish to review the broader range of longevity and anti-ageing compounds available for laboratory use.
Areas of Active Laboratory Investigation
GHK-Cu is currently investigated across several distinct research areas. The following summarises the primary contexts in which this compound appears in the scientific literature:
- Gene expression studies: Research has examined GHK-Cu’s capacity to influence a significant number of human genes in cell culture models, with particular focus on antioxidant response elements and inflammatory signalling pathways.
- Extracellular matrix research: Multiple studies have assessed the compound’s interactions with collagen, elastin, and glycosaminoglycan synthesis in fibroblast models.
- Tissue remodelling models: GHK-Cu has been studied in conjunction with wound contraction assays and dermal tissue equivalents, positioning it alongside other compounds of interest to researchers working with tissue repair research compounds.
- Antioxidant pathway investigation: In vitro assays have explored the compound’s interactions with superoxide dismutase activity and oxidative stress markers.
- Neurological research contexts: Preliminary studies have investigated GHK-Cu’s presence and activity in neural tissue models, an area that overlaps with research into cognitive and neurological compounds.
Stability and Storage Considerations for Researchers
GHK-Cu is typically supplied as a lyophilised powder. In this form, the compound demonstrates reasonable stability when stored at low temperatures, away from light and moisture. Researchers are advised to consult individual product documentation for specific reconstitution and storage protocols. Borkow (2012) noted the importance of maintaining copper peptide integrity in experimental preparations, particularly when designing assays that require sustained compound stability over extended periods.
Key Takeaways
- GHK-Cu is a copper-binding tripeptide first isolated from human plasma in 1973.
- It is composed of the sequence glycyl-L-histidyl-L-lysine complexed with a copper (II) ion.
- Plasma concentrations of GHK-Cu decline measurably with age, making it a relevant compound in longevity-focused research.
- The compound has been studied across gene expression, extracellular matrix, tissue remodelling, antioxidant, and neurological research contexts.
- It is available as a research compound for qualified laboratory use.
- Researchers can explore related compounds and supporting resources through the peptide encyclopedia on the R&D Peptides research hub.
Frequently Asked Questions
What does GHK-Cu stand for?
GHK-Cu refers to the tripeptide glycyl-L-histidyl-L-lysine bound to a copper (II) ion. The abbreviation GHK derives from the single-letter amino acid codes for glycine (G), histidine (H), and lysine (K).
Is GHK-Cu the same as a copper peptide?
GHK-Cu is one of the most extensively studied copper peptide compounds in the scientific literature. The term “copper peptide” broadly refers to any peptide that chelates copper ions, but in research contexts, GHK-Cu is typically the compound referenced when discussing the ghk-cu copper peptide specifically.
Where can researchers access GHK-Cu?
GHK-Cu is available as a research compound through specialist peptide suppliers. Qualified researchers can review available compounds via the full product portfolio.
Is GHK-Cu the same as GHK?
No. GHK refers to the tripeptide alone, while GHK-Cu denotes the chelated complex of GHK bound to a copper (II) ion. The two forms exhibit different biochemical properties and are treated as distinct compounds in the research literature.
What type of research is GHK-Cu most commonly used for?
In published literature, GHK-Cu most frequently appears in studies relating to gene expression modulation, extracellular matrix biology, wound contraction models, and antioxidant pathway investigation. It is considered a research compound with a broad investigative profile.
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