TL;DR
- What it is
- GHK-Cu (glycyl-L-histidyl-L-lysine copper peptide) is a naturally occurring tripeptide that chelates copper(II). Researchers use it to study gene expression, extracellular matrix (ECM) remodeling, and fibroblast signaling in controlled laboratory settings.
- Who researches it
- Dermatology, regenerative biology, and peptide chemistry laboratories employ GHK-Cu in cell culture and in vivo models to probe collagen synthesis, angiogenesis, and inflammatory pathways.
- Key takeaway
- GHK-Cu is among the most cited copper peptides in peer-reviewed literature, with reproducible in vitro effects on fibroblast activity and matrix metalloproteinase (MMP) regulation; laboratory use requires cold storage, sterile reconstitution, and research-only protocols.
Overview
GHK-Cu was first characterized in human plasma and later synthesized for reproducible laboratory supply. The GHK sequence binds Cu²⁺ with high affinity, forming a stable complex that modulates signaling linked to tissue repair and ECM homeostasis in research models. Typical research presentations include lyophilized powder (1–50 mg vials) reconstituted in bacteriostatic water or sterile buffer immediately before use.
Mechanism of action
In cell-based assays, GHK-Cu has been reported to upregulate collagen types I and III, elastin, and glycosaminoglycan synthesis while downregulating certain MMPs that degrade ECM components. Copper delivery via the peptide may influence superoxide dismutase (SOD) activity and oxidative stress pathways. Gene-expression profiling studies suggest broad effects on repair-associated transcripts, though mechanisms vary by cell type, concentration, and exposure duration.
Research context
Published work spans dermal fibroblast cultures, wound-healing models, and hair-follicle biology. Common laboratory concentration ranges cited in literature fall between 1–10 µM in media, with peptide mass often expressed as 1–5 mg per reconstitution vial for injection or topical application in animal studies—not for human use.
- Peptide class: Copper-binding tripeptide (GHK sequence)
- Typical research form: Lyophilized powder, ≥98% purity (HPLC)
- Storage: −20 °C lyophilized; reconstituted aliquots often stored at 2–8 °C for short periods
- Administration in models: Subcutaneous injection, topical gel, or culture media supplementation per protocol
- Half-life: Rapid proteolytic cleavage in vivo; local depot or repeated dosing common in animal studies
Practical considerations for researchers
Order peptide from suppliers that provide batch-specific COA, endotoxin screening where applicable, and tamper-evident packaging. Reconstitute with sterile technique; avoid repeated freeze–thaw of working solutions. Document lot numbers in lab notebooks for reproducibility. GHK-Cu is light-sensitive—minimize exposure during handling. Always label materials for research use only and segregate from any consumable inventory.
Related research compounds
Laboratories studying ECM and repair biology often compare GHK-Cu with BPC-157, TB-500 (Thymosin Beta-4 fragment), and Epitalon in parallel signaling assays. Copper-free GHK and alternative copper peptides (e.g., AHK-Cu) serve as methodological controls in binding and activity studies.
Frequently asked questions
What is GHK-Cu used for in research?
Researchers use GHK-Cu to investigate copper-dependent signaling in fibroblasts, ECM production, angiogenesis, and inflammatory modulation. It is a model compound for studying peptide-mediated tissue remodeling—not a validated drug or cosmetic ingredient in regulated human applications.
How should GHK-Cu be stored in the lab?
Store lyophilized peptide at −20 °C in a desiccated environment. After reconstitution with bacteriostatic water or sterile buffer, use promptly or aliquot and refrigerate at 2–8 °C for limited duration per your SOP. Protect from light and moisture during handling.
What concentrations appear in published cell studies?
Many in vitro papers report 0.1–10 µM GHK-Cu in culture media, with dose–response curves varying by cell line. Animal studies may use microgram-to-milligram per kilogram dosing depending on route; always cross-reference primary literature for your model system.
How does GHK-Cu differ from copper salts alone?
The tripeptide chelates and delivers copper in a peptide-bound form, which may alter uptake kinetics and downstream gene effects compared with free Cu²⁺ salts. Control experiments often include copper-only and peptide-only arms to isolate complex-specific activity.
Where can laboratories source research-grade GHK-Cu?
Specialty peptide suppliers such as Catalyst Research Labs provide research-grade GHK-Cu with documented purity and batch COA. Verify identity by mass spectrometry or HPLC in your QC workflow before experimental use.
For laboratory and research use only. Not for human consumption. Products are not intended to diagnose, treat, cure, or prevent any disease. Catalyst Research Labs LLC — Sheridan, WY.