GHK-Cu: Gene Expression Resetting, Collagen Remodeling & Copper Delivery

1. Discovery & Broad Genomic Impact

Isolated in 1973 from human plasma by Dr. Loren Pickart, GHK (glycyl-L-histidyl-L-lysine) naturally declines with age—dropping from an average concentration of $200 \, \text{ng/mL}$ at age 20 to approximately $80 \, \text{ng/mL}$ by age 60.

Broad-scale genomic profiling using the Broad Institute's Connectivity Map revealed that GHK modulates the expression of over 4,192 human genes, shifting gene expression profiles toward a younger, more resilient cellular phenotype.

2. Extracellular Matrix (ECM) Synthesis

GHK-Cu is particularly renowned for its multifaceted coordination of connective tissue regeneration:

• Collagen & Elastin Stimulation: Stimulates both Type I and Type III collagen production in human dermal and connective fibroblasts.
• Glycosaminoglycan (GAG) Production: Increases synthesis of hyaluronic acid, chondroitin sulfate, and dermatan sulfate.
• Decorin Upregulation: Enhances the small leucine-rich proteoglycan decorin, which prevents abnormal scar formation (keloids) and ensures parallel collagen fibril alignment.
• Balanced MMP/TIMP Modulation: Upregulates matrix metalloproteinases (MMP-1, MMP-2) while regulating tissue inhibitors of metalloproteinases (TIMP-1) to break down damaged, cross-linked proteins.