The effect of tripeptide-copper complex on human hair growth in vitro.
In ex vivo human hair follicles and cultured human dermal papilla cells, AHK-Cu (10^-12 to 10^-9 M) stimulated follicle elongation and DPC proliferation and altered apoptosis-related proteins (increased Bcl-2/Bax, decreased cleaved caspase-3 and PARP), though a direct apoptosis assay showed a non-significant reduction in apoptotic cells; results are preclinical and limited by incomplete reporting in the abstract.