The same reaction can occur on protein cysteine, and the formed GSNO group functions as important intermediate in NO metabolism, a critical player in fulfilling the biolgogical function of NO in signal transduction ( S -glutathionylation (Zeng et al., 2001) or thanks to catalytic activity of GGT generate S-nitrosocysteinylglycine that in turn can be cleaved by a membrane dipeptidase thus forming S -nitrosocysteine (S-NO)
human clinical trials are rare and preliminary
Vitamin C serum discontinuation provides another relevant comparison since L-ascorbic acid represents popular antioxidant treatment with collagen synthesis stimulation and skin brightening effects partially overlapping GHK-Cu benefits
If the answer is "topical only" and the molecule is GHK-Cu, expect surface hydration changes and not much else
sgRNA constructs and gene expressing codon optimized (OPT) plasmid constructs sgRNA control and constructs against CBS and L2HGDH were designed targeting GTATTACTGATATTGGTGGG (sgControl) (#230080, Addgene), GGAGCAGACAACCTACGAGG (sg CBS -1) (#230081, Addgene), TGGCAGTGCTGGCAGCACGG (sg CBS -2) (#230082, Addgene), GATATAGTCATCGTTGGTGG (sg L2HGDH -1) (#230083, Addgene), and CACCAGACTGGACATAACAG (sg L2HGDH -2) (#230084, Addgene) and constructed in lentiCRISPR v2-Blast (#83480, Addgene) for Blasticidin selection at a final concentration of 5 g/ml
Curr Pharm Des 20(7): 11211125