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Its production relies on the neurotransmitter norepinephrine and requires serotonin as precursor, monoamines linked to depression

doi: 10.1126/science.aaa2630 146 DunphyGFlannerySMAlmineJFConnollyDJPaulusCJnssonKLet al

Br J Pharmacol (2008) 153:620

Lipinska et al., 2025), EVs have been applied using heterogeneous experimental protocols, with doses generally ranging from low g/mL concentrations (310 g/mL) to higher fixed doses around 120200 g/mL, and exposure times spanning from short co-culture periods of a few hours (up to 14 h) to prolonged treatments covering complete in vitro maturation windows according to the specie (approximately 1838 h)

Gene Expression Modulation: Research indicates GHK-Cu influences over 4,000 genes