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. 2018 Jul 7;19(7):1987. doi: 10.3390/ijms19071987

Table 4.

GHK and Genes Associated with Pain [30].

Gene Abbreviation, Name (GENE Database) Percent Change Comment (GENE Database)
ORPM1, opioid receptor mu 1 +1294 the principal target of endogenous opioid peptides such as beta-endorphin and enkephalins.
CCKAR, cholecystokinin A receptor +190 regulates satiety and the release of beta-endorphin and dopamine.
CNR1, cannabinoid receptor 1 +172 involved in the cannabinoid-induced CNS effects
SIGMAR1, sigma non-opioid intracellular receptor 1 +155 a receptor protein that interacts with a variety of psychotomimetic drugs, including cocaine and amphetamines.
PNOC, prepronociceptin +150 A receptor for proteins involved in regulation of pain sensitivity
OXT, oxytocin/neurophysin I prepropeptide +136 A precursor protein for oxytocin
GRIA3, glutamate ionotropic receptor AMPA type subunit 3 −126 Glutamate receptors are the predominant excitatory neurotransmitter receptors in the mammalian brain
OPRK1, opioid receptor kappa 1 −119 a receptor for various synthetic opioids