Gene | Function | Example Polymorphism(s) Associated With Pain |
Catechol-O-methyltransferase | Metabolism of catecholamines (dopamine, epinephrine, and norepinephrine) | rs4680 GG (Ernst et al, 2024)113
Val158Met (Rakvåg et al, 2008114; Diatchenko et al, 2006115) |
Neuropeptide Y | Neuropeptide implicated in pain modulation | rs16147 TT (Ernst et al, 2024)113 |
Guanosine triphosphate cyclohydrolase 1 | Rate-limiting enzyme in the synthesis of tetrahydrobiopterin (BH4) | rs998259 (minor allele T) (Kim et al, 2010)116 |
Opioid Receptor Mu 1 | Encodes for the mu opioid receptor | Asn118Asp (Lötsch et al, 2004)117 |