title: Association between 5-hydroxytryptamine 2A receptor gene polymorphism and postoperative analgesic requirements after major abdominal surgery.
abstract: Although the serotonin (5-hydroxytryptamine (5-HT)) 2A receptor has been reported to be associated with pain, no relationship has been found between single nucleotide polymorphisms in the 5-HT2A receptor gene and analgesic requirements. To clarify the mechanism of individual differences in analgesic requirements, we investigated the relationship between the 5-HT2A 102T/C gene polymorphism and analgesic requirements in 135 patients who underwent major open abdominal surgery and were managed with continuous epidural analgesia with opioids after surgery. Genotyping was performed using polymerase chain reaction-restriction fragment length polymorphism. We found that the 102T/C polymorphism had significant main effects with regard to analgesic requirements. In addition, significant interaction effects were found between the 102T/C polymorphism and sex in terms of analgesic requirements. Among female subjects, patients with the T/T genotype of the 102T/C polymorphism had more analgesic requirements than those with the other genotypes. This finding suggests that the linkage disequilibrium block, which includes the 102T/C polymorphism of the 5-HT2A receptor gene, is involved in individual differences in analgesic requirements in women.
authors.affiliation: Laboratory of Neurophysiology, Graduate School of Environmental Health Sciences, Azabu University, Kanagawa, Japan.
authors.forename: Jun
authors.initials: J
authors.lastname: Aoki
authors.forename: Masakazu
authors.initials: M
authors.lastname: Hayashida
authors.forename: Megumi
authors.initials: M
authors.lastname: Tagami
authors.forename: Makoto
authors.initials: M
authors.lastname: Nagashima
authors.forename: Ken-ichi
authors.initials: K
authors.lastname: Fukuda
authors.forename: Daisuke
authors.initials: D
authors.lastname: Nishizawa
authors.forename: Yasukazu
authors.initials: Y
authors.lastname: Ogai
authors.forename: Shinya
authors.initials: S
authors.lastname: Kasai
authors.forename: Kazutaka
authors.initials: K
authors.lastname: Ikeda
authors.forename: Kazuhiko
authors.initials: K
authors.lastname: Iwahashi
mesh_terms: D000005:Abdomen / Q000601:surgery*; D000368:Aged; D018712:Analgesics, Non-Narcotic / Q000627:therapeutic use; D000701:Analgesics, Opioid / Q000627:therapeutic use; D000767:Anesthesia, Epidural; D005260:Female; D056726:Genetic Association Studies; D005838:Genotype; D006801:Humans; D015810:Linkage Disequilibrium; D008297:Male; D008875:Middle Aged; D010149:Postoperative Pain / Q000188:drug therapy* / Q000209:etiology / Q000235:genetics*; D016133:Polymerase Chain Reaction; D012150:Polymorphism, Restriction Fragment Length; D020641:Polymorphism, Single Nucleotide; D011182:Postoperative Care; D044402:Receptor, Serotonin, 5-HT2A / Q000235:genetics*; D012737:Sex Factors
chemical_list: D018712:Analgesics, Non-Narcotic; D000701:Analgesics, Opioid; D044402:Receptor, Serotonin, 5-HT2A