title: [Genetic background of chronic fatigue syndrome].
abstract: Although previous twin and family studies have suggested the involvement of genetic factor(s) in the pathogenesis of chronic fatigue syndrome (CFS), responsible gene for CFS was not known. We have recently reported the association of serotonin transporter gene polymorphism in CFS. A significant increase of longer (L and XL) alleic variants was found in the CFS patients compared to the controls. Compared to S allele, the L allele is believed to retain higher transcriptional activity, which causes decreased concentration of serotonin in the extracellular space, namely, active serotonin in CFS. These results thus support the serotonin hypothesis in the pathogenesis of CFS.
authors.affiliation: 'Graduate School of Medicine, Mie University.
authors.forename: Masaaki
authors.initials: M
authors.lastname: Narita
authors.forename: Naoko
authors.initials: N
authors.lastname: Narita
mesh_terms: D005110:Extracellular Space / Q000378:metabolism; D015673:Fatigue Syndrome, Chronic / Q000235:genetics*; D006801:Humans; D011110:Polymorphism, Genetic; D044402:Receptor, Serotonin, 5-HT2A / Q000235:genetics; D012701:Serotonin / Q000378:metabolism; D050486:Serotonin Plasma Membrane Transport Proteins / Q000235:genetics*
chemical_list: D044402:Receptor, Serotonin, 5-HT2A; D050486:Serotonin Plasma Membrane Transport Proteins; D012701:Serotonin