title: Allelic variation of serotonin transporter expression is associated with depression in Parkinson's disease.
abstract: Idiopathic Parkinson's disease (PD) is a common neurodegenerative disorder with prominent motor symptoms. However, depression is common in PD, affecting about 40% of PD patients. Since there is extensive evidence of degeneration of serotonin (5HT) neurons and loss of the 5HT transporter (5HTT) in PD, we assessed whether a functional polymorphism in the promoter of the 5HTT gene (5HTT gene-linked polymorphic region, 5HTTLPR), which determines high or low 5HT uptake, is associated with depressive symptomatology in PD patients. We found that patients with the short allele of the 5HTTLPR had significantly higher scores on the Hamilton Depression Scale. A functional promoter polymorphism of the monoamine oxidase A (MAOA) gene showed no association. Thus, the 5HTTLPR but not the MAOA gene promoter-associated polymorphism may be a risk factor for depression in PD patients, while neither polymorphism increases the risk for development of Parkinson's disease itself.
authors.affiliation: Department of Psychiatry, University of Würzburg, Würzburg, Germany.
authors.forename: R
authors.initials: R
authors.lastname: Mössner
authors.forename: A
authors.initials: A
authors.lastname: Henneberg
authors.forename: A
authors.initials: A
authors.lastname: Schmitt
authors.forename: Y V
authors.initials: YV
authors.lastname: Syagailo
authors.forename: M
authors.initials: M
authors.lastname: Grässle
authors.forename: T
authors.initials: T
authors.lastname: Hennig
authors.forename: R
authors.initials: R
authors.lastname: Simantov
authors.forename: M
authors.initials: M
authors.lastname: Gerlach
authors.forename: P
authors.initials: P
authors.lastname: Riederer
authors.forename: K P
authors.initials: KP
authors.lastname: Lesch
mesh_terms: D000483:Alleles; D002352:Carrier Proteins / Q000235:genetics*; D003863:Depression / Q000235:genetics*; D005260:Female; D015870:Gene Expression; D014644:Genetic Variation; D006801:Humans; D008297:Male; D008562:Membrane Glycoproteins / Q000235:genetics*; D026901:Membrane Transport Proteins; D008995:Monoamine Oxidase / Q000235:genetics; D009419:Nerve Tissue Proteins; D010300:Parkinson Disease / Q000235:genetics* / Q000523:psychology; D011110:Polymorphism, Genetic; D011401:Promoter Regions, Genetic / Q000235:genetics; D050486:Serotonin Plasma Membrane Transport Proteins
chemical_list: D002352:Carrier Proteins; D008562:Membrane Glycoproteins; D026901:Membrane Transport Proteins; D009419:Nerve Tissue Proteins; C493230:SLC6A4 protein, human; D050486:Serotonin Plasma Membrane Transport Proteins; D008995:Monoamine Oxidase