title: Decreased platelet glutamate  uptake and genetic risk factors in patients with Parkinson's disease.
abstract: Genetic risk factors seem to play a role in sporadic Parkinson's disease (PD), maybe triggering oxidative stress and excitotoxicity within substantia nigra. However, genetic factors act at systemic level: reduced activity of mitochondrial enzymes and decreased glutamate uptake have been shown in platelets from PD patients. In this study we investigated glutamate uptake in platelets from 38 sporadic PD patients, 13 patients with parkinsonian syndromes and 28 controls and assessed polymorphisms of alpha-synuclein and ApoE genes. A 48% reduction of glutamate uptake p)<0.0001) was observed in PD patients which, with respect to control groups, correlated with the disease severity (r = -0.44, p < 0.05). Genetic studies of this population did not show differences between PD and controls, nor correlations with platelet glutamate uptake.
authors.affiliation: Department of Neurology, S. Gerardo Hospital, University of Milano-Bicocca, Monza, Italy.
authors.forename: C
authors.initials: C
authors.lastname: Ferrarese
authors.forename: L
authors.initials: L
authors.lastname: Tremolizzo
authors.forename: M
authors.initials: M
authors.lastname: Rigoldi
authors.forename: G
authors.initials: G
authors.lastname: Sala
authors.forename: B
authors.initials: B
authors.lastname: Begni
authors.forename: L
authors.initials: L
authors.lastname: Brighina
authors.forename: G
authors.initials: G
authors.lastname: Ricci
authors.forename: M G
authors.initials: MG
authors.lastname: Albizzati
authors.forename: R
authors.initials: R
authors.lastname: Piolti
authors.forename: F
authors.initials: F
authors.lastname: Crosti
authors.forename: L
authors.initials: L
authors.lastname: Dalprà
authors.forename: L
authors.initials: L
authors.lastname: Frattola
mesh_terms: D001057:Apolipoproteins E / Q000235:genetics; D001792:Blood Platelets / Q000378:metabolism*; D001921:Brain / Q000378:metabolism* / Q000503:physiopathology; D016923:Cell Death / Q000235:genetics; D004734:Energy Metabolism / Q000235:genetics; D005787:Gene Frequency / Q000235:genetics; D005819:Genetic Markers / Q000235:genetics; D020022:Genetic Predisposition to Disease / Q000235:genetics*; D005838:Genotype; D018698:Glutamic Acid / Q000378:metabolism*; D006801:Humans; D008928:Mitochondria / Q000235:genetics / Q000378:metabolism; D009419:Nerve Tissue Proteins / Q000235:genetics; D018384:Oxidative Stress / Q000502:physiology; D010300:Parkinson Disease / Q000097:blood* / Q000235:genetics*; D011110:Polymorphism, Genetic / Q000235:genetics; D012307:Risk Factors; D051843:Synucleins; D051844:alpha-Synuclein
chemical_list: D001057:Apolipoproteins E; D005819:Genetic Markers; D009419:Nerve Tissue Proteins; C497604:SNCA protein, human; D051843:Synucleins; D051844:alpha-Synuclein; D018698:Glutamic Acid