title: [Frequency of the IVS4+66A-G polymorphism in the alpha-synuclein gene in patients with Parkinson's disease in north-western Mexico].
abstract: BACKGROUND
  Parkinson disease (PD) is the second most common neurodegenerative disease of adult onset. Is a progressive movement disorder including tremor, bradykinesia, rigidity and postural instability, with an age onset between 43 and 66 years. Histopathologically, is characterized by a severe loss of dopaminergic neurons in the substantia nigra and inclusions consisting of insoluble protein aggregates called Lewy bodies, this are comprised in part of alpha-synuclein. The etiology of PD is still not fully understood, but genetic analyses, epidemiologic studies and experimental models of PD are providing important new insights into the pathogenesis of PD.
  
  
  OBJECTIVE
  To determine allelic and genotypic frequencies of polymorphism IVS4+66A-G in the alpha-synuclein gene and to demonstrate its association with PD in northwest Mexican population.
  
  
  METHODS
  Genomic desoxyribonucleic acid (DNA) from 51 PD patients and 121 persons without PD were achieved by polymerase chain reaction and analyzed the allelic and genotypic distribution in IVS4+66A-G polymorphism of alpha-synuclein gene.
  
  
  RESULTS
  The genotypic frequency of IVS4+66AA was 43.1% in PD patients and 38.8% in control group; IVS4+66GG was 2% in PD patients and 4.1% in control group, whereas 54.9% in PD patients and 57.1% in control group were heterozygous. Statistical differences were not observed between groups (p<0.05).
  
  
  CONCLUSIONS
  Association was not observed between the IVS4+66A-G polymorphism and PD.
authors.affiliation: Laboratorio de Genética Molecular, División de Medicina Molecular, CIBO-IMSS, Jalisco, México.
authors.forename: L J
authors.initials: LJ
authors.lastname: Ramírez-Jirano
authors.forename: J L
authors.initials: JL
authors.lastname: Ruiz-Sandoval
authors.forename: F J
authors.initials: FJ
authors.lastname: Jiménez-Gil
authors.forename: J
authors.initials: J
authors.lastname: Ramírez-Vega
authors.forename: E
authors.initials: E
authors.lastname: Vargas-Frutos
authors.forename: M P
authors.initials: MP
authors.lastname: Gallegos-Arreola
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D016022:Case-Control Studies; D006801:Humans; D008800:Mexico; D008875:Middle Aged; D010300:Parkinson Disease / Q000235:genetics*; D011110:Polymorphism, Genetic; D051844:alpha-Synuclein / Q000235:genetics*
chemical_list: D051844:alpha-Synuclein