title: The G2019S LRRK2 mutation is rare in Korean patients with Parkinson's disease.
abstract: BACKGROUND
  A number of causative mutations such as alpha-synuclein, parkin, UCHL1, Pink-1, DJ-1 have been identified in Parkinson's disease (PD). They are usually found in the familial cases. One mutation of great interest is the G2019S mutation in the LRRK2 gene, which has been reported in both familial and sporadic PD. Its prevalence has been reported to vary markedly among different races. We examined the prevalence of the G2019S mutation in the Korean PD population for genetic study planning.
  
  
  METHODS
  We conducted a genetic analysis of the G2019S mutation by standard PCR and restriction digestion method. 453 PD patients were studied, 34% of whom had an age at onset of < 50 years and 3.8% had a positive family history.
  
  
  RESULTS
  None of the 453 study subjects carried the G2019S mutation.
  
  
  CONCLUSIONS
  Our result confirms previous reports that the G2019S mutation is rare among PD patients in the Asian population. This result supports the notion that the prevalence of this LRRK2 mutation is population specific, and that there may be a founder effect within western populations.
authors.affiliation: Department of Neurology, BK-21 and MRC, College of Medicine, Seoul National University, South Korea.
authors.forename: Jin-Whan
authors.initials: JW
authors.lastname: Cho
authors.forename: Sung-Yeon
authors.initials: SY
authors.lastname: Kim
authors.forename: Sung-Sup
authors.initials: SS
authors.lastname: Park
authors.forename: Han-Jun
authors.initials: HJ
authors.lastname: Kim
authors.forename: Tae-Beom
authors.initials: TB
authors.lastname: Ahn
authors.forename: Jong-Min
authors.initials: JM
authors.lastname: Kim
authors.forename: Beom-Seok
authors.initials: BS
authors.lastname: Jeon
mesh_terms: D000328:Adult; D017668:Age of Onset; D000368:Aged; D044466:Asian People / Q000235:genetics; D004252:DNA Mutational Analysis; D005260:Female; D018703:Founder Effect; D005787:Gene Frequency; D005819:Genetic Markers / Q000235:genetics; D020022:Genetic Predisposition to Disease / Q000235:genetics*; D005820:Genetic Testing; D005838:Genotype; D006579:Heterozygote; D006801:Humans; D007723:Korea; D000071158:Leucine-Rich Repeat Serine-Threonine Protein Kinase-2; D008297:Male; D008875:Middle Aged; D009154:Mutation / Q000235:genetics*; D010300:Parkinson Disease / Q000235:genetics* / Q000378:metabolism / Q000503:physiopathology; D017346:Protein Serine-Threonine Kinases / Q000235:genetics*
chemical_list: D005819:Genetic Markers; C495280:LRRK2 protein, human; D000071158:Leucine-Rich Repeat Serine-Threonine Protein Kinase-2; D017346:Protein Serine-Threonine Kinases