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Title: Analysis of Parkinson disease patients from Portugal for mutations in SNCA, PRKN, PINK1 and LRRK2
Authors: Brás, José 
Guerreiro, Rita 
Ribeiro, Maria 
Morgadinho, Ana 
Januário, Cristina 
Dias, Margarida 
Calado, Ana 
Semedo, Cristina 
Oliveira, Catarina 
Hardy, John 
Singleton, Andrew 
Issue Date: 2008
Publisher: BioMedCentral
Citation: BMC Neurology. 8 (2008)
Abstract: Background: Mutations in the genes PRKN and LRRK2 are the most frequent known genetic lesions among Parkinson's disease patients. We have previously reported that in the Portuguese population the LRRK2 c.6055G > A; p.G2019S mutation has one of the highest frequencies in Europe. Methods: Here, we follow up on those results, screening not only LRRK2, but also PRKN, SNCA and PINK1 in a cohort of early-onset and late-onset familial Portuguese Parkinson disease patients. This series comprises 66 patients selected from a consecutive series of 132 patients. This selection was made in order to include only early onset patients (age at onset below 50 years) or late-onset patients with a positive family history (at least one affected relative). All genes were sequenced bidirectionally, and, additionally, SNCA, PRKN and PINK1 were subjected to gene dosage analysis. Results: We found mutations both in LRRK2 and PRKN, while the remaining genes yielded no mutations. Seven of the studied patients showed pathogenic mutations, in homozygosity or compound heterozygosity for PRKN, and heterozygosity for LRRK2. Conclusion: Mutations are common in Portuguese patients with Parkinson's disease, and these results clearly have implications not only for the genetic diagnosis, but also for the genetic counseling of these patients.
ISSN: 1471-2377
DOI: 10.1186/1471-2377-8-1
Rights: openAccess
Appears in Collections:FMUC Medicina - Artigos em Revistas Internacionais

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