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Influence of genetic, biological and pharmacological factors on levodopa dose in Parkinson's disease

    Vivian Altmann

    Departamento de Genética, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil

    ,
    Artur F Schumacher-Schuh

    Serviço de Neurologia, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil

    ,
    Mariana Rieck

    Departamento de Genética, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil

    ,
    Sidia M Callegari-Jacques

    Departamento de Estatística, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil

    ,
    Carlos RM Rieder

    Serviço de Neurologia, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil

    &
    Mara H Hutz

    *Author for correspondence:

    E-mail Address: mara.hutz@ufrgs.br

    Departamento de Genética, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil

    Published Online:https://doi.org/10.2217/pgs.15.183

    Aim: Levodopa is first-line treatment of Parkinson's disease motor symptoms but, dose response is highly variable. Therefore, the aim of this study was to determine how much levodopa dose could be explained by biological, pharmacological and genetic factors. Patients & methods: A total of 224 Parkinson's disease patients were genotyped for SV2C and SLC6A3 polymorphisms by allelic discrimination assays. Comedication, demographic and clinical data were also assessed. Results: All variables with p < 0.20 were included in a multiple regression analysis for dose prediction. The final model explained 23% of dose variation (F = 11.54; p < 0.000001). Conclusion: Although a good prediction model was obtained, it still needs to be tested in an independent sample to be validated.

    Papers of special note have been highlighted as: • of interest; •• of considerable interest

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