Volume 28, Issue 2 pp. 459-468
Original Article

Integrating genetic and clinical data to predict impulse control disorders in Parkinson's disease

S. Jesús

S. Jesús

Movement Disorders Unit, Department of Neurology and Clinical Neurophysiology/Institute of Biomedicine of Seville, University Hospital Virgen del Rocío/CSIC/University of Seville, Seville, Spain

Network Center for Biomedical Research in Neurodegenerative Diseases (CIBERNED), Madrid, Spain

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M. T. Periñán

M. T. Periñán

Movement Disorders Unit, Department of Neurology and Clinical Neurophysiology/Institute of Biomedicine of Seville, University Hospital Virgen del Rocío/CSIC/University of Seville, Seville, Spain

Network Center for Biomedical Research in Neurodegenerative Diseases (CIBERNED), Madrid, Spain

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C. Cortés

C. Cortés

Movement Disorders Unit, Department of Neurology and Clinical Neurophysiology/Institute of Biomedicine of Seville, University Hospital Virgen del Rocío/CSIC/University of Seville, Seville, Spain

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D. Buiza-Rueda

D. Buiza-Rueda

Movement Disorders Unit, Department of Neurology and Clinical Neurophysiology/Institute of Biomedicine of Seville, University Hospital Virgen del Rocío/CSIC/University of Seville, Seville, Spain

Network Center for Biomedical Research in Neurodegenerative Diseases (CIBERNED), Madrid, Spain

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D. Macías-García

D. Macías-García

Movement Disorders Unit, Department of Neurology and Clinical Neurophysiology/Institute of Biomedicine of Seville, University Hospital Virgen del Rocío/CSIC/University of Seville, Seville, Spain

Network Center for Biomedical Research in Neurodegenerative Diseases (CIBERNED), Madrid, Spain

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A. Adarmes

A. Adarmes

Movement Disorders Unit, Department of Neurology and Clinical Neurophysiology/Institute of Biomedicine of Seville, University Hospital Virgen del Rocío/CSIC/University of Seville, Seville, Spain

Network Center for Biomedical Research in Neurodegenerative Diseases (CIBERNED), Madrid, Spain

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L. Muñoz-Delgado

L. Muñoz-Delgado

Movement Disorders Unit, Department of Neurology and Clinical Neurophysiology/Institute of Biomedicine of Seville, University Hospital Virgen del Rocío/CSIC/University of Seville, Seville, Spain

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M. Á. Labrador-Espinosa

M. Á. Labrador-Espinosa

Movement Disorders Unit, Department of Neurology and Clinical Neurophysiology/Institute of Biomedicine of Seville, University Hospital Virgen del Rocío/CSIC/University of Seville, Seville, Spain

Network Center for Biomedical Research in Neurodegenerative Diseases (CIBERNED), Madrid, Spain

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C. Tejera-Parrado

C. Tejera-Parrado

Movement Disorders Unit, Department of Neurology and Clinical Neurophysiology/Institute of Biomedicine of Seville, University Hospital Virgen del Rocío/CSIC/University of Seville, Seville, Spain

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M. P. Gómez-Garre

Corresponding Author

M. P. Gómez-Garre

Movement Disorders Unit, Department of Neurology and Clinical Neurophysiology/Institute of Biomedicine of Seville, University Hospital Virgen del Rocío/CSIC/University of Seville, Seville, Spain

Network Center for Biomedical Research in Neurodegenerative Diseases (CIBERNED), Madrid, Spain

Correspondence: P. Mir and M. P. Gómez-Garre, Unidad de Trastornos del Movimiento, Servicio de Neurología y Neurofisiología Clínica, Hospital Universitario Virgen del Rocío, Av. Manuel Siurot s/n. 41013, Seville, Spain (tel.: +34 954923039; fax: +34 955923101; e-mail: [email protected] and [email protected]).

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P. Mir

Corresponding Author

P. Mir

Movement Disorders Unit, Department of Neurology and Clinical Neurophysiology/Institute of Biomedicine of Seville, University Hospital Virgen del Rocío/CSIC/University of Seville, Seville, Spain

Network Center for Biomedical Research in Neurodegenerative Diseases (CIBERNED), Madrid, Spain

Correspondence: P. Mir and M. P. Gómez-Garre, Unidad de Trastornos del Movimiento, Servicio de Neurología y Neurofisiología Clínica, Hospital Universitario Virgen del Rocío, Av. Manuel Siurot s/n. 41013, Seville, Spain (tel.: +34 954923039; fax: +34 955923101; e-mail: [email protected] and [email protected]).

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First published: 13 October 2020
Citations: 6

Abstract

Background and purpose

Impulse control disorders (ICDs) are frequent in Parkinson’s disease (PD), with associated clinical and genetic risk factors. This study was aimed at analyzing the clinical features and the genetic background that underlie ICDs in PD.

Methods

We included 353 patients with PD in this study (58.9% men, mean age 62.4 ± 10.58 years, mean age at disease onset 52.71 ± 11.94 years). We used the validated Questionnaire for Impulsive–Compulsive Disorders in Parkinson’s Disease for ICDs screening. Motor, nonmotor, and treatment-related features were evaluated according to the presence of ICDs. Twenty-one variants related to dopaminergic, serotonergic, glutamatergic, and opioid neurotransmitter systems were assessed. Association studies between polymorphisms and ICDs were performed. The combination of clinical and genetic variables was analyzed with receiver operating characteristic curves to assess the predictability of experiencing ICDs.

Results

Impulse control disorders appeared in 25.1% of the cases. Patients with ICDs were younger and presented a higher rate of anxiety. Treatment with dopamine agonists increased the risk of ICDs and it was dose dependent (P < 0.05). Genetic association studies showed that the DOPA decarboxylase gene (DDC), rs1451375, might modulate the risk of ICDs. Plotting the clinical–genetic model, the predictability of ICDs increased 11% (area under curve = 0.80; z = 3.22, P = 0.001) when adding the genotype data for single nucleotide polymorphisms.

Conclusions

Polymorphisms in DDC might act as risk markers for ICDs in PD. The predictability of experiencing ICDs increased by adding genetic factors to clinical features. It is therefore important to assess the patient’s genetic background to identify individuals at risk for ICDs.

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