The distribution and risk effect of GBA variants in a large cohort of PD patients from Colombia and Peru

Carlos Velez-Pardo, Oswaldo Lorenzo-Betancor, Marlene Jimenez-Del-Rio, Sonia Moreno, Francisco Lopera, Mario Cornejo-Olivas, Luis Torres, Miguel Inca-Martinez, Pilar Mazzetti, Carlos Cosentino, Dora Yearout, Sarah M. Waldherr, Cyrus P. Zabetian, Ignacio F. Mata

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

© 2019 Elsevier Ltd Background: Mutations in the glucocerebrosidase (GBA) gene are an important risk factor for Parkinson's disease (PD). However, most GBA genetic studies in PD have been performed in patients of European origin and very few data are available in other populations. Methods: We sequenced the entire GBA coding region in 602 PD patients and 319 controls from Colombia and Peru enrolled as part of the Latin American Research Consortium on the Genetics of Parkinson's disease (LARGE-PD). Results: We observed a significantly higher proportion of GBA mutation carriers in patients compared to healthy controls (5.5% vs 1.6%; OR = 4.3, p = 0.004). Interestingly, the frequency of mutations in Colombian patients (9.9%) was more than two-fold greater than in Peruvian patients (4.2%) and other European-derived populations reported in the literature (4–5%). This was primarily due to the presence of a population-specific mutation (p.K198E) found only in the Colombian cohort. We also observed that the age at onset was significantly earlier in GBA carriers when compared to non-carriers (47.1 ± 14.2 y vs. 55.9 ± 14.2 y; p = 0.0004). Conclusion: These findings suggest that GBA mutations are strongly associated with PD risk and earlier age at onset in Peru and Colombia. The high frequency of GBA carriers among Colombian PD patients (∼10%) makes this population especially well-suited for novel therapeutic approaches that target GBA-related PD.
Original languageAmerican English
Pages (from-to)204-208
Number of pages5
JournalParkinsonism and Related Disorders
DOIs
StatePublished - 1 Jun 2019

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