Relevance of NR1I2 variants on carbamazepine therapy in Mexican Mestizos with epilepsy at a tertiary-care hospital

Author:

Fricke-Galindo Ingrid1ORCID,Jung-Cook Helgi23ORCID,Martínez-Juárez Iris E2ORCID,Monroy-Jaramillo Nancy2ORCID,Ortega-Vázquez Alberto1ORCID,Rojas-Tomé Irma S2,Dorado Pedro45ORCID,Peñas-Lledó Eva46ORCID,Llerena Adrián467ORCID,López-López Marisol1ORCID

Affiliation:

1. Metropolitan Autonomous University, Campus Xochimilco, Calzada del Hueso 1100, Villa Quietud, 04960, Coyoacán, Mexico City, Mexico

2. National Institute of Neurology & Neurosurgery, Manuel Velasco Suárez, Insurgentes Sur 3877, La Fama, 14269, Tlalpan, Mexico City, Mexico

3. National Autonomous University of Mexico, Mexico City, Mexico, Av. Universidad 3000, C.U., 04510, Coyoacán, Mexico City, Mexico

4. Biosanitary Research Institute, INUBE Extremadura University, Avda. de Elvas, Badajoz, 06006, Spain

5. Department of Medical-Surgery Therapeutics, University of Extremadura, Avda. Virgen del Puerto, Plasencia, 10600, Spain

6. Faculty of Medicine, University of Extremadura, Av. de Elvas, s/n, Badajoz, 06006, Spain

7. CICAB Clinical Research Center, Extremadura University Hospital, Campus Universitario, Av. de Elvas, s/n, Badajoz, 06080, Spain

Abstract

Aim: We evaluated the potential influence of genetic ( CYP3A5, EPHX1, NR1I2, HNF4A, ABCC2, RALBP1, SCN1A, SCN2A and GABRA1) and nongenetic factors on carbamazepine (CBZ) response, adverse drug reactions and CBZ plasma concentrations in 126 Mexican Mestizos (MM) with epilepsy. Subjects & methods: Patients were genotyped for 27 variants using TaqMan® assays. Results: CBZ response was associated with NR1I2 variants and lamotrigine cotreatment. CBZ-induced adverse drug reactions were related to antiepileptic polytherapy and SCN1A rs2298771/rs3812718 haplotype. CBZ plasma concentrations were influenced by NR1I2-rs2276707 and -rs3814058, and by phenytoin cotreatment. CBZ daily dose was also influenced by NR1I2-rs3814055 and EPHX1-rs1051740. Conclusion: Interindividual variability in CBZ treatment was partly explained by NR1I2, EPHX1 and SCN1A variants, as well as antiepileptic cotreatment in MM with epilepsy.

Funder

Consejo Nacional de Ciencia y Tecnología

Publisher

Future Medicine Ltd

Subject

Pharmacology,Genetics,Molecular Medicine

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