Study of the allelic variants CYP2C9*2 and CYP2C9*3 in samples of the Peruvian mestizo population

Ángel Tito Alvarado, Ana María Muñoz, Berta Loja, Jessica Michiko Miyasato, Jorge Antonio García, Roberto Andrés Cerro, Luis Abel Quiñones, Nelson Miguel Varela, .

Keywords: Cytochrome P-450 CYP2C9, genotype, pharmacogenetics, Perú

Abstract

Introduction: CYP2C9 metabolizes approximately 15% of the prescribed drugs. Its gene has alleles whose frequencies differ between ethnic groups and populations. The alleles CYP2C9*2 and CYP2C9*3 account for an enzyme with decreased activity and their frequencies have not been determined in the Peruvian mestizo population.
Objective: To characterize the frequencies of the allelic variants *2 (rs1799853) and *3 (rs1057910) of CYP2C9 gen in the Peruvian mestizo population from Lima, Tacna y Junín.
Materials and methods: We conducted an observational, prospective cross-sectional study with non-probabilistic, by convenience, and incidental sampling. We included 218 subjects according to the inclusion and exclusion criteria, all of whom had signed the informed consent. We obtained the genomic DNA from oral mucosa swab. For the detection of the CYP2C9*2 and CYP2C9*3 genotypes, we used real-time-polymerase chain reaction with TaqMan® probes.
Results: The genotyping revealed that CYP2C9*2 and CYP2C9*3 variants have low frequencies (0.046 and 0.062, respectively). The frequency of intermediate metabolizers was 15.13% (CYP2C9*1/*2: 5.96%; CYP2C9*1/*3: 9.17%) and that of slow metabolizers was 3.22% (CYP2C9*2/*2: 1.38%; CYP2C9*3/*3: 1.38%; CYP2C9*2/*3: 0.46%).
Conclusions: It was possible to determine the genotypic and allelic frequencies for the variants *2 and *3 of the CYP2C9 gene in a non-probabilistic sample of the Peruvian mestizo population. The frequencies obtained (0.046 and 0.062, respectively) corresponded to those expected for a South American mestizo population with Amerindian, European, African and Asian ancestry.

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  • Ángel Tito Alvarado Departamento de Biología y Química, Facultad de Ingeniería, Universidad San Ignacio de Loyola (USIL), Lima, Perú https://orcid.org/0000-0001-8694-8924
  • Ana María Muñoz Departamento de Biología y Química, Facultad de Ingeniería, Universidad San Ignacio de Loyola (USIL), Lima, Perú
  • Berta Loja Departamento de Biología y Química, Facultad de Ingeniería, Universidad San Ignacio de Loyola (USIL), Lima, Perú
  • Jessica Michiko Miyasato Clínica Médica Master Medic ERS, Lima, Perú https://orcid.org/0000-0003-2422-0617
  • Jorge Antonio García Facultad de Farmacia y Bioquímica, Universidad Nacional San Luis Gonzaga, Ica, Perú
  • Roberto Andrés Cerro Laboratorio de Carcinogénesis Química y Farmacogenética, Departamento de Oncología Básico-Clínico, Facultad de Medicina, Universidad de Chile, Santiago, Chile
  • Luis Abel Quiñones Laboratorio de Carcinogénesis Química y Farmacogenética, Departamento de Oncología Básico-Clínico, Facultad de Medicina, Universidad de Chile, Santiago, Chile
  • Nelson Miguel Varela Laboratorio de Carcinogénesis Química y Farmacogenética, Departamento de Oncología Básico-Clínico, Facultad de Medicina, Universidad de Chile, Santiago, Chile

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How to Cite
1.
Alvarado Ángel T, Muñoz AM, Loja B, Miyasato JM, García JA, Cerro RA, et al. Study of the allelic variants CYP2C9*2 and CYP2C9*3 in samples of the Peruvian mestizo population. biomedica [Internet]. 2019 Sep. 1 [cited 2024 May 17];39(3):601-10. Available from: https://revistabiomedica.org/index.php/biomedica/article/view/4636

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Published
2019-09-01
Section
Short communication

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