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Piñeyro-Garza E, Gómez-Silva M, Gamino ME, Delgado-Roche L. Bioequivalence Assessment of an Oral Fixed-Dose Formulation of Dutasteride-Tamsulosin 0.5 mg/0.4 mg: A Randomized, Single-Blind, Single-Dose, 2-Period Crossover Study in Mexican Population Under Fasted Conditions. Clin Pharmacol Drug Dev 2021; 11:318-323. [PMID: 34384000 DOI: 10.1002/cpdd.1011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Accepted: 07/26/2021] [Indexed: 11/10/2022]
Abstract
The aim of the present study was to compare the bioavailability and to demonstrate the bioequivalence between a dutasteride-tamsulosin 0.5 mg/0.4 mg capsule formulation and the regulatory reference drug (Combodart®, GlaxoSmithKline). A randomized, single-blind, single-dose, 2-way crossover study under fasting conditions, with at least a 28-day washout period was carried out in healthy volunteers. Plasma concentrations of drugs were determined by high-performance liquid chromatography-tandem mass spectrometry. The pharmacokinetic analysis included maximum plasma concentration (Cmax ), area under the plasma concentration-time curve (AUC) from time 0 to 72 hours, and AUC from baseline to infinity. The test formulation was considered bioequivalent if the geometric mean ratios (test/reference) were within the predetermined range of 80% to 125%. Safety and tolerability were evaluated by clinical assessment. The confidence intervals for the log-transformed test/reference ratios for dutasteride, Cmax (95.4-109.2) and AUC from baseline to 72 hours (93.2-109.1), and for tamsulosin, Cmax (101.9-119.8), AUC from baseline to the last quantifiable concentration (91.4-106.3) and AUC from baseline to infinity (90.9-103.3), were within the allowed limit specified by the regulatory authorities (80%-125%). In addition, both test and reference drugs were safe and tolerated. These results demonstrated the bioequivalence of test product (Dakart®) compared with Combodart®.
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Affiliation(s)
| | | | - María E Gamino
- Ipharma, S.A. de C.V., Colonia Mitras Centro, Monterrey, Nuevo León, México
| | - Livan Delgado-Roche
- Laboratorios Liomont, S.A. de C.V., Colonia Cuajimalpa, Cuajimalpa de Morelos, Ciudad de México, México
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León-Cachón RBR, Bamford AD, Meester I, Barrera-Saldaña HA, Gómez-Silva M, Bustos MFG. The atorvastatin metabolic phenotype shift is influenced by interaction of drug-transporter polymorphisms in Mexican population: results of a randomized trial. Sci Rep 2020; 10:8900. [PMID: 32483134 PMCID: PMC7264171 DOI: 10.1038/s41598-020-65843-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Accepted: 05/08/2020] [Indexed: 12/18/2022] Open
Abstract
Atorvastatin (ATV) is a blood cholesterol-lowering drug used to prevent cardiovascular events, the leading cause of death worldwide. As pharmacokinetics, metabolism and response vary among individuals, we wanted to determine the most reliable metabolic ATV phenotypes and identify novel and preponderant genetic markers that affect ATV plasma levels. A controlled, randomized, crossover, single-blind, three-treatment, three-period, and six-sequence clinical study of ATV (single 80-mg oral dose) was conducted among 60 healthy Mexican men. ATV plasma levels were measured using high-performance liquid chromatography mass spectrometry. Genotyping was performed by real-time PCR with TaqMan probes. Four ATV metabolizer phenotypes were found: slow, intermediate, normal and fast. Six gene polymorphisms, SLCO1B1-rs4149056, ABCB1-rs1045642, CYP2D6-rs1135840, CYP2B6-rs3745274, NAT2-rs1208, and COMT- rs4680, had a significant effect on ATV pharmacokinetics (P < 0.05). The polymorphisms in SLCO1B1 and ABCB1 seemed to have a greater effect and were especially important for the shift from an intermediate to a normal metabolizer. This is the first study that demonstrates how the interaction of genetic variants affect metabolic phenotyping and improves understanding of how SLCO1B1 and ABCB1 variants that affect statin metabolism may partially explain the variability in drug response. Notwithstanding, the influence of other genetic and non-genetic factors is not ruled out.
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Affiliation(s)
- Rafael B R León-Cachón
- Center of Molecular Diagnostics and Personalized Medicine, Department of Basic Sciences, Division of Health Sciences, University of Monterrey, San Pedro Garza Garcia, Nuevo Leon, Mexico.
| | - Aileen-Diane Bamford
- Center of Molecular Diagnostics and Personalized Medicine, Department of Basic Sciences, Division of Health Sciences, University of Monterrey, San Pedro Garza Garcia, Nuevo Leon, Mexico
| | - Irene Meester
- Center of Molecular Diagnostics and Personalized Medicine, Department of Basic Sciences, Division of Health Sciences, University of Monterrey, San Pedro Garza Garcia, Nuevo Leon, Mexico
| | | | - Magdalena Gómez-Silva
- Forensic Medicine Service, School of Medicine, Autonomous University of Nuevo Leon, Monterrey, Nuevo Leon, Mexico.,Analytical Department of the Research Institute for Clinical and Experimental Pharmacology, Ipharma S.A., Monterrey, Nuevo Leon, Mexico
| | - María F García Bustos
- Institute of Experimental Pathology (CONICET), Faculty of Health Sciences, National University of Salta, Salta, Argentina.,University School in Health Sciences, Catholic University of Salta, Salta, Argentina
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Gómez-Silva M, Piñeyro-Garza E, Vargas-Zapata R, Gamino-Peña ME, León-García A, de León MB, Llerena A, León-Cachón RBR. Pharmacogenetics of amfepramone in healthy Mexican subjects reveals potential markers for tailoring pharmacotherapy of obesity: results of a randomised trial. Sci Rep 2019; 9:17833. [PMID: 31780765 PMCID: PMC6882847 DOI: 10.1038/s41598-019-54436-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Accepted: 11/12/2019] [Indexed: 12/17/2022] Open
Abstract
Amfepramone (AFP) is an appetite-suppressant drug used in the treatment of obesity. Nonetheless, studies on interindividual pharmacokinetic variability and its association with genetic variants are limited. We employed a pharmacokinetic and pharmacogenetic approach to determine possible metabolic phenotypes of AFP and identify genetic markers that could affect the pharmacokinetic variability in a Mexican population. A controlled, randomized, crossover, single-blind, two-treatment, two-period, and two sequence clinical study of AFP (a single 75 mg dose) was conducted in 36 healthy Mexican volunteers who fulfilled the study requirements. Amfepramone plasma levels were measured using high-performance liquid chromatography mass spectrometry. Genotyping was performed using real-time PCR with TaqMan probes. Four AFP metabolizer phenotypes were found in our population: slow, normal, intermediate, and fast. Additionally, two gene polymorphisms, ABCB1-rs1045642 and CYP3A4-rs2242480, had a significant effect on AFP pharmacokinetics (P < 0.05) and were the predictor factors in a log-linear regression model. The ABCB1 and CYP3A4 gene polymorphisms were associated with a fast metabolizer phenotype. These results suggest that metabolism of AFP in the Mexican population is variable. In addition, the genetic variants ABCB1-rs1045642 and CYP3A4-rs2242480 may partially explain the AFP pharmacokinetic variability.
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Affiliation(s)
- Magdalena Gómez-Silva
- Forensic Medicine Service, School of Medicine, Autonomous University of Nuevo Leon, Monterrey, Nuevo Leon, Mexico.,Analytical Department of the Research Institute for Clinical and Experimental Pharmacology, Ipharma S.A, Monterrey, Nuevo Leon, Mexico
| | - Everardo Piñeyro-Garza
- Clinical Department of the Research Institute for Clinical and Experimental Pharmacology, Ipharma S.A, Monterrey, Nuevo Leon, Mexico
| | - Rigoberto Vargas-Zapata
- Quality Assurance Department of the Research Institute for Clinical and Experimental Pharmacology, Ipharma S.A, Monterrey, Nuevo Leon, Mexico
| | - María Elena Gamino-Peña
- Statistical Department of the Research Institute for Clinical and Experimental Pharmacology, Ipharma S.A, Monterrey, Nuevo Leon, Mexico
| | | | - Mario Bermúdez de León
- Department of Molecular Biology, Center for Biomedical Research of the Northeast, Mexican Institute of Social Security, Monterrey, Nuevo Leon, Mexico
| | - Adrián Llerena
- Clinical Research Center of Health Area, Hospital and Medical School of Extremadura University, Badajoz, Spain
| | - Rafael B R León-Cachón
- Center of Molecular Diagnostics and Personalized Medicine, Department of Basic Sciences, Division of Health Sciences, University of Monterrey, San Pedro Garza Garcia, Nuevo Leon, Mexico.
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Herrera-González S, Martínez-Treviño DA, Aguirre-Garza M, Gómez-Silva M, Barrera-Saldaña HA, León-Cachón RBR. Effect of AGTR1 and BDKRB2 gene polymorphisms on atorvastatin metabolism in a Mexican population. Biomed Rep 2017; 7:579-584. [PMID: 29250329 PMCID: PMC5727754 DOI: 10.3892/br.2017.1009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Accepted: 10/12/2017] [Indexed: 12/11/2022] Open
Abstract
Discrepancies in the response to drugs are partially due to polymorphisms in genes involved in drug metabolism and transport. The frequency, pattern and impact of these polymorphisms vary among populations. In the present study, the pharmacokinetics and pharmacogenetics of atorvastatin (ATV) in a Mexican population were investigated. The study cohort exhibited differing ATV metabolizing phenotypes, and in subsequent allelic discrimination assays, single nucleotide polymorphisms in the angiotensinogen, angiotensin II type 1 receptor (AGTR1) and bradykinin B2 receptor (BDKRB2) genes were genotyped and their effects on the pharmacokinetic parameters of ATV were assessed. Additionally, association studies were performed to test for a correlation between metabolizing phenotypes and genetic variants. It was observed that carriers of the genotypes A/C and C/T in AGTR1 and BDKRB2 had higher area under the plasma concentration-time curve values from time 0 to the time of the last measurement and from time 0 extrapolated to infinity, and lower values of clearance of the fraction dose absorbed compared with homozygous carriers (P<0.05). Only the C/C genotype of BDKRB2 was associated with the fast metabolizer phenotype. These data suggest that AGTR1 and BDKRB2 are involved in ATV pharmacokinetics; a novel finding that requires confirmation in further studies.
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Affiliation(s)
- Sarahí Herrera-González
- Center of Molecular Diagnostics and Personalized Medicine, Department of Basic Sciences, Division of Health Sciences, University of Monterrey, San Pedro Garza Garcia, Nuevo León 66238, Mexico
| | - Denisse Aideé Martínez-Treviño
- Center of Molecular Diagnostics and Personalized Medicine, Department of Basic Sciences, Division of Health Sciences, University of Monterrey, San Pedro Garza Garcia, Nuevo León 66238, Mexico
| | - Marcelino Aguirre-Garza
- Center of Molecular Diagnostics and Personalized Medicine, Department of Basic Sciences, Division of Health Sciences, University of Monterrey, San Pedro Garza Garcia, Nuevo León 66238, Mexico
| | - Magdalena Gómez-Silva
- Forensic Medicine Service, School of Medicine, Autonomous University of Nuevo León, Monterrey, Nuevo León 64460, Mexico
- Analytical Department of the Research Institute for Clinical and Experimental Pharmacology, Ipharma S.A., Monterrey, Nuevo León 64460, Mexico
| | - Hugo Alberto Barrera-Saldaña
- Laboratory of Genomics and Bioinformatics, Department of Biochemistry and Molecular Medicine, School of Medicine, Autonomous University of Nuevo León, Monterrey, Nuevo León 64460, Mexico
| | - Rafael Baltazar Reyes León-Cachón
- Center of Molecular Diagnostics and Personalized Medicine, Department of Basic Sciences, Division of Health Sciences, University of Monterrey, San Pedro Garza Garcia, Nuevo León 66238, Mexico
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León-Cachón RBR, Ascacio-Martínez JA, Gamino-Peña ME, Cerda-Flores RM, Meester I, Gallardo-Blanco HL, Gómez-Silva M, Piñeyro-Garza E, Barrera-Saldaña HA. A pharmacogenetic pilot study reveals MTHFR, DRD3, and MDR1 polymorphisms as biomarker candidates for slow atorvastatin metabolizers. BMC Cancer 2016; 16:74. [PMID: 26857559 PMCID: PMC4746878 DOI: 10.1186/s12885-016-2062-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2015] [Accepted: 01/10/2016] [Indexed: 01/19/2023] Open
Abstract
Background The genetic variation underlying atorvastatin (ATV) pharmacokinetics was evaluated in a Mexican population. Aims of this study were: 1) to reveal the frequency of 87 polymorphisms in 36 genes related to drug metabolism in healthy Mexican volunteers, 2) to evaluate the impact of these polymorphisms on ATV pharmacokinetics, 3) to classify the ATV metabolic phenotypes of healthy volunteers, and 4) to investigate a possible association between genotypes and metabolizer phenotypes. Methods A pharmacokinetic study of ATV (single 80-mg dose) was conducted in 60 healthy male volunteers. ATV plasma concentrations were measured by high-performance liquid chromatography mass spectrometry. Pharmacokinetic parameters were calculated by the non-compartmental method. The polymorphisms were determined with the PHARMAchip® microarray and the TaqMan® probes genotyping assay. Results Three metabolic phenotypes were found in our population: slow, normal, and rapid. Six gene polymorphisms were found to have a significant effect on ATV pharmacokinetics: MTHFR (rs1801133), DRD3 (rs6280), GSTM3 (rs1799735), TNFα (rs1800629), MDR1 (rs1045642), and SLCO1B1 (rs4149056). The combination of MTHFR, DRD3 and MDR1 polymorphisms associated with a slow ATV metabolizer phenotype. Conclusion Further studies using a genetic preselection method and a larger population are needed to confirm these polymorphisms as predictive biomarkers for ATV slow metabolizers. Trial registration Australian New Zealand Clinical Trials Registry: ACTRN12614000851662, date registered: August 8, 2014. Electronic supplementary material The online version of this article (doi:10.1186/s12885-016-2062-2) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Rafael B R León-Cachón
- Centro de Diagnóstico Molecular y Medicina Personalizada, Departamento de Ciencias Básicas, División Ciencias de la Salud, Universidad de Monterrey, San Pedro Garza García, NL, México.,Departamento de Bioquímica y Medicina Molecular, Facultad de Medicina, Universidad Autónoma de Nuevo León, Monterrey, NL, México
| | - Jorge A Ascacio-Martínez
- Departamento de Bioquímica y Medicina Molecular, Facultad de Medicina, Universidad Autónoma de Nuevo León, Monterrey, NL, México
| | | | | | - Irene Meester
- Centro de Diagnóstico Molecular y Medicina Personalizada, Departamento de Ciencias Básicas, División Ciencias de la Salud, Universidad de Monterrey, San Pedro Garza García, NL, México
| | | | | | | | - Hugo A Barrera-Saldaña
- Departamento de Bioquímica y Medicina Molecular, Facultad de Medicina, Universidad Autónoma de Nuevo León, Monterrey, NL, México. .,Vitagénesis S.A., Monterrey, NL, México.
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León-Cachón RBR, Ascacio-Martínez JÁI, Gómez-Silva M, Piñeyro-Garza E, González-González JG, Pogue G, Simón-Buela L, Barrera-Saldaña HA. Application of Genomic Technologies in Clinical Pharmacology Research. Rev Invest Clin 2015; 67:212-218. [PMID: 26426586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Technology is the basis of scientific progress and is an essential component for continued competitiveness in industry. The development of a new drug candidate is a long and expensive process, in which a molecule undergoes several stages of research (both pre-clinical and clinical) before being approved for commercialization. Scientific progress has revolutionized the pharmaceutical industry and reshaped the processes by which new drugs are discovered, investigated, and developed. Currently, the influence of genomic variations in drug metabolism must be better understood to predict an individual´s response to a given treatment. Employing genomics tools, an individual's genetic profile may be obtained and used as the basis for prescription of the best treatment option, thus personalizing medicine. In this review, we discuss how current mainstream genomic technologies used in clinical pharmacology research can accelerate the identification of populations that can benefit the most while reducing adverse events.
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Affiliation(s)
- Rafael Baltazar Reyes León-Cachón
- Basic Science Department, Health Science Division, Universidad de Monterrey, San Pedro Garza García, N.L., México
- Biochemical and Molecular Medicine Department, Faculty of Medicine, Universidad Autónoma de Nuevo León, Monterrey, N.L., México
| | | | | | | | | | - Gregory Pogue
- Institute for Creativity and Capital (IC²), University of Texas at Austin, Austin, Texas, USA
| | | | - Hugo Alberto Barrera-Saldaña
- Biochemical and Molecular Medicine Department, Faculty of Medicine, Universidad Autónoma de Nuevo León, Monterrey, N.L., México
- Vitagénesis, S.A. de C.V., Monterrey, N.L., México
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Piñeyro-López A, Piñeyro-Garza E, Gómez-Silva M, Reyes-Araiza R, Flores-Diego MA, Borrego-Alvarado S, Gamino-Peña ME, Vargas-Zapata R, Salazar-Leal ME. Bioequivalence of single 100-mg doses of two oral formulations of topiramate: An open-label, randomized-sequence, two-period crossover study in healthy adult male Mexican volunteers. Clin Ther 2009; 31:411-7. [DOI: 10.1016/j.clinthera.2009.02.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/10/2008] [Indexed: 10/21/2022]
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Gómez-Silva M, Garza-Ocañas L, Waksman N, Rivas V, Piñeyro-López A. In vitro metabolism and toxicity assessment of toxin T-514 (Peroxisomicine A1) of Karwinskia humboldtiana in microsomes and primary cultured hepatocytes. Toxicol In Vitro 2005; 19:47-53. [PMID: 15582355 DOI: 10.1016/j.tiv.2004.06.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2004] [Accepted: 06/14/2004] [Indexed: 10/26/2022]
Abstract
T-514 (Peroxisomicine A(1)) from Karwinskia humboldtiana is a dimeric hydroxyanthracenone with a highly selective cytotoxic effect on tumor cells. We evaluated the metabolism of this compound in two in vitro systems (liver microsomes and hepatocytes) and assessed the cytotoxicity of its metabolites on normal and tumor cells. Microsomes (12.5, 125 and 250 microg of protein/ml) and hepatocytes (1 x 10(6) cells/ml) were incubated with the toxin (25 microM) for 0.5, 1, 3, 6, 9, 12 and 24 h and the samples were examined using chromatographic analysis and UV spectra. Two metabolites (M1 and M2) were detected in the rat microsomes and one (M1) in the monkey microsomes. The retention times and UV spectra of the peaks were very similar to those of the toxin T-514. M1 was isolated and identified as a mixture of two isomers. The cytotoxicity of the metabolites was evaluated in Chang liver and Hep G2 cells but they did not show the selective cytotoxic effect on tumor cells seen in the original compound.
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Affiliation(s)
- M Gómez-Silva
- Departamento de Farmacología y Toxicología, Facultad de Medicina, Universidad Autónoma de Nuevo León, Apartado Postal 146, Col. Del Valle, Nuevo León 64460, México
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