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1.
Obes Sci Pract ; 4(4): 308-317, 2018 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-30151226

RESUMO

INTRODUCTION: With obesity rates and obesity-related healthcare costs increasing, policy makers must understand the scope of obesity across populations. OBJECTIVE: This study sought to characterize adult obesity using electronic health records (EHRs) available from a statewide clinical data research network, the OneFlorida Clinical Research Consortium, which contains claims and EHR data from over 12 million patients in Florida. The primary aim was to compare EHR-based Florida obesity rates with those rates obtained from the Behavioural Risk Factor Surveillance System (BRFSS). METHODS: Body mass index from OneFlorida patient data (2012-2016) was used to characterize obesity among adults 20-79 years old. Obesity rates from both OneFlorida and BRFSS (2013) were reported by demographics and by county. RESULTS: Among the 1,344,015 adults in OneFlorida with EHR data and who met inclusion criteria, the obesity rate was 37.1%. Women had higher obesity rates compared with men. Obesity rates varied within racial/ethnic groups, with the highest rate among African-Americans (45.7%). Obesity rates from OneFlorida were consistently higher than those found in BRFSS (overall 27.8%). CONCLUSIONS: Utilizing clinical big data available through hospital system and health partner collaborations provides an important view of the extent of obesity. Although these data are available only from healthcare users, they are large in scope, directly measured and are available sooner than commonly used national data sources.

2.
Pharmacogenomics J ; 18(1): 106-112, 2018 01.
Artigo em Inglês | MEDLINE | ID: mdl-27670767

RESUMO

We conducted a discovery genome-wide association study with expression quantitative trait loci (eQTL) annotation of new-onset diabetes (NOD) among European Americans, who were exposed to a calcium channel blocker-based strategy (CCB strategy) or a ß-blocker-based strategy (ß-blocker strategy) in the INternational VErapamil SR Trandolapril STudy. Replication of the top signal from the SNP*treatment interaction analysis was attempted in Hispanic and African Americans, and a joint meta-analysis was performed (total 334 NOD cases and 806 matched controls). PLEKHH2 rs11124945 at 2p21 interacted with antihypertensive exposure for NOD (meta-analysis P=5.3 × 10-8). rs11124945 G allele carriers had lower odds for NOD when exposed to the ß-blocker strategy compared with the CCB strategy (Odds ratio OR=0.38(0.24-0.60), P=4.0 × 10-5), whereas A/A homozygotes exposed to the ß-blocker strategy had increased odds for NOD compared with the CCB strategy (OR=2.02(1.39-2.92), P=2.0 × 10-4). eQTL annotation of the 2p21 locus provides functional support for regulating gene expression.


Assuntos
Anti-Hipertensivos/uso terapêutico , Diabetes Mellitus/tratamento farmacológico , Diabetes Mellitus/genética , Locos de Características Quantitativas/genética , Antagonistas Adrenérgicos beta/uso terapêutico , Negro ou Afro-Americano , Idoso , Alelos , Bloqueadores dos Canais de Cálcio/uso terapêutico , Feminino , Seguimentos , Estudo de Associação Genômica Ampla/métodos , Humanos , Hipertensão/tratamento farmacológico , Hipertensão/genética , Masculino , Metanálise como Assunto , Pessoa de Meia-Idade , Razão de Chances , Farmacogenética/métodos , Polimorfismo de Nucleotídeo Único/genética
3.
Clin Pharmacol Ther ; 102(3): 502-510, 2017 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-28090649

RESUMO

Numerous pharmacogenetic clinical guidelines and recommendations have been published, but barriers have hindered the clinical implementation of pharmacogenetics. The Translational Pharmacogenetics Program (TPP) of the National Institutes of Health (NIH) Pharmacogenomics Research Network was established in 2011 to catalog and contribute to the development of pharmacogenetic implementations at eight US healthcare systems, with the goal to disseminate real-world solutions for the barriers to clinical pharmacogenetic implementation. The TPP collected and normalized pharmacogenetic implementation metrics through June 2015, including gene-drug pairs implemented, interpretations of alleles and diplotypes, numbers of tests performed and actionable results, and workflow diagrams. TPP participant institutions developed diverse solutions to overcome many barriers, but the use of Clinical Pharmacogenetics Implementation Consortium (CPIC) guidelines provided some consistency among the institutions. The TPP also collected some pharmacogenetic implementation outcomes (scientific, educational, financial, and informatics), which may inform healthcare systems seeking to implement their own pharmacogenetic testing programs.


Assuntos
Atenção à Saúde/organização & administração , Farmacogenética/métodos , Guias de Prática Clínica como Assunto , Pesquisa Translacional Biomédica/organização & administração , Alelos , Humanos , National Institutes of Health (U.S.) , Estados Unidos
4.
Clin Transl Sci ; 9(2): 114-22, 2016 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-26946962

RESUMO

Lower melatonin level, melatonin receptor gene variations, and atenolol treatment are associated with glucose dysregulation. We investigated whether atenolol-related glucose and melatonin changes are correlated, and whether single nucleotide polymorphisms (SNPs) in melatonin candidate genes contribute to interindividual variation in glucose change. Hypertensive Caucasians (n = 232) from the Pharmacogenomic Evaluation of Antihypertensive Responses (PEAR) study treated with atenolol for 9 weeks were studied. Urinary 6-sulfatoxymelatonin (aMT6s) was measured pre- and posttreatment and normalized to urinary creatinine. Pharmacogenetic effects on glucose change of 160 SNPs in 16 melatonin candidate genes were assessed with multiple linear regression. Atenolol was associated with increased glucose (1.8 ± 10.1mg/dl, P = 0.02) and decreased aMT6s (-4.5 ± 10.1 ng/mg, P < 0.0001). However, the aMT6s change was not correlated with post-atenolol glucose change. SNP rs11649514 in PRKCB was associated with glucose change (P = 1.0×10(-4)). PRKCB is involved in the melatonin-insulin regulatory pathway, and may be important in mediating clinically meaningful atenolol-related hyperglycemia.


Assuntos
Atenolol/farmacologia , Glucose/metabolismo , Melatonina/metabolismo , Transdução de Sinais/efeitos dos fármacos , Atenolol/administração & dosagem , Atenolol/farmacocinética , Glicemia/metabolismo , Jejum/sangue , Feminino , Humanos , Masculino , Melatonina/análogos & derivados , Melatonina/genética , Melatonina/urina , Pessoa de Meia-Idade , Polimorfismo de Nucleotídeo Único/genética , Proteína Quinase C beta/genética , População Branca
5.
Clin Transl Sci ; 9(1): 36-42, 2016 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-26751406

RESUMO

Genotype-based algorithms that include VKORC1 and CYP2C9 genotypes are less predictive of warfarin dose variability in Africans as opposed to Europeans. Polymorphisms in GGCX, FPGS, or STX1B are associated with warfarin dose requirements in African-Americans. We sought to determine if they influenced warfarin dose in European-Americans, and another African population, specifically Egyptians. We genotyped 529 adults (n = 325 European-Americans, 204 Egyptians) on a stable warfarin dose for GGCX rs12714145 and rs10654848, FPGS rs7856096, and STX1B rs4889606. Rs12714145, rs10654848, and rs7856096 were not associated with warfarin dose, whereas STX1B rs4889606 was a significant determinant in univariate analysis (P < 0.0001) in both cohorts. However, STX1B rs4889606 was in high linkage disequilibrium with VKORC1-1639 G>A, and was no longer significant after including VKORC1-1639 G>A in the regression model. Based on these data, the polymorphisms do not appear to influence, in a clinically important way, warfarin dose requirements in European-Americans and Egyptians.


Assuntos
Carbono-Carbono Ligases/genética , Peptídeo Sintases/genética , Polimorfismo de Nucleotídeo Único/genética , Sintaxina 1/genética , Varfarina/administração & dosagem , População Branca/genética , Adulto , Idoso , Estudos de Coortes , Relação Dose-Resposta a Droga , Egito , Feminino , Humanos , Desequilíbrio de Ligação/genética , Masculino , Repetições de Microssatélites/genética , Pessoa de Meia-Idade , Análise de Regressão , Varfarina/farmacologia
6.
Pharmacogenomics J ; 15(2): 153-7, 2015 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-25201287

RESUMO

Hypokalemia is a recognized adverse effect of thiazide diuretic treatment. This phenomenon, which may impair insulin secretion, has been suggested to be a reason for the adverse effects on glucose metabolism associated with thiazide diuretic treatment of hypertension. However, the mechanisms underlying thiazide diuretic-induced hypokalemia are not well understood. In an effort to identify genes or genomic regions associated with potassium response to hydrochlorothiazide, without a priori knowledge of biologic effects, we performed a genome-wide association study and a multiethnic meta-analysis in 718 European- and African-American hypertensive participants from two different pharmacogenetic studies. Single-nucleotide polymorphisms rs10845697 (Bayes factor=5.560) on chromosome 12, near to the HEME binding protein 1 gene, and rs11135740 (Bayes factor=5.258) on chromosome 8, near to the Mitoferrin-1 gene, reached genome-wide association study significance (Bayes factor >5). These results, if replicated, suggest a novel mechanism involving effects of genes in the HEME pathway influencing hydrochlorothiazide-induced renal potassium loss.


Assuntos
Anti-Hipertensivos/uso terapêutico , Proteínas de Transporte/genética , Heme/genética , Hemeproteínas/genética , Hidroclorotiazida/uso terapêutico , Polimorfismo de Nucleotídeo Único/genética , Potássio/metabolismo , Negro ou Afro-Americano/genética , Teorema de Bayes , Proteínas de Transporte de Cátions/genética , Cromossomos Humanos Par 12/genética , Cromossomos Humanos Par 8/genética , Feminino , Estudo de Associação Genômica Ampla/métodos , Proteínas Ligantes de Grupo Heme , Humanos , Hidroclorotiazida/metabolismo , Hipertensão/tratamento farmacológico , Hipertensão/genética , Hipertensão/metabolismo , Hipopotassemia/tratamento farmacológico , Hipopotassemia/genética , Hipopotassemia/metabolismo , Masculino , Pessoa de Meia-Idade , Proteínas Mitocondriais/genética , População Branca/genética
7.
CPT Pharmacometrics Syst Pharmacol ; 4(11): 669-79, 2015 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-26783503

RESUMO

Achieving hypertension (HTN) control and mitigating the adverse health effects associated with HTN continues to be a global challenge. Some individuals respond poorly to current HTN therapies, and mechanisms for response variation remain poorly understood. We used a nontargeted metabolomics approach (gas chromatography time-of-flight/mass spectrometry gas chromatography time-of-flight/mass spectrometry) measuring 489 metabolites to characterize metabolite signatures associated with treatment response to anti-HTN drugs, atenolol (ATEN), and hydrochlorothiazide (HCTZ), in white and black participants with uncomplicated HTN enrolled in the Pharmacogenomic Evaluation of Antihypertensive Responses study. Metabolite profiles were significantly different between races, and metabolite responses associated with home diastolic blood pressure (HDBP) response were identified. Metabolite pathway analyses identified gluconeogenesis, plasmalogen synthesis, and tryptophan metabolism increases in white participants treated with HCTZ (P < 0.05). Furthermore, we developed predictive models from metabolite signatures of HDBP treatment response (P < 1 × 10(-5)). As part of a quantitative systems pharmacology approach, the metabolites identified herein may serve as biomarkers for improving treatment decisions and elucidating mechanisms driving HTN treatment responses.

8.
Clin Pharmacol Ther ; 96(4): 423-8, 2014 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-24918167

RESUMO

Simvastatin is among the most commonly used prescription medications for cholesterol reduction. A single coding single-nucleotide polymorphism, rs4149056T>C, in SLCO1B1 increases systemic exposure to simvastatin and the risk of muscle toxicity. We summarize evidence from the literature supporting this association and provide therapeutic recommendations for simvastatin based on SLCO1B1 genotype. This article is an update to the 2012 Clinical Pharmacogenetics Implementation Consortium guideline for SLCO1B1 and simvastatin-induced myopathy.


Assuntos
Inibidores de Hidroximetilglutaril-CoA Redutases/uso terapêutico , Doenças Musculares/induzido quimicamente , Transportadores de Ânions Orgânicos/genética , Sinvastatina/uso terapêutico , Interações Medicamentosas , Genótipo , Humanos , Inibidores de Hidroximetilglutaril-CoA Redutases/efeitos adversos , Inibidores de Hidroximetilglutaril-CoA Redutases/farmacocinética , Transportador 1 de Ânion Orgânico Específico do Fígado , Farmacogenética , Polimorfismo Genético , Sinvastatina/efeitos adversos , Sinvastatina/farmacocinética
9.
J Intern Med ; 276(5): 486-97, 2014 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-24612202

RESUMO

OBJECTIVE: Elevations in uric acid (UA) and the associated hyperuricaemia are commonly observed secondary to treatment with thiazide diuretics. We sought to identify novel single nucleotide polymorphisms (SNPs) associated with hydrochlorothiazide (HCTZ)-induced elevations in UA and hyperuricaemia. METHODS: A genome-wide association study of HCTZ-induced changes in UA was performed in Caucasian and African American participants from the pharmacogenomic evaluation of antihypertensive responses (PEAR) study who were treated with HCTZ monotherapy. Suggestive SNPs were replicated in Caucasians and African Americans from the PEAR study who were treated with HCTZ add-on therapy. Replicated regions were followed up through expression and pathway analysis. RESULTS: Five unique gene regions were identified in African Americans (LUC7L2, ANKRD17/COX18, FTO, PADI4 and PARD3B), and one region was identified in Caucasians (GRIN3A). Increases in UA of up to 1.8 mg dL(-1) were observed following HCTZ therapy in individuals homozygous for risk alleles, with heterozygotes displaying an intermediate phenotype. Several risk alleles were also associated with an increased risk of HCTZ-induced clinical hyperuricaemia. A composite risk score, constructed in African Americans using the 'top' SNP from each gene region, was strongly associated with HCTZ-induced UA elevations (P = 1.79 × 10(-7) ) and explained 11% of the variability in UA response. Expression studies in RNA from whole blood revealed significant differences in expression of FTO by rs4784333 genotype. Pathway analysis showed putative connections between many of the genes identified through common microRNAs. CONCLUSION: Several novel gene regions were associated with HCTZ-induced UA elevations in African Americans (LUC7L2, COX18/ANKRD17, FTO, PADI4 and PARD3B), and one region was associated with these elevations in Caucasians (GRIN3A).


Assuntos
Anti-Hipertensivos/efeitos adversos , Negro ou Afro-Americano/genética , Diuréticos/efeitos adversos , Hidroclorotiazida/efeitos adversos , Hiperuricemia/induzido quimicamente , Hiperuricemia/genética , Polimorfismo de Nucleotídeo Único , População Branca/genética , Adulto , Feminino , Estudo de Associação Genômica Ampla , Genótipo , Humanos , Hipertensão/sangue , Hipertensão/tratamento farmacológico , Masculino , Pessoa de Meia-Idade , Farmacogenética , Fatores de Risco
10.
Clin Pharmacol Ther ; 96(2): 175-81, 2014 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-24637943

RESUMO

Metoprolol is a selective ß-1 adrenergic receptor blocker that undergoes extensive metabolism by the polymorphic enzyme cytochrome P450 2D6 (CYP2D6). Our objective was to investigate the influence of CYP2D6 polymorphisms on the efficacy and tolerability of metoprolol tartrate. Two hundred and eighty-one participants with uncomplicated hypertension received 50 mg of metoprolol twice daily followed by response-guided titration to 100 mg twice daily. Phenotypes were assigned based on results of CYP2D6 genotyping and copy number variation assays. Clinical response to metoprolol and adverse effect rates were analyzed in relation to CYP2D6 phenotypes using appropriate statistical tests. Heart rate response differed significantly by CYP2D6 phenotype (P < 0.0001), with poor and intermediate metabolizers showing greater reduction. However, blood pressure response and adverse effect rates were not significantly different by CYP2D6 phenotype. Other than a significant difference in heart rate response, CYP2D6 polymorphisms were not determinants of variability in metoprolol response or tolerability.


Assuntos
Anti-Hipertensivos/uso terapêutico , Citocromo P-450 CYP2D6/genética , Hipertensão/tratamento farmacológico , Hipertensão/genética , Metoprolol/uso terapêutico , Polimorfismo Genético/genética , Adulto , Anti-Hipertensivos/efeitos adversos , Anti-Hipertensivos/farmacologia , Pressão Sanguínea/efeitos dos fármacos , Pressão Sanguínea/fisiologia , Depressão/induzido quimicamente , Depressão/diagnóstico , Fadiga/induzido quimicamente , Fadiga/diagnóstico , Feminino , Frequência Cardíaca/efeitos dos fármacos , Frequência Cardíaca/fisiologia , Humanos , Hipertensão/enzimologia , Masculino , Metoprolol/efeitos adversos , Metoprolol/farmacologia , Pessoa de Meia-Idade , Resultado do Tratamento
11.
Pharmacogenomics J ; 14(1): 35-40, 2014 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-23400010

RESUMO

Hydrochlorothiazide (HCTZ) is one of the most widely prescribed antihypertensive medications. Although it is well known that HCTZ is associated with hyperglycemia and hypertriglyceridemia, the mechanisms underlying these adverse effects are not well understood. We performed a genome-wide association study and meta-analysis of the change in fasting plasma glucose and triglycerides in response to HCTZ from two different clinical trials: the Pharmacogenomic Evaluation of Antihypertensive Responses and the Genetic Epidemiology of Responses to Antihypertensive studies. Two single-nucleotide polymorphisms (rs12279250 and rs4319515 (r(2)=0.73)), located at 11p15.1 in the NELL1 gene, achieved genome-wide significance for association with change in fasting plasma triglycerides in African Americans, whereby each variant allele was associated with a 28 mg dl(-1) increase in the change in triglycerides. NELL1 encodes a cytoplasmic protein that contains epidermal growth factor-like repeats and has been shown to represses adipogenic differentiation. These findings may represent a novel mechanism underlying HCTZ-induced adverse metabolic effects.


Assuntos
Anti-Hipertensivos/efeitos adversos , Negro ou Afro-Americano/genética , Hidroclorotiazida/efeitos adversos , Hipertensão/tratamento farmacológico , Metabolismo dos Lipídeos/genética , Proteínas do Tecido Nervoso/genética , Adipogenia/genética , Anti-Hipertensivos/administração & dosagem , Anti-Hipertensivos/uso terapêutico , Glicemia/análise , Proteínas de Ligação ao Cálcio , Estudo de Associação Genômica Ampla , Humanos , Hidroclorotiazida/administração & dosagem , Hidroclorotiazida/uso terapêutico , Hipertensão/genética , Hipertensão/metabolismo , Triglicerídeos/sangue
12.
Pharmacogenomics J ; 13(3): 257-63, 2013 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-22350108

RESUMO

A recent genome-wide analysis discovered an association between a haplotype (from rs317689/rs315135/rs7297610) on Chromosome 12q15 and blood pressure response to hydrochlorothiazide (HCTZ) in African-Americans. Our aim was to replicate this association and investigate possible functional mechanisms. We observed similar associations between this haplotype and HCTZ response in an independent sample of 746 Caucasians and African-Americans randomized to HCTZ or atenolol treatment. The haplotype association was driven by variation at rs7297610, where C/C genotypes were associated with greater mean (systolic: 3.4 mmHg, P=0.0275; diastolic: 2.5 mmHg, P=0.0196) responses to HCTZ vs T-allele carriers. Such an association was absent in atenolol-treated participants, supporting this as HCTZ specific. Expression analyses in HCTZ-treated African-Americans showed differential pre-treatment leukocyte YEATS4 expression between rs7297610 genotype groups (P=0.024), and reduced post-treatment expression in C/C genotypes (P=0.009), but not in T-carriers. Our data confirm previous genome-wide findings at 12q15 and suggest differential YEATS4 expression could underpin rs7297610-associated HCTZ response variability, which may have future implications for guiding thiazide treatment.


Assuntos
Estudo de Associação Genômica Ampla , Hidroclorotiazida/administração & dosagem , Hipertensão/genética , Fatores de Transcrição/genética , Adulto , Negro ou Afro-Americano/genética , Anti-Hipertensivos/administração & dosagem , Atenolol , Pressão Sanguínea/genética , Cromossomos Humanos Par 12/genética , Ensaios Clínicos como Assunto , Feminino , Regulação da Expressão Gênica/efeitos dos fármacos , Regulação da Expressão Gênica/genética , Genótipo , Haplótipos , Humanos , Hipertensão/tratamento farmacológico , Hipertensão/patologia , Masculino , Pessoa de Meia-Idade , Polimorfismo de Nucleotídeo Único , População Branca/genética
13.
Immunogenetics ; 65(1): 83-90, 2013 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-23081744

RESUMO

Tyrosine kinase inhibitors (TKi) hold promise as a treatment for a variety of disorders ranging from those in oncology to diseases thought as immune mediated. Tyrphostin AG490 is a potent Jak-Stat TKi shown effective in the prevention of allograft transplant rejection, experimental autoimmune disease, as well as the treatment of cancer. However, given its ability to modulate this important but pleiotropic intracellular pathway, we thought that it is important to examine its effects on glucose metabolism and expression of major transcription factors and adipokines associated with insulin insensitivity and diabetes. We investigated the metabolic effects of AG490 on glucose levels in vivo using an animal model of diabetes, nonobese diabetic (NOD) mice, and transcription factor expression through assessment of human adipocytes. AG490 treatment of young nondiabetic NOD mice significantly reduced blood glucose levels (p = 0.002). In vitro, treatment of adipocytes with rosiglitazone, an insulin sensitizer that binds to peroxisome proliferator-activated receptor (PPAR) receptors and increases the adipocyte response to insulin, significantly increased the expression of the antidiabetic adipokine adiponectin. Importantly, the combination of rosiglitazone plus Tyrphostin AG490 further increased this effect and was specifically associated with significant upregulation of C-enhanced binding protein (C/EBP) (p < 0.0001). In terms of the mechanism underlying this action, regulatory regions of the PPARγ, ADIPOQ, and C/EBP contain the Stat5 DNA-binding sequences and were demonstrated, by gel shift experiments in vitro. These data suggest that blocking Jak-Stat signaling with AG490 reduces blood glucose levels and modulates the expression of transcription factors previously associated with diabetes, thereby supporting its potential as a therapy for this disease.


Assuntos
Adipócitos/efeitos dos fármacos , Adipócitos/metabolismo , Diabetes Mellitus Tipo 1/metabolismo , Inibidores Enzimáticos/farmacologia , Tiazolidinedionas/farmacologia , Tirfostinas/farmacologia , Adiponectina/metabolismo , Animais , Biomarcadores/análise , Glicemia/metabolismo , Proteínas de Ligação a DNA/metabolismo , Diabetes Mellitus Tipo 1/tratamento farmacológico , Inibidores Enzimáticos/administração & dosagem , Glucose/análise , Hipoglicemiantes/administração & dosagem , Hipoglicemiantes/farmacologia , Janus Quinases/antagonistas & inibidores , Camundongos , Camundongos Endogâmicos NOD , PPAR gama/antagonistas & inibidores , PPAR gama/metabolismo , Proteínas Tirosina Quinases/antagonistas & inibidores , Rosiglitazona , Tiazolidinedionas/administração & dosagem , Tirfostinas/administração & dosagem
14.
Pharmacogenomics J ; 13(5): 430-6, 2013 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-22907731

RESUMO

Thiazide-induced potassium loss may contribute to new onset diabetes (NOD). KCNJ1 encodes a potassium channel and one study observed that a KCNJ1 single-nucleotide polymorphism (SNP) was associated with changes in fasting glucose (FG) during hydrochlorothiazide (HCTZ) treatment. We used linear regression to test association of KCNJ1 SNPs and haplotypes with FG changes during HCTZ treatment in the Pharmacogenomic Evaluation of Antihypertensive Responses (PEAR) study. We used logistic regression to test association of KCNJ1 variation with NOD in HCTZ-treated patients from the International Verapamil SR Trandolapril Study (INVEST). Multivariate regression analyses were performed by race/ethnicity with false discovery rate (FDR) correction. In PEAR blacks, a KCNJ1 SNP was associated with increased FG during HCTZ treatment (beta=8.47, P(FDR)=0.009). KCNJ1 SNPs and haplotypes were associated with NOD risk in all INVEST race/ethnic groups (strongest association: odds ratio 2.14 (1.31-3.53), P(FDR)=0.03). Our findings support that KCNJ1 variation is associated with HCTZ-induced dysglycemia and NOD.


Assuntos
Anti-Hipertensivos/uso terapêutico , Diabetes Mellitus/genética , Diabetes Mellitus/metabolismo , Jejum/metabolismo , Glucose/metabolismo , Hidroclorotiazida/uso terapêutico , Polimorfismo de Nucleotídeo Único/genética , Canais de Potássio Corretores do Fluxo de Internalização/genética , Idoso , Atenolol/uso terapêutico , Diabetes Mellitus/tratamento farmacológico , Feminino , Haplótipos , Humanos , Masculino , Pessoa de Meia-Idade , Farmacogenética/métodos , Canais de Potássio Corretores do Fluxo de Internalização/metabolismo , Estudos Prospectivos , Verapamil/uso terapêutico
15.
Clin Pharmacol Ther ; 92(1): 112-7, 2012 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-22617227

RESUMO

Cholesterol reduction from statin therapy has been one of the greatest public health successes in modern medicine. Simvastatin is among the most commonly used prescription medications. A non-synonymous coding single-nucleotide polymorphism (SNP), rs4149056, in SLCO1B1 markedly increases systemic exposure to simvastatin and the risk of muscle toxicity. This guideline explores the relationship between rs4149056 (c.521T>C, p.V174A) and clinical outcome for all statins. The strength of the evidence is high for myopathy with simvastatin. We limit our recommendations accordingly.


Assuntos
Inibidores de Hidroximetilglutaril-CoA Redutases , Doenças Musculares , Transportadores de Ânions Orgânicos/genética , Polimorfismo de Nucleotídeo Único , Sinvastatina , Prescrições de Medicamentos , Humanos , Inibidores de Hidroximetilglutaril-CoA Redutases/administração & dosagem , Inibidores de Hidroximetilglutaril-CoA Redutases/efeitos adversos , Inibidores de Hidroximetilglutaril-CoA Redutases/farmacocinética , Transportador 1 de Ânion Orgânico Específico do Fígado , Doenças Musculares/induzido quimicamente , Doenças Musculares/genética , Farmacogenética , Medicina de Precisão , Medição de Risco , Fatores de Risco , Sinvastatina/administração & dosagem , Sinvastatina/efeitos adversos , Sinvastatina/farmacocinética
16.
Clin Pharmacol Ther ; 86(5): 533-9, 2009 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-19571804

RESUMO

For combination antihypertensive therapy with thiazide diuretics and beta-blockers, the effect of the order of initiation of the drugs on the outcome has not been tested. Patients with uncomplicated hypertension were randomized to receive either hydrochlorothiazide (HCTZ) or atenolol monotherapy, followed by addition of the alternative drug. Blood pressure (BP) responses were evaluated by race and order of drug initiation. A total of 368 participants received combination therapy. Among the participants, blacks showed a greater BP-lowering effect than whites did with HCTZ monotherapy (-13.0/-7.4 mm Hg vs. -8.0/-4.2 mm Hg, P < 0.001) but a smaller BP-lowering effect than did whites with atenolol monotherapy (-1.1/-2.9 mm Hg vs. -9.9/-9.2 mm Hg, P < 0.0001). These differences were not evident during combination therapy. However, both groups showed greater response to HCTZ + atenolol than to atenolol + HCTZ (-19.1/-14.2 mm Hg vs. -15.6/-11.3 mm Hg, P < 0.0001). Despite optimal dosing of HCTZ + atenolol, only two-thirds of the participants achieved BP control. In HCTZ/atenolol combination antihypertensive therapy, the order in which the drugs are initiated affects total BP lowering during the first 4-6 months of therapy.


Assuntos
Anti-Hipertensivos/uso terapêutico , Atenolol/uso terapêutico , Pressão Sanguínea/efeitos dos fármacos , Hidroclorotiazida/uso terapêutico , Hipertensão/tratamento farmacológico , Adulto , Anti-Hipertensivos/administração & dosagem , Atenolol/administração & dosagem , População Negra , Esquema de Medicação , Quimioterapia Combinada , Feminino , Seguimentos , Humanos , Hidroclorotiazida/administração & dosagem , Hipertensão/fisiopatologia , Masculino , Pessoa de Meia-Idade , População Branca
17.
Clin Pharmacol Ther ; 85(1): 36-44, 2009 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-18946466

RESUMO

Genetic variants of ACE are suspected risk factors in cardiovascular disease, but the alleles responsible for the variations remain unidentified. To search for regulatory polymorphisms, allelic angiotensin I-converting enzyme (ACE) mRNA expression was measured in 65 heart tissues, followed by genotype scanning of the ACE locus. Marked allelic expression imbalance (AEI) detected in five African-American subjects was associated with single-nucleotide polymorphisms (SNPs) (rs7213516, rs7214530, and rs4290) residing in conserved regions 2-3 kb upstream of ACE. Moreover, each of the SNPs affected transcription in reporter gene assays. SNPs rs4290 and rs7213516 were tested for associations with adverse cardiovascular outcomes in hypertensive patients with coronary disease (International Verapamil SR Trandolapril Study Genetic Substudy (INVEST-GENES), n = 1,032). Both SNPs were associated with adverse cardiovascular outcomes, largely attributable to nonfatal myocardial infarction in African Americans, showing an odds ratio of 6.16 (2.43-15.60) (P < 0.0001) for rs7213516. The high allele frequency in African Americans (16%) compared to Hispanics (4%) and Caucasians (<1%) suggests that these alleles contribute to variation between populations in cardiovascular risk and treatment outcomes.


Assuntos
Negro ou Afro-Americano/genética , Genes Reporter/genética , Variação Genética/genética , Hipertensão/genética , Peptidil Dipeptidase A/genética , Polimorfismo Genético/genética , Polimorfismo de Nucleotídeo Único/genética , RNA Mensageiro/genética , Idoso , Anti-Hipertensivos/uso terapêutico , Estudos de Casos e Controles , Doença das Coronárias/complicações , Etnicidade/genética , Feminino , Humanos , Hipertensão/complicações , Hipertensão/tratamento farmacológico , Masculino , Peptidil Dipeptidase A/fisiologia , Reação em Cadeia da Polimerase Via Transcriptase Reversa , Fatores de Risco
18.
Clin Pharmacol Ther ; 84(6): 715-21, 2008 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-18615004

RESUMO

Numerous studies have demonstrated that beta(1)- and beta(2)-adrenergic receptor gene (ADRB1 and ADRB2) variants influence cardiovascular risk and beta-blocker responses in hypertension and heart failure. We evaluated the relationship between ADRB1 and ADRB2 haplotypes, cardiovascular risk (death, nonfatal myocardial infarction (MI), and nonfatal stroke), and atenolol-based vs. verapamil sustained-release (SR)-based antihypertensive therapy in 5,895 coronary artery disease (CAD) patients. After an average of 2.8 years, death rates were higher in patients carrying the ADRB1 Ser49-Arg389 haplotype (hazard ratio (HR) 3.66, 95% confidence interval (95% CI) 1.68-7.99). This mortality risk was significant in patients randomly assigned to verapamil SR (HR 8.58, 95% CI 2.06-35.8) but not atenolol (HR 2.31, 95% CI 0.82-6.55), suggesting a protective role for the beta-blocker. ADRB2 haplotype associations were divergent within the treatment groups but did not remain significant after adjustment for multiple comparisons. ADRB1 haplotype variation is associated with mortality risk, and beta-blockers may be preferred in subgroups of patients defined by ADRB1 or ADRB2 polymorphisms.


Assuntos
Antagonistas Adrenérgicos beta/administração & dosagem , Hipertensão/tratamento farmacológico , Hipertensão/genética , Polimorfismo Genético , Receptores Adrenérgicos beta 1/genética , Receptores Adrenérgicos beta 2/genética , Idoso , Atenolol/administração & dosagem , Atenolol/farmacocinética , Intervalos de Confiança , Doença das Coronárias/tratamento farmacológico , Doença das Coronárias/genética , Doença das Coronárias/mortalidade , Relação Dose-Resposta a Droga , Esquema de Medicação , Feminino , Heterozigoto , Humanos , Hipertensão/mortalidade , Masculino , Pessoa de Meia-Idade , Farmacogenética , Probabilidade , Modelos de Riscos Proporcionais , Receptores Adrenérgicos beta 1/efeitos dos fármacos , Receptores Adrenérgicos beta 2/efeitos dos fármacos , Valores de Referência , Medição de Risco , Análise de Sobrevida , Resultado do Tratamento , Verapamil/administração & dosagem , Verapamil/farmacocinética
19.
Clin Pharmacol Ther ; 81(3): 386-91, 2007 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-17339868

RESUMO

In the CYP3A5 gene, the A>G (*3) and G>A (*6) polymorphisms result in severely decreased expression of CYP3A5 enzyme relative to a normal functional allele (*1). We sought to determine if the CYP3A5 genetic polymorphisms were associated with level of blood pressure (BP), risk of hypertension (HTN), and the antihypertensive response to verapamil. A total of 676 normotensive and hypertensive participants (mean age 49+/-8.2 years) from the Hypertension Genes study and 722 patients (mean age 66+/-9 years) from the International Verapamil/Trandolapril Study Genetic Substudy (INVEST-GENES) were genotyped for CYP3A5 to test for associations with BP, HTN, and in the latter cohort, antihypertensive response to verapamil. CYP3A5 haplotypes were determined using PHASE 2, with any allele containing either (*3) or (*6) designated as non functional. In the HTN genes population, there were no significant differences based on the number of functional CYP3A5 alleles, in systolic blood pressure (SBP) or diastolic blood pressure (DBP) among the normotensive whites or blacks (all P> or =0.70) or in allele frequency between normotensives and hypertensives. In INVEST-GENES, when controlled for baseline BP, race, age, and gender, untreated BP in carriers versus non carriers of a CYP3A5 functional allele was 158.2+/-13.7 and 154.8+/-13.7 (P=0.061), respectively. CYP3A5 functional allele status was marginally associated with the SBP response to verapamil in blacks (P=0.075) and Hispanics (P=0.056), but not in whites (P=0.40), with the effect being largely driven by higher SBP in the carriers of two functional alleles. There was no association with DBP response and CYP3A5 allele status. CYP3A5 genotype does not contribute importantly to BP or risk of HTN, but may influence response to calcium channel blockers in populations in which carrier status of two functional alleles is common.


Assuntos
Bloqueadores dos Canais de Cálcio/farmacocinética , Bloqueadores dos Canais de Cálcio/uso terapêutico , Sistema Enzimático do Citocromo P-450/genética , Hipertensão/tratamento farmacológico , Hipertensão/genética , Polimorfismo Genético/genética , Verapamil/farmacocinética , Verapamil/uso terapêutico , Adulto , Idoso , População Negra , Pressão Sanguínea/efeitos dos fármacos , Estudos de Coortes , Citocromo P-450 CYP3A , DNA/genética , Feminino , Genótipo , Hispânico ou Latino , Humanos , Masculino , Pessoa de Meia-Idade , Farmacogenética , Reação em Cadeia da Polimerase Via Transcriptase Reversa , População Branca
20.
Clin Cardiol ; 24(11 Suppl): V24-9, 2001 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-11712773

RESUMO

Three large, ongoing, international clinical trials will greatly improve our understanding of hypertension management. The trials, which include the INternational VErapamil SR/trandolapril STudy (INVEST), the Antihypertensive and Lipid Lowering Treatment to Prevent Heart Attack Trial (ALLHAT), and the Controlled ONset Verapamil INvestigation of Cardiovascular Endpoints (CONVINCE) trial, enrolled a combined total of 81,649 patients over a 7-year period from 18 different countries in North America, South America, Europe, and Australia-Asia. The mean age of all subjects was 66 years, and the mean body mass index (BMI) was 29.5. In addition, 30% of all patients had diabetes and 43% had documented coronary artery disease (CAD). In INVEST, 100% of enrolled patients had documented CAD and 27% had diabetes. Of patients treated for 12 months in INVEST, a systolic blood pressure (SBP) <140 mmHg was achieved by 70% of nondiabetics, and 66% of patients with diabetes achieved that level. Of all the patients enrolled in the three trials, 38% were smokers, 25% had a history of myocardial infarction (MI) or stroke, and 52% had a history of dyslipidemia. Although these clinical trials are likely to influence treatment guidelines, they may not affect the way medicine is practiced. A survey of primary care physicians found that 41% had not heard of or were not familiar with the Joint National Committee on Detection, Evaluation, and Treatment of High Blood Pressure (JNC VI) guidelines. The JNC VI and European guidelines provide management strategies based on severity of coronary risk factors, target organ damage, and blood pressure levels. Primary care physicians have a responsibility to be educated about risk stratification, goals of treatment based on risk, and management strategies for hypertension from available treatment guidelines.


Assuntos
Hipertensão/tratamento farmacológico , Padrões de Prática Médica , Ensaios Clínicos Controlados Aleatórios como Assunto , Idoso , Feminino , Previsões , Humanos , Masculino , Guias de Prática Clínica como Assunto
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