Pharmacogenetics is an area of Pharmacology that studies the contribution of genetic factors to individual responses to drugs. This branch of science involves the variability in pharmacodynamics and pharmacokinetics through the study of polymorphisms in genes encoding receptors, as well as in drug metabolism, where this area of Pharmacology has been growing and achievinging its first results with clinical use. The NSAIDS are metabolized by cytochrome P450 (CYP) family, predominantly CYP2C9. The goal of this study is to evaluate the different gene haplotypes for the pharmacokinetics of piroxicam between the different gene haplotypes for CYP2C9 that are found in this population. Therefore, 10 volunteers will be genotyped and fenotyped for this gene and their data will be confronted with the data found in the Brazilian population. For the analysis of the proposed gene, saliva will be collected and serve as a source of genomic DNA. For the molecular analysis, polymerase chain reaction (PCR) with tests validated and produced by Applied Biosystems® will be performed. For the pharmacokinetics, saliva and blood samples will be collected at various times according to protocols available in the literature, and piroxicam concentrations in the samples will be measured by HPLC. The analysis of the results will be described with a significance level of 0.05.
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