Online extraction of antihypertensive drugs and their metabolites from untreated human serum samples using restricted access carbon nanotubes in a column switching liquid chromatography system

Author(s)

de Faria, Henrique Dipe ^[1] ; Bueno, Carolina Tosin ^[2] ; Krieger, Jose Eduardo ^[2] ; Krieger, Eduardo Moacyr ^[2] ; Pereira, Alexandre Costa ^[2] ; Junior Lima Santos, Paulo Caleb ^{[2, 3]} ; Figueiredo, Eduardo Costa ^[1]

Affiliation

^[1] Fed Univ Alfenas UNIFAL MG, Lab Toxicant & Drug Anal, Alfenas, MG - Brazil

^[2] Univ Sao Paulo, Heart Inst InCor, Lab Genet & Mol Cardiol, Med Sch, Sao Paulo - Brazil

^[3] Fed Univ Sao Paulo EPM UNIFESP, Dept Pharmacol, Sao Paulo - Brazil

• Document type: Journal article
• Source: Journal of Chromatography A; v. 1528, p. 41-52, DEC 15 2017.
• Web of Science Citations: 6

Abstract

A novel analytical method was developed to determine 5 antihypertensive drugs of different pharmacological classes (angiotensin-converting enzyme inhibitors, calcium channel blockers, alpha-2 adrenergic receptor agonists, angiotensin II receptor blockers, and aldosterone receptor antagonists) and some of their metabolites in human serum. The untreated samples were directly analyzed in a column switching system using an extraction column packed with restricted access carbon nanotubes (RACNTs) in an ultra-high performance liquid chromatography coupled to a mass spectrometer (UHPLC-MS/MS). The RACNTs column was able to exclude approximately 100% of proteins from the samples in 2.0 min, maintaining the same performance for about 300 analytical cycles. The method was validated in accordance with Food and Drug Administration (FDA) guidelines, being linear for all the determined analytes in their respective analytical ranges (coefficients of determination higher than 0.99) with limits of detection (LODs) and quantification (LOQs) ranging from 0.09 to 10.85 mu g L-1 and from 0.30 to 36.17 mu g L-1, respectively. High recovery values (88-112%) were obtained as well as suitable results for inter and intra-assay accuracy and precision. The method provided an analytical frequency of 5 samples per hour, including the sample preparation and separation/detection steps. The validated method was successfully used to analyze human serum samples of patients undergoing treatment with antihypertensive drugs, being useful for pharmacometabolomic, pharmacogenomic, and pharmacokinetic studies. (C) 2017 Elsevier B.V. All rights reserved. (AU)

• FAPESP's process: 13/09295-3 - Pharmacogenetic of cardiovascular system drugs focusing on implementation
• Grantee: Paulo Caleb Júnior de Lima Santos
• Support Opportunities: Research Grants - Young Investigators Grants
• FAPESP's process: 13/24440-0 - Pharmacogenetics and pharmacometabolomics analyses for antihypertensive drugs
• Grantee: Carolina Tosin Bueno
• Support Opportunities: Scholarships in Brazil - Doctorate (Direct)