Norcotinine, or desmethylcotinine, is a urinary metabolite of nornicotine and cotinine found in smokers and users of other nicotine products including chewing tobacco and snuff. This Certified Spiking Solution® is suitable for use in nicotine testing methods or clinical and diagnostic testing of nicotine biomarkers by LC-MS/MS or GC/MS.
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Endothelium : journal of endothelial cell research, 15(5-6), 239-245 (2008-12-10)
Nicotine has been shown to induce endothelial dysfunction, which is an early marker of atherosclerosis. Nicotine undergoes extensive metabolism in the liver, forming a number of major and minor metabolites. There are very limited data on the effect of nicotine
Clinical pharmacology and therapeutics, 80(5), 522-530 (2006-11-23)
Grapefruit juice is an inhibitor of the cytochrome P450 (CYP) 3A4 enzyme and transporters such as P-glycoprotein and organic anion transporting polypeptides, leading to clinically important interactions. Our objective was to study the effect of grapefruit juice on the pharmacokinetics
Clinica chimica acta; international journal of clinical chemistry, 413(11-12), 978-984 (2012-03-08)
Mecamylamine is a nicotine antagonist under investigation in combination with nicotine replacement for smoking treatment. A simple, rapid and reliable liquid chromatography tandem mass spectrometry (LCMSMS) method was developed and validated for quantifying nicotine, cotinine, trans-3'-hydroxycotinine, norcotinine and mecamylamine in
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 877(29), 3537-3542 (2009-09-15)
An LC-MS/MS method for the simultaneous quantification of nicotine, cotinine, trans-3'-hydroxycotinine and norcotinine in human plasma was developed and fully validated. Potential endogenous and exogenous interferences were extensively evaluated and limits of quantification were determined by decreasing analyte concentration. Analytical
Drug metabolism and disposition: the biological fate of chemicals, 25(1), 47-54 (1997-01-01)
The time course of nicotine metabolite appearance in brain from 5 min-18 hr after subcutaneous administration of S-(-)-[3H-N-methyl]nicotine was determined. Results demonstrated that metabolite appearance in brain was greatest at 4 hr postadministration, whereas levels of nicotine were greatly diminished
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