A rapid and simple method for the analysis of 1-hydroxypyrene glucuronide: a potential biomarker for polycyclic aromatic hydrocarbon exposure

Carcinogenesis
R SinghE H Weyand

Abstract

The present study describes a simple method of analyzing metabolites of pyrene in urine. This method is capable of detecting the glucuronic acid and sulfate conjugates of pyrene as well as free 1-hydroxypyrene in a single analysis. In comparison to other analytical methods for detecting pyrene metabolites, this new method does not require an overnight enzymatic hydrolysis step and is much more rapid method of analysis. The newly developed procedure involves solid phase extraction of pyrene metabolites followed by separation using HPLC with a phenyl modified reverse phase column and an acidic buffer and acetonitrile gradient elution system. Metabolites were detected using a fluorescence detector with wavelength conditions optimized for each metabolite. This method resulted in baseline separation of the glucuronic acid (1-OH P-GlcUA) and sulfate conjugate (1-OH P-Sul) of 1-hydroxypyrene and free 1-hydroxypyrene (1-OH P). The potential of this method for use in monitoring human exposure to mixtures of PAHs was evaluated by analyzing urine obtained from five individuals working in a coal gasification plant. 1-OH P-GlcUA was detected as the major metabolite in the urine of all the five workers. This metabolite accounted for 80-100% ...Continue Reading

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