title: Analysis of cholesterol, cholesterol-5,6-epoxides and cholestane-3 beta,5 alpha,6 beta-triol in nipple aspirates of human breast fluid by gas chromatography/mass spectrometry.
abstract: A method has been developed for the quantitative determination of cholesterol and three of its major oxidative metabolites (the 5 alpha,6 alpha-epoxide, the 3 beta,5 alpha,6 beta-triol, and the 5 beta,6 beta-epoxide) in a single sample of human breast fluid (2-50 microliters), using gas chromatography/mass spectrometry with selected ion monitoring. High specificity and reliable quantification is achieved by the use of the inverse stable isotope dilution method, employing deuterium-labeled variants of the compounds as internal standards.
mesh_terms: D000328:Adult; D000368:Aged; D001826:Body Fluids / Q000032:analysis*; D001940:Breast / Q000378:metabolism*; D002777:Cholestanols / Q000032:analysis*; D002784:Cholesterol / Q000031:analogs & derivatives* / Q000032:analysis*; D005260:Female; D008401:Gas Chromatography-Mass Spectrometry; D006801:Humans; D008875:Middle Aged; D009558:Nipples / Q000378:metabolism*
chemical_list: D002777:Cholestanols; C000474:cholestane-3,5,6-triol; C002415:cholesterol alpha-oxide; D002784:Cholesterol