The evolution of methods for urinary steroid metabolomics in clinical investigations particularly in childhood

Publication date: July 2018Source: The Journal of Steroid Biochemistry and Molecular Biology, Volume 181Author(s): John W. Honour, E. Conway, R. Hodkinson, F. LamAbstractThe metabolites of cortisol, and the intermediates in the pathways from cholesterol to cortisol and the adrenal sex steroids can be analysed in a single separation of steroids by gas chromatography (GC) coupled to MS to give a urinary steroid profile (USP). Steroids individually and in profile are now commonly measured in plasma by liquid chromatography (LC) coupled with MS/MS. The steroid conjugates in urine can be determined after hydrolysis and derivative formation and for the first time without hydrolysis using GC–MS, GC–MS/MS and liquid chromatography with mass spectrometry (LC–MS/MS). The evolution of the technology, practicalities and clinical applications are examined in this review. The patterns and quantities of steroids changes through childhood. Information can be obtained on production rates, from which children with steroid excess and deficiency states can be recognised when presenting with obesity, adrenarche, adrenal suppression, hypertension, adrenal tumours, intersex condition and early puberty, as examples. Genetic defects in steroid production and action can be detected by abnormalities from the GC–MS of steroids in urine. New mechanisms of steroid synthesis and metabolism have been recognised through steroid profiling. GC with tandem mass spectrometry (GC–MS/MS) has been used fo...
Source: The Journal of Steroid Biochemistry and Molecular Biology - Category: Biochemistry Source Type: research