title: Micro-analytical identification, by NMR, of elevated steroid in urine of Cushing's syndrome patients.
abstract: We previously reported that the daily urinary unidentified ketosteroid glucuronide (US-G) level in patients with Cushing's syndrome was much higher than that in the healthy subjects. Furthermore, urine samples from patients with Cushing's syndrome, including those with pituitary adenoma and adrenal adenoma, yielded almost the same high excretion levels, despite the different sites of the adenomas. We extracted US obtained by hydrolysis of US-G in urine of patients with Cushing's syndrome, purified it, and analyzed its chemical structure. Molecular weight and molecular formula were analyzed by MS spectrometry, and the chemical structure was analyzed by NMR spectrometry, utilizing small quantities of refined US. The substance has a molecular weight of 304 Da, a molecular formula of C19H28O3, and its chemical structure is 3alpha,11beta-dihydroxyandrost-4-en-17-one.
authors.affiliation: Biochemical Research Laboratory, Eiken Chemical Co., Ltd., Tochigi 329-0114, Japan.
authors.forename: Jihei
authors.initials: J
authors.lastname: Iwata
authors.forename: Akio
authors.initials: A
authors.lastname: Kinumaki
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Morita
authors.forename: Keigo
authors.initials: K
authors.lastname: Yasuda
mesh_terms: D015068:17-Ketosteroids / Q000737:chemistry* / Q000652:urine*; D002851:Chromatography, High Pressure Liquid; D003480:Cushing Syndrome / Q000652:urine*; D020719:Glucuronides / Q000378:metabolism; D006801:Humans; D006868:Hydrolysis; D009682:Magnetic Resonance Spectroscopy / Q000295:instrumentation; D008970:Molecular Weight
chemical_list: D015068:17-Ketosteroids; D020719:Glucuronides