title: Identification of 7 alpha-hydroxy-3-oxo-4-cholestenoic acid in chronic subdural hematoma.
abstract: We detected a novel kind of bile acid in the content of chronic subdural hematoma. This substance was specifically found in chronic subdural hematoma, and not in subdural hygroma, which is pathologically similar except for the lack of capsular membrane. The compound was identified as 7 alpha-hydroxy-3-oxo-4-cholestenoic acid by high performance liquid chromatography, gas chromatography-mass spectrometry, and nuclear magnetic resonance spectrometry. The structure was confirmed by the comparison with the chemically synthesized compound. The average contents in chronic subdural hematoma were 658.09 +/- 137.53 ng/ml, while those in normal human plasma were 126.27 +/- 17.73 ng/ml. It was not detected in normal cerebrospinal fluid. The higher level in chronic subdural hematoma than human plasma strongly suggests the local, extrahepatic production of this type of C27 bile acids.
authors.affiliation: Department of Neurosurgery, Faculty of Medicine, University of Tokyo, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Nagata
authors.forename: K
authors.initials: K
authors.lastname: Takakura
authors.forename: T
authors.initials: T
authors.lastname: Asano
authors.forename: Y
authors.initials: Y
authors.lastname: Seyama
authors.forename: H
authors.initials: H
authors.lastname: Hirota
authors.forename: N
authors.initials: N
authors.lastname: Shigematsu
authors.forename: I
authors.initials: I
authors.lastname: Shima
authors.forename: T
authors.initials: T
authors.lastname: Kasama
authors.forename: T
authors.initials: T
authors.lastname: Shimizu
mesh_terms: D001647:Bile Acids and Salts / Q000097:blood / Q000134:cerebrospinal fluid / Q000737:chemistry / Q000378:metabolism*; D002783:Cholestenones / Q000097:blood / Q000134:cerebrospinal fluid / Q000737:chemistry / Q000378:metabolism*; D002851:Chromatography, High Pressure Liquid; D002908:Chronic Disease; D008401:Gas Chromatography-Mass Spectrometry; D006408:Hematoma, Subdural / Q000209:etiology / Q000378:metabolism*; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D016339:Spectrometry, Mass, Fast Atom Bombardment; D013056:Spectrophotometry, Ultraviolet
chemical_list: D001647:Bile Acids and Salts; D002783:Cholestenones; C056891:7 alpha-hydroxy-3-oxo-4-cholestenoic acid