Seyama Y, Ichikawa K, Yamakawa T. Quantitative determination of cholestanol in plasma with mass fragmentography. Biochemical diagnosis of cerebrotendinous xanthomatosis.
J Biochem 1976;
80:223-8. [PMID:
794060 DOI:
10.1093/oxfordjournals.jbchem.a131268]
[Citation(s) in RCA: 26] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
A simple, sensitive, and accurate method for determination of cholestanol in plasma is described. In this method a fixed amount of cholestane is added to 1 ml of plasma as an internal standard and steroids are saponified and extracted with n-hexane. The amounts of cholestanol and cholesterol are determined by mass fragmentography by monitoring the intensities of m/e 306, m/e 329, and m/e 372 fragment ions. The relative standard deviation of results for cholestanol was about 6.3%. The cholestanol concentrations in the plasma, erythrocyte stroma, and plasma lipoproteins of three patients with cerebrotendinous xanthomatosis were determined by this method.
Collapse