Combined gas chromatographic/mass spectrometric analysis of cholesterol precursors and plant sterols in cultured cells

Jure Acimovic, Anita Lövgren-Sandblom, Katalin Monostory, Damjana Rozman, Marko Golicnik, Dieter Lutjohann, Ingemar Björkhem

Research output: Contribution to journalArticle

57 Citations (Scopus)

Abstract

We developed a powerful gas chromatographic/mass spectrometric method allowing quantitative analysis of 11 structurally similar cholesterol precursors and plant sterols (squalene, desmosterol, 7-dehydrocholesterol, lathosterol, zymosterol, dihydro-lanosterol, lanosterol, FF-MAS, T-MAS, campesterol, sitosterol) from cultured human hepatocytes in a single chromatographic run. Deuterium labelled cholesterol, sitosterol and lathosterol were used as internal standards. Care was taken to select ions for the detection that gave the most appropriate discrimination in the assay. Replicate analyses gave a coefficient of variation less than 6%. Recovery experiments were satisfactory for 7-dehydrocholesterol, campesterol, desmosterol, lathosterol, zymosterol and cholesterol with less than 7% difference between expected and found levels. For other sterols, the difference between expected and found levels varied between 10 and 16%. It is concluded that this method is suitable for studies on the effect of different inhibitors and stimulators of cholesterol synthesis in cultured cells. Additionally, the method is relevant also for clinical applications since abnormally increased late cholesterol intermediates in patients are representations of the inherited disorders linked to different enzyme defects in the post-squalene cholesterol biosynthesis.

Original languageEnglish
Pages (from-to)2081-2086
Number of pages6
JournalJournal of Chromatography B: Analytical Technologies in the Biomedical and Life Sciences
Volume877
Issue number22
DOIs
Publication statusPublished - Jul 15 2009

Keywords

  • Cholesterol biosynthesis intermediates
  • Gas chromatography/mass spectrometry
  • Human hepatocytes

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry
  • Clinical Biochemistry
  • Cell Biology

Fingerprint Dive into the research topics of 'Combined gas chromatographic/mass spectrometric analysis of cholesterol precursors and plant sterols in cultured cells'. Together they form a unique fingerprint.

  • Cite this