7α-Hydroxy-4-cholesten-3-one (C4) is known as a marker for the cholesterol 7α-hydroxylase activity. It plays an important role in bile acid metabolism.[1]
Application
C4 may be used as a reference standard for the determination of C4 in:
Human serum by ultra-high performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS) with electrospray ionization source (ESI)[2] as well as LC-MS.[1]
Rat and monkey plasma by LC-ESI-MS/MS working on multiple reaction monitoring (MRM) mode of detection.[3]
Peripheral blood plasma by solid-phase extraction (SPE) and HPLC.[4]
Biochem/physiol Actions
7a-Hydroxycholestene-3-one, a metabolite in bile acid synthesis, is derived from 7a-hydroxycholesterol and can be further metabolized to 7a,12a,-dihydroxycholest-4-en-3-one. Analysis of 7a-Hydroxycholestene-3-one (HCO) in serum may serve as a novel, simple, and sensitive method for the detection of bile acid malabsorption in patients with chronic diarrhea of unknown origin.
European journal of clinical investigation, 28(4), 324-328 (1998-06-06)
HMG-CoA reductase inhibitors are now the therapy of choice in the treatment of hypercholesterolaemia. The effects of long-term treatment with these substances on plasma lipoproteins, cholesterol metabolism and biliary secretion of lipids have been extensively studied in humans. Much less
Nonalcoholic steatohepatitis (NASH) is a multifactorial disease involving different contributing mechanisms, with no approved therapies so far. Tropifexor (TXR), a farnesoid X receptor agonist, and cenicriviroc (CVC), a chemokine receptor types 2/5 antagonist, target the steatotic, inflammatory, and/or fibrotic pathways
LC-MS/MS quantification of 7?-hydroxy-4-cholesten-3-one (C4) in rat and monkey plasma.
Kang L, et al.
Journal of Chromatography. B, Biomedical Sciences and Applications, 1064, 49-55 (2017)
A UHPLC-MS/MS method for the quantification of 7?-hydroxy-4-cholesten-3-one to assist in diagnosis of bile acid malabsorption.
Prost JC, et al.
Clinical mass spectrometry, 3, 1-6 (2017)
Comparison of simple extraction procedures in liquid chromatography-mass spectrometry based determination of serum 7?-hydroxy-4-cholesten-3-one, a surrogate marker of bile acid synthesis.
Marek L, et al.
Journal of Chromatography. B, Biomedical Sciences and Applications, 1033, 317-320 (2016)
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