Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0019204 (hepatocellular carcinoma)
 71,386 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Mitochondrial aconitase (mACON) is the key enzyme for the citrate oxidation in the mitochondrial Krebs cycle. Cholesterol treatment (10 microg/ml of cholesterol and 1 microg/ml of 25-hydroxycholesterol) for 24 h stimulates mACON enzymatic activity in human prostatic carcinoma cells (PC-3) and hepatoma cells (HepG2). Mevastatin, a cholesterol synthesis antagonist, blocked the effect of cholesterol treatment on mACON. The cholesterol treatment stimulated mACON enzymatic activity, which enhanced the citrate utility but decreased intracellular ATP levels in PC-3 cells. The immunoblotting and transient gene expression assays demonstrated that cholesterol treatment enhances the gene expression of mACON. Mutation of the putative sterol response element (SRE) from GACGCCCCACT to GACGCCCATAT abolished the stimulating effects of cholesterol on the promoter activity of mACON gene. The results suggest that cholesterol treatment induces the mACON gene expression through the SRE signal transduction pathway. Our study demonstrated the deregulation of cholesterol on the citrate metabolism.
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PMID:Cholesterol modulation of the expression of mitochondrial aconitase in human prostatic carcinoma cells. 1620 54