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Abstract Title:

The reduced form of coenzyme Q10 decreases the expression of lipopolysaccharide-sensitive genes in human THP-1 cells.

Abstract Source:

J Med Food. 2011 Apr;14(4):391-7. Epub 2011 Mar 3. PMID: 21370964

Abstract Author(s):

Constance Schmelzer, Christine Kohl, Gerald Rimbach, Frank Döring

Article Affiliation:

1 Molecular Prevention, Institute of Human Nutrition and Food Science, Christian-Albrechts-University of Kiel , Kiel, Germany.

Abstract:

Abstract Monocytes are key players in inflammatory processes that are triggered by lipopolysaccharide (LPS), the major outer membrane component of Gram-negative bacteria. The present study in human monocytic THP-1 cells was designed in order to identify LPS-inducible genes that are down-regulated by the reduced form of coenzyme Q(10) (ubiquinol, Q(10)H(2)). For this purpose, THP-1 cells were incubated with 10 μM Q(10)H(2) for 24 hours. Subsequently, cells were stimulated for 4 hours with 1 μg/mL LPS, and the resulting gene expression levels were determined using microarrays. Fourteen LPS-inducible genes were identified to be significantly (P ≤ .05) down-regulated by Q(10)H(2) pretreatment between a factor of 1.32 and 1.65. The strongest effect of Q(10)H(2) incubation was found for the nuclear receptor coactivator 2 gene (NCOA2). Gene ontology terms revealed for the Q(10)H(2)-sensitive genes an involvement in, e.g., signal transduction processes (centaurin, delta 1; NCOA2; pleckstrin and Sec7 domain containing 3; protein phosphatase 2, regulatory subunit B [B56], γ isoform), transcriptional regulation (NCOA2; POU domain, class 2, transcription factor 1; ETS variant gene 3), and cell proliferation pathways (hypothetical protein FLJ36090, epidermal growth factor receptor pathway substrate 15). In conclusion, we provide evidence in THP-1 cells that Q(10)H(2) modulates LPS-induced gene expression.

Study Type : In Vitro Study

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Sayer Ji
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