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Probucol ameliorates renal and metabolic sequelae of primary CoQ deficiency in Pdss2 mutant mice

ABSTRACT: To discern whether the same transcriptional signature of mitochondrial dysfunction previously reported in B6.Alb/cre,Pdss2loxP/loxP liver-conditional knockout mice (Peng, Falk et al. PLoS Genetics, 2008 [PMID 18437205]) was present regardless of Pdss2 mutation type, as well as to assess whether pharmacologic therapies modulate expression of particular pathways, genome-wide transcriptional profiling was performed in liver from B6.Pdss2(kd/kd) missense mutant mice on standard chow or supplemented long-term with either probucol or CoQ10.

ORGANISM(S): Mus musculus

PROVIDER: GSE27954 | GEO | 2011/06/07

SECONDARY ACCESSION(S): PRJNA137737

REPOSITORIES: GEO

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Project description:Our present study reveals significant decelerating effects on senescence processes in middle-aged SAMP1 mice supplemented for 6 or 14 months with the reduced form (QH2, 500 mg/ kg BW/ day) of coenzyme Q10 (CoQ10). To unravel molecular mechanisms of these CoQ10 effects, a genome-wide transcript profiling in liver, heart, brain and kidney of SAMP1 mice supplemented with the reduced (QH2) or oxidized form of CoQ10 (Q10) was performed. Liver seems to be the main target tissue of CoQ10 intervention, followed by kidney, heart and brain. Stringent evaluation of the resulting data revealed that QH2 has a stronger impact on gene expression than Q10, which was primarily due to differences in the bioavailability. Indeed, we found that QH2 supplementation was more effective than Q10 to increase levels of CoQ10 in the liver of SAMP1 mice (54.92-fold and 30.36-fold, respectively). To identify functional and regulatory connections of the âtop 50â (p < 0.05) up- and down-regulated QH2-sensitive transcripts in liver (fold changes ranging from 21.24 to -6.12), text mining analysis (Genomatix BiblioSphere, GFG level B3) was used. Hereby, we identified 11 QH2-sensitive genes which are regulated by PPAR-Î± and are primarily involved in cholesterol synthesis (e.g. HMGCS1, HMGCL, HMGCR), fat assimilation (FABP5), lipoprotein metabolism (PLTP) and inflammation (STAT-1). Thus, we provide evidence that QH2 is involved in the reduction of fat and cholesterol synthesis via modulation of the PPAR-Î± signalling pathway. These data may explain, at least in part, the observed effects on decelerated age-dependent degeneration processes in QH2-supplemented SAMP1 mice. Whole genome expression profiles were analysed from liver, heart, brain and kidney (each analyzed separately) of SAMP1 mice supplemented with QH2, Q10 or a control diet. From every experimental group, three mice each were sacrificed 6 or 14 months after supplementation, resulting in a total of 72 microarrays.

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Probucol ameliorates renal and metabolic sequelae of primary CoQ deficiency in Pdss2 mutant mice

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