6533b7d9fe1ef96bd126cdad
RESEARCH PRODUCT
New molecular aspects of regulation of mitochondrial activity by fenofibrate and fasting
Chantal Wrutniak-cabelloGérard CabelloLaetitia DauryAnne RodierFrançois CasasPierrick RochardThierry PineauMichel Dauçasubject
[SDV]Life Sciences [q-bio]Receptors Cytoplasmic and NuclearPeroxisome proliferator-activated receptorMitochondria LiverMitochondrionBiochemistryMice0302 clinical medicineFenofibrateStructural BiologyBIOLOGIE CELLULAIRECitrate synthaseFibrateReceptorComputingMilieux_MISCELLANEOUSMice Knockoutchemistry.chemical_classification0303 health sciencesFenofibratebiologyElectron Transport Complex IIFastingPeroxisomeDNA-Binding ProteinsSuccinate Dehydrogenase[SDV] Life Sciences [q-bio]OxidoreductasesDimerizationmedicine.drugPeroxisome proliferator activated receptormedicine.medical_specialtyBiophysicsCitrate (si)-Synthase[INFO] Computer Science [cs]Mitochondrial T3 receptorElectron Transport Complex IV03 medical and health sciencesMultienzyme ComplexesInternal medicineGeneticsmedicineAnimalsCytochrome c oxidase[INFO]Computer Science [cs]MitochondrionMolecular BiologyCrosses Genetic030304 developmental biologyOrganellesLipid metabolismCell BiologyMice Inbred C57BLEndocrinologychemistrybiology.protein030217 neurology & neurosurgeryTranscription Factorsdescription
Abstract Fenofibrate and fasting are known to regulate several genes involved in lipid metabolism in a similar way. In this study measuring several mitochondrial enzyme activities, we demonstrate that, in contrast to citrate synthase and complex II, cytochrome c oxidase (COX) is a specific target of these two treatments. In mouse liver organelles, Western blot experiments indicated that mitochondrial levels of p43, a mitochondrial T3 receptor, and mitochondrial peroxisome proliferator activated receptor (mt-PPAR), previously described as a dimeric partner of p43 in the organelle, are increased by both fenofibrate and fasting. In addition, in PPARα-deficient mice, this influence was abolished for mt-PPAR but not for p43, whereas the increase in COX activity was not altered. These data indicate that: (1) PPARα is involved in specific regulation of mt-PPAR expression by both treatments; (2) fenofibrate and fasting regulate the mitochondrial levels of p43 and thus affect the efficiency of the direct T3 mitochondrial pathway.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2000-01-01 |