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Regulation of fatty acid transport protein and mitochondrial and peroxisomal beta-oxidation gene expression by fatty acids in developing rats.
Pediatr Res. 2000 Nov; 48(5):691-6.PR

Abstract

Regulation of genes involved in fatty acid (FA) utilization in heart and liver of weanling rats was investigated in response to variations in dietary lipid content and to changes in intracellular FA homeostasis induced by etomoxir, a blocker of FA import into mitochondria. Northern-blot analyses were performed using cDNA probes specific for FA transport protein, a cell membrane FA transporter; long-chain- and medium-chain acyl-CoA dehydrogenases, which catalyze the first step of mitochondrial FA beta-oxidation; and acyl-CoA oxidase, a peroxisomal FA beta-oxidation marker. High-fat feeding from postnatal d 21 to 28 resulted in a coordinate increase (58 to 136%) in mRNA abundance of all genes in heart. In liver, diet-induced changes in mitochondrial and peroxisomal beta-oxidation enzyme mRNAs (from 52 to 79%) occurred with no change in FA transport protein gene expression. In both tissues, the increases in mRNA levels went together with parallel increases in enzyme activity. Changes in FA homeostasis resulting from etomoxir administration led to a marked stimulation (76 to 180%) in cardiac expression of all genes together with parallel increases in enzyme activities. In the liver, in contrast, etomoxir stimulated the expression of acyl-CoA oxidase gene only. Feeding rats a low-fat diet containing 0.5% clofibrate, a ligand of peroxisome proliferator-activated receptor alpha, resulted in similar inductions of beta-oxidation enzyme genes in both tissues, whereas up-regulation of FA transport protein gene was restricted to heart. Altogether, these data suggest that changes in FA homeostasis in immature organs resulting either from high-fat diet or beta-oxidation blockade can efficiently be transduced to the level of gene expression, resulting in tissue-specific adaptations in various FA-using enzymes and proteins.

Authors+Show Affiliations

INSERM U319, Université Paris 7, Denis Diderot, 75251 Paris cedex 05, France.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

11044493

Citation

Ouali, F, et al. "Regulation of Fatty Acid Transport Protein and Mitochondrial and Peroxisomal Beta-oxidation Gene Expression By Fatty Acids in Developing Rats." Pediatric Research, vol. 48, no. 5, 2000, pp. 691-6.
Ouali F, Djouadi F, Merlet-Bénichou C, et al. Regulation of fatty acid transport protein and mitochondrial and peroxisomal beta-oxidation gene expression by fatty acids in developing rats. Pediatr Res. 2000;48(5):691-6.
Ouali, F., Djouadi, F., Merlet-Bénichou, C., Riveau, B., & Bastin, J. (2000). Regulation of fatty acid transport protein and mitochondrial and peroxisomal beta-oxidation gene expression by fatty acids in developing rats. Pediatric Research, 48(5), 691-6.
Ouali F, et al. Regulation of Fatty Acid Transport Protein and Mitochondrial and Peroxisomal Beta-oxidation Gene Expression By Fatty Acids in Developing Rats. Pediatr Res. 2000;48(5):691-6. PubMed PMID: 11044493.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Regulation of fatty acid transport protein and mitochondrial and peroxisomal beta-oxidation gene expression by fatty acids in developing rats. AU - Ouali,F, AU - Djouadi,F, AU - Merlet-Bénichou,C, AU - Riveau,B, AU - Bastin,J, PY - 2000/10/25/pubmed PY - 2001/2/28/medline PY - 2000/10/25/entrez SP - 691 EP - 6 JF - Pediatric research JO - Pediatr Res VL - 48 IS - 5 N2 - Regulation of genes involved in fatty acid (FA) utilization in heart and liver of weanling rats was investigated in response to variations in dietary lipid content and to changes in intracellular FA homeostasis induced by etomoxir, a blocker of FA import into mitochondria. Northern-blot analyses were performed using cDNA probes specific for FA transport protein, a cell membrane FA transporter; long-chain- and medium-chain acyl-CoA dehydrogenases, which catalyze the first step of mitochondrial FA beta-oxidation; and acyl-CoA oxidase, a peroxisomal FA beta-oxidation marker. High-fat feeding from postnatal d 21 to 28 resulted in a coordinate increase (58 to 136%) in mRNA abundance of all genes in heart. In liver, diet-induced changes in mitochondrial and peroxisomal beta-oxidation enzyme mRNAs (from 52 to 79%) occurred with no change in FA transport protein gene expression. In both tissues, the increases in mRNA levels went together with parallel increases in enzyme activity. Changes in FA homeostasis resulting from etomoxir administration led to a marked stimulation (76 to 180%) in cardiac expression of all genes together with parallel increases in enzyme activities. In the liver, in contrast, etomoxir stimulated the expression of acyl-CoA oxidase gene only. Feeding rats a low-fat diet containing 0.5% clofibrate, a ligand of peroxisome proliferator-activated receptor alpha, resulted in similar inductions of beta-oxidation enzyme genes in both tissues, whereas up-regulation of FA transport protein gene was restricted to heart. Altogether, these data suggest that changes in FA homeostasis in immature organs resulting either from high-fat diet or beta-oxidation blockade can efficiently be transduced to the level of gene expression, resulting in tissue-specific adaptations in various FA-using enzymes and proteins. SN - 0031-3998 UR - https://www.unboundmedicine.com/medline/citation/11044493/Regulation_of_fatty_acid_transport_protein_and_mitochondrial_and_peroxisomal_beta_oxidation_gene_expression_by_fatty_acids_in_developing_rats_ L2 - https://doi.org/10.1203/00006450-200011000-00023 DB - PRIME DP - Unbound Medicine ER -