Maternal diets enriched in olive oil regulate lipid metabolism and levels of PPARs and their coactivators in the fetal liver in a rat model of gestational diabetes mellitus |
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| Institution: | 1. Department of Neonatology, Dr Sami Ulus Maternity and Children Research and Training Hospital, University of Health Sciences, Ankara, Turkey;2. Department of Neonatology, Memorial Dicle Hospital, Diyarbak?r, Turkey;3. Intergen Genetics Center, Ankara, Turkey;4. Department of Obstetrics and Gynecology, Dr Sami Ulus Maternity and Children Research and Training Hospital, University of Health Sciences, Ankara, Turkey;1. Lipidomics and Nutrition Research Centre, Faculty of Life Sciences and Computing, London Metropolitan University, London, UK;2. Newham University Hospital National Health Service Trust, London, UK;3. Academic Department of Women''s Health, Queen Mary''s School of Medicine, University of London, London, UK;1. Laboratory of Reproduction and Metabolism, CEFYBO. CONICET School of Medicine, University of Buenos Aires, Argentina;2. Section of Neonatology, Department of Pediatrics Department of OB/GYN, University of Colorado Denver Anschutz Medical Campus, Aurora, CO 80045, USA;3. Division of Reproductive Sciences, Department of OB/GYN, University of Colorado Denver Anschutz Medical Campus, Aurora, CO 80045, USA;1. Institute of Nutrition and Food Technology (INTA), University of Chile, Santiago, Chile;2. Department of Pediatrics, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile;3. Division of Obstetrics and Gynecology, Faculty of Medicine, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile;4. Health Area of Puente Alto County, Santiago, Chile;5. Center for Research and Innovation in Maternal-Fetal Medicine (CIMAF), Department of Obstetrics and Gynecology, Sótero del Río Hospital, Santiago, Chile |
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| Abstract: | In a rat model of gestational diabetes mellitus (GDM) programmed in the offspring of neonatal streptozotocin-induced (nSTZ) diabetic rats, lipids are accumulated in the fetal liver in a sex-dependent way. Here, we evaluated whether maternal diets enriched in olive oil in rats that will develop GDM ameliorate lipid metabolic impairments in the fetal livers. Pregnant offspring of control and nSTZ diabetic rats (F0) were fed a 6% olive oil-supplemented diet throughout the F1 gestation. We evaluated maternal metabolic parameters as well as lipid content, expression of lipid metabolizing enzymes and protein expression of PLIN2, PPARs and PPAR coactivators in the fetal livers. The offspring of nSTZ diabetic rats developed GDM regardless of the maternal treatment. Hypertriglyceridemia in GDM rats was prevented by the olive oil-enriched maternal treatment. In the livers of male fetuses of GDM rats, the maternal olive oil-supplemented diet prevented lipid overaccumulation and prevented the increase in PPARγ and PPARδ levels. In the livers of female fetuses of GDM rats, the maternal olive oil supplementation prevented the increase in PPARδ levels and the reduction in PGC1α levels, but did not prevent the reduced lipid content. Control and GDM rats showed a reduction of lipid metabolic enzymes in the fetal livers, which was associated with reduced levels of the PPAR coactivators PGC-1α and SRC-1 in males and of SRC-1 in females. These results suggest powerful effects of a maternal olive oil-supplemented diet in the fetal liver, possibly providing benefits in the fetuses and offspring from GDM rats. |
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