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• W2282900512 abstract "A low sodium diet was given to pregnant rats during the last week of gestation. This diet diminished the maternal expansion of blood volume, the uterine arteries diameter, and placental weight, when compared to their controls. Together, these results suggest a lower placenta perfusion and a decreased output of nutrients to the fetus. The offspring of these pregnant rats were born with an intra-uterine growth retardation (IUGR). The fetal heart utilizes glucose through glycolysis as the major cardiac energy substrate. At birth, the principal source of energy switches to the oxidation of fatty acids, through β-oxydation. We hypothesized that within our IUGR model, the fetal heart could respond to a diminished nutritional intake due to the maternal input when a decreased cardiac energy metabolism was present. The pregnant rats of both groups (controls and on the low sodium diet) were sacrificed on day 22 of a 23 day gestation. The fetal hearts were then analyzed looking for signs of the limiting proteins glycolysis and β-oxidation. The GLUT1, GLUT4, HK1, HK2, CPT2, CPT1β, cytochrome c, PFK1, PKM1/2 proteins obtained through a Western immunoblot method were similar between the hearts of the IUGR and their control fetuses, whether they were male or female. The protein expression of CPT1α was lower only in female IUGR fetal hearts. There was no significant difference between the groups with respect to the enzymatic activity of PKM1/2. Our results suggest that the metabolic profile changes with regards to the fetus gender and could affect the fetal cardiac metabolism, due to a lower maternal blood flow caused by a sodium controlled diet, by diminishing its lipid metabolism and sparing glucose metabolism. To characterize the energy metabolism, the enzymatic activity of the other principal limiting enzymes glycolysis (HK1, HK2, PFK1), the intra-mitochondrial flux of acyl CoA through the CPTs and the total quantity of acetyl CoA must also be analyzed." @default.
• W2282900512 created "2016-06-24" @default.
• W2282900512 creator A5033401840 @default.
• W2282900512 date "2011-05-05" @default.
• W2282900512 modified "2023-09-23" @default.
• W2282900512 title "Métabolisme énergétique cardiaque fœtal dans un modèle de restriction de croissance intra-utérine chez le rat" @default.
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