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The effects of periconceptional maternal alcohol intake and a postnatal high-fat diet on obesity and liver disease in male and female rat offspring.
American Journal of Physiology. Endocrinology and Metabolism 2017 October 32
The effects of maternal alcohol consumption around the time of conception on offspring are largely unknown and difficult to determine in a human population. This study utilized a rodent model to examine if periconceptional alcohol (PC:EtOH), alone or in combination with a postnatal high-fat diet (HFD) resulted in obesity and liver dysfunction. Sprague-Dawley rats were fed a control or ethanol-containing liquid diet (12.5% EtOH v/v) from 4 days prior to mating until 4 days of gestation (n=12/group). A subset of offspring was fed a HFD between 3-8 months of age. In males, PC:EtOH and HFD increased total body fat mass (PPC:EtOH <0.05; PHFD <0.0001), whereas in females, only HFD increased fat mass (PHFD <0.0001). PC:EtOH increased microvesicular liver steatosis in male, but not female offspring. Plasma triglycerides, HDL and cholesterol were increased in PC:EtOH-exposed males (PPC:EtOH <0.05); and LDL, cholesterol and leptin in PC:EtOH-exposed females (PPC:EtOH <0.05). mRNA levels of Tnf-α and Lep in visceral adipose tissue were increased by PC:EtOH in both sexes (PPC:EtOH <0.05) and IL-6 mRNA was increased in males (PPC:EtOH<0.05). This was associated with reduced miR-26a expression, a known regulator of IL6 and TNFα. Alcohol exposure around conception increases obesity risk, alters plasma lipid and leptin profiles and induces liver steatosis in a sex-specific manner. These programmed phenotypes were similar to those caused by a postnatal HFD, particularly in male offspring. These results have implications for the health of offspring whose mothers consumed alcohol around the time of conception.
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