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Background and Objective: Nonalcoholic fatty liver disease is the most common cause of liver disease worldwide and it is defined as a disorder of excess fat accumulation in the liver. This study was done to determine the prevalence of fatty liver among overweight, obese and normal children.
Methods: This historical cohort study was conducted on 90 children ages 5 to 13 years old in Taleghani pediatric theching hospital in Gorgan, north of Iran during 2014. Subjects according to Body Mass Index (BMI) classified into obese (95%>BMI), over weight (85-95% BMI) and normal (5-85% BMI). Childern were matched for age and sex. Liver enzymes (ALT Alanine aminotransferase and AST (Aspartate aminotransferase) and lipid profile includingTriglyceride: TG (High Density Lipoprotein: HDL and (Low Density Lipoprotein: LDL were measured and fatty liver evaluated based on sonographic parameters by a radiologist who didnot know children's BMI.
Results: The prevalence of fatty liver was 23.3% in obese children that was non- significantly higher than normal (16.7%) and over weight (16.7%) children. The prevalence of fatty liver was not significantly different between two sexes. AST was significantly higher in children with normal BMI in compared to obese and over weight children (P<0.05). The highest and lowest level of cholesterol was seen in obese and normal children (P<0.05).
Conclusion: This study showed that the prevalence of fatty liver non-significantly was higher in obese children in comparision with normal and over weight children.

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Background and Objective: Nonalcoholic fatty liver disease (NAFLD) is one of the most common chronic hepatic diseases which may be associated with cardiovascular disease. This study aimed to consider the effect of combined therapy with resveratrol supplementation and interval exercise training on heart cells apoptosis in rats with NAFLD using TUNEL assay.
Methods: This experimental study was done on 35 Wistar rats. Animals were randomly allocated into five groups including control (healthy) and four NAFLD groups, including patient, resveratrol, interval exercise, and resveratrol + interval exercise. A TUNEL assay kit was applied for the detection of apoptosis in heart tissue.
Results: The patient group had significantly higher percentage of heart apoptotic cells (24.38±0.69%) compared to the other groups (P<0.05), while the resveratrol + interval exercise (9.02±0.49%) and resveratrol (9.47±0.83%) groups showed significantly lower mean levels of heart apoptotic cells compared to the patient and interval exercise (P<0.05) groups. There was no significant difference in mean of apoptotic cells between resveratrol and resveratrol + interval exercise groups. The mean of apoptotic cells in interval exercise group was 11.39±0.28%.
Conclusion: Nonalcoholic fatty liver disease is considerably associated with heart cells apoptosis. Resveratrol supplementation especially combined with interval exercise significantly reduces apoptotic cells in heart tissue.