Effect of physical training on liver expression of activin A and follistatin in a nonalcoholic fatty liver disease model in rats

Nonalcoholic fatty liver disease (NAFLD) is characterized by fat accumulation in the liver and is associated with obesity and insulin resistance. Activin A is a member of the transforming growth factor beta (TGF)-β superfamily and inhibits hepatocyte growth. Follistatin antagonizes the biological actions of activin. Exercise is an important therapeutic strategy to reduce the metabolic effects of obesity. We evaluated the pattern of activin A and follistatin liver expression in obese rats subjected to swimming exercise. Control rats (C) and high-fat (HF) diet-fed rats were randomly assigned to a swimming training group (C-Swim and HF-Swim) or a sedentary group (C-Sed and HF-Sed). Activin βA subunit mRNA expression was significantly higher in HF-Swim than in HF-Sed rats. Follistatin mRNA expression was significantly lower in C-Swim and HF-Swim than in either C-Sed or HF-Sed animals. There was no evidence of steatosis or inflammation in C rats. In contrast, in HF animals the severity of steatosis ranged from grade 1 to grade 3. The extent of liver parenchyma damage was less in HF-Swim animals, with the severity of steatosis ranging from grade 0 to grade 1. These data showed that exercise may reduce the deleterious effects of a high-fat diet on the liver, suggesting that the local expression of activin-follistatin may be involved.

Cardiorespiratory fitness, pulmonary function and C-reactive protein levels in nonsmoking individuals with diabetes

The objective of this study was to evaluate cardiorespiratory fitness and pulmonary function and the relationship with metabolic variables and C-reactive protein (CRP) plasma levels in individuals with diabetes mellitus (DM). Nineteen men with diabetes and 19 age- and gender-matched control subjects were studied. All individuals were given incremental cardiopulmonary exercise and pulmonary function tests. In the exercise test, maximal workload (158.3±22.3 vs 135.1±25.2, P=0.005), peak heart rate (HRpeak: 149±12 vs 139±10, P=0.009), peak oxygen uptake (VO2peak: 24.2±3.2 vs 18.9±2.8, P<0.001), and anaerobic threshold (VO2VT: 14.1±3.4 vs 12.2±2.2, P=0.04) were significantly lower in individuals with diabetes than in control subjects. Pulmonary function test parameters, blood pressure, lipid profile (triglycerides, HDL, LDL, and total cholesterol), and CRP plasma levels were not different in control subjects and individuals with DM. No correlations were observed between hemoglobin A1C (HbA1c), CRP and pulmonary function test and cardiopulmonary exercise test performance. In conclusion, the results demonstrate that nonsmoking individuals with DM have decreased cardiorespiratory fitness that is not correlated with resting pulmonary function parameters, HbA1c, and CRP plasma levels.

[Anti HCV in hemodialyzed patients: reduction of the prevalence and association with epidemiological variables]. / Anti HCV en pacientes hemodializados: descenso de la prevalencia y asociación con variables epidemiológicas.

In order to establish the present prevalence of HCV in hemodialyzed patients (HD) from the city of La Plata, and to know the association between the prevalence and different variables, we have studied 217 hemodialyzed patients belonged to the Hemodialysis Unit of a Public Hospital and other 7 private Units. Serological reactivity to Anti HCV and Anti HBc IgG were investigated in all of them, as well as age, sex, number of transfusions, the time under dialysis treatment, the use of erythropoietin and hepatitis episodes were taken into account. We have found a prevalence of Anti HCV of 18.4% which was significantly superior to the blood donors' prevalence (P < 0.01) and significantly inferior to the one found in 1993 in HD patients of the same city (p = 0.002). We have found an association between the presence of Anti HCV and transfusions exposure, as well as more hemodialysis time. Our results may agree with the ones that suggest the aminotransferases are not good markers for hepatocellular injuries in Anti HCV (R) HD patients.

Anti HCV en pacientes hemodializados: descenso de la prevalencia y asociación con variables epidemiológicas / Anti HCV in hemodialyzed patients: reduction of the prevalence and association with epidemiological variables

Para estabelecer la prevalencia actual de infección por HCV en pacientes hemodializados (HD) de la ciudad de La Plata y determinar su asociación con diferentes variables se estudiaron 217 pacientes con Insuficiencia Renal Crónica de una Unidad de Hemodiálisis de un Htal público y de 7 Unidades del medio asistencial privado. En la totalidad de los pacientes se investigó la presencia sérica de anti-HCV y de anti-HBc y se valoró la edad, sexo, número de transfusiones, antig³edad del tratamiento hemodialítico, uso de eritropoyetina y episodios de hepatitis. Se halló una prevalencia de anti-HCV del 18,4 por ciento significativamente superior a la de los donantes de sangre (P<0,01) y significativamente enor a la hallada en pacientes HD de la misma ciudad en 1993 (P=0,002). También se encontró que la presencia de anti-HCV se asocia con el antecedente de haber recibido transfusiones y con mayor tiempo de ento hemodialítico. Nuestro resultados parecen coincidir con los que sugieren que las aminotransferasas en pacientes HD anti HCV son un mal marcador de lesión hepatocelular. (AU)

Anti HCV en pacientes hemodializados: descenso de la prevalencia y asociación con variables epidemiológicas / Anti HCV in hemodialyzed patients: reduction of the prevalence and association with epidemiological variables

Para estabelecer la prevalencia actual de infección por HCV en pacientes hemodializados (HD) de la ciudad de La Plata y determinar su asociación con diferentes variables se estudiaron 217 pacientes con Insuficiencia Renal Crónica de una Unidad de Hemodiálisis de un Htal público y de 7 Unidades del medio asistencial privado. En la totalidad de los pacientes se investigó la presencia sérica de anti-HCV y de anti-HBc y se valoró la edad, sexo, número de transfusiones, antigüedad del tratamiento hemodialítico, uso de eritropoyetina y episodios de hepatitis. Se halló una prevalencia de anti-HCV del 18,4 por ciento significativamente superior a la de los donantes de sangre (P<0,01) y significativamente enor a la hallada en pacientes HD de la misma ciudad en 1993 (P=0,002). También se encontró que la presencia de anti-HCV se asocia con el antecedente de haber recibido transfusiones y con mayor tiempo de ento hemodialítico. Nuestro resultados parecen coincidir con los que sugieren que las aminotransferasas en pacientes HD anti HCV © son un mal marcador de lesión hepatocelular.