Objective To observe the effect of resveratrol on retinal vasculopathy in diabetic rats. Methods Forty-five Sprague-Dawley male rats were randomly divided into the resveratrol group, treatment control group and the normal control group, 15 rats in each group. Diabetic rat models were induced with streptozotocin injection in resveratrol group and treatment control group. The same volume of sterile saline solution was injected into the rats of the normal control group. The rats of resveratrol group and treatment control group were feed with highfat diet. The rats of resveratrol group received oral gavage of resveratrol (75 mg/kg) twice a day for four months. The same volume of sterile saline solution was given by gavage in rats of treatment control group twice a day for four months. 2 ml femoral vein blood and 50 mu;l aqueous fluid of anterior chamber of the eye from rats of three groups were collected to detect fasting blood glucose, aqueous fluid glucose, cholesterol and triglyceride. The retinal vascular permeability was test by labeling with evans blue. Whole retina was isolated to detect the pericyte number. Total protein was extracted from retina to test the level of vascular endothelial growth factor (VEGF). Results The fasting blood glucose, aqueous fluid glucose, cholesterol and triglyceride in treatment control group were higher than those in normal control group, also higher than those in resveratrol group except cholesterol. The differences among the three groups were statistically significant (F=152.809, 65.230, 3.861, 15.059; P＜0.05). The retinal vascular permeability in treatment control group was higher than that in normal control group, while it in resveratrol group was lower than that in treatment control group. The differences among the three groups was statistically significant (F=11.626,P＜0.05). The pericyte number in treatment control group decreased as compared to normal control group, while it in resveratrol group increased as compared to treatment control group. The differences among the three groups was statistically significant (F=43.284, P＜0.05). The VEGF expression in treatment control group increased as compared to normal control group, while it in resveratrol group decreased as compared to treatment control group. The differences among the three groups was statistically significant (F=14.017, P＜0.05). Conclusion Resveratrol can improve abnormal retinal vasculopathy structure and function, down-regulated level of fasting blood glucose, aqueous fluid glucose, triglyceride and VEGF may be the mechanism.
ObjectiveTo systematically review the combination of entecavir and interferon-α (IFN-α) in treating hepatitis B compared to entecavir alone. MethodsPubMed, EMbase, The Cochrane Library (Issue 12, 2013), Web of Science, CBM, CNKI, WanFang Data and VIP were searched for the randomized controlled trials (RCTs) on entecavir and interferon-α (IFN-α) in treating hepatitis B from inception to December 2013. Two reviewers independently screened literature according to the inclusion and exclusion criteria, extracted data, and assessed the methodological quality of included studies. Then meta-analysis was performed using RevMan 5.2.5. ResultsA total of 7 RCTs were finally included involving 543 cases. The results of meta-analysis revealed that, compared to entecavir alone, 24-week combined therapy was more effective in improving negative conversion rates of serum HBV-DNA (OR=2.93, 95%CI 1.79 to 4.79, P < 0.000 1), conversion rates of HBeAg (OR=2.36, 95%CI 1.35 to 4.14, P=0.003), and recovery rates of ALT (OR=2.73, 95%CI 1.73 to 4.32, P < 0.000 1). No statistical significance was found in terms of side effects. ConclusionCurrent evidence shows that combination of entecavir and IFN-α is more effective than entecavir alone in treating hepatitis B. Due to limited quality and quantity of the included studies, the abovementioned conclusion still needs to be verified by conducting more high quality studies.