RESUMO
Introduction: Liver fibrosis represent a worldwide challenge of clinical importance, results from chronic damage of liver, and evidenced by build up of excessive extracellular matrix proteins.. The present study was carried out to evaluate the antifibrogenic effect of grape seed extract [GSE] against hepatic fibrosis induced by CCl4 in mice
Experimental Design: forty adult male albino mice were divided into four equal groups; first [control] in which mice were injected IP with olive oil as vehicle. In the second group [GSE] mice were received GSE orally at a dose of 200mg/kg/day for 8 weeks while in the third group [CCl4] mice were injected IP with CCl4 [0.4ml/kg / twice weekly] for 8 weeks . In the fourth [GSE+ CCl4] group mice were injected IP with CCl4 and co-treated with GSE orally as in previous treated-groups. At the end of the experiment, animals were sacrificed and blood samples and liver tissue specimens were collected
Results: the examined liver of CCl4-intoxicated group revealed marked hepatic fibrotic lesions confirmed by Masson's trichrome stain and associated with the presence of intensely stained alpha -SMA-positive hepatic stellate cells [HSCs] in entire of the hepatic lobules and in the vicinity of bridging fibrotic septa. Hepatic degeneration and necrosis were also seen. This hepatic damage was associated with significant increases in AST and ALT activities with low albumin levels and hypoproteinemia. Co-administration of GSE with CCl4 improved the microscopic picture of liver where scanty fibrotic lesions and mild degeneration of some hepatic cells were recorded. Less intensely stained alpha -SMA-immunopositive cells were observed. Serum AST, ALT, albumin and total protein values were more or less within the ranges of these parameters in the control non-intoxicated group
Conclusion: GSE has potent antifibrogenic effect on CCl4-induced hepatic fibrosis by inhibiting HSCs activation, decreasing collagen synthesis and improving hepatic regenerative capability through its powerful antioxidant and anti-inflammatory properties
RESUMO
The present study was carried out to evaluate the effect of Sitagliptin [Januvia] on the liver of experimentally induced diabetes in albino rats. Fifteen adult male albino rats were used and divided into three equal groups. The first group was considered as a control group. In the second group experimental induction of diabetes was performed by intraperitoneal injection of alloxan and left as a diabetic control for three weeks. The third group was consisted of rats of experimentally induced diabetes and treated by a daily dose of Sitagliptin [Januvia] as oral anti diabetic therapy for three weeks. Two main parameters were performed; the first was microscopic and histochemical studies on the liver tissue while the second was laboratory evaluation of some liver functions. The hepatic tissue was affected by the experimental induction of diabetes in the form of cellular infiltration, hepatic cell cords disarrangement and vascular congestion after three weeks of induction. The fibrous elements as well as mucopolysaccharides contents were greatly reduced. Histochemical changes in the liver enzymes showed mild decrease. Liver function tests showed mild changes. Diabetic changes were gradually returned back to its normal state after the use of daily oral dose of Sitagliptin. The antidiabetic drug [Sitagliptin] could be considered a good therapy in limiting the risk of diabetes Mellitus on liver tissue