Renal Protective Effect of Ginkgo biloba and L-carnitine Extracts against Pentylenetetrazol Induced Toxicity, Oxidative Stress, Injury and Proliferation Alternation in Epileptic Rats

Objectives: Ginkgo biloba leaf extract (GBLE) and L-carnitine extract are a commercial product used as a nutraceutic herbal widely. They have antioxidant and reactive oxygen species (ROS) scavenger. This study hypothesized that GB and L-carnitine may have protective effects against pentylenetetrazol (PTZ) induced oxidative damage in kidney in male albino rats. Materials and Methods: A total of 80 male albino rats were equally divided into eight groups (G1, control; G2, GBLE; G3, L-carnitine; G4, Pentylenetetrazole; G5&G6, pre and post treated PTZ with L-carnitine groups respectively; G7&G8, pre and post treated PTZ with GBLE respectively). Results: Serum urea, creatinine, uric acid and cystatin c were significantly increased in PTZ group when compared with control. Also; kidney homogenate MDA and DNA fragmentation were increased when compared with control while, significant decrease in CAT, SOD, GST and TAC in PTZ when compared with control. On other hand pre and post-treatment with L-carnitine and GBLE improved these parameters. Conclusions: The results revealed that; the treatment with L-carnitine improved these parameters more than GBLE and the results of post treatment were better than pre-treatment.

Effects of hypertonic saline solution associated to remote ischemic perconditioning in kidney ischemia/reperfusion injury in rats

Abstract Purpose: To evaluate the effects of hypertonic saline solution associated to remote ischemic perconditioning in renal ischemia/reperfusion injury in rats. Methods: Twenty five male rats (Wistar) underwent right nephrectomy and were distributed into five groups: Sham group (S); Ischemia/Reperfusion group (I/R) with 30 minutes of renal ischemia; Remote ischemic perconditioning group (Per) with three cycles of 10 minutes of I/R performed during kidney ischemia; Hypertonic saline solution group (HSS) treated with hypertonic saline solution (4ml/kg); remote ischemic perconditioning + Hypertonic saline solution group (Per+HSS) with both treatments. After reperfusion, blood samples were collected for BUN and creatinine serum levels analyzes. TBARS were evaluated in plasma and renal tissue to assess oxidative stress. Kidney histopathological examination were performed. Results: Per+HSS group showed a lower degree of renal dysfunction in relation to I/R group, whereas the technique of remote ischemic perconditioning isolated or associated with saline solution significantly reduced oxidative stress and histological damage. Conclusion: Remote ischemic perconditioning associated or not to saline solution promoted reduction of acute renal injury induced by ischemia/reperfusion.

Effect of aqueous extract of the Vigna angularis in rats subjected to an experimental model of moderate chronic kidney disease

ABSTRACT PURPOSE: To evaluate the effect of the aqueous extract of the Vigna angularis, popularly known as "Azuki beans", in rats subjected to an experimental model of moderate chronic kidney disease. METHODS: Thirty rats underwent two surgeries - Ormrod and Miller (1980) - to obtain Moderate Chronic Kidney Disease (CKD-M). The animals were randomized into 3 groups. Group 1 (Control): distilled water. Group 2 (Azuki): Vigna angularis 5% aqueous extract. Group 3 (Treatment): 10mg/kg of enalapril maleate. The rats received their respective treatments for 14 days. RESULTS: The treatment with azuki beans produced an increase in urine output from the second day until the end of the experiment compared to the Control groups (p<0.01) and Treatment (p<0.05). The treatment with azuki also produced significant reductions in the levels of glucose, triglycerides, VLDL, uric acid, Alanine aminotransferase (p<0.05), urea and serum creatinine (p<0.01), besides having produced a significant increase in the levels of HDL when compared to the Control group. CONCLUSION: Treatment with Azuki beans produced improvements in the parameters of renal function and significantly reduced glucose levels, triglycerides, VLDL, alanine aminostransferase, uric acid and creatinine, besides having produced a significant increase in the levels of HDL in rats submitted to a model of moderate chronic kidney disease.

The study of renal injury in portal hypertensive rat after the occlusion of portal vein and inferior vena cava / 中国现代普通外科进展

Objective:To investigate the renal injury of portal hypertensive rat after one hour of occlusion of portal vein and inferior vena cava.Methods:Healthy male Wistar rats were taken randomly as normal control、portal hypertensive control and trial group.The recoverable portal hypertensive model was induced firstly.Three weeks later ,15 model rats were taken randomly as portal hypertensive control group,others had another operation and were divided randomly into 0,6h,12h,24h,48h,72h,7d group according to different reperfusion time after 1 hour of occlusion of portal vein and inferior vena cava.At the corresponding time points after reperfusion,the examinations below were done:serum ALT,TBIL,BUN,Cr concentrations;mor-phological changes of liver and kidney,the ultrastructure of renal tissue.Results:Serum and Cr in trail group reached their peak value 12~24 hours after reperfusion,then decreased gradually,and returned to normal 72 hours after reperfusion.The main injury of kidney was located in proximal tubular epithelial cell ,it peaked at 12 hours and 24 hours after reperfusion,the sporadic karyopyknosis and karyorrhexis could be seen,but the basement membrane preserved well.48 hours later,the restoration could be seen.7 days later it restored obviously.Conclusion:There are obvious injury in tubular epithelial cell in the portal hypertensive rat after 1 hour of occlusion of portal vein and inferior vena cava.But the injury of kidney is reversible.