جستجوی مقالات مرتبط با کلیدواژه « پراکسیداسیون » در نشریات گروه « پزشکی »

Alzheimer’s disease is one of the most prevalent brain neurodegenerative diseases and the most common cognitive deficits are memory dysfunction and spatial perception impairment. Progesterone has a neorostroid action in hippocampal neurogenesis, synaptic stability and spatial learning and memory and has antioxidant effect. Since oxidative stress is involved in the pathogenesis of Alzheimer's disease, and conflicting results were reported about the effects of progesterone on therefore in Alzheimer’s, the present study investigated the effect of microinjection of three doses of progesterone on the process of spatial memory and lipid peroxidation and total peroxidation in the hippocampus in the experimental model of AD.
42 adult male Wistar rats weighting 250±50 g were randomly divided into six main groups (n=7): control group, sham group, Alzheimer’s model (intracerebroventricular injection of streptozotocin), Alzheimer model progesterone (0.5, 1.5, 2µg/kg). 2 weeks after injection of streptozotocin (3 mg/kg), Alzheimer's was induced then progesterone injected in different doses. After termination of behavioral testing days, the hippocampus was removed to measure the levels of oxidative stress parameter to measure levels of oxidative stress parameters. Statistical analysis was performed using analysis of variance (ANOVA).
Results showed that intraventricular injection of STZ decreased spatial memory in comparison to control group (P Progesterone can prevent a decrease in spatial learning and memory by reducing oxidative stress in the hippocampus of rats with Alzheimers.

Reactive oxygen species (ROS) and oxidative stress play important roles in the development of diabetic complications. Regarding the importance of medicinal herbs, the effect of Sumac extract on lipid peroxidation and diabetic nephropathy was explored in this study. In this experimental study, 30 adult male Wistar rats were divided into 5 six member groups. Control rats were injected with the necessary volume of physiological serum. Group II contracted diabetes by being intraperitoneally injected 120 mg/kg Alloxan.The rats of the third, fourth, and fifth group, in addition to the same treatment, were fed 50, 100 and 250 mg/kg of aqueous extract of Rhus-coriaria L. respectively for 4 weeks. After 28 days of treatment, blood samples were collected from the heart. Plasma malondialdehyde (MDA) concentration, as an end product of lipid peroxidation, was determined. In addition, kidney tissues were removed and prepared for histological analysis. The obtained data was analyzed by means of one-way analysis of variance (ANOVA) and Tukey statistical test Treatment with the extract of Sumac caused a significant reduction in MDA level in diabetic groups treated, compared with the control and diabetic groups (P<0.05). Moreover, treatment with the extract led also to a significant improvement of side-effects of diabetes mellitus on the distal arterioles of renal tissues in diabetic rats. It was found that sumac decreases lipid peroxidation and kidney damage in diabetic rats.

Bradykinin has effects on histaminic response,vessels seepage,cellular reproduction,causing fever, pain and coughs caused by ACE controllers (3,4,6). Noscapin has controlled Bradykinins contractional effects on guinea pigs trachea and rats vazodofran (5,6). noscapin stops the secondary effects of eskimi in brains edema, with antagonizing the responses caused by Bradykinin (3,4,8). considering that opium’s alkaloids act as agonist of peptide systems like ankephalins and RAS, its interesting to know the effects of this alkaloids and among them Noscapine on B3 Bradykinin receptors on smooth muscle guinea pig trachea? All variables are reported as mean and standard deviation.We have used pair test and the informations were processed by Excel, Statistical analysis with ANOVA (LSD) SPSS 9. we took diagrams in to consideration and indicated that the contract ional effect of Bradykinin decreased dependent on density, in presence of three different amount of noscapines concentration. In this study we could demonstrate that noscapine interact with Bradykenin as a non competitive antagonist.