ABSTRACT
Parkinson’s disease (PD) results primarily from the death of dopaminergic neurons in substantia nigra. Treatment of PD has been shifted recently towards herbal medicines.Bacopa monnieri (L.) Wettst. (BM) and Mucuna pruriens (L.) DC (MP) are traditional herbal plants known to have neuroprotective effects due to the presence of bacosides in whole plant extract of Bacopa monnieri (BME) and L-DOPA in MP seed extract (MPE). In this study, the comparative effect of BME and MPE in Parkinsonian mice induced by chronic exposure to 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) was evaluated. Twenty four Swiss albino mice (35-45 g) were grouped into Control, MPTP, MPTP+BME and MPTP+MPE (6 mice in each). Experimental mice were given 40 mg/kg body wt. BME, 48 mg/kg body wt. MPE treatment was given orally for one month with prior use of 15 mg/kg body wt. of MPTP for 2 wk. After the treatment period, behavioral study was performed and assessment of neuroprotective effect was done via neurochemical analysis, Immunohistochemical parameters studied included functional viability of dopaminergic neurons in substantia nigra by Tyrosine hydroxylase (TH) using monoclonal antibody against TH and apoptotic study through caspase-3 and m-RNA expression of neurogenic gene in substantia nigra region of brain. Treatment with BME or MPE for one month significantly decreased the elevated levels of oxidative stress found in Parkinsonian mice. In behavioral tests, comparative analysis of BME and MPE showed a significant increase in spontaneous locomotor activity and grip strength test. Moreover, it was found that the use of BME considerably improved the tyrosine hydroxylase activity, caspase-3 and expression of neurogenic gene in the substantia nigra region of the brain. The results suggest that BME may provide a better platform for future drug discoveries and novel treatment strategies for PD as compared to MPE.
ABSTRACT
Present study is aimed to delineate a co-relation between status of anti-oxidant enzymes, lipid peroxidation products with severity of Pregnancy Induced Hypertension (PIH) and cervical dysplasia. The study has been done on 66 patients out of whom 14 were normal pregnancy and had no disease, 31 patients of PIH and 21 patients having cervical dysplasia gr. I-II. Enzymatic activities of Superoxide dismutase (SOD), Catalase (CAT), vitamin C and vitamin E and malonaldehyde levels (MDA, a marker of lipid peroxides) were assessed spectrophotometrically. Mean Malonaldehyde level in PIH patients (8.48 ± 0.96) & Cervical patients (8.31 ± 1.25) in comparison to normal patients (4.88 ± 1.035), the rise was found highly significant (p < 0.001). The enzymatic activity of antioxidants such as Superoxide dismutase, Catalase, vitamin C and vitamin E was decreased in PIH patients & cervical dysplasia patients as compared to normal patients (p < 0.001). The difference was statistically significant (p < 0.001) whereas the same was observed in cervical dysplasia patients. No statistically difference was observed between the levels of antioxidants of PIH patients & cervical dysplasia patients (p < 0.01). Co-relation of Hb with MDA level showed that aneamic patients have raised level of MDA as compared to non aneamic patients. There is positive oxidant/antioxidant balance which may aggravate free radical damage during pre eclampsia and eclampsia with cervical dysplasia.
ABSTRACT
Increased production of oxygen free radicals and decreased oxidant capacity occur in coronary artery diseases (CAD). This pro-oxidant shift in intracellular redox state may induce cell death by either direct cell membrane damage by lipid peroxidation or apoptosis through activation of transcription factors. These changes occur not only in cardiomyocytes, but also in cardiac sympathetic nerves, which are very sensitive to oxidative damage. Patients with heart failure encounter reduced peripheral blood flow at rest, during exercise and in response to endothelium-dependent vasodilators. Current treatments of cardiomyopathy, a degenerative condition of the myocardium frequently associated with heart failure have done little to enhance patient survival. Decreased myocardial contractility and altered regulation of peripheral circulation along with oxidative conditions are important contributors to the symptoms and prognosis of the disease process. Nitric oxide formed from L-arginine (2-amino-5 guanidinovaleric acid) metabolism in endothelial cells contributes to regulation of blood flow under these conditions. L-Arginine is the precursor of nitric oxide, an endogenous messenger molecule involved in a variety of endothelium-mediated physiological effects in the vascular system. In the present study, we investigated the effect of oral administration of L-arginine (3 g/day) on the intracellular redox status of the patients of ischemic cardiomyopathy aged 45-60 yrs. The enzymatic and non-enzymatic antioxidant parameters like superoxide dismutase, catalase, total thiols (TSH) and ascorbic acid along with pro-oxidant parameters, such as xanthine oxidase, as well as index of oxidative stress as protein carbonyl content and malondialdehyde (a marker of lipid peroxidation) were investigated in the plasma and RBC lysate. L-Arginine (3 g/day) administration was found to improve the levels of these parameters in the patients and regulate the blood flow, as evident by the improved blood pressure of the patients. Thus, it is inferred that L-arginine attenuates the oxidative stress conditions along with maintaining the blood pressure rate of patients suffering from cardiomyopathy.