Posted by admin on Oct 31, 2016 in |
A stability indicating RP-HPLC method was developed and validated for the determination of Irbesartan in bulk and dosage forms using Telmisartan (10 μg/ml) as the internal standard. An Inert ODS C-18, 5μm column having 250 x 4.6mm internal diameter in isocratic mode with mobile phase containing methanol: water (90:10) and the pH was adjusted to 3 with 1 % GAA. The flow rate was 1 ml/min and effluents were monitored at the wavelength of 246 nm. The retention time for Irbesartan was 2.3 min. The method was validated as per ICH guidelines for linearity, accuracy, precision, specificity, limit of detection, limit of quantification and robustness. Limit of detection (LOD) and limit of quantification (LOQ) were found 6.51μg/ml and 1.973μg/ml respectively and recovery of Irbesartan from bulk and dosage forms was found from 99.94% to 99.97%. As the separation of the degradants using this mobile phase is quite good, isolation of the degradants with preparative techniques can also be achieved using this mobile phase. The drug was prone to degrade...
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Posted by admin on Oct 31, 2016 in |
Superporous hydrogels (SPHs) were developed to retain the drug in the gastric medium. These systems swell very rapidly in the stomach and maintain their integrity for longer time even in the acidic environment of stomach, while releasing the pharmaceutical active ingredient. The present work focuses on concept of development of superporous hydrogel tablets of Dexlansoprazole, their comparativeness to the marketed delayed release dosage forms. The aim of this study was to prepare Gastroretentive dosage form based on SPH using Dexlansoprazole, a proton pump inhibitor as a model drug for swelling & prolonged drug release characteristics in acidic pH. The formulation is based on preparation of third generation SPHs with three different polymers, such as, sodium alginate, pectin, chitosan and acrylic acid were used with different concentrations by crosslinking technique using formaldehyde as cross linking agent to get the desired sustained release profile over a period of 8-12 hrs. The characterization studies for SPH were performed by measurement of apparent density, porosity, swelling studies, mechanical strength, scanning electron microscopy (SEM)...
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Posted by admin on Oct 31, 2016 in |
Aerva pseudotomentosa Blatt. & Hallb. (Amaranthaceae) is arid region plant commonly known as Bui. It is used in ethno medicinal practices for the treatment of pain and inflammatory hyperalgesic disorders such as rheumatic pain, fever, inflammation, wounds and urinary disorders. This study was conducted to evaluate the anti-nociceptive, antipyretic effects of A. pseudotomentosa leaves aqueous extract. The aqueous extract of A. pseudotomentosa leaves (APAE) was prepared by maceration. Total phenolic and flavonoid contents were determined spectrophtometrically. Two dose levels (200 and 400 mg/kg) of the extract were administered by oral route to laboratory mice and rats. Peripheral nociception was induced in rodents using (acetic acid induced abdominal writhing and formalin), supra spinal (hot plate) and spinal (tail immersion) behavioral models of acute pain were used, while the fever was induced by using brewer’s yeast. The total phenolic and flavonoid contents were estimated 359.3 mg tannic acid equivalents/g and 248.5 mg quercetin equivalents/g of extract, respectively in aqueous extract. The APAE at dose 400 mg/kg exhibited significant anti-nociceptive effect (p...
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Posted by admin on Oct 31, 2016 in |
Anti-diabetic activity of hydro-alcoholic extract of Chrysophyllum cainito frutis (CCE) was investigated against experimentally induced diabetics in rats using alloxan and streptozotocin (STZ). Acute toxicity study was performed and hydro-alcoholic extract of CCE was found to be safe at a dose of 2000 mg/kg bodyweight. Two doses 200 mg/kg and 400 mg/kg b.w p.o. of the CCE were subjected for the evaluation of anti-diabetic activity against the diabetic induced by alloxan (100 mg/kg, i.p) and STZ (50 mg/kg, i.p) in rats. Glibenclamide (5 mg/kg p.o) was served as standard in both the models. Fasting blood glucose, serum total cholesterol, serum triglycerides, lipid profile (HDL and LDL) and histopathology were evaluated in the study. Both the lower (200 mg/kg) and higher dose (400 mg/kg) of CCE showed a dose dependent significant decrease in blood glucose level, triglyceride, cholesterol levels and LDL and an increase in HDL in the treated diabetic rats when compared with diabetic control. Histopathology of pancreas showed regeneration of β-cells in extract treated diabetic rats. The results...
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Posted by admin on Oct 31, 2016 in |
Estimation of binding affinity of receptor – ligand complex in docking study of small molecules plays an Important role in structure based drug development process. The γ-amino-butyric acid amino-transferase (GABA-AT) exhibits a catalytic role in regulating γ-amino -butyric acid (GABA) level in brain and responsible for many physiological and pathological changes. Here, in – silico study of benzothiazoles – GABA analogs as γ-amino-butyric acid amino-transferase inhibitors for antiepileptic activity was done. Docking study was completed by AutoDock Vina 1.1.2 (MGI Tools 1.5.6) and PyMol 1.7. We derived energy optimized pharmacophoric features for eighty five ligands and; compared with carbamazepine and vigabatrine. Docking results reveal that most of the ligands showed more affinity (-10.6 to -6.2 kcal/ mol) towards GABA – AT as compared to carbamazepine (-6.7 kcal/ mol) and vigabatrine (-5.0 kcal/ mol). Derivative with serial number 68 was found to possess the best binding affinity for GABA-AT with scoring energy as 10.6 kcal/ mol. Different descriptors were derived and analyzed for any violation of Lipinsky’s rule of five...
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