Antiulcer activity of hydroalcoholic extract of unripe fruit of carica papaya in experimental rats

Background: Carica papaya has previously reported antioxidant, analgesic and anti-inflammatory, antibacterial and anti-histaminic activity. Peptic ulcer disease involves inflammation and oxidative stress, so hydroalcoholic extract of Carica papaya fruits may have strong potential for an antiulcer agent. Aim and objectives of the study were in this study pharmacological evaluation of antiulcer effect of hydroalcoholic extract of Carica papaya fruits was performed by pyloric ligation induced gastric ulcers.Methods: Preliminary phytochemical investigation, estimation of phenolic and flavonoid content, In vitro antioxidant activities, antiulcer activity to find out the efficacy of hydroalcoholic extract of Carica papaya fruits.Results: Treatment with 500 mg/kg of hydroalcoholic extract of Carica papaya fruits efficacious in reducing ulcer index in pyloric ligation induced gastric ulcer model. Hydroalcoholic extract Carica papaya of showed a dose dependent decrease in ulcer and reduces ulcer index which was supported by morphological and histological studies.Conclusions: Thus it can be concluded that hydroalcoholic extract of Carica papaya fruits have antiulcer activity, which can be attributed to its antioxidant mechanism of action

DEVELOPMENT AND CHARACTERIZATION OF NOVEL HERBAL FORMULATION (POLYMERIC MICROSPHERES) OF SYZYGIUM CUMINI SEED EXTRACT

Objective: The purpose of the present investigation was to develop and characterize a novel herbal formulation (polymeric microspheres) of Syzygium cumini seed extract.Methods: The extract-loaded microspheres using biological macromolecule ethyl cellulose (EC) was prepared by o/w emulsion solvent evaporation technique using polyvinyl alcohol (PVA) emulsifier. The effect of various process and formulation variables (stirring speed, evaporation time, drug/polymer ratio and organic/aqueous phase ratio) on the properties of microspheres was evaluated.Results: Micromeritic properties indicated good flow properties, and scanning electron microscopy (SEM) confirmed the spherical nature of the prepared microspheres. The particle size and entrapment efficiency were varied between 34.25 to 176.25 µm and 10.51 to 42% depending upon the variables. All the formulations showed minimal drug release in an acidic environment (pH 1.2) confirming the prevention of drug release in the stomach and enteric nature of the polymer. Sustained drug release has been observed in alkaline dissolution media (pH 7.4) after 12 h of drug release study except for formulation F7 which contains a lower concentration of polymer. The fourier transform infrared spectroscopy (FTIR) analysis indicated the compatibility of the extract with the polymer. The absence of extract-polymer interaction was indicated by the differential scanning calorimetry (DSC) thermogram. x-ray diffraction (XRD) analysis revealed the amorphous nature of the extract in the microspheres which in pure form exhibits a crystalline structure.Conclusion: The findings of this present study suggest that microsphere formulation was a promising carrier for novel delivery of herbal drugs

Kinetics of Chromic Acid Oxidation of Thioglycollic, Thiolactic & Thiomalic Acids

1082-108

PREPARATION AND EVALUATION OF SURFACE MODIFIED NANOPARTICLES OF CALCIUM PHOSPHATE AS EXTRACT CARRIER

Objective: The aim of this study was to develop, optimize and characterize carbohydrate coated calcium phosphate nanoparticles of Chelidonium majus L. extract along with carried out in vivo study to observe activity in the liver. Methods: Surface modified calcium phosphate nanoparticles of Chelidonium majus L. extract were developed and optimized. Extract loading and particle size were the two responses, effects on which were analyzed. Characterization studies, in vitro extract release and in vivo distribution studies were carried out. Also in vivo histopathological analysis was carried out to observe effects of extract loaded nanoparticles in liver of wistar albino rats in paracetamol, rifampicin-isoniazid, cisplatin and carbon tetrachloride-induced hepatotoxicity. Results: Pareto chart and surface response curve indicated that sonication time, the concentration of lactose and concentration of extract were important factors affecting particle size and extract loading. ANOVA was performed and obtained data pointed out that model was significant for both responses. Particle size and zeta potential results indicated the stability of prepared nanoparticles along with extract was loaded (37.22 %) satisfactorily on coated cores. Characterization studies indicated no interaction between the components and also extract release demonstrated diffusion-controlled mechanism. These extract loaded nanoparticles were largely found in the liver than heart, lungs. Hepatoprotective activity of nanoparticles of the extract was confirmed by correlating histopathology results of normal, toxic, silymarin treated, extract-treated and formulation treated groups. Conclusion: Lactose coated nanoparticles of calcium phosphate proved to be excellent carriers of plant extract. These nanoparticles efficiently targeted liver and generated cellular protective action in hepatic damage

PHARMACOGNOSTICAL EVALUATION, IN VITRO ANTIOXIDANT EFFECTS OF SYZYGIUM CUMINI LINN. SEED EXTRACT, AND THE POTENTIAL ROLE OF THIS EXTRACT AS HYPOGLYCEMIC AGENT IN ALLOXAN–INDUCED DIABETIC RATS

Objective: Diabetes, the third killer†of mankind, is now a global burden affecting nearly 10% of the population. The present study aimed at pharmacognostical evaluation of Syzygium cumini seed powder, phytochemical profiling, total phenolic, and flavonoid content determination and to ascertain its antioxidant activity and hypoglycemic potential in alloxan-induced diabetic rats.Methods: Pharmacognostical and physicochemical parameters of the seed powder were determined by using standard methods as per Ayurvedic Pharmacopoeia of India (API). In vitro antioxidant activity was determined by 1, 1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity. Ethanolic extract of Syzygium cumini seed at a dose of 200mg/kg and 400mg/kg body weight (bw) were given orally in alloxan-induced (150mg/kg, i.p) diabetic rats daily for three weeks.Results: physicochemical parameters complied with the API standards. Phytochemical profiling revealed that the extract contains phenolic compounds, flavonoids, glycosides, alkaloids, tannins, and saponins. The extract is rich in phenolic compounds which were 177.33 mg gallic acid equivalent/g (GAE/g dry weight) and showed significant percentage inhibition compared to standard ascorbic acid. The extract reduced the fasting blood sugar (FBS) level by 46.67–52.67% which is very close to the standard drug glibenclamide (reduced FBS by 65.58%). It also improved the bw by 18.20–20.41% after extract treatment where the standard drug increased the bw by 22.95% of the diabetic rats.Conclusion: In conclusion, Syzygium cumini seed extract is rich in phenolic compounds. Results suggested that the extract possesses significant radical (DPPH) scavenging activity and FBS lowering potential in alloxan-induced diabetic rats

DEVELOPMENT AND EVALUATION OF SUSTAIN RELEASE MICROPARTICLES OF METOPROLOL SUCCINATE

Objective: In this study, xanthan gum was oxidized by sodium periodate to form xanthan dialdehyde. This oxidized gum was used as crosslinking agent as an alternative to somewhat toxic glutaraldehyde, the basis of which is the reaction between the Schiff reagent and the aldehydes formed by periodate oxidation. Methods: Formation of aldehyde groups were confirmed by Fourier Transform Infrared Spectroscopy (FTIR). Microparticles of metoprolol succinate were fabricated using crosslinking of a chitosan/gelatin mix system by dialdehyde Xanthan gum. The properties of the developed microparticles were investigated with swelling equilibrium studies, differential scanning calorimeter (DSC), in vitro drug release studies and scanning electron microscopy (SEM). Results: The in vitro drug release from these microparticles was affected by total polymer amount, oxidation reaction time and chitosan to gelatin ratio. The cumulative percent release of metoprolol succinate was observed within the range of 46 to 95% at 8 h from different formulations studied. The factors identified as significant to produce any impact on drug loading as well as drug release were both the polymer and inter actions of polymer and Xanthan gum dialdehyde. Conclusion: The release mechanism followed the super case II model kinetics

Kinetics of Os(VIII)-catalysed Oxidation of Neutralized Glyoxylic & Pyruvic Acids by Alkaline Hexacyanoferrate(III)

586-58

Gravimetric Estimation of Mn(II) with Sodium Benzilate

70-7