ABSTRACT
Objective: The development of new delivery systems for the controlled release of drugs is one of the most innovative fields of research in pharmaceutical sciences. Nanoparticles specially designed to release the drug in the vicinity of target sites. The aim of this study was to formulate and evaluate the Lansoprazole nanoparticles to improve the therapeutic efficacy of Lansoprazole by loading in nanoparticle drug delivery system. Materials and Methods: Lansoprazole loaded chitosan nanoparticles (CNP1 to CNP10) were prepared by ionotropic gelation method. The formulated nanoparticles were evaluated for external morphological characters, determination of particle size analysis, zeta potential, drug content, entrapment efficiency and in-vitro release studies. Results: The drug content for the Lansoprazole loaded chitosan nanoparticles varied from 69.5±7.2% to 87.9±1.2%. The entrapment efficiencies were found to be minimum and maximum of 39.3±2.6% and 85.6±1.2%, the optimum entrapment efficiency was found to be 85.3±0.8%, particle size varied from 360±12nm to 814±62nm, zeta potential values were in positive and increased from 11.2±1.2mV to 18.7±0.4mV. In-vitro release of drug follows zero order and showed sustained release behavior for a period of 24 hr. Conclusion: The study demonstrated the successful preparation of sustained release polymeric nanoparticles of Lansoprazole.
ABSTRACT
Antiulcerogenic effect of the alcoholic (ALJP) and aqueous (AQJP) extracts of the whole plant of Justicia prostrata was studied in aspirin+pylorus ligated rat models and analysed for gastric volume, ulcer index, free and total acidity. Biochemical parameters like total proteins, total hexoses, hexosamine, fucose and sialic acid were also estimated. Both extracts (ALJP and AQJP) significantly reduced both the gastric volume and the acidity of gastric juice. It also significantly promoted gastric mucus secretion by increasing total carbohydrates and decreasing the protein concentration in aspirin+ pylorus ligated rats. The results suggest that both the extracts (ALJP and AQJP) possess antiulcer activity, whereas AQJP is more effective when compared with ALJP in aspirin+pylorus ligated rat models. The results were compared with the standard drug Rantidine, a H2 receptor antagonist.
Subject(s)
Acanthaceae/chemistry , Animals , Anti-Ulcer Agents/therapeutic use , Aspirin , Disease Models, Animal , Dose-Response Relationship, Drug , Gastric Acidity Determination , Gastric Juice/chemistry , Gastric Mucins/metabolism , Gastric Mucosa/drug effects , Ligation , Male , Plant Extracts/therapeutic use , Rats , Rats, Wistar , Stomach Ulcer/drug therapyABSTRACT
Based on the results of studies on varietal screening, antixenosis (egg laying preference) and antibiosis (larval survival and adult emergence), rice varieties W1263 and CO43 were selected as resistant and susceptible parents, respectively, for yellow stemborer (YSB) infestation. A mapping population was developed using above parents following single seed descent method. Screening for YSB reaction in F1 and F2, generations under field and glasshouse conditions for both dead hearts and white ears, established the polygenic nature of inheritance for YSB resistance. Field screening for YSB resistance at F9 generation revealed the difference in the reactions among recombinant inbred lines (RILs) between vegetative and reproductive stages. The experiments under field and glasshouse screening of RILs for dead hearts showed significant positive association. However, the reaction was more towards susceptibility in glasshouse screening due to no choice test. Scoring of 250 RILs (F8) for various morphological traits showed wide range of variation indicating the suitability for QTL mapping.