Rajapandian Sivaganesa Karthikeyan

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BACKGROUND Filamentous fungi of the genera Aspergillus and Fusarium are major causes of corneal ulcers in the United States and in the developing world and result in significant visual impairment and blindness. METHODS RNA was extracted from 110 patients with corneal ulcers in southern India within 1 week of infection with either Fusarium solani or(More)
P. aeruginosa and S. pneumoniae are major bacterial causes of corneal ulcers in industrialized and in developing countries. The current study examined host innate immune responses at the site of infection, and also expression of bacterial virulence factors in clinical isolates from patients in south India. Corneal ulcer material was obtained from 49(More)
Intravenous administration of 5-fluorouracil for colon cancer therapy produces severe systemic side-effects due to its cytotoxic effect on normal cells. The broad objective of the present study was to develop novel tablet formulations for site-specific delivery of 5-fluorouracil to the colon without the drug being released in the stomach or small intestine(More)
The present study is carried out to design oral controlled drug delivery systems for highly water-soluble drugs using guar gum as a carrier in the form of three-layer matrix tablets. Trimetazidine dihydrochloride was chosen as a model drug because of its high water solubility. Matrix tablet granules containing 30% (M1), 40% (M2) or 50% (M3) of guar gum were(More)
The objective of the present study is to compare the guar gum-based colon-targeted tablets of 5-fluorouracil against an immediate release tablet by in vitro dissolution and in vivo pharmacokinetic studies in human volunteers. Twelve healthy volunteers participated in the study. 5-Fluorouracil was administered at a dose of 50 mg both in immediate release(More)
The aim of the present investigation is to study the penetration enhancing effect of menthol on the percutaneous flux of nicardipine hydrochloride through the excised rat epidermis from 2% w/w hydroxypropyl cellulose (HPC) gel system. The HPC gel formulations containing nicardipine hydrochloride and selected concentrations of menthol (0-12% w/w) were(More)
The pharmacokinetic evaluation of guar gum-based colon-targeted tablets of mebendazole against an immediate release tablet was carried out in human volunteers. Six healthy volunteers participated in the study and a crossover design was followed. Mebendazole was administered at a dose of 50 mg both in immediate release tablet and colon-targeted tablets. On(More)
The nonsteroidal anti-inflammatory drugs (NSAIDs) are found to be potential chemopreventive agents of colorectal cancer. Celecoxib, an NSAID with selective cyclooxygenase-2 inhibition, was proved to be effective for the prevention of colon cancer in patients with familial adenomatous polyposis (FAP) and sporadic polyps. In the light of this information, the(More)
PURPOSE The present investigation was carried out to study the effect of the solvent system on the permeation of nicardipine hydrochloride across excised rat epidermis in order to select a suitable solvent system for use in the development of a transdermal therapeutic system. METHODS The solubility of nicardipine hydrochloride in pure and mixed solvent(More)
PURPOSE The present investigation is to study the influence of metronidazole and tinidazole on the usefulness of guar gum, a colon-specific drug carrier based on the metabolic activity of colonic bacteria, using matrix tablets of albendazole (containing 20% of guar gum) as a model formulation. METHODS The matrix tablets of albendazole were subjected to in(More)