Biomedical subjects
Publications and source records attributed to R D Budhiraja.
Protective effect of Withaferin-'A' against CCl4 induced hepatotoxicity has been assessed and the compound at 10 mg/kg dose was found to possess significant protective effect. A comparison of this protective effect with that of hydrocortisone showed it to be as effective as hydrocortisone dose per dose.
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Explore the source record for details and available documents.
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Medicinal grade yellow and white petrolatum (soft paraffin) were tested for dermatoxic effects on laboratory animals and man. Yellow petrolatum produced redness, thickening of skin, hyperkeratosis and reversible total hair loss in rabbit and rat but no dermatoxic effect was observed in man and dog. White petrolatum which is similar in composition to yellow petrolatum produced less redness and keratosis. Refluxing of yellow soft paraffin with 95% alcohol could dissolve out dermatoxic fraction. The results have been discussed and it is suggested that drugs with petrolatum as ointment base should not be tested on rats and rabbits as petrolatum itself is dermatoxic in these species.
The acute effect of single dose of ethanol (1.5 g kg) and aspirin (10 mg/kg) alone and in combination, on platelet aggregation time and platelet adhesiveness were studied in rabbits. There was a significant and comparable increase in aggregation time both by aspirin and ethanol. Similarly platelet adhesiveness was decreased by both the agents.
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A new withanolide, with a unique chemical structure similar to the aglycones of the cardiac glycosides, with mol. wt. 488 6, m. p. 260-261 degrees, isolated from the fruits of Withania coagulans, was screened for cardiovascular effects. At doses of 5 mg/kg body weight, the withanolide produced a moderate fall of blood pressure in dogs (34 +/- 2.1, mm Hg) which was blocked by atropine and not by mepyramine or propranolol. In rabbit Langendorff preparation and ECG studies, it produced myocardial depressant effects but in perfused frog heart it produced mild positive inotropic and chronotropic effects.