Effects of cleistanthins A and B on blood pressure and electrocardiogram in Wistar rats.
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| Abstract |
We have studied the effects of cleistanthin A and cleistanthin B, phytoconstituents isolated from the leaves of Cleistanthus collinus Roxb. (Euphorbiaceae), on blood pressure, electrocardiogram, and barium chloride-induced arrhythmia in Wistar rats. The two compounds were isolated by column chromatography and their identity was confirmed spectroscopically. A healthy, male Wistar rat was used to record the invasive blood pressure and electrocardiograph. The antiarrhythmic effects of cleistanthins A and B were studied using the barium chloride model. Both cleistanthin A and cleistanthin B showed a dose-dependent hypotensive effect. Both compounds reduced the mean blood pressure significantly although the dose required for the effect was higher in the case of cleistanthin B. In the electrocardiogram, cleistanthins A and B significantly altered the electrical activity of the heart, the changes were transient and of no further consequence. Intravenous injection of 64 microg or more of cleistanthins A and B caused a sudden respiratory depression without affecting the electrocardiogram. Cleistanthins A and B did not display any antiarrhythmic effect against barium chloride-induced arrhythmia. In conclusion, both cleistanthin A and cleistanthin B exert a hypotensive effect and have no antiarrhythmic effect against barium chloride-induced arrhythmia in Wistar rats.
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| Authors | Subramani Parasuraman, Ramasamy Raveendran, Raja J Selvaraj |
| Journal | Zeitschrift fur Naturforschung. C, Journal of biosciences (Z Naturforsch C J Biosci) 2011 Nov-Dec Vol. 66 Issue 11-12 Pg. 581-7 ISSN: 0939-5075 [Print] Germany |
| PMID | 22351983 (Publication Type: Journal Article) |
| Chemical References |
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