Abstract
Costus pulverulentus C. Presl (Costaceae), a species endemic to Mexico, is used for the empirical treatment of cancer, pain, and inflammation. The objective of this study was to evaluate the toxicity, as well as the cytotoxic, antinociceptive, anti-inflammatory and sedative effects of an ethanol extract from Costus pulverulentus stem (CPE). The chemical characterization of CPE was performed by Gas chromatography-mass spectrometry (GC-MS). The toxicity of CPE was evaluated using the comet assay (10-1000 µg/ml during 5h) and the acute toxicity test (500-5000 mg/kg p.o. and i.p. during 14 days). The cytotoxic effect of CPE (1-250 µg/ml) on human cancer cells was evaluated using the MTT assay. The antinociceptive effects of CPE (50-200mg/kg p.o.) were evaluated using thermal-induced nociception tests (hot plate and tail flick) and the chemical-induced nociceptive tests (acetic acid and formalin). The sedative activity of CPE (50-200mg/kg p.o.) was evaluated using the ketamine-induced sleeping time test. CPE showed the presence of compounds such as campesterol, stigmasterol β-sitosterol, vanillic acid, among others. In the comet assay, CPE at 200 µg/ml or higher concentrations induced DNA damage. In the acute toxicity test, the LD50...Continue Reading
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