Analgesic and anticonvulsant effects of extracts from the leaves of Kalanchoe crenata (Andrews) Haworth (Crassulaceae)

Kalanchoe crenata Andr. (Crassulaceae) is a fleshy herbaceous plant used in the African traditional medicine as remedies against otitis, headache, inflammations, convulsions and general debility. In the present work, the analgesic effects of methylene chloride/methanol (1:1) (CH 2Cl 2/CH 3OH) extrac...

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Bibliographic Details
Published in:	Journal of ethnopharmacology Vol. 106; no. 1; pp. 70 - 75
Main Authors:	Nguelefack, T.B., Nana, P., Atsamo, A.D., Dimo, T ., Watcho, P., Dongmo, A.B., Tapondjou, L.A., Njamen, D., Wansi, S.L., Kamanyi, A.
Format:	Journal Article
Language:	English
Published:	Shannon Elsevier Ireland Ltd 15-06-2006 Elsevier
Subjects:	Analgesia analgesic effect Analgesics - therapeutic use Animals Anticonvulsant anticonvulsants Anticonvulsants - therapeutic use Biological and medical sciences chemical constituents of plants Convulsants - toxicity ethnobotany Female General pharmacology herbal medicines Kalanchoe Kalanchoe crenata Leaves Male Medical sciences medicinal plants medicinal properties Mice Pentylenetetrazole - toxicity Pharmacognosy. Homeopathy. Health food Pharmacology. Drug treatments Phytotherapy plant extracts Plant Extracts - therapeutic use Plant Leaves - chemistry Rats Rats, Wistar Seizures - chemically induced Seizures - drug therapy Semicarbazides - toxicity traditional medicine Africa Leaves Analgesia Kalanchoe crenata Anticonvulsant Pharmacognosy Crassulaceae Extract Plant leaf Medicinal plant Analgesic Dicotyledones Angiospermae Plant origin Spermatophyta Kalanchoe
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Summary:	Kalanchoe crenata Andr. (Crassulaceae) is a fleshy herbaceous plant used in the African traditional medicine as remedies against otitis, headache, inflammations, convulsions and general debility. In the present work, the analgesic effects of methylene chloride/methanol (1:1) (CH 2Cl 2/CH 3OH) extract and its hexane, methylene chloride (CH 2Cl 2), ethyl acetate, n-butanol fractions and aqueous residue have been evaluated using acetic acid, formalin and pressure test. The anticonvulsant effects of the CH 2Cl 2/CH 3OH extract were also investigated on seizures induced by pentylenetetrazol (PTZ 70 mg/kg), strychnine sulphate (STN 2.5 mg/kg) and thiosemicarbazide (TSC 50 mg/kg). CH 2Cl 2/CH 3OH extract and its fractions, administered orally at the doses of 150 and 300 mg/kg, exhibited protective effect of at least 30% on the pain induced by acetic acid. The CH 2Cl 2 fraction at 300 mg/kg showed a maximal effect of 78.49%. The CH 2Cl 2/CH 3OH extract and its CH 2Cl 2 fraction at the doses of 150 and 300 mg/kg significantly reduced the first phase of pain induced by formalin while the second phase was completely inhibited. The CH 2Cl 2 fraction produced more than 45% reduction in the sensitivity to pain induced by pressure. The CH 2Cl 2/CH 3OH extract of Kalanchoe crenata significantly increased the latency period in seizures induced by PTZ and significantly reduced the duration of seizures induced by the three convulsant agents. The extract protected 20% of animals against death in seizures induced by TSC and STN. These results suggest a peripheral and central analgesic activities as well as an anticonvulsant effect of the leaves of Kalanchoe crenata.
Bibliography:	http://dx.doi.org/10.1016/j.jep.2005.12.003
ISSN:	0378-8741 1872-7573
DOI:	10.1016/j.jep.2005.12.003