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Journal of Ethnopharmacology 2017-Mar

Elucidation of the possible mechanism of analgesic actions of butanol leaf fraction of Olax subscorpioidea Oliv.

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Saidi Odoma
Abdulkadir Umar Zezi
Nuhu Mohammed Danjuma
Abubakar Ahmed
Muhammed Garba Magaji

키워드

요약

BACKGROUND

Preparations of Olax subscorpioidea have been used traditionally for the management of pains, inflammatory diseases, yellow fever, cancer and rheumatism. Previously, the analgesic activity of its leaf extract have been reported. Furthermore, an analgesic assay guided fractionation showed that the butanol soluble fraction is the most active. However, the mechanism of this activity remains to be elucidated. This present study investigated the possible pharmacological mechanisms involved in the analgesic activity of the butanol leaf fraction of Olax subscorpioidea (BFOS) using the acetic acid induced writhing test in mice.

METHODS

Animals were orally administered distilled water (10ml/kg), BFOS (1,000mg/kg) and morphine (10mg/kg) 60minutes before i.p administration of acetic acid and the resulting writhing were counted for 10minutes. To establish the possible mechanism(s) of action of BFOS, separate group of animals were pretreated with naloxone (2mg/kg, i.p), prazosin (1mg/kg, i.p), yohimbine (1mg/kg, i.p), propranolol (20mg/kg, i.p), metergoline (2mg/kg, i.p), glibenclamide (5mg/kg, i.p) and l-arginine (50mg/kg, i.p) 15minutes before BFOS.

RESULTS

BFOS and morphine showed marked analgesic activities (p<0.001); the pretreatment of animals with naloxone, metergoline and l-arginine significantly (p<0.05 and p<0.001) reduced the analgesic activity of BFOS; however, pretreatment with prazosin, yohimbine, propranolol and glinbenclamide showed no effect on its analgesic activity.

CONCLUSIONS

Results obtained in this study suggest the involvement of opioidergic, serotonergic and nitric oxide-l-arginine pathways in the analgesic effect of butanol leaf fraction of Olax subscorpioidea.

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