Antinociceptive and Antioxidant Activities of the Methanolic Extract of Telfairia occidentalis Seeds

CONTEXT The seeds of Telfairia occidentalis have been known to possess different biological properties and are used in traditional medicine in Africa and Asia to treat many ailments. The plant is particularly noted traditionally for its healing properties and is usually consumed in the form of herbal decoctions/concoctions as a blood tonic, to treat sudden attacks of convulsions, pain, malaria and anaemia. AIMS In the present study, various phytochemical and pharmacological studies were done on the methanolic extract of the seeds of Telfairia occidentalis to evaluate its antioxidant and antinociceptive properties to substantiate its traditional use. METHODS Phytochemical screening of the extract was done according to standard procedures. Antioxidant potential was ascertained using 2,2-diphenyl-1-picryl hydrazyl (DPPH) scavenging activity, total phenolic content and total flavonoid content assays. Analgesic activity was analyzed using formalin induced paw licking test in albino rats at 100, 200 and 400 mg extract per kg body weight. STATISTICAL ANALYSIS USED All results extrapolated from the experiments were expressed as mean ± SEM. Data obtained was analyzed statistically using ANOVA (one-way) followed by Dennett's posthoc test. RESULTS Phytochemicals present in the extract were alkaloids, flavonoids, saponins, terpenoids, steroid and anthraquinones. The extract significantly inhibited DPPH scavenging activity with percentage inhibition of 147.3%. The methanolic seed extract of T. occidentalis significantly reduced (P < 0.05) formalin induced paw licking in both neurogenic and inflammatory phases of formalin induced paw licking test, with 35.59 and 78.51% inhibition at 400 mg/kg, in albino rats in a dose dependent manner. CONCLUSIONS The seed extract in this study significantly reduced formalin induced hind paw licking, and could be used as an analgesic for treatment of pain and also showed marked antioxidant potential.