IN VITRO EVALUATION OF IMMUNOMODULATORY ACTIVITY OF ETHANOLIC EXTRACT OF MORINGA CONCANENSIS NIMMO
Objective: The present study was undertaken to evaluate immunomodulatory activity of ethanolic extract and isolated compound from the whole plant of Moringa concanensis Nimmo
Methods: Immunomodulatory activities were determined by in vitro models-plaque-forming cell assay, nitric oxide (NO) radical scavenging activity, inhibit RAW 264.7 macrophage cell line from generating harmful NO induced by lipopolysaccharide (LPS) and MTT [3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide] assay.
Results: Showed significant (P<0.01) phagocytic effect on human neutrophils in the parameters studied. Scavenged nitric oxide radical by ethanolic extract of Moringa concanensis inhibition 34% and isolated compound scavenged nitric oxide radical inhibition 44% respectively compared to control group exerted 52% decrease of nitric oxide radical respectively concentration at 0.1,0.01 and1.0 mg/ml. LPS in murine macrophage, RAW 264.7 cells culture medium induced a high release of NO but pretreatment with Moringa concanensis extract and isolated compound resulted in inhibition of NO production by 29, 37, 95 % and 32,44,96 % at concentrations of 0.5, 0.1 and 1.0 mg/ml, compared to LPS-induced sample. ethanolic extract and isolated compound significantly stimulate RAW 264.7 cell viability (P<0.001) by MTT assay.
Conclusion: The present experimental finding demonstrated that isolated compound has superior immunomodulatory activity than the ethanolic extract of Moringa concanensis this effect presumably due to the greater ability of an isolated compound to boost the innate and adaptive immune system.
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