The anti-inflammatory effects and the inhibition of neutrophil responsiveness by Barleria lupulina and Clinacanthus nutans extracts.

Journal of Ethnopharmacology
Payong WanikiatV Reutrakul

Abstract

To investigate the anti-inflammatory activities of Barleria lupulina Lindl and Clinacanthus nutans (Burm.f.) Lindau extracts using two neutrophil-dependent acute inflammatory models and, in order to elucidate underlying cellular mechanisms, the effects of the extracts on human neutrophil responsiveness was investigated. The in vivo inflammatory models examined were carrageenan-induced paw oedema and ethyl phenylpropiolate-induced ear oedema in rats. Myeloperoxidase (MPO) activity was assayed as an indicator of neutrophil migration. Human neutrophil functional responsiveness was determined by measuring fMLP-induced chemotaxis, superoxide anion generation (SAG), and release of MPO and elastase. Apoptosis was assessed morphologically and flow-cytometrically. Neutrophil viability was assessed by trypan blue exclusion and MTT cytotoxicity assays. Both extracts induced powerful dose-dependent inhibitory effects in both edema models in rats. Importantly, there was a significant inhibition of MPO activity in the inflamed tissue indicating that the anti-inflammatory effect of the extracts is associated with reduced neutrophil migration. Although both extracts did not affect neutrophil viability or apoptosis, treatment of neutrophils wit...Continue Reading

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Citations

Mar 28, 2013·Evidence-based Complementary and Alternative Medicine : ECAM·Yoke Keong YongZuraini Ahmad
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