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Background  Production of reactive oxygen species is a common cause in alcohol induced liver diseases. Decoction prepared from the whole plant of  Eriocaulon quinquingulare  is prescribed to treat liver disorders. The aim of this study was to investigate the hepatoprotective activity and antioxidant capacity of the water extract of  E. quinquangulare  in vitro.    Method  The aqueous extract of the whole plant of  E. quinquangulare  (AEQ) was investigated for its phytochemical constituents, antioxidant and membrane stabilization properties in-vitro. The antioxidant activities of AEQ were investigated using 1,1-Diphenyl-2-picrylhydrazyl (DPPH), hydroxyl radical, nitric oxide scavenging and ferric reducing antioxidant power (FRAP) assays. Membrane stabilizing effect of the extract was determined by hypotonic solution induced human erythrocyte hemolytic assay (HEHA). Further, hepatoprotective activity against ethanol induced hepatotoxicity was carried out using porcine liver slices.    Results  The total phenolics and flavonoids were 10.3 ± 1.6 w/w % gallic acid equivalents and 45.6 ± 3.8 w/w % (−)-epigallocatechin gallate equivalents respectively. The values of EC 50  for DPPH, hydroxyl radical and nitric oxide scavenging assays were 37.2 ± 1.7 μg/ml, 170.5 ± 6.6 μg/ml and 31.8 ± 2.2 μg/ml respectively. The reducing capability of AEQ was 6.9 ± 0.2 w/w % L-ascorbic acid equivalents in the FRAP assay. For hypotonic solution induced HEHA, the IC 50  was 1.79 ± 0.04 mg/ml. A significant decrease ( p  < 0.05) was observed in ALT, AST and LDH release from the liver slices treated with AEQ compared to the ethanol treated liver slices. A significant reduction in lipid peroxidation ( p  < 0.05) was also observed in liver slices treated with the plant extract compared to that of the ethanol treated liver slices.    Conclusions  The results suggest AEQ possess hepatoprotective activity against ethanol induced liver toxicity of porcine liver slices which can be attributed to antioxidant properties and membrane stabilizing effects caused by the plant material.    Electronic supplementary material  The online version of this article (doi:10.1186/s12906-016-1044-x) contains supplementary material, which is available to authorized users.

bmc complementary and alternative medicine

Evaluation of Hepatoprotective activity of Eriocaulon quinquangulare in vitro using porcine liver slices against ethanol induced liver toxicity and free radical scavenging capacity