BIOASSAY GUIDED HEPATOPROTECTIVE ACTIVITY OF POLYGONATUM CIRRHIFOLIUM AGAINST ISONIAZID AND RIFAMPICIN INDUCED HEPATOTOXICITY IN RATS

Abstract

The present investigation was performed to examine the hepatoprotective effect of the aqueous ethanolic extract of Polygonatum cirrhifolium in antitubercular drug-induced liver damage. P. cirrhifolium rhizomes were crushed, dissolved in various solvents (in order of polarity), and then tested for phytochemicals. Based on their findings, mass extraction utilizing the ethanol-water mixture (50: 50) was carried out using the Soxhlet method. The doses for animal research were established through acute toxicity tests. The hepatoprotective potential of aqueous ethanolic extract (50:50) of rhizomes was determined in Wistar rats at doses of 200 mg kg-1 and 400 mg kg-1 p.o. per day. Blood samples were examined for the biochemical markers SGOT, SGPT, ALP, total bilirubin, and albumin. Histopathology of the liver was also conducted followed by in vitro anti-oxidant studies. Simultaneously, the extract was subjected to LCMS characterization. P. cirrhifolium extract at both the doses 200 mg kg-1 and 400 mg kg-1 has shown significant hepatoprotective activity against hepatotoxicity induced by INH+ RIF in a dose-dependent manner, as depicted by the significant changes in the values of blood biomarkers and in vitro anti-oxidant studies. Histopathological studies showed that the treatment with 200 mg kg-1 and 400 mg kg-1 of P. cirrhifolium exhibited regeneration of liver architecture and portal system by reducing the haemorrhage and inflammatory infiltrate. LC-MS characterization showed serpentine, 5-hydroxy methylfurfural and cephalotaxine as active constituents. It can be inferred that hydroethanolic extract of P. cirrhifolium protects the liver from anti-TB induced toxicity and this protection could be due to the active phytoconstituents.