Abstract:
Heavy metal toxicity contributes to liver and kidney dysfunction and damage through oxidative stress mechanisms; however, from
previous studies, extracts from the Vernonia amygdalina plant have shown to possess potent antioxidant properties. *is study was
aimed at uncovering the potential ameliorative effects of ethanolic extract from Vernonia amygdalina plant in heavy metal toxicityinduced
liver and kidney dysfunction. For this study, 44 Sprague Dawley rats were divided into three groups.*econtrol group received
a basal diet and water only while the treatment groups received varied dosages of the heavy metals.*ecopper (Cu) and lead (Pb) groups
had five subgroups. *e Cu only and Cu recovery subgroups were administered with 16 mg/kg Cu intraperitoneally daily for 14 days,
whereas the Pb only and Pb recovery subgroups were administered with 13 mg/kg Pb intraperitoneally daily for 14 days. Subsequently,
the Pb only and Cu only subgroups were sacrificed. *e three Pb and Cu treatment subgroups received oral graded doses (100 mg/kg,
200 mg/kg, and 300 mg/kg) of the extract for 21 days. *e Cu recovery and Pb recovery subgroups were left to recover for 21 days. After
histological examinations, the Pb and Cu pretreatment groups showed evidence of focal necrosis accompanied by inflammatory cell
infiltrations. *e serum levels of liver biomarkers AST, ALT, and GGT, as well as urea and creatinine, were significantly elevated
(P � 0.01) following copper and lead exposure. Upon posttreatment of the rats with the extract, the physiological levels of the
biomarkers were restored and tissue architecture of the organs improved. *us, the ethanolic extract of Vernonia amygdalina is capable
of ameliorating the effects of heavy metal toxicity through potent antioxidative mechanisms.
