This study aims to evaluate the possible ameliorative effect of earthworm (Allolobophora caliginosa) extract (EE) against silicon dioxide nanoparticles (SiNPs)-induced liver injury in male albino rats. The effectiveness of EE was compared with silymarin as a standard hepatoprotective drug. The present work demonstrates the antioxidant activity of EE by 1,1-diphenyl-2-picrylhydrazyl assay. Administration of SiNPs, for 15 consecutive days, caused changes in most of the biochemical parameters, namely, serum aminotransferase enzymes activities (alanine transaminase and aspartate transaminase), alkaline phosphatase activity, total protein, total and direct bilirubin level, malondialdehyde, glutathione reduced, catalase, superoxide dismutase, glutathione reductase, and glutathione peroxidase. In addition, administration of SiNPs induced changes in liver tissue architecture. Administration of EE, for subsequent 30 days, to SiNPs exposure demonstrated significant ameliorative effects on nearly all the studied parameters, and such effects were compatible with those of silymarin. In addition, the administration of EE repairs, to some extent, the abnormal architecture of the liver tissue induced by SiNPs.
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