Potential Hepatoprotective Activity of Super Critical Carbon Dioxide Olive Leaf Extracts against CCl(4)-Induced Liver Damage

Virgin olive oil has demonstrated its effective activity against oxidative stress. However, data on the bioactive effect of olive leaves or their major constituents on the liver are scarce. The present research work was conducted to evaluate the hepatoprotective effects of supercritical carbon dioxide (SC-CO(2)) extracts from fresh and dried olive leaves on hepatotoxicity caused by carbon tetrachloride (CCl(4)) in rat models. For this purpose, healthy albino rats of 180–250 g weight were used. The assessment of biochemical markers was carried out on blood and liver tissue. Then, a histopathological study was carried out on liver tissue. The obtained results showed that fresh and dried olive leaf extracts ameliorate the perturbed biochemical parameters caused by CCl(4) treatment. Furthermore, the results registered for the histopathological study are in accordance with the biochemical parameters and the protective capacity of SC-CO(2) extracts against DNA damage, indicating that olive leaf extracts helped to improve liver fibrosis caused by CCl(4) treatment.