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Environmental Science and Pollution Research
Springer
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This study investigated the possible protective role of mulberry leaf (MLE) and olive leaf (OLE) ethanolic extracts against
paracetamol (PTL)–induced liver injury in rats compared to silymarin as a reference drug. Initially, MLE and OLE were
characterized using gas chromatography–mass spectrometry (GC/MS). Then, forty male Sprague Dawley rats were divided
into fve groups: the negative control group orally received distilled water for 35 days, the PTL-treated group (PTG) received
500 mg PTL/kg b. wt. for 7 days, the MLE-treated group (MLTG) received 400 mg MLE/kg b. wt., the OLE-treated group
(OLTG) received 400 mg OLE/kg b. wt., and the silymarin-treated group (STG) received 100 mg silymarin/kg b. wt. The
last three groups received the treatment for 28 days, then PTL for 7 days. The GC–MS characterization revealed that MLE
comprised 19 constituents dominated by ethyl linoleate, phytol, hexadecanoic acid, ethyl ester, and squalene. Moreover, OLE
comprised 30 components, and the major components were 11-eicosenoic acid, oleic acid, phytol, and à-tetralone. MLE
and OLE signifcantly corrected the PTL-induced normocytic normochromic anemia, leukocytosis, hypercholesterolemia,
and hypoproteinemia. Moreover, the MLE and OLE pretreatment considerably suppressed the PTL-induced increment in
serum levels of hepatic enzymes, including alkaline phosphatase, alanine aminotransferase, and aspartate aminotransferase.
Furthermore, the PTL-induced depletion in antioxidant enzymes, including glutathione peroxidase, superoxide dismutase,
and catalase, and the rise in hepatic malondialdehyde content were signifcantly reversed by the MLE and OLE pretreatment. Besides, MLE and OLE pretreatment signifcantly protected the hepatic tissue against PTL-induced DNA damage,
pathological perturbations, and increased caspase 3 and CYP2E1 immunoexpression. Of note, OLTG showed better enhancement of most indices rather than MLTG. Conclusively, these fndings imply that OLE, with its antioxidant and antiapoptotic
capabilities, is superior to MLE in protecting against PTL-induced liver injury.
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