Raisins: A kitchen cabinet item can restores the liver function and structure

Area of Science:

• Pharmacology
• Hepatology
• Phytochemistry

Background:

• Carbon tetrachloride (CCl4) is a common toxin used to induce experimental liver injury.
• Hepatotoxicity involves structural and functional damage to the liver, often accompanied by oxidative stress.
• Natural products are increasingly investigated for their therapeutic potential in liver diseases.

Purpose of the Study:

• To evaluate the hepatoprotective and antioxidant potential of an aqueous methanol extract of raisins (Vitis vinifera).
• To investigate the effect of raisin extract on carbon tetrachloride (CCl4)-induced liver damage in a rat model.
• To identify key phytochemicals responsible for the observed hepatoprotective effects.

Main Methods:

• Induction of hepatotoxicity in rats using carbon tetrachloride (CCl4).
• Administration of varying doses (400 and 800 mg/kg) of raisin extract to test groups.
• Assessment of liver function markers, enzyme levels, oxidative stress indicators (reduced glutathione, lipid peroxidation), and total bilirubin/albumin ratio.
• Histopathological examination of liver tissues.
• Spectrophotometric and high-performance liquid chromatography (HPLC) methods to quantify total phenolic content, gallic acid, and rutin.

Main Results:

• Raisin extract treatment significantly improved body weight and liver index in hepatotoxic rats.
• The extract normalized liver and bile duct enzymes, conjugative and synthetic markers, and reduced glutathione levels.
• Significant increase in percent inhibition of lipid peroxidation was observed in groups treated with raisin extract.
• Histopathological analysis confirmed the restoration of normal liver architecture in treated groups.
• Silymarin (100 mg/kg) served as a positive control, showing comparable effects.
• Gallic acid and rutin were identified as major phenolic compounds in the raisin extract.

Conclusions:

• The aqueous methanol extract of raisins possesses significant hepatoprotective, regenerative, and antioxidant properties against CCl4-induced liver injury.
• The observed effects are likely attributed to the total phenolic content, particularly gallic acid and rutin, present in the extract.
• Raisins represent a promising natural source for developing therapeutic agents for liver protection and regeneration.