Abstract
Gibberellic acid (GA3) was used extensively unaware in agriculture in spite of its dangerous effects on human health. The current study was designed to investigate the ameliorative effects of the co-administration of phycocyanin with GA3 induced oxidative stress and histopathological changes in the liver. Forty male albino rats were randomly divided into four groups. Group I (control group) received normal saline for 6 weeks, Group II (GA3 treated group) received 3.85 mg/kg body weight GA3 once daily for 6 weeks, Group III (phycocyanin treated group) received Phycocyanin 200 mg/kg body weight/day for 6 weeks orally dissolved in distilled water and Group IV was treated with GA3 and phycocyanin at the same doses as groups 2 and 3. All treatments were given daily using intra-gastric intubation and continued for 6 weeks. Our results revealed significant downregulation of antioxidant enzyme activities and their mRNA levels (CAT, GPx and Cu-Zn, SOD) with marked elevation of liver enzymes and extensive fibrous connective tissue deposition with large biliary cells in hepatic tissue of GA3 treated rats, while treatment with phycocyanin improved the antioxidant defense system, liver enzymes and structural hepatocytes recovery in phycocyanin treated group with GA3. These data confirm the antioxidant potential of Phycocyanin and provide strong evidence to support the co-administration of Phycocyanin during using GA3.
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