Abstract
Objective: This study aimed to evaluate the possible effects of chlorpyrifos on the rat
hippocampus and evaluate whether these effects can be decreased with chrysin co-administration in an
animal model.
Methods: Male Wistar rats were randomly divided into 5 groups; Control (C), Chlorpyrifos (CPF),
Chlorpyrifos + Chrysin (12.5 mg/kg) (CPF + CH1), Chlorpyrifos + Chrysin (25 mg/kg) (CPF + CH2),
Chlorpyrifos + Chrysin (50 mg/kg) (CPF + CH3). After 45 days, hippocampus tissues were evaluated
by biochemical and histopathological tests.
Results: Biochemical findings indicated that CPF and CPF plus CH administration could not
significantly change SOD activity, and MAD, GSH, and NO levels in the hippocampus tissue of
animals versus controls. Histopathological findings of the toxic effects of CPF on hippocampus tissue
as evidenced by inflammatory cell infiltration, degeneration/necrosis, and mild hyperemia. CH could
ameliorate these histopathological changes in a dose-dependent manner.
Conclusion: In conclusion, CH was effective against histopathological damage induced by CPF in the
hippocampus through modulating inflammation and apoptosis.
Graphical Abstract
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