Protective effect of naproxen (non-selective COX-inhibitor) or rofecoxib (selective COX-2 inhibitor) on immobilization stress-induced behavioral and biochemical alterations in mice

European Journal of Pharmacology
Ashish DhirS K Kulkarni

Abstract

Chronic stress precipitates many neuropsychiatric disorders and alters the various oxidative stress parameters in brain. Cyclooxygenase (COX) is reported to play an important role in pathogenesis of various neurodegenerative disorders including stroke and seizures. In the present study, we examined the effect of naproxen (non-selective COX-inhibitor having much potency towards COX-I isoform) or rofecoxib (a selective COX-2 inhibitor) in subchronic immobilization stress. Mice were subjected to immobilized stress for 6 h daily for a period of seven days. Naproxen (7 mg/kg, i.p.) or rofecoxib (2 mg/kg, i.p.) was administered daily for 7 days before challenging them to immobilization stress. Behavioral analysis revealed the hyperlocomotor activity and increased anxiety response. Subchronic stress decreased percent retention of memory and also caused hyperalgesia in mice. Biochemical analysis revealed that chronic immobilization stress significantly increased lipid peroxidation and nitrite levels and decreased the reduced glutathione and adrenal ascorbic acid levels. Chronic treatment with naproxen or rofecoxib significantly attenuated the immobilization stress-induced behavioral and biochemical alterations. These results suggested ...Continue Reading

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