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Panax Quinquefolium Attenuates Depression-like Behavior Through Modulating Nitric Oxide Pathway In Olfactory Bulbectomized Rats | 12552
ISSN: 2161-0460

Journal of Alzheimers Disease & Parkinsonism
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Panax quinquefolium attenuates depression-like behavior through modulating nitric oxide pathway in olfactory bulbectomized rats

International Conference on Psychology, Autism and Alzheimers Disease

Puneet Rinwa

Accepted Abstracts: J Alzheimers Dis Parkinsonism

DOI: 10.4172/2161-0460.S1.004

Abstract
Olfactory bulbectomy (OBX) is a well known screening model for depression. Panax quinquefolium (PQ) is known for its therapeutic potential against several psychiatric disorders. Nitric oxide (NO), an intercellular messenger has been suggested to play a major role in the pathogenesis of depression. The present study was designed to explore the possible involvement of NO mechanism in the protective effect of PQ against olfactory bulbectomy induced depression. Wistar rats were bulbectomized surgically and kept for a rehabilitation period of two weeks. PQ (50, 100 and 200 mg/kg; p.o.) alone and in combination with NO modulators like L-NAME (10 mg/kg, i.p.) and L-arginine (100 mg/kg; i.p.) were then administered daily for another two weeks. Ablation of olfactory bulbs caused depression-like symptoms as evidenced by increased immobility time in forced swim test, hyperactivity in open field arena, and anhedonic like response in sucrose preference test. Further, OBX caused elevation in serum corticosterone levels and increased oxidative-nitrosative damage. These deficits were integrated with increased levels of inflammatory cytokines (TNF-?), apoptotic factor (caspase-3) and a marked reduction in neurogenesis factor (BDNF) in both cortex and hippocampus region of bulbectomized rat brains. Treatment with PQ significantly and dose-dependently restored the behavioral, biochemical and molecular alterations associated with OBX. Further, pretreatment of L-NAME with subeffective dose of PQ (100 mg/kg) significantly potentiated its protective effects; however L-arginine pretreatment reversed their beneficial effects. Present study suggests that protective effect of Panax quinquefolium might be due to possible modulation of nitric oxide pathway against olfactory bulbectomy-induced depression.
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