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 RESEARCH ARTICLE
Year : 2015  |  Volume : 47  |  Issue : 1  |  Page : 39-44

Combination of Spirulina with glycyrrhizin prevents cognitive dysfunction in aged obese rats


Department of Neurochemistry, National Institute of Mental Health and Neurosciences, Bangalore, Karnataka, India

Correspondence Address:
Dr. Sarada Subramanian
Department of Neurochemistry, National Institute of Mental Health and Neurosciences, Bangalore, Karnataka
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0253-7613.150327

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Objectives: To evaluate the cognition enhancing effect of the combination of Spirulina and glycyrrhizin in monosodium glutamate (MSG)-induced obese aged rats. Materials and Methods: Obesity was induced in rats by administration of MSG (intraperitoneally, 4 mg/g body weight) for 14 consecutive days from day 1 after birth. Subsequently, the animals were allowed to grow for 18 months with food and water ad libitum. Hypercholesterolemia, hyperglycemia, leptin resistance, were monitored in these animals. Cognitive status was assessed by Barne's maze task and hippocampal acetylcholinesterase (AChE) levels. Further, the animals were treated with Spirulina (Sp) (oral route, 1 g/Kg body weight, for 30 days) alone or glycyrrhizin (Gly) alone (intraperitoneal route, 0.1 mg/Kg, on day 15 and day 21), or their combination (SpGly). Counting of the treatment days was done by considering first day of Sp administration as day 1. After the completion of 30 days of Spirulina treatment or 2 doses of Gly administration or the combination (SpGly) treatment, the animals were left for 3 weeks. They were then were assessed for their biochemical and cognitive changes. Results: The combination of Sp with Gly showed a significant reduction (P < 0.0001) in glucose, cholesterol, leptin levels in the serum with improvement in cognitive functions with concomitant reduction in AChE activity in the hippocampal tissue homogenates (P < 0.0001) of the obese rats. Conclusion: SpGly combination has a potential role in reversing cognitive dysfunctions associated with aging and obesity.






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