Journal
BIOLOGICAL & PHARMACEUTICAL BULLETIN
Volume 27, Issue 7, Pages 1081-1085Publisher
PHARMACEUTICAL SOC JAPAN
DOI: 10.1248/bpb.27.1081
Keywords
Polygala tenuifolia; tenuifoliside B; memory; passive avoidance performance; potassium cyanide (KCN); anoxia
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We studied the cognitive improving and cerebral protective constituents in the roots of Polygala tenuifolia WILLDENOW, a well-known Chinese traditional medicine prescribed for amnesia, neurasthenia, palpitation, noctural emission and insomnia. Tenuifoliside B (1), which is one of the acylated oligosaccharides in the roots of R tenuifolia, showed the cerebral protective effect on potassium cyanide (KCN)-induced anoxia in mice, widely used as an animal model for cerebrovascular disease, and also had an ameliorative effect on the scopolamine-induced impairment of performance in passive avoidance task in rats. Compound 1 significantly enhanced oxotremorine-induced tremors in mice, suggesting that it ameliorated the scopolamine-induced impairment of passive avoidance response by enhancing the cholinergic system. These findings show that compound I has cognitive improving and cerebral protective effects.
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