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- W2071778946 abstract "The effect of dynorphin A-(1-13), an endogenous kappa-opioid receptor agonist, on memory dysfunctions induced by transient cerebral ischemia in mice was investigated by using three different tasks, namely, spontaneous alternation, elevated plus-maze performance, and passive avoidance behavior. Transient ischemia produced a marked memory dysfunction in mice, as assessed in the three tasks, which were carried out consecutively 1 to 3 days after the ischemic insult. The i.c.v. injection of dynorphin A-(1-13) before the ischemic insult potently prevented the impairment of spontaneous alternations, the prolongation of transfer latency in the elevated plus-maze and the shortening of step-through latency in the passive avoidance task induced by transient ischemia. Dynorphin A-(1-13) (10 micrograms), however, did not affect the body temperature of the sham-operated or the ischemic mice. The protective effect of dynorphin A-(1-13) (10 micrograms) on ischemia-induced memory dysfunctions observed in the three tasks was almost completely reversed by pretreatment with nor-binaltorphimine (4 micrograms, i.c.v.), a kappa-selective opioid receptor antagonist. These results suggest that dynorphin A-(1-13) prevents memory dysfunctions in ischemic mice through the activation of kappa-opioid receptors." @default.
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- W2071778946 date "1993-03-01" @default.
- W2071778946 modified "2023-10-18" @default.
- W2071778946 title "Dynorphin A-(1–13) potently prevents memory dysfunctions induced by transient cerebral ischemia in mice" @default.
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- W2071778946 doi "https://doi.org/10.1016/0014-2999(93)90699-i" @default.
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