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- W2078755151 abstract "The involvement of somatostatin in the organization of cognitive functions was studied. We assessed changes in learning and memory processes by studying the effects of cysteamine, a compound that decreases somatostatin-like immunoreactivity in the brain, somatostatin and the potent somatostatin analogue, SMS 201-995, on active avoidance behaviour, assessed with a shuttle box apparatus, or on passive avoidance behaviour. Cysteamine induced a loss of the conditioned active avoidance response acquired after 3 weeks of daily trials. The effect was observed 2 h (−29%) and 4 h (−51%) after cysteamine treatment (300 mg/kg s.c.) and disappeared after 24 h. Intracerebroventricular administration of somatostatin or SMS 201-995 to cysteamine-treated rats significantly reversed the cysteamine effects on the conditioned avoidance responses. Similar results were obtained on passive avoidance behaviour. We also investigated the effect of cysteamine treatment on brain somatostatin-sensitive adenylate cyclase. We observed that adenylate cyclase activity in the frontal cortex of cysteamine-pretreated animals was more sensitive to inhibition by the SRIF analogue, SMS 201-995, than it was in control animals. This effect was observed at concentrations of SMS 201-995 that were ineffective in control tissue. These results show that disruption of somatostatinergic transmission affects cognitive functions of rats." @default.
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- W2078755151 date "1988-07-01" @default.
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- W2078755151 title "Somatostatin and SMS 201-995 reverse the impairment of cognitive functions induced by cysteamine depletion of brain somatostatin" @default.
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- W2078755151 doi "https://doi.org/10.1016/0014-2999(88)90536-5" @default.
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