Kappa-opioids decrease excitatory transmission in the dentate gyrus of the guinea pig hippocampus.


In the guinea pig hippocampus, kappa 1-opioid binding sites were primarily localized in the molecular layer of the dentate gyrus as shown by autoradiography using either the kappa 1-selective radioligand 3H-U69,593 or the nonselective radioligand 3H-diprenorphine in the presence of unlabeled mu- and delta-blocking ligands. In this region, the… (More)


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