PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 18294632-0 2008 Chronic administration of morphine is associated with a decrease in surface AMPA GluR1 receptor subunit in dopamine D1 receptor expressing neurons in the shell and non-D1 receptor expressing neurons in the core of the rat nucleus accumbens. Morphine 26-34 glutamate ionotropic receptor AMPA type subunit 1 Rattus norvegicus 81-86 18294632-3 2008 Immunogold electron microscopy was used to quantify the surface expression of the AMPA GluR1 subunit in dendritic profiles of neurons in the Acb in response to intermittent 14-day non-contingent injections of escalating doses of morphine, a model that parallels opioid self-administration. Morphine 229-237 glutamate ionotropic receptor AMPA type subunit 1 Rattus norvegicus 87-92 18294632-6 2008 We provide the first report that chronic morphine administration is associated with a receptor-phenotypic decrease in surface trafficking of GluR1 in Acb subregions. Morphine 41-49 glutamate ionotropic receptor AMPA type subunit 1 Rattus norvegicus 141-146 18294632-7 2008 When compared to saline injected animals, morphine produced a decrease in plasma membrane GluR1 labeling in medium- and large-sized D1R expressing dendritic profiles in the Acb shell. Morphine 42-50 glutamate ionotropic receptor AMPA type subunit 1 Rattus norvegicus 90-95 18294632-9 2008 These results indicate that chronic intermittent injection of escalating doses of morphine is accompanied by ultrastructural plasticity of GluR1 in neurons that are responsive to glutamate and dopamine-induced D1R activation in the Acb shell, and neurons capable of responding to glutamate but not D1R receptor stimulation in the Acb core. Morphine 82-90 glutamate ionotropic receptor AMPA type subunit 1 Rattus norvegicus 139-144