RGD Reference Report - Dopamine D1/D5 receptors gate the acquisition of novel information through hippocampal long-term potentiation and long-term depression. - Rat Genome Database

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Dopamine D1/D5 receptors gate the acquisition of novel information through hippocampal long-term potentiation and long-term depression.

Authors: Lemon, N  Manahan-Vaughan, D 
Citation: Lemon N and Manahan-Vaughan D, J Neurosci. 2006 Jul 19;26(29):7723-9.
RGD ID: 1600981
Pubmed: PMID:16855100   (View Abstract at PubMed)
PMCID: PMC6674280   (View Article at PubMed Central)
DOI: DOI:10.1523/JNEUROSCI.1454-06.2006   (Journal Full-text)

Hebbian learning models require that neurons are able to both strengthen and weaken their synaptic connections. Hippocampal synaptic plasticity, in the form of long-term potentiation (LTP) and long-term depression (LTD), has been implicated in both spatial memory formation as well as novelty acquisition. In addition, the ventral tegmental area-hippocampal loop has been proposed to control the entry of information into long-term memory, whereas the dopaminergic system is believed to play an important role in information acquisition and synaptic plasticity. D1/D5 dopamine receptors are positively coupled to adenylyl cyclase and have been to modulate certain forms of synaptic plasticity, particularly in vitro. We investigated how D1/D5 dopamine receptors modify long-lasting synaptic plasticity at CA1 synapses of adult freely moving rats and found that receptor activation lowered the threshold for the induction of both LTP and LTD. Specific types of learning are associated with specific types of hippocampal synaptic plasticity. We found that object-configuration learning, facilitation of late-phase LTD by object exploration, and late-phase LTP by exploration of empty space were all prevented by D1/D5 receptor antagonism. Furthermore, receptor antagonism prevented electrically induced late-LTP, whereas receptor activation facilitated induction of both LTP and LTD by patterned electrical stimulation. These findings suggest that the dopaminergic system, acting via D1/D5 receptors, gates long-term changes in synaptic strength and that these changes are a critical factor in the acquisition of novel information.

Gene-Chemical Interaction Annotations    Click to see Annotation Detail View
TermQualifierEvidenceWithReferenceNotesSourceOriginal Reference(s)
SCH 23390 affects bindingISODrd1 (Rattus norvegicus)1600981; 1600981SCH 23390 binds to Drd1 proteinRGD 
SCH 23390 affects bindingEXP 1600981SCH 23390 binds to Drd1 proteinRGD 

Gene Ontology Annotations    Click to see Annotation Detail View

Molecular Function
TermQualifierEvidenceWithReferenceNotesSourceOriginal Reference(s)
heterocyclic compound binding  IPISCH 233901600981 RGD 

Objects Annotated

Genes (Rattus norvegicus)
Drd1  (dopamine receptor D1)

Genes (Mus musculus)
Drd1  (dopamine receptor D1)

Genes (Homo sapiens)
DRD1  (dopamine receptor D1)

Objects referenced in this article
Gene DRD5 dopamine receptor D5 Homo sapiens
Gene Drd5 dopamine receptor D5 Mus musculus
Gene Drd5 dopamine receptor D5 Rattus norvegicus

Additional Information