Abstract:
:The striatum plays important motor, associative and cognitive roles in brain functions. However, the rodent dorsolateral (the primate putamen) and dorsomedial (the primate caudate nucleus) striatum are not anatomically separated, making it difficult to distinguish their functions. By contrast, anatomical separation exists between the caudate nucleus and putamen in primates. Here, we successfully decreased dopamine D1 receptor (D1R) or D2R mRNA expression levels selectively in the marmoset caudate using shRNA knockdown techniques, as determined using positron emission tomography imaging with specific D1R and D2R ligands and postmortem in situ hybridization analysis. We then conducted a voxel-based correlation analysis between binding potential values of PET imaging and visual discrimination learning task performance in these genetically modified marmosets to find a critical role for the caudate D2R but no apparent role for the caudate D1R. This latter finding challenges the current understanding of the mechanisms underlying D1R activation in the caudate.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Takaji M,Takemoto A,Yokoyama C,Watakabe A,Mizukami H,Ozawa K,Onoe H,Nakamura K,Yamamori Tdoi
10.1038/srep35809subject
Has Abstractpub_date
2016-11-02 00:00:00pages
35809issn
2045-2322pii
srep35809journal_volume
6pub_type
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