AI Article Synopsis
- - The D2 dopamine receptor (Drd2) is linked to various brain disorders and is the main target for treatments related to schizophrenia and Parkinson's disease, but its expression in rats has not been well studied.
- - Using CRISPR/Cas9 technology, researchers created two new rat strains to visualize Drd2 expression, enabling the generation of Drd2 reporter rats that can express a fluorescent protein when Drd2 is active.
- - The study found significant differences in Drd2 expression patterns between these new rat models and existing mouse models, providing valuable insights for future research on the role of Drd2 in rat brains.
Article Abstract
The D2 dopamine receptor (Drd2) is implicated in several brain disorders such as schizophrenia, Parkinson's disease, and drug addiction. Drd2 is also the primary target of both antipsychotics and Parkinson's disease medications. Although the expression pattern of Drd2 is relatively well known in mouse brain, the temporal and spatial distribution of Drd2 is lesser clear in rat brain due to the lack of Drd2 reporter rat lines. Here, we used CRISPR/Cas9 techniques to generate two knockin rat lines: Drd2::Cre and Rosa26::loxp-stop-loxp-tdTomato. By crossing these two lines, we produced Drd2 reporter rats expressing the fluorescence protein tdTomato under the control of the endogenous Drd2 promoter. Using fluorescence imaging and unbiased stereology, we revealed the cellular expression pattern of Drd2 in adult and postnatal rat forebrain. Strikingly, the Drd2 expression pattern differs between Drd2 reporter rats and Drd2 reporter mice generated by BAC transgene in prefrontal cortex and hippocampus. These results provide fundamental information needed for the study of Drd2 function in rat forebrain. The Drd2::Cre rats generated here may represent a useful tool to study the function of neuronal populations expressing Drd2.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6499762 | PMC |
| http://dx.doi.org/10.1007/s00429-018-01824-2 | DOI Listing |
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