Cannabinoid Type 1 Receptor is Undetectable in Rodent and Primate Cerebral Neural Stem Cells but Participates in Radial Neuronal Migration.

International Journal of Molecular Sciences
Yury M MorozovPasko Rakic

Abstract

Cannabinoid type 1 receptor (CB1R) is expressed and participates in several aspects of cerebral cortex embryonic development as demonstrated with whole-transcriptome mRNA sequencing and other contemporary methods. However, the cellular location of CB1R, which helps to specify molecular mechanisms, remains to be documented. Using three-dimensional (3D) electron microscopic reconstruction, we examined CB1R immunolabeling in proliferating neural stem cells (NSCs) and migrating neurons in the embryonic mouse (Mus musculus) and rhesus macaque (Macaca mulatta) cerebral cortex. We found that the mitotic and postmitotic ventricular and subventricular zone (VZ and SVZ) cells are immunonegative in both species while radially migrating neurons in the intermediate zone (IZ) and cortical plate (CP) contain CB1R-positive intracellular vesicles. CB1R immunolabeling was more numerous and more extensive in monkeys compared to mice. In CB1R-knock out mice, projection neurons in the IZ show migration abnormalities such as an increased number of lateral processes. Thus, in radially migrating neurons CB1R provides a molecular substrate for the regulation of cell movement. Undetectable level of CB1R in VZ/SVZ cells indicates that previously suggeste...Continue Reading

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Citations

Oct 3, 2021·Nature·Mikihito ShibataNenad Sestan

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Methods Mentioned

BETA
nuclear translocation
light microscopy
electron microscopy
cesarean sections

Software Mentioned

Reconstruct

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