Abstract
GEC1 protein shares high identity with GABARAP (GABA(A) Receptor-Associated Protein), interacts with tubulin and GABA(A) receptors and is potentially involved in intracellular transport processes. Recently, using quantitative real time PCR, we have reported the gec1 mRNA expression in different rat brain areas. In the present study, we investigated the cell types expressing gec1 in rat brain. Sense and anti-sense gec1 RNA probes, corresponding to the 3'-untranslated region, were generated. In northern blotting experiments, the anti-sense probe revealed only the 1.75 kb gec1 mRNAs. On the other hand, in immunohistochemistry experiments, GEC1 polyclonal antibodies did not discriminate between GEC1 and GABARAP proteins. Therefore, we used digoxigenin-labeled RNA probes for in situ hybridization (ISH) experiments to map the gec1 expression. Using the anti-sense probe, we detected the gec1 mRNAs specifically in neurons throughout the rostrocaudal extent of the brain as well as in the spinal cord. Although a majority of neurons expressed the gec1 mRNAs, different intensities of labeling were observed depending on the areas: the strongest labeling was observed in the isocortex, hippocampus, basal telencephalon, some thalamic and most ...Continue Reading
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