Expression of RGS2, RGS4 and RGS7 in the developing postnatal brain

The European Journal of Neuroscience
Tatsuya Ingi, Yaeko Aoki

Abstract

The abundant expression of RGS (regulator of G-protein signalling) proteins in neurons, together with their modulatory function on G-protein-dependent neurotransmission, provides the basis for cellular adaptation to sensory inputs. To identify the molecular mechanism involved in the sensory experience-induced neural development, we performed a systematic survey of the localization of mRNAs encoding three subtypes of the RGSs (RGS2, RGS4 and RGS7) in developing rat brains by in situ hybridization through postnatal day 2 (P2), P10 and P18 to adult. The most dramatic changes of expression patterns were observed in the discrete neuronal cell layers of the cerebral neocortex (for RGS2 and 4), the hippocampus (for RGS2, 4 and 7), the thalamus (for RGS4) and the cerebellum (for RGS2 and 7). In the neocortex, RGS2 mRNA was enriched in the superficial cortical plate at P2, in contrast to RGS4, which was enriched in more mature neurons of the deeper layer V and VI. In the hippocampus, the neuronal cell layer-specific expression pattern of RGS2 developed from P2 to P18. RGS4 expression was temporarily confined to the CA pyramidal cell layer and not detectable in the dentate gyrus at P10 and P18. Similarly, a high level of expression of RG...Continue Reading

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Citations

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