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Journal of Neuroscience, Vol 11, 3388-3397, Copyright © 1991 by Society for Neuroscience

ARTICLE

Differential expression of synaptophysin and synaptoporin mRNAs in the postnatal rat central nervous system

B Marqueze-Pouey, W Wisden, ML Malosio and H Betz
Zentrum fur Molekulare Biologie Heidelberg, Universitat Heidelberg, Germany.

Synaptophysin and synaptoporin are two homologous integral membrane proteins of small synaptic vesicles. Here, the distribution of the corresponding transcripts in the CNS of the rat was investigated by in situ hybridization using sequence-specific oligonucleotide probes. Synaptophysin mRNA was abundantly distributed through all major brain regions, whereas synaptoporin transcripts displayed a more restricted localization in telencephalic structures. Resolution at the cellular level disclosed a differential labeling of distinct cell types in different areas, suggesting that synaptophysin and synaptoporin are expressed by specific subpopulations of central neurons. Consistent with this conclusion, relative synaptoporin mRNA contents were found to vary between different brain regions during postnatal development, whereas synaptophysin transcripts showed a more uniform increase during the same period.

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