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Cell-specific expression of mRNAs encoding Na+,K(+)-ATPase alpha- and beta-subunit isoforms within the rat central nervous system



Cell-specific expression of mRNAs encoding Na+,K(+)-ATPase alpha- and beta-subunit isoforms within the rat central nervous system



Proceedings of the National Academy of Sciences of the United States of America 88(16): 7425-7429



We have used in situ hybridization histochemistry to analyze the subcellular distribution of mRNAs encoding Na,K-ATPase alpha- and beta-subunit isoforms in the rat central nervous system. Substantial differences in the cell-specific pattern of expression were found for the genes encoding three isoforms of the alpha subunit. Transcripts of alpha 1-subunit gene were detected in virtually all cell types and structures examined. Expression of alpha 2-subunit mRNA was characteristic of glia, whereas alpha 3-subunit transcripts were predominant in neurons. Transcripts encoding the beta 1 subunit were detected in neurons, whereas beta 2-subunit mRNA expression was characteristic of glia. mRNA encoding both beta-subunit isoforms was present in choroidal epithelial cells. The distribution pattern of alpha- and beta-subunit mRNAs in structures throughout the central nervous system is consistent with the possibility of six structurally distinct Na+,K(+)-ATPase isoenzymes.

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Accession: 039483160

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PMID: 1651505

DOI: 10.1073/pnas.88.16.7425


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