Abstract
The mammalian cardiac atrium has recently been shown to contain numerous peptides that exert marked effects on kidney function and vascular resistance1–9. With one exception, the peptides have potent natriuretic and diuretic activities, and sequence similarities suggest that they may be derived from a common atrial natriuretic factor (ANF) precursor10–14. The exception, cardiodilatin (CDD), differs from the ANF peptides in possessing potent vasorelaxant activity, but not natriuretic and diuretic activities9. Here we report the cloning and sequence analysis of the cDNA for the human precursor protein (preproCDD–ANF) containing both the CDD and ANF sequences. The CDD sequence represents the N-terminal sequence preceded directly by a signal peptide, while the ANF sequence is present at the C-terminal end of the protein. Using hybridization analysis, we further show that the amount of rat preproCDD–ANF mRNA, which is synthesized selectively in the atria but not the ventricles, markedly decreases on water deprivation, suggesting that the water–electrolyte balance may be an important factor in the regulation of the expression of the preproCDD–ANF gene.
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Nakayama, K., Ohkubo, H., Hirose, T. et al. mRNA sequence for human cardiodilatin–atrial natriuretic factor precursor and regulation of precursor mRNA in rat atria. Nature 310, 699–701 (1984). https://doi.org/10.1038/310699a0
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DOI: https://doi.org/10.1038/310699a0
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