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Neonatal rat atrial ANF patterns should not guide practice; leaves open developmental regulation of natriuretic peptides in humans.
Atrial cardiocytes from newborn (2-5 day old) and adult rats were cultured and the secretory patterns of atrial natriuretic factor (ANF) from isolated right and left atrial cells were investigated by radioimmunoassay. Newborn atrial cardiocytes from the left atrium consistently secreted larger amounts of ANF than those from the right with a peak on the 6th day and a decrease up to the 12th day. In contrast, adult atrial cardiocytes secreted much less ANF and this decreased to very low levels from the 3rd day up to the 12th day in culture although ANF was present in measurable amounts in these cells.
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Cantin et al. (1985) studied this question.
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