Role of inhibition of atrial natriuretic factor release in the down-regulation of salt excretion

Giuseppe Conte, Giulio Romano, Vincenzo Sepe, Luca De Nicola, Massimo Sabbatini, Domenico Russo, Bruno Memoli, Biagio Ungaro, Giorgio Fuiano, Alfredo Caglioti, Antonio Dal Canton

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Abstract

We investigated the role of atrial natriuretic factor (ANF) in the down-regulation of sodium excretion (UNaV). Seven subjects were sequentially studied while injesting a normal-salt diel (220 mmol NaCl/day, NSD), a very low-salt diet (20 mmol NaCl/day, VLSD) for six days, and again at NSD for nine days. After one day of VLSD, a negative salt balance of 85 mmol was achieved and plasma ANF decreased from 19.1 (SE 2.5) to 7.2 (SE 2.1) pg/ml, whereas plasma renin activity (PRA) and plasma aldosterone (ALD) increased after the third and second day, respectively. During restoration of volemia (NSD), ANF increased after the third day; in contrast, PRA and ALD decreased earlier. Seven other subjects kept at low-salt diet (50 mmol NaCl/day) were studied during ANF infusion (at 2, 4, 8 ng/min/kg body wt). Increases of ANF from 10.3 (SE 0.9) pg/ml (basal condition) to levels of 24.0 (SE 1.9) pg/ml (infusion study), occurring physiologically in the same subjects after NSD, evoked increases in UNaV that accounted for 62% of UNaV rise necessary to balance the NSD, whereas PRA or ALD did not change. Plasma ANF, unlike PRA or ALD, was directly correlated with UNaV. In conclusion: (a) ANF changes earlier than PRA and plasma aldosterone during VLSD; (b) PRA and ALD respond more promptly than ANF in the recovery from hypovolemia; (c) during ingestion of a low-salt diet, changes in plasma ANF by infusion account for more than half the increase in UNaV following the shift from low- to normal-salt diet independently of alterations in PRA and ALD.

Original languageEnglish
Pages (from-to)673-680
Number of pages8
JournalKidney International
Volume42
Issue number3
Publication statusPublished - Sep 1992

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Atrial Natriuretic Factor
Down-Regulation
Salts
Aldosterone
Renin
Sodium-Restricted Diet
Hypovolemia
Eating
Sodium
Diet

ASJC Scopus subject areas

  • Nephrology

Cite this

Conte, G., Romano, G., Sepe, V., De Nicola, L., Sabbatini, M., Russo, D., ... Dal Canton, A. (1992). Role of inhibition of atrial natriuretic factor release in the down-regulation of salt excretion. Kidney International, 42(3), 673-680.

Role of inhibition of atrial natriuretic factor release in the down-regulation of salt excretion. / Conte, Giuseppe; Romano, Giulio; Sepe, Vincenzo; De Nicola, Luca; Sabbatini, Massimo; Russo, Domenico; Memoli, Bruno; Ungaro, Biagio; Fuiano, Giorgio; Caglioti, Alfredo; Dal Canton, Antonio.

In: Kidney International, Vol. 42, No. 3, 09.1992, p. 673-680.

Research output: Contribution to journalArticle

Conte, G, Romano, G, Sepe, V, De Nicola, L, Sabbatini, M, Russo, D, Memoli, B, Ungaro, B, Fuiano, G, Caglioti, A & Dal Canton, A 1992, 'Role of inhibition of atrial natriuretic factor release in the down-regulation of salt excretion', Kidney International, vol. 42, no. 3, pp. 673-680.
Conte G, Romano G, Sepe V, De Nicola L, Sabbatini M, Russo D et al. Role of inhibition of atrial natriuretic factor release in the down-regulation of salt excretion. Kidney International. 1992 Sep;42(3):673-680.
Conte, Giuseppe ; Romano, Giulio ; Sepe, Vincenzo ; De Nicola, Luca ; Sabbatini, Massimo ; Russo, Domenico ; Memoli, Bruno ; Ungaro, Biagio ; Fuiano, Giorgio ; Caglioti, Alfredo ; Dal Canton, Antonio. / Role of inhibition of atrial natriuretic factor release in the down-regulation of salt excretion. In: Kidney International. 1992 ; Vol. 42, No. 3. pp. 673-680.
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abstract = "We investigated the role of atrial natriuretic factor (ANF) in the down-regulation of sodium excretion (UNaV). Seven subjects were sequentially studied while injesting a normal-salt diel (220 mmol NaCl/day, NSD), a very low-salt diet (20 mmol NaCl/day, VLSD) for six days, and again at NSD for nine days. After one day of VLSD, a negative salt balance of 85 mmol was achieved and plasma ANF decreased from 19.1 (SE 2.5) to 7.2 (SE 2.1) pg/ml, whereas plasma renin activity (PRA) and plasma aldosterone (ALD) increased after the third and second day, respectively. During restoration of volemia (NSD), ANF increased after the third day; in contrast, PRA and ALD decreased earlier. Seven other subjects kept at low-salt diet (50 mmol NaCl/day) were studied during ANF infusion (at 2, 4, 8 ng/min/kg body wt). Increases of ANF from 10.3 (SE 0.9) pg/ml (basal condition) to levels of 24.0 (SE 1.9) pg/ml (infusion study), occurring physiologically in the same subjects after NSD, evoked increases in UNaV that accounted for 62{\%} of UNaV rise necessary to balance the NSD, whereas PRA or ALD did not change. Plasma ANF, unlike PRA or ALD, was directly correlated with UNaV. In conclusion: (a) ANF changes earlier than PRA and plasma aldosterone during VLSD; (b) PRA and ALD respond more promptly than ANF in the recovery from hypovolemia; (c) during ingestion of a low-salt diet, changes in plasma ANF by infusion account for more than half the increase in UNaV following the shift from low- to normal-salt diet independently of alterations in PRA and ALD.",
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AU - Sabbatini, Massimo

AU - Russo, Domenico

AU - Memoli, Bruno

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