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Effects of hypertonic saline infusion and water drinking on atrial peptide. 1986

F J Salazar, and J P Granger, and M L Joyce, and J C Burnett, and A A Bove, and J C Romero

This study was undertaken to define the changes in plasma levels of atrial natriuretic peptide (ANP) induced by hypertonic saline infusion followed by spontaneous water drinking and to determine whether these changes in ANP are correlated with changes in right atrial pressure (RAP) and plasma levels of vasopressin (AVP). Conscious dogs (n = 5) were infused with hypertonic saline (6%) at a rate of 1.4 ml/min for 4 h. Water was withheld for the first 2 h and administered ad libitum for the final 2 h. Hypertonic saline infusion induced increases (P less than 0.05) in plasma osmolality (posM), pAVP, mean arterial pressure (MAP), and RAP (1.9 +/- 0.6 to 3.1 +/- 0.7 mmHg). These changes were accompanied by an increase of pANP (68 +/- 14 to 120 +/- 33 pg/ml, P less than 0.05). Spontaneous water drinking (1,410 +/- 127 ml) returned posM and pAVP to control levels and produced a further and significant increment in RAP (150%) and pANP (100%). During the water-drinking phase MAP was not further altered, and hematocrit decreased by 11.1% (P less than 0.05). A positive linear correlation (P less than 0.001) was found between increases in RAP and pANP. The administration of an AVP vasopressor antagonist in a similar protocol, and before hypertonic saline infusion, inhibited the increase of MAP, but it did not alter the changes of posM, hematocrit, RAP, nor pANP. These results suggest that changes in the release of ANP during increases in posM and after spontaneous water drinking are predominantly controlled by changes in RAP.(ABSTRACT TRUNCATED AT 250 WORDS)

UI MeSH Term Description Entries
D007700 Kinetics The rate dynamics in chemical or physical systems.
D008297 Male Males
D009320 Atrial Natriuretic Factor A potent natriuretic and vasodilatory peptide or mixture of different-sized low molecular weight PEPTIDES derived from a common precursor and secreted mainly by the HEART ATRIUM. All these peptides share a sequence of about 20 AMINO ACIDS. ANF,ANP,Atrial Natriuretic Peptide,Atrial Natriuretic Peptides,Atriopeptins,Auriculin,Natriuretic Peptides, Atrial,ANF (1-126),ANF (1-28),ANF (99-126),ANF Precursors,ANP (1-126),ANP (1-28),ANP Prohormone (99-126),ANP-(99-126),Atrial Natriuretic Factor (1-126),Atrial Natriuretic Factor (1-28),Atrial Natriuretic Factor (99-126),Atrial Natriuretic Factor Precursors,Atrial Natriuretic Factor Prohormone,Atrial Natriuretic Peptide (1-126),Atrial Pronatriodilatin,Atriopeptigen,Atriopeptin (1-28),Atriopeptin (99-126),Atriopeptin 126,Atriopeptin Prohormone (1-126),Cardiodilatin (99-126),Cardiodilatin Precursor,Cardionatrin I,Cardionatrin IV,Prepro-ANP,Prepro-CDD-ANF,Prepro-Cardiodilatin-Atrial Natriuretic Factor,Pro-ANF,ProANF,Proatrial Natriuretic Factor,Pronatriodilatin,alpha ANP,alpha-ANP Dimer,alpha-Atrial Natriuretic Peptide,beta-ANP,beta-Atrial Natriuretic Peptide,gamma ANP (99-126),gamma-Atrial Natriuretic Peptide,Natriuretic Peptide, Atrial,Peptide, Atrial Natriuretic,Peptides, Atrial Natriuretic,Prepro ANP,Prepro CDD ANF,Prepro Cardiodilatin Atrial Natriuretic Factor,Pro ANF,alpha ANP Dimer,alpha Atrial Natriuretic Peptide,beta ANP,beta Atrial Natriuretic Peptide,gamma Atrial Natriuretic Peptide
D001794 Blood Pressure PRESSURE of the BLOOD on the ARTERIES and other BLOOD VESSELS. Systolic Pressure,Diastolic Pressure,Pulse Pressure,Pressure, Blood,Pressure, Diastolic,Pressure, Pulse,Pressure, Systolic,Pressures, Systolic
D004285 Dogs The domestic dog, Canis familiaris, comprising about 400 breeds, of the carnivore family CANIDAE. They are worldwide in distribution and live in association with people. (Walker's Mammals of the World, 5th ed, p1065) Canis familiaris,Dog
D004326 Drinking The consumption of liquids. Water Consumption,Water Intake,Drinkings
D005260 Female Females
D006400 Hematocrit The volume of packed RED BLOOD CELLS in a blood specimen. The volume is measured by centrifugation in a tube with graduated markings, or with automated blood cell counters. It is an indicator of erythrocyte status in disease. For example, ANEMIA shows a low value; POLYCYTHEMIA, a high value. Erythrocyte Volume, Packed,Packed Red-Cell Volume,Erythrocyte Volumes, Packed,Hematocrits,Packed Erythrocyte Volume,Packed Erythrocyte Volumes,Packed Red Cell Volume,Packed Red-Cell Volumes,Red-Cell Volume, Packed,Red-Cell Volumes, Packed,Volume, Packed Erythrocyte,Volume, Packed Red-Cell,Volumes, Packed Erythrocyte,Volumes, Packed Red-Cell
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D001127 Arginine Vasopressin The predominant form of mammalian antidiuretic hormone. It is a nonapeptide containing an ARGININE at residue 8 and two disulfide-linked cysteines at residues of 1 and 6. Arg-vasopressin is used to treat DIABETES INSIPIDUS or to improve vasomotor tone and BLOOD PRESSURE. Argipressin,Vasopressin, Arginine,Arg-Vasopressin,Argipressin Tannate,Arg Vasopressin

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