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Induction of nitric oxide synthase regulates atrial natriuretic peptide receptors in vascular smooth muscle cells. 1993

J Kato, and T P Misko, and M G Currie
Department of Molecular Pharmacology, Monsanto Corporate Research, St. Louis, MO 63167.

In a previous study, we reported that cyclic GMP (cGMP) selectively down-regulates the atrial natriuretic peptide clearance receptor (ANPC receptor) in the vascular endothelial cells. The aim of the present study is to determine whether nitric oxide (NO) regulates ANP receptor by accumulating intracellular cGMP in cultured rabbit aortic smooth muscle cells. Treatment with interleukin-1 beta (IL-1), a cytokine known to induce NO synthase, dose-dependently increased the basal level of intracellular cGMP with a concomitant increase of nitrite in the conditioned media. These effects of IL-1 were attenuated in the presence of N omega-nitro-L-arginine. IL-1 (40 pM) significantly (P < 0.01) decreased [125I]atriopeptin III binding to the cells, an effect that was inhibited by N omega-nitro-L-arginine. Treatment with sodium nitroprusside (SNP) which releases NO also decreased [125I]atriopeptin III binding to the cells. In addition, further decrease in [125I]atriopeptin III binding following IL-1 or SNP treatment was observed in the presence of 0.1 mM zaprinast, a cGMP-specific phosphodiesterase inhibitor. Scatchard analysis of the binding data in the treated cells showed a decrease in Bmax without a significant change in Kd. Affinity cross-linking of [125I]atriopeptin III to the treated cells demonstrated a decrease in 70-kDa band corresponding to the ANPC receptor. MEanwhile, intracellular cGMP response to atriopeptin III was significantly (P < 0.01) enhanced in the cells pretreated with IL-1 or SNP despite the decrease in receptor density. These findings suggest that NO down-regulates the ANPC receptor by the accumulation of intracellular cGMP in cultured rabbit aortic smooth muscle cells.(ABSTRACT TRUNCATED AT 250 WORDS)

UI MeSH Term Description Entries
D007375 Interleukin-1 A soluble factor produced by MONOCYTES; MACROPHAGES, and other cells which activates T-lymphocytes and potentiates their response to mitogens or antigens. Interleukin-1 is a general term refers to either of the two distinct proteins, INTERLEUKIN-1ALPHA and INTERLEUKIN-1BETA. The biological effects of IL-1 include the ability to replace macrophage requirements for T-cell activation. IL-1,Lymphocyte-Activating Factor,Epidermal Cell Derived Thymocyte-Activating Factor,Interleukin I,Macrophage Cell Factor,T Helper Factor,Epidermal Cell Derived Thymocyte Activating Factor,Interleukin 1,Lymphocyte Activating Factor
D009131 Muscle, Smooth, Vascular The nonstriated involuntary muscle tissue of blood vessels. Vascular Smooth Muscle,Muscle, Vascular Smooth,Muscles, Vascular Smooth,Smooth Muscle, Vascular,Smooth Muscles, Vascular,Vascular Smooth Muscles
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
D009573 Nitrites Salts of nitrous acid or compounds containing the group NO2-. The inorganic nitrites of the type MNO2 (where M Nitrite
D009599 Nitroprusside A powerful vasodilator used in emergencies to lower blood pressure or to improve cardiac function. It is also an indicator for free sulfhydryl groups in proteins. Nitroferricyanide,Sodium Nitroprusside,Cyanonitrosylferrate,Ketostix,Naniprus,Nipride,Nipruton,Nitriate,Nitropress,Nitroprussiat Fides,Nitroprusside, Disodium Salt,Nitroprusside, Disodium Salt, Dihydrate,Disodium Salt Nitroprusside,Nitroprusside, Sodium
D010446 Peptide Fragments Partial proteins formed by partial hydrolysis of complete proteins or generated through PROTEIN ENGINEERING techniques. Peptide Fragment,Fragment, Peptide,Fragments, Peptide
D011817 Rabbits A burrowing plant-eating mammal with hind limbs that are longer than its fore limbs. It belongs to the family Leporidae of the order Lagomorpha, and in contrast to hares, possesses 22 instead of 24 pairs of chromosomes. Belgian Hare,New Zealand Rabbit,New Zealand Rabbits,New Zealand White Rabbit,Rabbit,Rabbit, Domestic,Chinchilla Rabbits,NZW Rabbits,New Zealand White Rabbits,Oryctolagus cuniculus,Chinchilla Rabbit,Domestic Rabbit,Domestic Rabbits,Hare, Belgian,NZW Rabbit,Rabbit, Chinchilla,Rabbit, NZW,Rabbit, New Zealand,Rabbits, Chinchilla,Rabbits, Domestic,Rabbits, NZW,Rabbits, New Zealand,Zealand Rabbit, New,Zealand Rabbits, New,cuniculus, Oryctolagus
D002478 Cells, Cultured Cells propagated in vitro in special media conducive to their growth. Cultured cells are used to study developmental, morphologic, metabolic, physiologic, and genetic processes, among others. Cultured Cells,Cell, Cultured,Cultured Cell
D003432 Cross-Linking Reagents Reagents with two reactive groups, usually at opposite ends of the molecule, that are capable of reacting with and thereby forming bridges between side chains of amino acids in proteins; the locations of naturally reactive areas within proteins can thereby be identified; may also be used for other macromolecules, like glycoproteins, nucleic acids, or other. Bifunctional Reagent,Bifunctional Reagents,Cross Linking Reagent,Crosslinking Reagent,Cross Linking Reagents,Crosslinking Reagents,Linking Reagent, Cross,Linking Reagents, Cross,Reagent, Bifunctional,Reagent, Cross Linking,Reagent, Crosslinking,Reagents, Bifunctional,Reagents, Cross Linking,Reagents, Cross-Linking,Reagents, Crosslinking
D004790 Enzyme Induction An increase in the rate of synthesis of an enzyme due to the presence of an inducer which acts to derepress the gene responsible for enzyme synthesis. Induction, Enzyme

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