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Ardaillou N, Placier S, Striker L, Striker G, Ardaillou R. Mesangial cells from diabetic NOD mice constitutively express increased density of atrial natriuretic peptide C receptors. Kidney Int 1999; 55:1293-302. [PMID: 10200993 DOI: 10.1046/j.1523-1755.1999.00393.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND Experimental evidence shows that natriuretic peptides (NPs) play a pathophysiological role in the glomerular hemodynamic abnormalities that occur in diabetes mellitus. METHODS In this study, the cGMP response to NPs and the different subtypes of NP receptors were examined in mesangial cells derived from a genetic model of diabetes, the nonobese diabetic (NOD) mouse. Multiple mesangial cell lines were derived from diabetic (D-NOD) and nondiabetic (ND-NOD) adult mice and were studied at different passages. RESULTS cGMP accumulation after stimulation by atrial NP (ANP) or C-type NP (CNP) was markedly inhibited in D-NOD cells irrespective of the glucose concentration (6 or 20 mM) in the culture medium. In contrast, NP receptor density measured from [125I]-ANP saturation binding curves was 7.5 times greater in D-NOD than in ND-NOD cells. No change in KD (200 pM in both cell lines) was observed. Competitive inhibition studies showed that 4-23 C-ANP, which is specific of clearance receptors (NPR-C), displaced 90% of the maximum fraction bound, suggesting the predominance of NPR-C in both cell lines. Further identification was obtained from RNase protection assay and reverse transcription-polymerase chain reaction, which also demonstrated the higher expression of NPR-C mRNA in D-NOD cells. In contrast, NPR-A mRNA was not modified. Increased expression of NPR-C in D-NOD cells was associated with an increase of ANP internalization rate at 37 degrees C, indicating that these receptors were functional. CONCLUSIONS These studies demonstrate that the constitutive overexpression of NPR-C in D-NOD mesangial cells is associated with a decreased response of cGMP to ANP or CNP treatment. This could be due to the lesser availability of the peptides for binding to NPR-A or NPR-B or to an inhibitory effect on NP-dependent guanylate cyclase activity via the activation of NPR-C.
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Ledoux S, Dussaule JC, Chatziantoniou C, Ardaillou N, Vandermeersch S, Ardaillou R. Protein kinase A activity modulates natriuretic peptide-dependent cGMP accumulation in renal cells. THE AMERICAN JOURNAL OF PHYSIOLOGY 1997; 272:C82-9. [PMID: 9038814 DOI: 10.1152/ajpcell.1997.272.1.c82] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The purpose of this work was to examine whether the level of cAMP accumulation and protein kinase A (PKA) activity influence atrial natriuretic factor (ANF)-dependent guanosine 3',5'-cyclic monophosphate (cGMP) production in two renal cell types: rabbit cortical vascular smooth muscle cells (RCSMC) and SV-40-transformed human glomerular visceral epithelial cells (HGVEC-SV1). N-[2-(p-bromocinnamylamino)ethyl]- 5-isoquinolinesulfonamide (H-89), a PKA inhibitor, decreased ANF-stimulated cGMP production in RCSMC in a time- and concentration-dependent manner. ANF-stimulated cGMP production was markedly inhibited after prolonged 9- and 18-h incubations with 25 microM H-89 (52 and 65%, respectively) but was not altered after exposure of cells to this agent for 1 h. 1-(5-Isoquinolinylsulfonyl)-2-methylpiperazine and N-(2-[methylamino]ethyl)-5-isoquinolinesulfonamide, protein kinase inhibitors not selective for PKA, did not reproduce the effect of H-89, even at higher concentrations (50 and 100 microM). Cycloheximide (10 microM), a protein synthesis inhibitor, limited the inhibitory effect of H-89, although alone it did not modify the ANF-stimulated cGMP production. H-89 did not affect cGMP production when it was stimulated by SIN-1, a nitric oxide donor. Prolonged incubation (18 h) with 8-bromo cAMP or cholera toxin, an activator of Gs protein resulting in adenylate cyclase stimulation, enhanced ANF-dependent cGMP production by 225 and 176%, respectively. This stimulatory effect was blocked by 25 microM H-89. 125I-ANF binding to RCSMC at 4 degrees C was not affected by preincubation of the cells with H-89. There was a 44% decrease in the expression of ANF C receptors measured as the ANF-(4-23)-displaceable 125I-ANF binding at 37 degrees C, which could not, however, explain the inhibitory effect of H-89 on cGMP production. Modulation of ANF- and C-type natriuretic peptide-dependent cGMP production by H-89 and cholera toxin was also found in HGVEC-SV1 with the same characteristics as in RCSMC. Taken together, these results suggest that PKA activity controls the function of natriuretic peptide guanylate cyclase-coupled receptors in the two cell types studied. PKA-dependent inhibition of a negatively regulatory protein distinct from the receptor itself seems necessary for a full cGMP response.
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Affiliation(s)
- S Ledoux
- Institut National de la Santé et de la Recherche Médicale 64, Hôpital Tenon, Paris, France
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Wada A, Hasegawa M, Matsumoto K, Niidome T, Kawano Y, Hidaka Y, Padilla PI, Kurazono H, Shimonishi Y, Hirayama T. The significance of Ser1029 of the heat-stable enterotoxin receptor (STaR): relation of STa-mediated guanylyl cyclase activation and signaling by phorbol myristate acetate. FEBS Lett 1996; 384:75-7. [PMID: 8797807 DOI: 10.1016/0014-5793(96)00284-0] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
To characterize Ser1029 in STaR at a consensus sequence of phosphorylation site by PKC, two mutants of mS1029A with replacement of Ser1029 to Ala1029 and C delta 1029 lacking 22 amino acids including Ser1029 were prepared. Preincubation of the wild type-STaR (wt-STaR) transfectant with 1 microM PMA caused additional STa-mediated guanylyl cyclase (GC) activation compared to control, whereas the mS1029A- and C delta 1029-transfected cells did not show a similar enhanced GC activation by PMA. After metabolic labeling with [32P]phosphate, transfected cells with wt-STaR and mutants were incubated with 1 microM PMA. Subsequent 32P-radiolabeled proteins were immunoprecipitated using anti-STaR antibody, and analyzed by autoradiography after separation on SDS-PAGE. The immunoprecipitated wt-STaR but not mS1029A and C delta 1029 had a significant radioactivity. These results suggest that the effect of PMA on wt-STaR transfectants may be caused by phosphorylation of Ser1029. The C delta 1012 mutant, with further truncation (Gln1012-Phe1050) of the carboxy terminus, did not show STa-mediated GC activation. Based on these data, these 17 amino acids (Gln1012-Ala1028), essential for signaling of GC activation by STa, have an abundance of basic amino acids which might be functionally influenced by phosphorylation of Ser1029.
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Affiliation(s)
- A Wada
- Institute of Tropical Medicine, Nagasaki University, Japan
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Kishimoto I, Yoshimasa T, Suga S, Ogawa Y, Komatsu Y, Nakagawa O, Itoh H, Nakao K. Natriuretic peptide clearance receptor is transcriptionally down-regulated by beta 2-adrenergic stimulation in vascular smooth muscle cells. J Biol Chem 1994. [DOI: 10.1016/s0021-9258(18)46928-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Cao L, Zlock DW, Gardner DG. Differential regulation of natriuretic peptide receptor activity in vascular cells. Hypertension 1994; 24:329-38. [PMID: 8082940 DOI: 10.1161/01.hyp.24.3.329] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
We studied the regulation of the individual natriuretic peptide receptor subtypes by 12-O-tetradecanoylphorbol 13-acetate (TPA) and forskolin in cultured bovine aortic endothelial and smooth muscle cells. In cultured endothelial cells, 10(-8) mol/L TPA caused a reduction in atrial natriuretic peptide (ANP) receptor binding activity that was seen as early as 2 hours after the treatment and reached a maximum (88 +/- 3% of control) after 24 hours, whereas the inhibition of ANP-stimulated cyclic GMP (cGMP) accumulation peaked at 2 hours (62 +/- 13% of control) and returned to control levels after 12 hours. After 24 hours of forskolin (10(-4) mol/L) treatment, ANP binding activity fell to 47 +/- 6%, and cGMP accumulation was 52 +/- 11% of control. Northern blot analysis revealed that 10(-8) mol/L TPA suppressed natriuretic peptide C receptor transcript levels, and forskolin increased levels modestly after 24 hours of treatment. Natriuretic peptide A receptor transcript levels remained unchanged by either treatment. In cultured smooth muscle cells, 10(-8) mol/L TPA suppressed ANP binding activity and ANP-stimulated cGMP formation in a fashion similar to that seen in endothelial cells. TPA treatment also resulted in an inhibition of C-type natriuretic peptide-stimulated cGMP production (59 +/- 7% of control); however, this response persisted for as long as 24 hours after addition of the agonist. Treatment with 10(-4) mol/L forskolin produced a time-dependent inhibition of ANP binding activity and did not inhibit cGMP production stimulated by either ANP or C-type natriuretic peptide. In contrast to the effects seen with endothelial cells, TPA caused a dose-dependent stimulation of natriuretic peptide C receptor mRNA, whereas forskolin was inhibitory in smooth muscle cells. These results indicate that the effects of the kinase activators are a function of the individual receptor subtype as well as the cell in which it is expressed and imply a considerable degree of flexibility in the response to regulatory stimuli.
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MESH Headings
- Animals
- Aorta/cytology
- Aorta/metabolism
- Atrial Natriuretic Factor/antagonists & inhibitors
- Atrial Natriuretic Factor/metabolism
- Atrial Natriuretic Factor/pharmacology
- Cattle
- Cells, Cultured
- Colforsin/pharmacology
- Cyclic GMP/biosynthesis
- Dose-Response Relationship, Drug
- Endothelium, Vascular/cytology
- Endothelium, Vascular/metabolism
- Muscle, Smooth, Vascular/cytology
- Muscle, Smooth, Vascular/metabolism
- RNA, Messenger/metabolism
- Receptors, Atrial Natriuretic Factor/classification
- Receptors, Atrial Natriuretic Factor/drug effects
- Receptors, Atrial Natriuretic Factor/metabolism
- Tetradecanoylphorbol Acetate/pharmacology
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Affiliation(s)
- L Cao
- Metabolic Research Unit, University of California at San Francisco 94143
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Crane JK, Wehner MS, Bolen EJ, Sando JJ, Linden J, Guerrant RL, Sears CL. Regulation of intestinal guanylate cyclase by the heat-stable enterotoxin of Escherichia coli (STa) and protein kinase C. Infect Immun 1992; 60:5004-12. [PMID: 1360449 PMCID: PMC258269 DOI: 10.1128/iai.60.12.5004-5012.1992] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The heat-stable enterotoxin of Escherichia coli (STa) stimulates membrane-bound guanylate cyclase in intestinal epithelium and induces fluid and ion secretion. Using the T84 human colon carcinoma cell line as a model, we observed that phorbol esters markedly enhanced STa-stimulated cyclic GMP accumulation in T84 cells (C. S. Weikel, C. L. Spann, C. P. Chambers, J. K. Crane, J. Linden, and E. L. Hewlett, Infect. Immun. 58:1402-1407, 1990). In this study we document that the phorbol ester treatment increases 125I-STa-binding sites as well as membrane-bound guanylate cyclase activity in T84 cells and provide evidence that both effects are mediated by phosphorylation. Guanylate cyclase activity was increased approximately 50% in membranes prepared from intact T84 cells treated with phorbol-12,13-dibutyrate (beta-PDB) and after treatment of homogenates with beta-PDB in a manner dependent on ATP, MgCl2, and cytosol. Similarly, treatment of membranes with purified bovine brain protein kinase C in the presence of appropriate cofactors and beta-PDB resulted in an increase in STa-stimulated guanylate cyclase activity of about 70%. Likewise, the number of 125I-STa-binding sites was increased by about 25 to 40% in membranes prepared from intact cells or homogenates treated with beta-PDB; no effect on binding affinity (Kd = 0.15 nM) was noted. These experiments suggest that protein kinase C may phosphorylate the STa receptor-guanylate cyclase or a closely related protein and increase guanylate cyclase activity. The stimulatory effects of protein kinase C on STa-sensitive guanylate cyclase are opposite in direction to the profound inhibitory effects of the kinase on atrial natriuretic peptide-stimulated guanylate cyclase, demonstrating differential regulation by protein kinases within the guanylate cyclase-receptor family.
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Affiliation(s)
- J K Crane
- Department of Internal Medicine, University of Texas Health Sciences Center, Houston 77030
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Awazu M, Yared A, Swift LL, Hoover RL, Ichikawa I. Dietary fatty acid modulates glomerular atrial natriuretic peptide receptor. Kidney Int 1992; 42:265-71. [PMID: 1328748 DOI: 10.1038/ki.1992.285] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Modification of dietary fatty acid (FA) has been shown to affect the incidence of hypertension and coronary artery disease. We studied whether these effects involve changes in the receptor characteristics of vasoactive substance. Characteristics of atrial natriuretic peptide (ANP) receptors were examined in glomeruli isolated from rats fed a diet containing 5% in weight omega 6, 5% omega 3, 20% omega 6, 20% omega 3 polyunsaturated FA or 20% saturated FA (SFA) for greater than 4 weeks. The FA composition of phospholipids in isolated glomeruli showed an elevation in 20:4 omega 6 (arachidonic acid, AA) in 5% omega 6, 20% omega 6 and 20% SFA, and elevations in 20:5 omega 3 (eicosapentaenoic acid, EPA) in 5% omega 3 and 20% omega 3 groups. The radioligand binding study revealed: (1) in 20% FA group, receptor density (Ro, fmol/mg prot) of ANP was significantly decreased compared to 5% group (262 +/- 13, n = 8 to 120 +/- 13, n = 12) without changes in equilibrium dissociation constant (KD), (2) among high FA (20%) groups, type of FA was essential for determining Ro; higher omega 6 was associated with a lower ANP Ro (177 +/- 11 vs. 103 +/- 3 fmol/mg prot, P less than 0.05) and KD (0.43 +/- .04 vs. 0.27 +/- .02 nM, P less than 0.05). To examine whether the alteration in receptor characteristics is mediated by FA, effects of FA were examined in vitro. In cultured mesangial cells, AA, but not EPA, decreased Ro of ANP receptors (48.7 +/- 4.8% of control, P less than 0.05) without affecting KD.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- M Awazu
- Department of Pediatrics, Vanderbilt University School of Medicine, Nashville, Tennessee
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Yasunari K, Kohno M, Murakawa K, Yokokawa K, Horio T, Takeda T. Phorbol ester and atrial natriuretic peptide receptor response on vascular smooth muscle. Hypertension 1992; 19:314-9. [PMID: 1348239 DOI: 10.1161/01.hyp.19.4.314] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
At least two types of receptors for natriuretic peptides have been reported: biologically active receptors coupled with guanylate cyclase (atrial natriuretic peptide [ANP]-B receptors) and clearance receptors (ANP-C receptors). To elucidate the role of protein kinase C (PKC) in the regulation of ANP-B receptors, vascular smooth muscle cells in culture were treated with phorbol ester. Incubation with receptor agonists and phorbol ester led to the desensitization of receptor-mediated cyclic guanosine monophosphate (ANP-B receptor response) in rat vascular smooth muscle cells. Although a PKC inhibitor and downregulation of PKC by long-term incubation of cells with phorbol esters blocked the phorbol ester-induced desensitization of the ANP-B receptor response, they did not block the ANP-induced desensitization of the ANP-B receptor response. In addition, when desensitization by phorbol esters was observed, ANP was still capable of desensitization. These observations suggest that the mechanism for regulating ANP-B receptor sensitivity may be both PKC-dependent and PKC-independent and mediated by phorbol esters and ANP, respectively.
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Affiliation(s)
- K Yasunari
- First Department of Internal Medicine, Osaka City University Medical School, Japan
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9
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Chau LY. Protein kinase C is not involved in the desensitization of platelet activating factor receptor in rabbit platelets. Lipids 1991; 26:1076-9. [PMID: 1668108 DOI: 10.1007/bf02536505] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Rabbit platelets pretreated with platelet activating factor (PAF) became refractory to further stimulation by PAF. The effect was specific for PAF. In this study, the alteration in the specific agonist binding to PAF receptor in platelets following desensitization was investigated. As revealed by the Scatchard analysis of radioligand binding data, the affinity for specific PAF binding to desensitized platelet membranes was substantially lowered as compared with that to control platelet membranes. Guanine nucleotide triphosphate, which was shown to decrease the affinity of specific PAF binding to platelet membranes, had less effect on the PAF binding affinity to the desensitized preparation. In platelets pretreated with phorbol 12-myristate-13-acetate, the binding affinity of PAF receptor remained unaltered. Pretreatment of platelets with 1-(5-isoquinolinesulphonyl)-2-methylpiperazine, a protein kinase C inhibitor, or neomycin, an inhibitor of the polyphosphoinositide breakdown, failed to prevent the reduction of specific PAF binding affinity following subsequent exposure to PAF. These results suggest that the agonist-induced desensitization of PAF receptor in rabbit platelets is independent of activation of protein kinase C.
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Affiliation(s)
- L Y Chau
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan, Republic of China
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Hirata Y, Emori T, Ohta K, Shichiri M, Marumo F. Vasoconstrictor-induced heterologous down-regulation of vascular atrial natriuretic peptide receptor. Eur J Pharmacol 1989; 164:603-6. [PMID: 2548876 DOI: 10.1016/0014-2999(89)90273-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Long-term (24 h) pretreatment of cultured rat vascular smooth muscle cells with 100 nM angiotensin and 1 microM vasopressin induced a marked reduction of the maximal binding capacity of atrial natriuretic peptide (ANP) receptors in a fashion similar to that induced by phorbol ester. The down-regulation of the receptors induced by vasoconstrictors and phorbol ester was concomitantly associated with an attenuation of ANP-stimulated cGMP accumulation. These data suggest that vasoconstrictor-induced activation of protein kinase C is involved in the mechanism of heterologous down-regulation of vascular ANP receptors.
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Affiliation(s)
- Y Hirata
- Second Department of Internal Medicine, Tokyo Medical and Dental University, Japan
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