(Hypertension. 2000;35:19.)
© 2000 American Heart Association, Inc.
Scientific Contributions |
From the Division of Hypertension, Department of Medicine (T.H., S.T.), and Research Institute (T.N., F.Y., H.M., K.K.), National Cardiovascular Center, Suita, Osaka, Japan.
Correspondence to Takeshi Horio, MD, Division of Hypertension, Department of Medicine, National Cardiovascular Center, 5-7-1, Fujishirodai, Suita, Osaka 565-8565, Japan. E-mail thorio{at}jsc.ri.ncvc.go.jp
| Abstract |
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-actin, ß-myosin heavy chain,
and ANP genes, markers of hypertrophy, were partially
elevated by treatment with HS-1421 (100 µg/mL) under nonstimulated
or PE-stimulated conditions. A cGMP-specific phosphodiesterase
inhibitor, zaprinast (5x10-4 mol/L), and a
cGMP analogue (10-4 mol/L) suppressed the basal and
PE-stimulated protein syntheses. Our observations suggest that
endogenous ANP inhibits cardiac myocyte
hypertrophy under basal and PE-stimulated conditions,
probably through a cGMP-dependent process. ANP may play a role as an
autocrine factor in the regulation of cardiac myocyte growth.
Key Words: hypertrophy atrial natriuretic peptide autocrine-paracrine myocytes
| Introduction |
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Subsequent studies have revealed the existence of natriuretic peptide receptors in cardiac cells.4 5 Therefore, apart from acting as a circulating hormone, ANP may have some function as an autocrine and/or paracrine factor. However, the local actions of ANP on the heart itself have not been fully elucidated. Oliver et al6 recently demonstrated with the use of knockout mouse models that the complete absence of one subtype of natriuretic peptide receptors causes marked cardiac hypertrophy, suggesting the possibility that endogenous ANP suppressively regulates the development of cardiac myocyte hypertrophy. With regard to the direct effect of ANP on cardiac hypertrophy, only one study7 reported that exogenous ANP inhibits cardiac myocyte hypertrophy in the limited conditions. Therefore, we conducted the present study to examine the direct effect of endogenous ANP on cell hypertrophy in cultured ventricular myocytes of neonatal rats. We used a specific antagonist for natriuretic peptide receptors, HS-1421, which competitively and selectively inhibits ANP binding to its biological (guanylyl cyclase [GC]-containing) receptor.8 Several studies have used this antagonist to examine the roles of endogenous ANP in vivo and in vitro.9 10 11 12 We also investigated whether endogenous ANP influences the expression of fetal-type contractile protein genes in addition to the protein synthesis in cultured cardiac myocytes. The participation of cellular cGMP in the effect of ANP on protein synthesis was also examined.
| Methods |
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Protein Synthesis and Cell Size Measurement
The effect of various agents on the protein synthesis in
cultured cardiac myocytes was evaluated by the incorporation of
[14C]phenylalanine
(14C-Phe) into cells, according to the method
described by Simpson16 with some modifications. Myocytes
were plated on 24-well plates mainly at a density of
6x104 cells/cm2. Several
experiments were performed at a density of
1.5x104 cells/cm2. After
the preconditioning period, HS-1421 (a gift from Kyowa Hakko Kogyo,
Tokyo, Japan), phenylephrine (PE, Research Biochemicals,
Inc), endothelin-1 (ET, Peptide Institute), FCS, zaprinast (Biomol
Research Laboratories), 3-isobutyl-1-methylxanthine (IBMX, Nacalai
Tesque), 8-bromo-cGMP (Sigma), 8-bromo-cAMP (Sigma), and/or rat ANP
(Peptide Institute) were added, and 0.3 µCi of
14C-Phe was also added. After the cells were
incubated for 24 hours, the radioactivity of aliquots of the
trichloroacetic acidinsoluble material was determined by a liquid
scintillation counter.
For cell size measurement, 2 or 3 fields in phase-contrast pictures of cultured cardiac myocytes were randomly chosen and photographed, and 50 individual cell surface areas were measured by planimetry.
Northern Blot Analysis
After a 24-hour incubation with treatment of HS-1421 and/or
PE, the cultured myocytes were submitted for RNA extraction. Total RNA
was extracted from cultured cells with TRIzol Reagent (Life
Technologies). Northern blot analyses were performed with
oligonucleotide probes for rat skeletal
-actin mRNA,
ß-myosin heavy chain (ß-MHC) mRNA, and 18S ribosomal RNA and with a
cDNA probe for rat ANP mRNA, according to the method previously
reported.13 17 18
Measurement of Cellular cGMP
After preincubation, myocytes grown in 24-well plates were
treated for 10 minutes with various concentrations of rat ANP, rat
brain natriuretic peptide (BNP, Peptide Institute), and/or
HS-1421 in the presence of 5x10-4 mol/L IBMX,
as described previously.19 The reaction was stopped by
rapid aspiration of the medium and the addition of ice-cold 70%
ethanol. After each ethanol sample was evaporated by a centrifugal
evaporator, the dry residue was dissolved in an assay buffer. The cGMP
levels were determined by a radioimmunoassay performed with a cGMP
assay kit (Yamasa Shoyu Co), as previously reported.20
Measurement of Immunoreactive ANP and BNP
After cardiac myocytes were treated with HS-1421 and/or PE for
24 hours, the culture medium was aspirated and stored at -80°C. The
radioimmunoassay for rat ANP and BNP was performed as previously
reported.21
Statistical Analysis
Unpaired t test was used for comparison between the 2
groups. The significance of differences among >3 groups was evaluated
by an unpaired ANOVA, and probability values were calculated by the
Fisher method. A value of P<0.05 was accepted as
statistically significant.
| Results |
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10 pmol and 1 pmol per
105 cells, respectively. PE
(10-5 mol/L), ET (10-7
mol/L), and 5% FCS stimulated the secretions of ir-ANP and ir-BNP from
cardiac myocytes. Both the basal and stimulated levels of ir-ANP and
ir-BNP in the medium were significantly increased by HS-1421 (100
µg/mL).
|
The cellular cGMP levels in cultured myocytes were increased
dose-dependently after treatment with 10-9 to
10-6 mol/L ANP (Figure 1A). BNP as well as ANP increased the
cellular cGMP levels, and the effect of BNP on cGMP production
was almost equivalent to that of ANP (data not shown). HS-1421
decreased the basal level of cGMP and also inhibited the elevation of
cellular cGMP stimulated by 10-8 mol/L ANP
(Figure 1B and 1C). This inhibition by HS-1421 of the
ANP-induced cGMP production was concentration dependent and
almost complete at doses
100 µg/mL.
|
HS-1421 elevated the basal level of 14C-Phe incorporation into myocytes at doses of 30 to 300 µg/mL (maximal increase 42%) (Figure 2A). The 14C-Phe incorporation was increased by stimulation with 10-5 mol/L PE, and the PE-induced incorporation of 14C-Phe was further increased by HS-1421 in a concentration-dependent manner (maximal increase 73%). The increase in protein synthesis by HS-1421 (100 µg/mL) was also observed under ET- or FCS-stimulated conditions (Table 2). In addition, HS-1421 induced the significant increase in the cell surface area of myocytes under both nonstimulated and PE-stimulated conditions, in proportion to the increase in protein synthesis (Figure 2B).
|
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The expression level of skeletal
-actin mRNA in cardiac myocytes
treated with HS-1421 was significantly higher than that of the
controls (Figure 3B). PE elevated the
skeletal
-actin gene expression, but a further increase in its level
was not obtained by the addition of HS-1421. The expression of
ß-MHC mRNA was elevated by HS-1421 under PE-treated conditions
(Figure 3C). The mRNA level of ANP was increased by HS-1421
under both nonstimulated and PE-stimulated conditions (Figure 3D).
|
To elucidate whether the inhibitory effect of
endogenous ANP on myocyte hypertrophy is
causally linked to the increase in cellular cGMP, we examined the
effects of 2 phosphodiesterase inhibitors on protein
synthesis in cultured cardiac myocytes. A cGMP-specific
phosphodiesterase inhibitor, zaprinast, and a nonspecific
inhibitor, IBMX, elevated the cellular cGMP levels at doses
10-4 mol/L, in the presence of
10-8 mol/L ANP (data not shown). Both zaprinast
(5x10-4 mol/L) and IBMX
(5x10-4 mol/L) significantly decreased the
14C-Phe incorporation into cells (Figure 4A). The extent of the decrease in
14C-Phe incorporation by these
inhibitors was larger in PE-stimulated myocytes than in
nontreated cells. The effect of exogenous cGMP on protein synthesis was
also examined. A cGMP analogue, 8-bromo-cGMP
(10-4 mol/L), diminished the basal and
PE-stimulated 14C-Phe uptake into cells (Figure 4B). In contrast, 8-bromo-cAMP (10-3
mol/L) slightly but significantly elevated the uptake of
14C-Phe only in PE-stimulated cells.
|
As shown in Figure 5A, exogenous ANP (10-7 to 10-6 mol/L) did not inhibit the 14C-Phe incorporation into cultured myocytes incubated at a density of 6x104 cells/cm2, which is the cell density used in other experiments in the present study. However, the increased uptake of 14C-Phe by treatment with 50 µg/mL HS-1421 was suppressed significantly by 10-6 mol/L ANP (Figure 5C). When cultured cells were prepared at a low density (1.5x104 cells/cm2), the 14C-Phe incorporation levels under both basal and PE-stimulated conditions were decreased by 10-6 mol/L ANP (Figure 5B).
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| Discussion |
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Three receptor subtypes for natriuretic peptides are presently known.22 23 Two of these receptors have GC activity and are called GC-A and GC-B.3 22 Although HS-1421 is a competitive antagonist for both GC-A and GC-B,8 the observed increase in protein synthesis by this antagonist in the present study appears to be mainly through a GC-A blockade, because rat ventricular myocytes have been reported to produce predominantly GC-A.5 Among the 3 members of the natriuretic peptide family (ANP, BNP, and C-type natriuretic peptide), both BNP and ANP combine with GC-A.3 22 In fact, we confirmed that BNP has an effect that is almost equivalent to the effect of ANP on the production of cellular cGMP in cultured cardiac myocytes. However, the secretion level of ANP in neonatal rat ventricular myocytes was much higher than that of BNP. Therefore, the induction of cell hypertrophy by HS-1421 obtained in the present study may be due mainly to a blockade of endogenous ANP.
Oliver et al6 recently reported that hypertension and
cardiac hypertrophy were found in GC-A knockout mice; these
mice lacking GC-A had elevated blood pressure and hearts exhibiting
marked hypertrophy with interstitial fibrosis.
Mice homozygous for disruption of the pro-ANP gene have no circulating
or tissue ANP, and they exhibit increased heart weight and blood
pressure when maintained on intermediate salt diets.24
Transgenic mice overexpressing ANP have a low heart weight under
normoxic conditions and a blunted right ventricular
hypertrophy response to hypoxia-induced
pulmonary hypertension.25 These observations
suggest that ANP may be closely associated with the progression of
myocardial hypertrophy. However, the issue of whether the
influence of ANP on cardiac hypertrophy is a direct effect
of its peptide or secondary to the change of blood pressure levels was
not resolved by these studies using knockout or transgenic mice. With
regard to the direct effect of ANP on cardiac hypertrophy,
a very recent report (Calderone et al7 ) has shown that
exogenous ANP and cGMP inhibit the protein synthesis of neonatal
cardiomyocytes under limited conditions, that is, in
norepinephrine-stimulated cells cultured at a low density
(1 to 2x104 cells/cm2).
The study of Calderone et al and another study26 showed
that the inhibitory effect of cGMP was absent in cells
cultured at a high density (1x105
cells/cm2). Therefore, the study of Calderone et
al could not determine whether endogenous ANP may have an
inhibitory effect on myocyte hypertrophy. Our
present study demonstrates that endogenous ANP has a
direct action on myocyte hypertrophy, independent of the
hemodynamic change, in the cells cultured even at a
high density and, furthermore, under both PE-stimulated and
nonstimulated (basal) conditions. In addition, the present results
have shown that myocyte hypertrophy produced by the
blockade of endogenous ANP by HS-1421 is partially
accompanied by increases in the expression of skeletal
-actin,
ß-MHC, and ANP genes, which are genetic markers for
cardiomyocyte hypertrophy. These results
indicate that endogenous ANP may influence the growth of
neonatal cardiac myocytes with qualitative changes.
Regarding the mechanism of inhibitory effect of ANP on cellular hypertrophy, we have obtained some evidence of a causal relation between cGMP production and inhibition of cell hypertrophy by ANP. ANP markedly increased the cGMP levels in cells, and a cGMP-specific phosphodiesterase inhibitor and a cGMP analogue suppressed the basal and PE-stimulated protein syntheses. These results suggest that endogenous ANP and exogenous ANP inhibit the protein synthesis in cardiac myocytes, probably through a cGMP-dependent process. We cannot deny the possibility that the increase in the cellular cGMP level after treatment with a cGMP-specific phosphodiesterase inhibitor may be derived not only from endogenous ANP but also from endogenous nitric oxide. However, the cGMP production in the presence of a considerable amount of ANP is thought to be derived mostly from ANP, because the cellular cGMP production in the presence of 10-8 mol/L ANP was inhibited almost completely by HS-1421.
In the present study, both the increase in protein synthesis by HS-1421 and its decrease by phosphodiesterase inhibitors were greater in PE-stimulated myocytes than in nonstimulated cells. These data indicate that the effects of endogenous ANP and cGMP are probably accelerated by the stimulation with PE. Some studies have shown that ANP also inhibits the catecholamine-induced and growth factorinduced DNA synthesis of cultured rat cardiac fibroblasts.4 7 27 Although ANP expression is minimal in normal adult ventricular myocardium, cardiac overload and hypertrophy induce ANP production in the ventricles.28 29 30 31 In human failing or hypertrophied hearts, the expression of ANP is remarkably induced, and considerable levels of its peptide are detected in the ventricles.28 29 30 These findings lead to the possibility that endogenous ANP plays a role as an autocrine and/or paracrine inhibitory regulator against excessive cardiac cell growth in some pathological states, such as heart failure and cardiac hypertrophy. However, the present study was performed with the use of cultured neonatal, not adult, cardiac myocytes of rats, as in many other studies. Alternatively, it is possible that ANP regulates the myocardial growth during development, in view of the fact that fetal and neonatal myocardium express the ANP gene and peptide even in the normal state.13 28 32 Further investigations are necessary to clarify the physiological and pathophysiological effects of endogenous ANP on cardiac myocytes.
| Acknowledgments |
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Received April 13, 1999; first decision May 6, 1999; accepted August 23, 1999.
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J. Luo, J. R. McMullen, C. L. Sobkiw, L. Zhang, A. L. Dorfman, M. C. Sherwood, M. N. Logsdon, J. W. Horner, R. A. DePinho, S. Izumo, et al. Class IA Phosphoinositide 3-Kinase Regulates Heart Size and Physiological Cardiac Hypertrophy Mol. Cell. Biol., November 1, 2005; 25(21): 9491 - 9502. [Abstract] [Full Text] [PDF] |
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J. B. Patel, M. L. Valencik, A. M. Pritchett, J. C. Burnett Jr., J. A. McDonald, and M. M. Redfield Cardiac-specific attenuation of natriuretic peptide A receptor activity accentuates adverse cardiac remodeling and mortality in response to pressure overload Am J Physiol Heart Circ Physiol, August 1, 2005; 289(2): H777 - H784. [Abstract] [Full Text] [PDF] |
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M. Nakanishi, Y. Saito, I. Kishimoto, M. Harada, K. Kuwahara, N. Takahashi, R. Kawakami, Y. Nakagawa, K. Tanimoto, S. Yasuno, et al. Role of Natriuretic Peptide Receptor Guanylyl Cyclase-A in Myocardial Infarction Evaluated Using Genetically Engineered Mice Hypertension, August 1, 2005; 46(2): 441 - 447. [Abstract] [Full Text] [PDF] |
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T. Tokudome, T. Horio, I. Kishimoto, T. Soeki, K. Mori, Y. Kawano, M. Kohno, D. L. Garbers, K. Nakao, and K. Kangawa Calcineurin-Nuclear Factor of Activated T Cells Pathway-Dependent Cardiac Remodeling in Mice Deficient in Guanylyl Cyclase A, a Receptor for Atrial and Brain Natriuretic Peptides Circulation, June 14, 2005; 111(23): 3095 - 3104. [Abstract] [Full Text] [PDF] |
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T. Nishikimi, J. R. Hagaman, N. Takahashi, H.-S. Kim, H. Matsuoka, O. Smithies, and N. Maeda Increased susceptibility to heart failure in response to volume overload in mice lacking natriuretic peptide receptor-A gene Cardiovasc Res, April 1, 2005; 66(1): 94 - 103. [Abstract] [Full Text] [PDF] |
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J. C. Y. Chan, O. Knudson, F. Wu, J. Morser, W. P. Dole, and Q. Wu Hypertension in mice lacking the proatrial natriuretic peptide convertase corin PNAS, January 18, 2005; 102(3): 785 - 790. [Abstract] [Full Text] [PDF] |
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M Jankowski, D Wang, S Mukaddam-Daher, and J Gutkowska Pregnancy alters nitric oxide synthase and natriuretic peptide systems in the rat left ventricle J. Endocrinol., January 1, 2005; 184(1): 209 - 217. [Abstract] [Full Text] [PDF] |
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V. Franco, Y.-F. Chen, S. Oparil, J. A. Feng, D. Wang, F. Hage, and G. Perry Atrial Natriuretic Peptide Dose-Dependently Inhibits Pressure Overload-Induced Cardiac Remodeling Hypertension, November 1, 2004; 44(5): 746 - 750. [Abstract] [Full Text] [PDF] |
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A Luchner and H Schunkert Interactions between the sympathetic nervous system and the cardiac natriuretic peptide system Cardiovasc Res, August 15, 2004; 63(3): 443 - 449. [Abstract] [Full Text] [PDF] |
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T. Tokudome, T. Horio, M. Fukunaga, H. Okumura, J. Hino, K. Mori, F. Yoshihara, S.-I. Suga, Y. Kawano, M. Kohno, et al. Ventricular Nonmyocytes Inhibit Doxorubicin-Induced Myocyte Apoptosis: Involvement of Endogenous Endothelin-1 as a Paracrine Factor Endocrinology, May 1, 2004; 145(5): 2458 - 2466. [Abstract] [Full Text] [PDF] |
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T. Tokudome, T. Horio, T. Soeki, K. Mori, I. Kishimoto, S.-i. Suga, F. Yoshihara, Y. Kawano, M. Kohno, and K. Kangawa Inhibitory Effect of C-Type Natriuretic Peptide (CNP) on Cultured Cardiac Myocyte Hypertrophy: Interference between CNP and Endothelin-1 Signaling Pathways Endocrinology, May 1, 2004; 145(5): 2131 - 2140. [Abstract] [Full Text] [PDF] |
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J. Magga, M. Puhakka, S. Hietakorpi, K. Punnonen, P. Uusimaa, J. Risteli, O. Vuolteenaho, H. Ruskoaho, and K. Peuhkurinen Atrial natriuretic peptide, B-type natriuretic peptide, and serum collagen markers after acute myocardial infarction J Appl Physiol, April 1, 2004; 96(4): 1306 - 1311. [Abstract] [Full Text] [PDF] |
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I. E. Konstantinov, J. G. Coles, C. Boscarino, M. Takahashi, J. Goncalves, J. Ritter, and G. S. Van Arsdell Gene expression profiles in children undergoing cardiac surgery for right heart obstructive lesions J. Thorac. Cardiovasc. Surg., March 1, 2004; 127(3): 746 - 754. [Abstract] [Full Text] [PDF] |
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T. Mori, Y.-F. Chen, J. A. Feng, T. Hayashi, S. Oparil, and G. J Perry Volume overload results in exaggerated cardiac hypertrophy in the atrial natriuretic peptide knockout mouse Cardiovasc Res, March 1, 2004; 61(4): 771 - 779. [Abstract] [Full Text] [PDF] |
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R. B. Pilz and D. E. Casteel Regulation of Gene Expression by Cyclic GMP Circ. Res., November 28, 2003; 93(11): 1034 - 1046. [Abstract] [Full Text] [PDF] |
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D. Wang, S. Oparil, J. A. Feng, P. Li, G. Perry, L. B. Chen, M. Dai, S. W.M. John, and Y.-F. Chen Effects of Pressure Overload on Extracellular Matrix Expression in the Heart of the Atrial Natriuretic Peptide-Null Mouse Hypertension, July 1, 2003; 42(1): 88 - 95. [Abstract] [Full Text] [PDF] |
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V. A. Cameron and L. J. Ellmers Minireview: Natriuretic Peptides during Development of the Fetal Heart and Circulation Endocrinology, June 1, 2003; 144(6): 2191 - 2194. [Abstract] [Full Text] [PDF] |
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T. Horio, T. Tokudome, T. Maki, F. Yoshihara, S.-i. Suga, T. Nishikimi, M. Kojima, Y. Kawano, and K. Kangawa Gene Expression, Secretion, and Autocrine Action of C-Type Natriuretic Peptide in Cultured Adult Rat Cardiac Fibroblasts Endocrinology, June 1, 2003; 144(6): 2279 - 2284. [Abstract] [Full Text] [PDF] |
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M. R. Alexander, J. W. Knowles, T. Nishikimi, and N. Maeda Increased Atherosclerosis and Smooth Muscle Cell Hypertrophy in Natriuretic Peptide Receptor A-/-Apolipoprotein E-/- Mice Arterioscler. Thromb. Vasc. Biol., June 1, 2003; 23(6): 1077 - 1082. [Abstract] [Full Text] [PDF] |
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S. H. Kim, G. Y. Koh, K. W. Cho, W.-Y. Park, and J.-S. Seo Stretch-Activated Atrial Natriuretic Peptide Secretion in Atria with Heat Shock Protein 70 Overexpression Experimental Biology and Medicine, February 1, 2003; 228(2): 200 - 206. [Abstract] [Full Text] [PDF] |
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A. C Rosenkranz, R. L Woods, G. J Dusting, and R. H Ritchie Antihypertrophic actions of the natriuretic peptides in adult rat cardiomyocytes: importance of cyclic GMP Cardiovasc Res, February 1, 2003; 57(2): 515 - 522. [Abstract] [Full Text] [PDF] |
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I. Boutin-Ganache, S. Picard, and C. F. Deschepper Distinct gene-sex interactions regulate adult rat cardiomyocyte width and length independently Physiol Genomics, December 26, 2002; 12(1): 61 - 67. [Abstract] [Full Text] [PDF] |
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A. C. Rosenkranz, S. G. Hood, R. L. Woods, G. J. Dusting, and R. H. Ritchie Acute Antihypertrophic Actions of Bradykinin in the Rat Heart: Importance of Cyclic GMP Hypertension, October 1, 2002; 40(4): 498 - 503. [Abstract] [Full Text] [PDF] |
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Y. Li, I. Kishimoto, Y. Saito, M. Harada, K. Kuwahara, T. Izumi, N. Takahashi, R. Kawakami, K. Tanimoto, Y. Nakagawa, et al. Guanylyl Cyclase-A Inhibits Angiotensin II Type 1A Receptor-Mediated Cardiac Remodeling, an Endogenous Protective Mechanism in the Heart Circulation, September 24, 2002; 106(13): 1722 - 1728. [Abstract] [Full Text] [PDF] |
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T. Tokudome, T. Horio, F. Yoshihara, S.-i. Suga, Y. Kawano, M. Kohno, and K. Kangawa Adrenomedullin Inhibits Doxorubicin-Induced Cultured Rat Cardiac Myocyte Apoptosis via a cAMP-Dependent Mechanism Endocrinology, September 1, 2002; 143(9): 3515 - 3521. [Abstract] [Full Text] [PDF] |
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L. J. Ellmers, J. W. Knowles, H.-S. Kim, O. Smithies, N. Maeda, and V. A. Cameron Ventricular expression of natriuretic peptides in Npr1-/- mice with cardiac hypertrophy and fibrosis Am J Physiol Heart Circ Physiol, August 1, 2002; 283(2): H707 - H714. [Abstract] [Full Text] [PDF] |
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S. Adler and H. Huang Impaired Regulation of Renal Oxygen Consumption in Spontaneously Hypertensive Rats J. Am. Soc. Nephrol., July 1, 2002; 13(7): 1788 - 1794. [Abstract] [Full Text] [PDF] |
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S. H. Kim, J. H. Han, C. Cao, S. Z. Kim, and K. W. Cho Postnatal changes in inhibitory effect of C-type natriuretic peptide on secretion of ANP Am J Physiol Regulatory Integrative Comp Physiol, June 1, 2002; 282(6): R1672 - R1679. [Abstract] [Full Text] [PDF] |
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L King and M R Wilkins Natriuretic peptide receptors and the heart Heart, April 1, 2002; 87(4): 314 - 315. [Full Text] [PDF] |
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F. A Babiker, L. J De Windt, M. van Eickels, C. Grohe, R. Meyer, and P. A Doevendans Estrogenic hormone action in the heart: regulatory network and function Cardiovasc Res, February 15, 2002; 53(3): 709 - 719. [Abstract] [Full Text] [PDF] |
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C. F. Deschepper, I. Boutin-Ganache, A. Zahabi, and Z. Jiang In Search of Cardiovascular Candidate Genes: Interactions Between Phenotypes and Genotypes Hypertension, February 1, 2002; 39(2): 332 - 336. [Abstract] [Full Text] [PDF] |
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J. R. Klinger, R. R. Warburton, L. Pietras, P. Oliver, J. Fox, O. Smithies, and N. S. Hill Targeted disruption of the gene for natriuretic peptide receptor-A worsens hypoxia-induced cardiac hypertrophy Am J Physiol Heart Circ Physiol, January 1, 2002; 282(1): H58 - H65. [Abstract] [Full Text] [PDF] |
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T. Omura, M. Yoshiyama, K. Yoshida, Y. Nakamura, S. Kim, H. Iwao, K. Takeuchi, and J. Yoshikawa Dominant Negative Mutant of c-Jun Inhibits Cardiomyocyte Hypertrophy Induced by Endothelin 1 and Phenylephrine Hypertension, January 1, 2002; 39(1): 81 - 86. [Abstract] [Full Text] [PDF] |
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S. H. Kim, J. H. Han, S. H. Lim, S. J. Lee, S. Z. Kim, and K. W. Cho Attenuation of inhibitory effect of CNP on the secretion of ANP from hypertrophied atria Am J Physiol Regulatory Integrative Comp Physiol, November 1, 2001; 281(5): R1456 - R1463. [Abstract] [Full Text] [PDF] |
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G. Foldes, M. Suo, I. Szokodi, Z. Lako-Futo, R. deChatel, O. Vuolteenaho, P. Huttunen, H. Ruskoaho, and M. Toth Factors Derived from Adrenals Are Required for Activation of Cardiac Gene Expression in Angiotensin II-Induced Hypertension Endocrinology, October 1, 2001; 142(10): 4256 - 4263. [Abstract] [Full Text] [PDF] |
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G. Schwartzbauer and J. Robbins Matters of Sex: Sex Matters Circulation, September 18, 2001; 104(12): 1333 - 1335. [Full Text] [PDF] |
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M. van Eickels, C. Grohe, J. P.M. Cleutjens, B. J. Janssen, H. J.J. Wellens, and P. A. Doevendans 17{beta}-Estradiol Attenuates the Development of Pressure-Overload Hypertrophy Circulation, September 18, 2001; 104(12): 1419 - 1423. [Abstract] [Full Text] [PDF] |
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M. Jankowski, G. Rachelska, W. Donghao, S. M. McCann, and J. Gutkowska Estrogen receptors activate atrial natriuretic peptide in the rat heart PNAS, September 13, 2001; (2001) 201394198. [Abstract] [Full Text] [PDF] |
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M. Hayashi, T. Tsutamoto, A. Wada, K. Maeda, N. Mabuchi, T. Tsutsui, H. Horie, M. Ohnishi, and M. Kinoshita Intravenous atrial natriuretic peptide prevents left ventricular remodeling in patients with first anterior acute myocardial infarction J. Am. Coll. Cardiol., June 1, 2001; 37(7): 1820 - 1826. [Abstract] [Full Text] [PDF] |
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I. Kishimoto, K. Rossi, and D. L. Garbers A genetic model provides evidence that the receptor for atrial natriuretic peptide (guanylyl cyclase-A) inhibits cardiac ventricular myocyte hypertrophy PNAS, February 8, 2001; (2001) 51625598. [Abstract] [Full Text] |
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C. F. Deschepper, S. Masciotra, A. Zahabi, I. Boutin-Ganache, S. Picard, and T. L. Reudelhuber Functional Alterations of the Nppa Promoter Are Linked to Cardiac Ventricular Hypertrophy in WKY/WKHA Rat Crosses Circ. Res., February 2, 2001; 88(2): 223 - 228. [Abstract] [Full Text] [PDF] |
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T. Nishikimi, A. Miyata, T. Horio, F. Yoshihara, N. Nagaya, S. Takishita, C. Yutani, H. Matsuo, H. Matsuoka, and K. Kangawa Urocortin, a member of the corticotropin-releasing factor family, in normal and diseased heart Am J Physiol Heart Circ Physiol, December 1, 2000; 279(6): H3031 - H3039. [Abstract] [Full Text] [PDF] |
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I. Kishimoto, K. Rossi, and D. L. Garbers A genetic model provides evidence that the receptor for atrial natriuretic peptide (guanylyl cyclase-A) inhibits cardiac ventricular myocyte hypertrophy PNAS, February 27, 2001; 98(5): 2703 - 2706. [Abstract] [Full Text] [PDF] |
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M. Jankowski, G. Rachelska, W. Donghao, S. M. McCann, and J. Gutkowska Estrogen receptors activate atrial natriuretic peptide in the rat heart PNAS, September 25, 2001; 98(20): 11765 - 11770. [Abstract] [Full Text] [PDF] |
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