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Circulation. 1993;88:2849-2861

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Circulation, Vol 88, 2849-2861, Copyright © 1993 by American Heart Association


ARTICLES

Identification of functional angiotensin II receptors on rat cardiac fibroblasts

FJ Villarreal, NN Kim, GD Ungab, MP Printz and WH Dillmann
Department of Medicine, University of California San Diego.

BACKGROUND. Cardiac hypertrophy results in an increased deposition of the extracellular matrix (ECM) proteins fibronectin and collagen. Recent evidence indicates that angiotensin II (Ang II) might have an important role in the development of myocardial fibrosis accompanying cardiac hypertrophy. We sought to determine whether fibroblasts of cardiac origin (isolated from neonatal and adult animals) express receptors for Ang II and to examine the ability of this peptide to regulate fibronectin and collagen gene expression in a cultured adult cardiac fibroblast cell preparation. METHODS AND RESULTS. Binding of 125I-Ang II to both neonatal and adult cardiac fibroblasts in culture was specific, reversible, and saturable, with the receptor evenly distributed over the cell population. Competition binding experiments with receptor-specific antagonists indicate that Ang II receptors found on both fibroblast types were of the AT1 subtype. Analysis of mRNA levels for the AT1 receptor indicates that adult cardiac fibroblasts express higher levels of the message than neonatal fibroblasts or cardiac myocytes. Addition of 10(-9) mol/L Ang II to adult cardiac fibroblasts resulted in an induction of ECM proteins above control levels, as determined through Northern blots and total collagen assays. CONCLUSIONS. Results from this study indicate that neonatal and adult rat cardiac fibroblasts in culture express AT1 receptors for Ang II. Ang II stimulation of AT1 receptors results in an increased gene expression for ECM proteins. These data suggest that Ang II might have important regulatory roles over cardiac fibroblast function under normal and pathological conditions.


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Circulation, March 3, 1998; 97(8): 744 - 751.
[Abstract] [Full Text] [PDF]


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Am. J. Physiol. Heart Circ. Physiol.Home page
A. M. Gallagher, T. D. Bahnson, H. Yu, N. N. Kim, and M. P. Printz
Species variability in angiotensin receptor expression by cultured cardiac fibroblasts and the infarcted heart
Am J Physiol Heart Circ Physiol, March 1, 1998; 274(3): H801 - H809.
[Abstract] [Full Text] [PDF]


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J. Pharmacol. Exp. Ther.Home page
J. Wharton, K. Morgan, R. A. D. Rutherford, J. D. Catravas, A. Chester, B. F. Whitehead, M. R. D. Leval, M. H. Yacoub, and J. M. Polak
Differential Distribution of Angiotensin AT2 Receptors in the Normal and Failing Human Heart
J. Pharmacol. Exp. Ther., January 1, 1998; 284(1): 323 - 336.
[Abstract] [Full Text]


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CirculationHome page
N. Ohkubo, H. Matsubara, Y. Nozawa, Y. Mori, S. Murasawa, K. Kijima, K. Maruyama, H. Masaki, Y. Tsutumi, Y. Shibazaki, et al.
Angiotensin Type 2 Receptors Are Reexpressed by Cardiac Fibroblasts From Failing Myopathic Hamster Hearts and Inhibit Cell Growth and Fibrillar Collagen Metabolism
Circulation, December 2, 1997; 96(11): 3954 - 3962.
[Abstract] [Full Text]


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CirculationHome page
W. W. Brooks, O. H. L. Bing, K. G. Robinson, M. T. Slawsky, D. M. Chaletsky, and C. H. Conrad
Effect of Angiotensin-Converting Enzyme Inhibition on Myocardial Fibrosis and Function in Hypertrophied and Failing Myocardium From the Spontaneously Hypertensive Rat
Circulation, December 2, 1997; 96(11): 4002 - 4010.
[Abstract] [Full Text]


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CirculationHome page
K. T. Weber
Extracellular Matrix Remodeling in Heart Failure : A Role for De Novo Angiotensin II Generation
Circulation, December 2, 1997; 96(11): 4065 - 4082.
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HypertensionHome page
W. W. Brooks, O. H. L. Bing, C. H. Conrad, L. O'Neill, M. T. Crow, E. G. Lakatta, D. E. Dostal, K. M. Baker, and M. O. Boluyt
Captopril Modifies Gene Expression in Hypertrophied and Failing Hearts of Aged Spontaneously Hypertensive Rats
Hypertension, December 1, 1997; 30(6): 1362 - 1368.
[Abstract] [Full Text]


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HypertensionHome page
T. Takizawa, M. Gu, A. V. Chobanian, and P. Brecher
Effect of Nitric Oxide on DNA Replication Induced by Angiotensin II in Rat Cardiac Fibroblasts
Hypertension, November 1, 1997; 30(5): 1035 - 1040.
[Abstract] [Full Text]


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HypertensionHome page
H. Yu, A. M. Gallagher, P. M. Garfin, and M. P. Printz
Prostacyclin Release by Rat Cardiac Fibroblasts : Inhibition of Collagen Expression
Hypertension, November 1, 1997; 30(5): 1047 - 1053.
[Abstract] [Full Text]


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HypertensionHome page
J. Fareh, R. M. Touyz, E. L. Schiffrin, and G. Thibault
Cardiac Type-1 Angiotensin II Receptor Status in Deoxycorticosterone Acetate–Salt Hypertension in Rats
Hypertension, November 1, 1997; 30(5): 1253 - 1259.
[Abstract] [Full Text]


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Cardiovasc ResHome page
C. M. Yang, V. Kandaswamy, D. Young, and S. Sen
Changes in collagen phenotypes during progression and regression of cardiac hypertrophy
Cardiovasc Res, November 1, 1997; 36(2): 236 - 245.
[Abstract] [Full Text] [PDF]


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HypertensionHome page
R. M. Touyz, J. Fareh, G. Thibault, and E. L. Schiffrin
Intracellular Ca2+ Modulation by Angiotensin II and Endothelin-1 in Cardiomyocytes and Fibroblasts From Hypertrophied Hearts of Spontaneously Hypertensive Rats
Hypertension, November 1, 1996; 28(5): 797 - 805.
[Abstract] [Full Text]


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Circ. Res.Home page
K. Kijima, H. Matsubara, S. Murasawa, K. Maruyama, Y. Mori, N. Ohkubo, I. Komuro, Y. Yazaki, T. Iwasaka, and M. Inada
Mechanical Stretch Induces Enhanced Expression of Angiotensin II Receptor Subtypes in Neonatal Rat Cardiac Myocytes
Circ. Res., October 1, 1996; 79(4): 887 - 897.
[Abstract] [Full Text]


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HypertensionHome page
C. G. Brilla, L. Matsubara, and K. T. Weber
Advanced Hypertensive Heart Disease in Spontaneously Hypertensive Rats: Lisinopril-Mediated Regression of Myocardial Fibrosis
Hypertension, August 1, 1996; 28(2): 269 - 275.
[Abstract] [Full Text]


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HypertensionHome page
S. Shanmugam, P. Corvol, and J.-M. Gasc
Angiotensin II Type 2 Receptor mRNA Expression in the Developing Cardiopulmonary System of the Rat
Hypertension, July 1, 1996; 28(1): 91 - 97.
[Abstract] [Full Text]


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HypertensionHome page
N. Iwai, T. Inagami, N. Ohmichi, and M. Kinoshita
Renin Is Expressed in Rat Macrophage/Monocyte Cells
Hypertension, March 1, 1996; 27(3): 399 - 403.
[Abstract] [Full Text]


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Circ. Res.Home page
J. Fareh, R. M. Touyz, E. L. Schiffrin, and G. Thibault
Endothelin-1 and Angiotensin II Receptors in Cells From Rat Hypertrophied Heart : Receptor Regulation and Intracellular Ca2+ Modulation
Circ. Res., February 1, 1996; 78(2): 302 - 311.
[Abstract] [Full Text]


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CirculationHome page
Y. Furukawa, A. Matsumori, T. Hirozane, and S. Sasayama
Angiotensin II Receptor Antagonist TCV-116 Reduces Graft Coronary Artery Disease and Preserves Graft Status in a Murine Model : A Comparative Study With Captopril
Circulation, January 15, 1996; 93(2): 333 - 339.
[Abstract] [Full Text]


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J. Fareh, R. M. Touyz, G. Thibault, and E. L. Schiffrin
Basal and Angiotensin II–Induced Cytosolic Free Calcium in Adult Rat Cardiomyocytes and Fibroblasts After Volume Overload
Hypertension, December 1, 1995; 26(6): 1149 - 1153.
[Abstract] [Full Text]


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CirculationHome page
N. Iwai, H. Shimoike, and M. Kinoshita
Cardiac Renin-Angiotensin System in the Hypertrophied Heart
Circulation, November 1, 1995; 92(9): 2690 - 2696.
[Abstract] [Full Text]


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HypertensionHome page
A. Nicoletti, D. Heudes, N. Hinglais, M.-D. Appay, M. Philippe, C. Sassy-Prigent, J. Bariety, and J.-B. Michel
Left Ventricular Fibrosis in Renovascular Hypertensive Rats : Effect of Losartan and Spironolactone
Hypertension, July 1, 1995; 26(1): 101 - 111.
[Abstract] [Full Text]


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CirculationHome page
J. Diez, C. Laviades, G. Mayor, M. J. Gil, and I. Monreal
Increased Serum Concentrations of Procollagen Peptides in Essential Hypertension : Relation to Cardiac Alterations
Circulation, March 1, 1995; 91(5): 1450 - 1456.
[Abstract] [Full Text]


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CirculationHome page
V. Regitz-Zagrosek, N. Friedel, A. Heymann, P. Bauer, M. Neuß, A. Rolfs, C. Steffen, A. Hildebrandt, R. Hetzer, and E. Fleck
Regulation, Chamber Localization, and Subtype Distribution of Angiotensin II Receptors in Human Hearts
Circulation, March 1, 1995; 91(5): 1461 - 1471.
[Abstract] [Full Text]


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HypertensionHome page
F. J. Villarreal, D. A. MacKenna, J. H. Omens, and W. H. Dillmann
Myocardial Remodeling in Hypertensive Ren-2 Transgenic Rats
Hypertension, January 1, 1995; 25(1): 98 - 104.
[Abstract] [Full Text]


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J. Biol. Chem.Home page
M. Sano, K. Fukuda, H. Kodama, J. Pan, M. Saito, J. Matsuzaki, T. Takahashi, S. Makino, T. Kato, and S. Ogawa
Interleukin-6 Family of Cytokines Mediate Angiotensin II-induced Cardiac Hypertrophy in Rodent Cardiomyocytes
J. Biol. Chem., September 15, 2000; 275(38): 29717 - 29723.
[Abstract] [Full Text] [PDF]