Cited by 618Receptor Mechanisms and SignalingCardiac Fibrosis and RemodelingCardiomyopathy and Myosin Studies

Norepinephrine-stimulated hypertrophy of cultured rat myocardial cells is an alpha-1 adrenergic response

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Simpson, P·1983·Journal of Clinical Investigation

Abstract

We have shown recently that norepinephrine stimulates muscle cell hypertrophy in primary cultures from the neonatal rat ventricle and that this stimulation is not blocked by the beta adrenergic antagonist propranolol. The present study was done to define the adrenergic specificity of the myocyte hypertrophic response to norepinephrine. 90% pure, single-cell cultures of nongrowing myocytes were maintained in serum-free medium 199 with transferin and insulin. Myocyte size was quantitated 48 h after addition of adrenergic agents, by measuring cell volume, cell surface area, and cell protein. L-norepinephrine increased myocyte size to a maximum 150% of control; half-maximum effect was obtained at a concentration of 0.2 microM. This increase in cell size was inhibited by the nonselective alpha adrenergic antagonist phentolamine and by the alpha 1 adrenergic antagonists prazosin and terazosin; it was not inhibited by propranolol or by the alpha 2 adrenergic antagonist yohimbine. The beta adrenergic agonist isoproterenol did not increase cell size. Thus, norepinephrine-stimulated hypertrophy of cultured rat myocardial cells is an alpha 1 adrenergic response.

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  1. Kyncl, J. J., E. N. Bush, and S. A. Buckner. 1982. Alpha adrenergic blocking properties of terazosin. Fed. Proc. 41:1648.

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Authors
Simpson, P.
Affiliations
San Francisco VA Medical Center (US)
Corresponding author
Simpson, P
Venue
Journal of Clinical Investigation
Published
1983-08-01
Volume
72
Issue
2
Pages
732-738
ISSN
0021-9738 (ISSN-L)
OpenAlex
W2110889457
Cited by
618
References
20
Citations by year
2026: 4 · 2025: 3 · 2024: 3 · 2023: 2 · 2022: 6 · 2021: 5 · 2020: 5 · 2019: 7 · 2018: 3 · 2017: 4 · 2016: 5 · 2015: 5 · 2014: 3 · 2013: 10 · 2012: 6
FWCI
3.65
Type
journal article
Language
en
Open access
Locations
  • Journal of Clinical Investigation (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • University of California, San Francisco
  • National Heart, Lung, and Blood Institute (R01HL031113)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Receptor Mechanisms and Signaling
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiac Fibrosis and Remodeling
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiomyopathy and Myosin Studies
Keywords
norepinephrine, cardiac hypertrophy, alpha1-adrenoceptors, alpha-blockers, phentolamine, prazosin, terazosin, yohimbine, isoproterenol, propranolol
MeSH terms
Adrenergic alpha-Antagonists, Animals, Cardiomegaly, Isoproterenol, Myocardium, Norepinephrine, Phentolamine, Prazosin, Propranolol, Receptors, Adrenergic, Receptors, Adrenergic, alpha, Rats

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