Cited by 81RNA and protein synthesis mechanismsCongenital heart defects researchCardiomyopathy and Myosin Studies

Accelerated ribosome formation and growth in neonatal pig hearts

Camacho, J. A., Peterson, C. J., White, G. J., Morgan, H. E.·1990·American Journal of Physiology-Cell Physiology

Abstract

Rapid growth (5 mg dry heart/h) of the left ventricular free wall (LVFW) in the newborn pig heart accompanied by lack of growth of the right ventricular free wall (RVFW) represents a unique natural model of cardiac enlargement that is free of pathophysiological influences. By 3 days of life, LVFW was 71% larger than at 4 h of age. Rates of protein synthesis were measured during perfusion of isolated pig hearts with bicarbonate buffer containing glucose, lactate, insulin, and plasma concentrations of amino acids of an aortic pressure of 60 mmHg. In hearts from pigs that were 18 h of age, rates of protein synthesis were the same in RVFW and LVFW, but in 2-day-old pigs the rate was 52% greater in LVFW than RVFW. During the first 3 days of life, RNA content (mg/g) increased 3.4-fold faster in LVFW than RVFW. When RNA content was expressed per total heart portion, the increase was 7.9-fold greater. Because approximately 85% of total RNA is rRNA, these values indicated much more rapid formation of ribosomes in the LVFW than RVFW. When ribosome formation was measured in vitro in hearts from 48-h-old pigs, rates of formation were 39% greater in LVFW than RVFW, and at 18 h of age, ribosome formation was 40% faster in LVFW than RVFW. These findings indicated that formation of new ribosome preceded accelerated synthesis of total heart proteins. These findings indicated that rapid growth of LVFW compared with no growth of RVFW was associated with a 67% faster rate of ribosome formation and a 32% greater rate of protein synthesis.

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Registry

Crossref · 10.1152/ajpcell.1990.258.1.c86

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13 of 13 references verified0 citation errors · 0 not checkable

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  • Muscle relaxation and the rapid hyperglycemic effects of the sleep-onset growth hormone pulse account for the remaining fall in glucose uptake during early sleep.

    “Muscle relaxation and the rapid hyperglycemic effects of the sleep-onset GH pulse account for the remaining fall in glucose uptake during early sleep [103].”

    From Sleep and metabolic function (2012) · cites this paper as [103]

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Authors
Camacho, J. A., Peterson, C. J., White, G. J., & Morgan, H. E.
Affiliations
Geisinger Medical Center (US)
Venue
American Journal of Physiology-Cell Physiology
Published
1990-01-01
Volume
258
Issue
1
Pages
C86-C91
ISSN
  • 0363-6143 (ISSN-L)
  • 1522-1563
OpenAlex
W2415167314
Cited by
81
References
13
Citations by year
2026: 1 · 2018: 1 · 2017: 1 · 2016: 1 · 2014: 4 · 2013: 2 · 2012: 1
FWCI
4.28
Type
journal article
Language
en
Open access
closed
Locations
  • American Journal of Physiology-Cell Physiology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (7r01hl035289-03, 5t32hl007223-15)
  • National Heart, Lung, and Blood Institute (HL 07223, HL-35289)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA and protein synthesis mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Congenital heart defects research
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiomyopathy and Myosin Studies
Keywords
ribosome formation, cardiac growth, left ventricular free wall, right ventricular free wall, protein synthesis, RNA content, ribosomal RNA, cardiac hypertrophy, heart development
MeSH terms
Aging, Animals, Animals, Newborn, Cell Fractionation, Centrifugation, Density Gradient, Heart, Heart Ventricles, Myocardium, Phenylalanine, Ribosomes, RNA, Swine, Protein Biosynthesis

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