Cited by 24Metabolism, Diabetes, and CancerGlycogen Storage Diseases and MyoclonusAdipose Tissue and Metabolism

Adrenaline-mediated glycogen phosphorylase activation is enhanced in rat soleus muscle with increased glycogen content

Jensen, Jørgen, Aslesen, Rune, Jebens, Einar, Skrondal, Anders·1999·Biochimica et Biophysica Acta (BBA) - General Subjects

Abstract

The effect of glycogen content on the activation of glycogen phosphorylase during adrenaline stimulation was investigated in soleus muscles from Wistar rats. Furthermore, adrenergic activation of glycogen phosphorylase in the slow-twitch oxidative soleus muscle was compared to the fast-twitch glycolytic epitrochlearis muscle. The glycogen content was 96.4 +/- 4.4 mmol (kg dw)(-1) in soleus muscles. Three hours of incubation with 10 mU/ml of insulin (and 5.5 mM glucose) increased the glycogen content to 182.2+/-5.9 mmol (kg dw)(-1) which is similar to that of epitrochlearis muscles (175.7+/-6.9 mmol (kg dw)(-1)). Total phosphorylase activity in soleus was independent of glycogen content. Adrenaline (10(-6) M) transformed about 20% and 35% (P < 0.01) of glycogen phosphorylase to the a form in soleus with normal and high glycogen content, respectively. In epitrochlearis, adrenaline stimulation transformed about 80% of glycogen phosphorylase to the a form. Glycogen synthase activation was reduced to low level in soleus muscles with both normal and high glycogen content. In conclusion, adrenaline-mediated glycogen phosphorylase activation is enhanced in rat soleus muscles with increased glycogen content. Glycogen phosphorylase activation during adrenaline stimulation was much higher in epitrochlearis than in soleus muscles with a similar content of glycogen.

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Crossref · 10.1016/s0304-4165(99)00122-1

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Authors
Jensen, J., Aslesen, R., Jebens, E., & Skrondal, A.
Affiliations
  • National Institute of Occupational Health (NO)
  • University of Oslo (NO)
  • Norwegian Institute of Public Health (NO)
Corresponding author
Jensen, Jørgen
Venue
Biochimica et Biophysica Acta (BBA) - General Subjects
Publisher
Elsevier BV
Published
1999-10
Volume
1472
Issue
1-2
Pages
215-222
ISSN
0304-4165 (ISSN-L)
OpenAlex
W1982121582
Cited by
24
References
37
Citations by year
2024: 1 · 2021: 1 · 2020: 1 · 2019: 1 · 2014: 2 · 2013: 1
FWCI
0.34
Type
journal article
Language
en
Open access
closed
Locations
  • Biochimica et Biophysica Acta (BBA) - General Subjects (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
  • Health Sciences › Medicine › Rheumatology › Glycogen Storage Diseases and Myoclonus
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
Keywords
glycogen phosphorylase, epinephrine, soleus muscle, epitrochlearis muscle, glycogen content, slow-twitch muscle, fast-twitch muscle, glycogen synthase, insulin, muscle glycogen metabolism
MeSH terms
Animals, Enzyme Activation, Epinephrine, Glycogen, Phosphorylases, Male, Rats, Wistar, Muscle, Skeletal, Rats, In Vitro Techniques

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