PMID: 3767Dec 31, 1975

Effects of adrenergic blockade on adipose tissue lipolysis provoked in cats and humans by intravenous perfusion of isoprenaline

La Nouvelle presse médicale
A Ashford


An intravenous infusion of isoprenaline (1 mug/kg/mn during 4 h) elicited a rise in serum free fatty acids (FFA) and glucose in anaesthetised cats. The effect reached a peak in 1 h and was then maintained at a plateau level for the remainder of the infusion. Acebutolol and practolol (0,1-10 mg/kg, p.o.) were more potent in reducing the concentration of free fatty acids (FFA) than in lowering glucose. Propranolol was roughly equipotent on FFA and glucose. In 6 fasted human volunteers, an intravenous infusion of isoprenaline (0,03 mug/kg/mn during 15 min) stimulated a rise in serum FFA. Peak values were attained rapidly and FFA levels began to fall soon after the end of the infusion. Blood glucose concentration was not changed. A placebo, given after the first infusion of isoprenaline, did not significantly affect the response to 2 further infusions at 2 and 4 h later. An oral dose of acebutolol (300 mg) largely suppressed the lipolytic effect of the 2nd and 3rd isoprenaline infusions, the degrees of inhibition being 70 p.cent and 85 p.cent respectively. The same dose of practolol was considerably less effective in inhibiting lipolysis (37 p.cent and 25 p.cent inhibition).

Related Concepts

Fat Pad
Adrenergic beta-Antagonists
Felis catus
Clinical Trials
Nonesterified Fatty Acids
Intravenous Injections

Trending Feeds


Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Neural Activity: Imaging

Imaging of neural activity in vivo has developed rapidly recently with the advancement of fluorescence microscopy, including new applications using miniaturized microscopes (miniscopes). This feed follows the progress in this growing field.

The Tendon Seed Network

Tendons are rich in the extracellular matrix and are abundant throughout the body providing essential roles including structure and mobility. The transcriptome of tendons is being compiled to understand the micro-anatomical functioning of tendons. Discover the latest research pertaining to the Tendon Seed Network here.

Myocardial Stunning

Myocardial stunning is a mechanical dysfunction that persists after reperfusion of previously ischemic tissue in the absence of irreversible damage including myocardial necrosis. Here is the latest research.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.


Incretins are metabolic hormones that stimulate a decrease in glucose levels in the blood and they have been implicated in glycemic regulation in the remission phase of type 1 diabetes. Here is the latest research.

Chromatin Regulation and Circadian Clocks

The circadian clock plays an important role in regulating transcriptional dynamics through changes in chromatin folding and remodelling. Discover the latest research on Chromatin Regulation and Circadian Clocks here.

Long COVID-19

“Long Covid-19” describes illness in patients who are reporting long-lasting effects of the SARS-CoV-19 infection, often long after they have recovered from acute Covid-19. Ongoing health issues often reported include low exercise tolerance and breathing difficulties, chronic tiredness, and mental health problems such as post-traumatic stress disorder and depression. This feed follows the latest research into Long Covid.

Spatio-Temporal Regulation of DNA Repair

DNA repair is a complex process regulated by several different classes of enzymes, including ligases, endonucleases, and polymerases. This feed focuses on the spatial and temporal regulation that accompanies DNA damage signaling and repair enzymes and processes.