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[Calorigenic action of beta-sympathomimetics]
Acta Biologica Et Medica Germanica
|January 1, 1982
Summary
Beta-2 adrenergic agonists like isoprenaline, terbutaline, salbutamol, and clenbuterol demonstrate calorigenic effects in rats. Isoprenaline exhibits the strongest effect, while clenbuterol shows the weakest, with varying durations observed.
Area of Science:
- Pharmacology
- Physiology
Context:
- Beta-2 adrenergic agonists are widely studied for their physiological effects.
- Understanding the calorigenic potential of these compounds is crucial for metabolic research.
Purpose:
- To compare the calorigenic effects and duration of action of several beta-2 adrenergic agonists in vivo.
- To establish a relative efficacy ranking for these compounds based on their thermogenic properties.
Summary:
- Experiments on narcotized rats revealed that isoprenaline, orciprenaline, terbutaline, salbutamol, and clenbuterol all possess calorigenic properties.
- The effectiveness of these agents in increasing calorigenesis decreased in the order: isoprenaline > orciprenaline > salbutamol/terbutaline > clenbuterol.
- While isoprenaline was the most potent, clenbuterol showed significantly weaker effects. The duration of calorigenic action generally increased from isoprenaline to clenbuterol, with a more hesitant onset observed in this sequence.
Impact:
- This study provides a comparative analysis of beta-2 adrenergic agonists' thermogenic capacity.
- Findings contribute to understanding the dose-response and duration relationships of these compounds.
- Offers insights into potential therapeutic applications or side effects related to metabolic rate modulation.