Related Experiment Videos
Insulin-sensitive glucoreceptors in rat preoptic area that regulate FFA mobilization
The American Journal of Physiology
|December 1, 1986
Summary
Neurons in the preoptic area are sensitive to glucose and insulin, regulating free fatty acid (FFA) mobilization. This research highlights the role of these glucoreceptors in controlling FFA levels.
Area of Science:
- Neuroscience
- Endocrinology
- Metabolism
Background:
- A neural pathway involving hypothalamic areas regulates free fatty acid (FFA) mobilization.
- The specific role of the preoptic area in FFA regulation requires further investigation.
Purpose of the Study:
- To investigate the presence and function of insulin-sensitive glucoreceptors in the rat preoptic area.
- To determine the effect of stimulating the preoptic area on plasma FFA levels.
Main Methods:
- Conscious, unrestrained rats were used.
- Topical microinjections of 2-deoxyglucose (2-DG) or insulin were administered to the preoptic area.
- Plasma FFA and glucose levels were measured.
Main Results:
- 2-DG microinjections into the preoptic area increased plasma FFA levels in fed rats.
- Insulin microinjections decreased elevated plasma FFA levels in fasted rats.
- Both 2-DG and insulin caused minor, non-significant increases in plasma glucose.
Conclusions:
- The preoptic area contains insulin-sensitive glucoreceptors involved in FFA mobilization.
- Activation of these receptors may influence sympathetic outflow to adipose tissue, contributing to fasting lipolysis.