GLP-1 (glucagon-like peptide-1) is a naturally occurring peptide hormone. It is released by intestinal cells in response to food intake. It is involved in the regulation of blood glucose, appetite and gastrointestinal function.
Researchers are using this natural hormone to develop longer lasting GLP-1-based peptides. This work has contributed to research into metabolic pathways and GLP-1 receptor biology.
How Does GLP-1 Work?
GLP-1 acts on three important target organs which are pancreas, brain, and gastrointestinal tract. It helps regulate blood glucose, appetite, and gastrointestinal function by acting on specific GLP-1 receptors in these tissues.
| Body parts | Mechanism of GLP-1 |
|---|---|
| Pancreas | Increases insulin and reduces glucagon |
| Brain | Increases feeling of fullness |
| Stomach | Slows gastric emptying |
What Biological Effects Of GLP-1 Have Been Studied?
Research has evaluated several biological effects associated with GLP-1 receptor activity, Such as
- Effects on blood glucose regulation
- Reduce appetite and food intake
- Weight reduction
- Slow gastric emptying
- Effects on renal and cardiovascular system
GLP-1 has increased interest of researchers in cardiovascular and neurological research also.
Why Are Scientists So Interested In GLP-1 Peptides?
Natural GLP-1 does not stay active for a long time. It is rapidly broken down in the body.
Researchers therefore developed modified peptides that can remain active for much longer.
Research is expanding from single-target GLP-1 compounds towards multi-target peptides.
- GLP-1 agonists: Target the GLP-1 receptor.
- Dual agonists: Such as tirzepatide, target GLP-1 and GIP pathways.
- Triple agonists: Such as retatrutide, are being investigated for activity at GLP-1, GIP, and glucagon receptors.
Research is investigating the effects of modulating several metabolic pathways simultaneously.
Where Is GLP-1 Research Going?
Current research is exploring several areas:
- More effective dual and triple-receptor peptides
- Oral alternatives to injectable compounds
- Brain and neurodegenerative disorders
- Metabolic liver disease
- Cardiovascular and kidney health
Some of these areas are already supported by clinical evidence, while others are still under investigation.
The Bottom Line
GLP-1 is much more than a hormone involved in blood sugar control. Because of wide-ranging effects, GLP-1 peptides are an active area of modern metabolic research.
As research continues, the focus is shifting from single-target therapies toward multi-target peptides that can influence multiple metabolic pathways at once.
Disclaimer:
This information is provided only for educational and scientific purposes. Research peptides are intended only for laboratory research and are not approved for human use unless authorized by the relevant regulatory authorities.
References
- Holst, J. J. (2024). GLP-1 physiology in obesity and development of incretin-based drugs for chronic weight management. Nature Metabolism, 6(10), 1866–1885. https://doi.org/10.1038/s42255-024-01113-9
- McLean, B. A., Wong, C. K., Campbell, J. E., Hodson, D. J., Trapp, S., & Drucker, D. J. (2021). Revisiting the complexity of GLP-1 action from sites of synthesis to receptor activation. Endocrine Reviews, 42(2), 101–132. https://doi.org/10.1210/endrev/bnaa032
- Liu, Q. K. (2024). Mechanisms of action and therapeutic applications of GLP-1 and dual GIP/GLP-1 receptor agonists. Frontiers in Endocrinology, 15, 1431292. https://doi.org/10.3389/fendo.2024.1431292
