Related Experiment Videos
Beta-endorphin in silent duodenal ulcer
G F Tonnarini1, G Delle Fave, M Chianelli
1Institute of Clinical Medicine II, University of Rome La Sapienza, Italy.
European Journal of Gastroenterology & Hepatology
|April 1, 1995
Summary
Patients with silent duodenal ulcers have higher plasma beta-endorphin levels than those with painful ulcers. This suggests the opioid system, specifically beta-endorphin, influences pain perception in duodenal ulcer disease.
Area of Science:
- Gastroenterology
- Neuroscience
- Pain Research
Background:
- Duodenal ulcer disease is common, with some patients experiencing silent ulcers despite active disease.
- The role of endogenous opioids, like beta-endorphin, in pain perception and ulceration is not fully understood.
Purpose of the Study:
- To compare plasma beta-endorphin levels in duodenal ulcer patients with painful versus silent active ulcers.
- To investigate the potential peripheral role of beta-endorphin in gastric juice.
Main Methods:
- Studied 45 patients with a history of duodenal ulceration, divided into symptomatic (painful) and asymptomatic (silent) groups.
- Measured plasma beta-endorphin levels before and after omeprazole treatment.
- Analyzed beta-endorphin concentration in gastric juice following pentagastric stimulation in a subset of patients.
Main Results:
- No significant difference in basal beta-endorphin levels between symptomatic and asymptomatic groups before or after treatment.
- Plasma beta-endorphin levels were significantly higher in asymptomatic patients compared to symptomatic patients.
- Highest beta-endorphin levels were observed in patients reporting no pain.
Conclusions:
- Elevated beta-endorphin may contribute to the silent presentation of some duodenal ulcers by modulating pain perception.
- Findings suggest the involvement of the opioid system in the pathophysiology of duodenal ulcer pain.
- Gastric juice beta-endorphin levels indicate a potential peripheral action of this opioid.