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Biologically active peptides from Bothrops jararacussu venom.
L A Ferreira1, O B Henriques, I Lebrun
1Instituto Butantan, São Paulo, Brazil.
Agents and Actions. Supplements
|January 1, 1992
Summary
Researchers discovered a peptide in Brazilian pit viper venom that significantly enhances bradykinin (BK) effects. This potent compound also inhibits angiotensin I-converting enzyme, showing promise for cardiovascular research.
Area of Science:
- Pharmacology
- Biochemistry
- Herpetology
Background:
- Snake venom contains bioactive compounds.
- Bradykinin (BK) is a peptide with significant physiological effects.
- Angiotensin I-converting enzyme (ACE) plays a key role in blood pressure regulation.
Purpose of the Study:
- To isolate and characterize peptides from Bothrops jararacussu venom.
- To investigate the potentiating effects of these peptides on bradykinin (BK).
- To assess the potential of these peptides as inhibitors of angiotensin I-converting enzyme (ACE).
Main Methods:
- Chromatographic separation (Sephadex G-25, G-10) to isolate active peptides.
- High-Performance Liquid Chromatography (HPLC) for component analysis.
- Bioassays using isolated guinea-pig ileum and rat arterial blood pressure to measure BK potentiation and ACE inhibition.
Main Results:
- An active peptide was isolated from Bothrops jararacussu venom.
- The peptide significantly potentiated the smooth muscle contracting activity of bradykinin (BK).
- The isolated peptide demonstrated 2-3 times greater activity than Captopril in potentiating BK effects and inhibiting ACE.
Conclusions:
- Bothrops jararacussu venom contains a potent peptide that enhances bradykinin activity.
- This peptide is a strong inhibitor of angiotensin I-converting enzyme (ACE).
- The findings suggest potential therapeutic applications for snake venom-derived peptides in cardiovascular medicine.