Related Experiment Videos
Captopril and 6-mercaptopurine: whose SH possesses higher antioxidant ability?
1Department of Organic Chemistry, College of Chemistry, Jilin University, No. 2519 Jiefang Road, Changchun 130021, China.
European Journal of Medicinal Chemistry
|August 21, 2009
Summary
Captopril, 6-mercaptopurine, and 6-mercaptopurine riboside exhibit antioxidant properties. Captopril effectively donates hydrogen atoms, while 6-mercaptopurine riboside shows strong radical reduction capabilities, protecting cells and DNA from oxidative damage.
Area of Science:
- Biochemistry
- Pharmacology
- Oxidative Stress Research
Background:
- Oxidative stress is implicated in various diseases.
- Antioxidants play a crucial role in mitigating oxidative damage.
- Understanding the antioxidant potential of existing drugs can reveal new therapeutic applications.
Purpose of the Study:
- To evaluate and compare the antioxidant capacities of captopril (CAP), 6-mercaptopurine (6-MP), and 9-(beta-D-ribofuranosyl)-6-mercaptopurine (6-MPR).
- To investigate their radical scavenging and protective effects against induced oxidation in biological systems.
Main Methods:
- Interaction with stable radicals: DPPH, galvinoxyl, and ABTS(+)(*).
- Assessment of protection against 2,2'-azobis(2-amidinopropane hydrochloride) (AAPH)-induced oxidation of DNA and erythrocytes.
- Evaluation of protection against hemin-induced erythrocyte hemolysis.
Main Results:
- Captopril demonstrated the highest hydrogen atom donation to DPPH and galvinoxyl radicals.
- 6-mercaptopurine riboside exhibited the strongest reduction of ABTS(+) radical.
- All three compounds provided protection against AAPH-induced oxidation; 6-MPR showed the most potent protection for DNA and erythrocytes.
- Captopril also protected erythrocytes from hemin-induced hemolysis.
Conclusions:
- Captopril, 6-mercaptopurine, and 6-mercaptopurine riboside possess significant antioxidant activities.
- Their mechanisms of action involve radical scavenging and protection of biological macromolecules and cells.
- These findings suggest potential therapeutic benefits beyond their primary indications.
Related Concept Videos
01:30Antihypertensive Drugs: Angiotensin-Converting Enzyme Inhibitors
Angiotensin-converting enzyme (ACE), a vital component of the renin-angiotensin-aldosterone system, is abundant in lung endothelial cells. ACE converts the inactive decapeptide, angiotensin I, into the active octapeptide, angiotensin II. This potent vasoconstrictor narrows blood vessels, increasing resistance to blood flow and elevating blood pressure. Angiotensin II also stimulates aldosterone production, encouraging kidney cells to reabsorb more sodium and water from urine, thereby increasing...
01:21Antiprotozoal Agents
Leishmaniasis is a widespread parasitic disease caused by several Leishmania species. It affects millions of people each year and remains a major public health problem in endemic regions. First-line treatment relies on pentavalent antimonials, including meglumine antimoniate and sodium stibogluconate. Even so, how these drugs work has not been fully clear, especially their interaction with parasite-specific biochemical pathways. One key target is trypanothione reductase (TR), an enzyme that...