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Published on: January 2, 2012
Aged garlic extract scavenges superoxide radicals.
Naoaki Morihara1, Minoru Hayama, Hirotada Fujii
1Healthcare Research Institute, Wakunaga Pharmaceutical Co. Ltd., Akitakata, Hiroshima, Japan. morihara_n@wakunaga.co.jp
Plant Foods for Human Nutrition (Dordrecht, Netherlands)
|February 15, 2011
Summary
Aged garlic extract (AGE) effectively scavenges superoxide radicals, a key factor in aging and disease. This study shows AGE and its components can reduce oxidative stress, potentially preventing related health issues.
Area of Science:
- Biochemistry
- Oxidative Stress Research
- Nutraceutical Science
Background:
- Degenerative diseases like aging and cancer are linked to reactive oxygen species (ROS).
- Superoxide radicals are significant contributors to oxidative damage in biological systems.
- Aged garlic extract (AGE) is a preparation rich in water-soluble sulfur compounds.
Purpose of the Study:
- To evaluate the efficacy of AGE and its components in scavenging superoxide radicals.
- To investigate the potential of AGE in mitigating oxidative stress related to diseases.
Main Methods:
- Utilized the hypoxanthine-xanthine oxidase system and human neutrophils to assess superoxide scavenging.
- Employed electron spin resonance (ESR) spectroscopy to quantify radical scavenging activity.
- Measured superoxide production in activated human neutrophils.
Main Results:
- AGE demonstrated dose-dependent scavenging of superoxide radicals, achieving up to 54% inhibition.
- The half-maximal effective concentration (EC50) for AGE's superoxide scavenging was 0.80 mg/ml.
- Specific AGE components, N-α-(1-deoxy-D-fructos-1-yl)-L-arginine and (1S, 3S)-1-methyl-1,2,3,4-tetrahydro-β-carboline-1,3-dicarboxylic acid, also showed significant scavenging effects.
- AGE (3 mg/ml) markedly reduced superoxide production by activated human neutrophils.
Conclusions:
- Aged garlic extract possesses significant superoxide radical scavenging properties.
- The identified water-soluble components of AGE contribute to its antioxidant capacity.
- AGE may serve as a valuable agent in preventing diseases linked to reactive oxygen species and oxidative stress.
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