Effects of Bilberry on Deoxyribonucleic Acid Damage and Oxidant-Antioxidant Balance in the Lens, Induced by Ultraviolet Radiation
- Author:
Eman Mohamed Aly
;
Mervat Ahmed Ali
- Publication Type:Journal Article
- Keywords:
ultraviolet;
rat;
lens;
comet assay;
bilberry;
malondialdehyde
- MeSH:
Vaccinium myrtillus;
DNA;
Comet Assay;
Malondialdehyde
- From:Malaysian Journal of Medical Sciences
2014;21(1):11-18
- CountryMalaysia
- Language:English
-
Abstract:
Background: This study investigated the possible protective effects of bilberry extract after exposing rat eyes to ultraviolet-B (UV-B) radiation.
Methods: Four groups of rats were included in this study, each consisting of 10 Wistar rats. The first group acted as the control, and the second group was exposed to UV-B, 5 KJ/m2 (λm = 300 nm), for 15 minutes. The third group was orally administered bilberry extract (160 mg twice per day) for two weeks before exposure to the UV-B, while the fourth group was administered the same dose of bilberry extract for two weeks before euthanisation. A comet assay was used to examine DNA damage, while the malondialdehyde (MDA) level and superoxide dismutase (SOD), glutathione peroxidase (GSH-Px) and catalase (CAT), activities were measured in the lens.
Results: After exposing the rats to UV-B radiation, the mean percentage tail DNA and tail moment were significantly increased (P < 0.001) when compared to the control group. In the same context, the lens tissue MDA levels and CAT activity were also significantly increased (P < 0.001). The supplementation of the bilberry extract was found to improve the comet assay parameters and enzymatic activity of the rat lens tissue.
Conclusion: The administration of bilberry led to a decrease in the oxidative stress in the lens tissues and DNA damage induced by UV-B radiation in the lenses of Wistar rats.
- Full text:W020151029346686776275.pdf
