Protective Effects of Grape Juice on Vascular Damage Induced by Chlorine Free Radical in Rats
Grapes and their derivatives have antioxidant and cardioprotective properties. Therefore, we hypothesized that grape juice (GJ) could improve vascular oxidative damage caused by chlorine radicals (OCl ), which are excessively produced in vascular tissue during cardiovascular diseases (mainly diabete...
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| Published in: | Preventive nutrition and food science Vol. 26; no. 4; pp. 417 - 424 |
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| Main Authors: | , , , , |
| Format: | Journal Article |
| Language: | English |
| Published: |
Korea (South)
한국식품영양과학회
31-12-2021
The Korean Society of Food Science and Nutrition |
| Subjects: | |
| Online Access: | Get full text |
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| Summary: | Grapes and their derivatives have antioxidant and cardioprotective properties. Therefore, we hypothesized that grape juice (GJ) could improve vascular oxidative damage caused by chlorine radicals (OCl
), which are excessively produced in vascular tissue during cardiovascular diseases (mainly diabetes and hypertension). The antioxidant capacity of GJ was analyzed by an electrochemical method, followed by administration in rats (100 or 300 mg/kg/d, via the oral) for seven days. Then, rats were sacrificed, and their aortas were isolated and subjected to isometric recordings or immuno-histochemical analyses with or without exposure to OCl
(5, 20, or 100 μM, 60 min). Concentration-effect curves for acetylcholine (ACh) and sodium nitroprusside (SNP) were derived to analyze endothelium-dependent or independent vasore-laxation. The GJ presented with high antioxidant capacity, and treatment with GJ did not alter vascular relaxation induced by ACh or SNP. After exposure to OCl
, endothelium-denuded arteries showed preserved relaxation with SNP, whereas endothelium-intact arteries showed reduced relaxation with ACh. OCl
at various concentrations induced significantly decreased relaxation of arteries (80.6±4.2%, 55.4±4.7%, and 28.1±5.9%, respectively) vs. control arteries (96.8±2.4%). However, treatment with GJ prevented loss in relaxation caused by 5 and 20 μM OCl
and improved relaxation after exposure to 100 μM OCl
. Exposure to OCl
induced increased nitrotyrosine immunostaining of endothelial cell layers, which was improved by GJ treatment. Altogether, vascular damage caused by OCl
was prevented by treatment with GJ, and GJ prevented nitrosative stress in these vessels. |
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| Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 Author information: Jose Britto Junior (Student), Diego Antônio Costa Arantes (Instructor), Karla Carnerio Siqueira Leite (Researcher), Eric de Souza Gil (Professor), Matheus Lavorenti Rocha (Professor) |
| ISSN: | 2287-1098 2287-8602 |
| DOI: | 10.3746/pnf.2021.26.4.417 |