Effects of Antioxidants on the Gamma-Radiation Damage of the Cultured Vascular Smooth Mucle Cells of Rat Aorta
The Korean Journal of Physiology and Pharmacology
;
: 189-195, 2007.
Article
Dans Anglais
| WPRIM
| ID: wpr-728208
ABSTRACT
To study the protective effects of antioxidants on the radiation damages of the cells, vascular smooth muscle cells (VSMC) from thoracic aorta of Sprague-Dawley rats were cultured and irradiated with gamma-ray. Cell viability was measured by direct cell counting and MTT assay, and flow cytometry was performed to measure fractional distributions of the cells. Gamma-ray irradiation inhibited cell proliferations accompanied with decreased G1 phase and increased S- and G2/M phases, and the maximum effects were observed at 1500 or 2000 cGy. Submaximal concentrations of antioxidants, such as allopurinol, vitamin C, N-acetylcycteine (NAC), lipoic acid, dihydrolipoic acid and rebamipide tended to increase the cell viability suppressed by low dose of radiation (500 cGy), and enalapril and vitamin E increased it significantly. Allopurinol, vitamin E, NAC, lipoic acid, captopril and enalapril significantly increased G1 phase. Allopurinol and vitamin E tended to increase c-Myc expression, detected by Western blot, that was reduced by the radiation, and enalapril increased it significantly. The cell viability and c-Myc expression were highly correlated (r=0.97) with each other. These results suggest that antioxidants, especially enalapril and vitamin E, recover the viability of VSMC from gamma-radiation injury, through a mechanism which includes increase of c-Myc protein expression.
Texte intégral:
Disponible
Indice:
WPRIM (Pacifique occidental)
Sujet Principal:
Aorte
/
Aorte thoracique
/
Acide ascorbique
/
Vitamine E
/
Vitamines
/
Captopril
/
Énalapril
/
Numération cellulaire
/
Cycle cellulaire
/
Survie cellulaire
Limites du sujet:
Animaux
langue:
Anglais
Texte intégral:
The Korean Journal of Physiology and Pharmacology
Année:
2007
Type:
Article
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