Dihydroquercetin and Fucoidin Inhibit the Increase of Angiotensin-Converting Enzyme Activity in the Rat Aorta after Irradiation

The time course of angiotensin-converting enzyme activity in the rat aorta after fractionated exposure to ionizing radiation and the effects of dihydroquercetin and fucoidin on this parameter were studied. Male Wistar rats were exposed to single or repeated (fractionated) X-ray radiation in a dose o...

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Bibliographic Details
Published in:Bulletin of experimental biology and medicine 2018-07, Vol.165 (3), p.360-363
Main Authors: Korystova, A. F., Kublik, L. N., Kim, Yu. A., Levitman, M. Kh, Shaposhnikova, V. V., Korystov, Yu. N.
Format: Article
Language:English
Subjects:
Angiotensin
Angiotensin converting enzyme inhibitors
Angiotensins
Aorta
Biomedical and Life Sciences
Biomedicine
Cell Biology
Coronary vessels
Diuretics
Endothelium
Enzymatic activity
Enzymes
Flavonoids
Hydrolysis
Internal Medicine
Ionizing radiation
Laboratory Medicine
Pathology
Peptidyl-dipeptidase A
Rodents
X-rays
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Summary:The time course of angiotensin-converting enzyme activity in the rat aorta after fractionated exposure to ionizing radiation and the effects of dihydroquercetin and fucoidin on this parameter were studied. Male Wistar rats were exposed to single or repeated (fractionated) X-ray radiation in a dose of 2.5 Gy at 200 kV. Activity of angiotensin-converting enzyme in aorta segments was evaluated 2 h after the last exposure by hydrolysis of hippuryl-histidineleucin substrate. Enzyme activity in the rat aorta was higher than normally after all the studied doses of fractionated exposure (2.5 Gy per fraction) with the maximum effect after the total dose of 7.5 Gy (3 fractions). Fucoidin, a blocker of endothelium receptors realizing the leukocyte adhesion to the endothelium, and flavonoid dihydroquercetin inhibiting expression of adhesion molecules in the endothelium abolished the increase in activity of angiotensinconverting enzyme in the rat aorta after single exposure; moreover, dihydroquercetin reduced significantly the effect of fractionated exposure. These data indicate that leukocyte adhesion to the endothelium is an important factor contributing to the increase of angiotensin-converting enzyme activity in the aorta.
ISSN:0007-4888
1573-8221
DOI:10.1007/s10517-018-4170-2