Abstract：
: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.
journal_name
Bull Exp Biol Medjournal_title
Bulletin of experimental biology and medicineauthors
Korystova AF,Kublik LN,Kim YA,Levitman MK,Shaposhnikova VV,Korystov YNdoi
10.1007/s10517-018-4170-2subject
Has Abstractpub_date
2018-07-01 00:00:00pages
360-363issue
3eissn
0007-4888issn
1573-8221pii
10.1007/s10517-018-4170-2journal_volume
165pub_type
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