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Bulletin of Experimental Biology and Medicine

, Volume 165, Issue 3, pp 360–363 | Cite as

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

  • A. F. Korystova
  • L. N. Kublik
  • Yu. A. Kim
  • M. Kh. Levitman
  • V. V. Shaposhnikova
  • Yu. N. Korystov
Article

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.

Key Words

aorta angiotensin-converting enzyme ionizing radiation 

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • A. F. Korystova
    • 1
  • L. N. Kublik
    • 1
  • Yu. A. Kim
    • 2
  • M. Kh. Levitman
    • 1
  • V. V. Shaposhnikova
    • 1
  • Yu. N. Korystov
    • 1
  1. 1.Institute of Theoretical and Experimental BiophysicsRussian Academy of SciencesPushchinoRussia
  2. 2.Institute of Cell BiophysicsRussian Academy of SciencesPushchinoRussia

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