Author： Kovganko N. V. Kashkan Zh. N. Krivenok S. N. Potapovich M. V. Eremin A. N. Metelitsa D. I.
Publisher： Springer Publishing Company
ISSN： 0009-3130
Source： Chemistry of Natural Compounds, Vol.40, Iss.1, 2004-01, pp. : 71-74
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Abstract
The kinetics of catalase decomposition of H2O2 (50 mM) inhibited by the flavonolic glycoside astragalin (1) from the aerial part of Gymnocarpium dryopteris were studied. 1 (0.3-30 M) is a strong inhibitor of the catalase process and was tested as a catalase (CAT) protector from ultrasonic activation at 45°C by treatment of enzyme solutions (1.2 nM) in phosphate buffer (7.5 mM) at pH 5.5 with low-frequency ultrasound (US, 27 kHz) at initial specific power 60 W/cm2. 1 inhibited US-inactivation of CAT according to the rate constants for US-inactivation of CAT in the presence of 1 with and without inhibitor. 1 at concentrations of 1.0 and 20.0 μM decreases US-inactivation up to 22.3 and 19.5% of the initial level. The useful properties and effectiveness of 1 are better than the synthetic inhibitors-antioxidants propylgallate and 4-t-butylpyrocatechin.
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