Ukr.Biochem.J. 2012; Volume 84, Issue 4, Jul-Aug, pp. 54-60

ATPase activity of rabbit skeletal muscles actomyosin complex under ultrasound effect

K. O. Medynska, N. Ye. Nurishchenko, L. I. Pelyukh, O. V. Shelyuk

Taras Shevchenko Kyiv National University;
Educational and Scientific Centre “Institute of Biology”, Ukraine;

Influence of continuous and impulsive ultrasound 0.05; 0.2; 0.4; 0.7 and 1.0 W/cm2 on ATPase activity of rabbit skeletal muscle actomyosin has been investigated in this work. It has been shown that most changes of Mg2+,Ca2+-ATPase activity are observed under 0.2 and 0.4 W/cm2 continuous ultrasound. K+-ATPase activity is inhibited by continuous ultrasound of all intensities studied. Impulsive 2 and 10 ms ultrasound did not change the Mg2+,Ca2+-ATPase activity. While K+-activity is reliably changed only under impulsive 0.7 and 1.0 W/cm2 ultrasound that can be explained by the thermal effect. It has been determined, when studying­ the reconstructed actomyosin with sound troponin complex, that troponin complex is the most ultrasound sensitive constituent of actomyosin.

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