ATPase ACTIVITY OF RABBIT SKELETAL MUSCLES ACTOMYOSIN COMPLEX UNDER ULTRASOUND EFFECT (K.O. Medynska, N.Ye. Nurishchenko, L.I. Pelyukh, O.V. Shelyuk)

title en

Journal archive > 2012 > N 4 July-August

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;

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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. К⁺-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 К⁺-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.

Key words: actomyosin complex, ATPase activity, ultrasound, skeletal muscle.

The original article in Ukrainian is available for download in PDF format.