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Spatial distribution of the transverse stiffness of relaxed and activated rat soleus muscle fibers

  • Complex Systems Biophysics
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Abstract

The transverse stiffness of glycerinated and demembranated fibers from the soleus muscle of Wistar rats in different functional states was measured by atomic force microscopy. It was demonstrated that the transverse stiffness of relaxed fibers near the Z disk is approximately twofold higher as compared with the M-line region. However, the stiffness of glycerinated fibers in the Z-disk and M-line regions is considerably lower than that of demembranated fibers. The values of mechanical parameters of activated fibers are significantly higher as compared with the relaxed fibers. However, the stiffness of activated glycerinated fibers near the Z disk approximately doubled as compared with the relaxed state, whereas the stiffness of the Z-disk region in demembranated fibers increased more than fourfold. The stiffness of both glycerinated and demembranized fibers near the M-line increased approximately threefold.

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Authors and Affiliations

  1. Institute of Biomedical Problems, Russian Academy of Sciences, Moscow, 123007, Russia

    I. V. Ogneva & B. S. Shenkman

  2. Konstantinov Institute of Nuclear Physics, Russian Academy of Sciences, Orlova roshcha, Gatchina, Leningrad oblast, Russia

    D. V. Lebedev & V. V. Isaev-Ivanov

Authors
  1. I. V. Ogneva
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  2. D. V. Lebedev
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  3. V. V. Isaev-Ivanov
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  4. B. S. Shenkman
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Correspondence to I. V. Ogneva.

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Original Russian Text © I.V. Ogneva, D.V. Lebedev, V.V. Isaev-Ivanov, B.S. Shenkman, 2008, published in Biofizika, 2008, Vol. 53, No. 6, pp. 1073–1077.

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Ogneva, I.V., Lebedev, D.V., Isaev-Ivanov, V.V. et al. Spatial distribution of the transverse stiffness of relaxed and activated rat soleus muscle fibers. BIOPHYSICS 53, 604–607 (2008). https://doi.org/10.1134/S0006350908060250

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  • DOI: https://doi.org/10.1134/S0006350908060250

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