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Age-Dependent Impairment of Heart Muscle Contractility as a Primary Mechanism for Overexpression of Na+/Ca2+ Exchanger in Brain Cortex Tissues

Received: 19 July 2019     Accepted: 15 August 2019     Published: 29 August 2019
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Abstract

The cognitive function of brain and contractility of heart muscle are accompanied with age-dependent dehydration of tissues of these two organs. The aim of the present study is to reveal which of the abovementioned two organs primarily fail as a result of dysfunction of age-sensitive metabolic mechanism. For this purpose, the age-dependent sensitivity of cell hydration in brain cortex and heart muscle tissues are studied through depressing metabolic activity by cooling and its activation by supplying animals with distilled water, by inactivation of Na+/K+ pump and activation of Na+/Ca2+ exchange in the reverse mode. The obtained data bring us to the conclusion that the metabolic regulation of brain cortex and heart muscle tissues has different nature. The age-dependent dysfunction of Na+/K+ pump–induced activation of RNa+/Ca2+ exchange leads to dysfunction of heart muscle contractility because of activation of Ca-calmoduline-NO-cGMP production, which brings to FNa+/Ca2+ exchange induced muscle relaxation and it could serve as a primary mechanism for dysfunction of brain tissues’ metabolic control of cell hydration, which leads to overexpression of Na+/Ca2+ exchanger in the membrane.

Published in European Journal of Biophysics (Volume 7, Issue 2)
DOI 10.11648/j.ejb.20190702.11
Page(s) 27-42
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2019. Published by Science Publishing Group

Keywords

Hydration, Brain Cortex, Heart Muscle, [3H]-Ouabain, Na+/K+ Pump

References
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Cite This Article
  • APA Style

    Lilia Narinyan, Sinerik Ayrapetyan. (2019). Age-Dependent Impairment of Heart Muscle Contractility as a Primary Mechanism for Overexpression of Na+/Ca2+ Exchanger in Brain Cortex Tissues. European Journal of Biophysics, 7(2), 27-42. https://doi.org/10.11648/j.ejb.20190702.11

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    ACS Style

    Lilia Narinyan; Sinerik Ayrapetyan. Age-Dependent Impairment of Heart Muscle Contractility as a Primary Mechanism for Overexpression of Na+/Ca2+ Exchanger in Brain Cortex Tissues. Eur. J. Biophys. 2019, 7(2), 27-42. doi: 10.11648/j.ejb.20190702.11

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    AMA Style

    Lilia Narinyan, Sinerik Ayrapetyan. Age-Dependent Impairment of Heart Muscle Contractility as a Primary Mechanism for Overexpression of Na+/Ca2+ Exchanger in Brain Cortex Tissues. Eur J Biophys. 2019;7(2):27-42. doi: 10.11648/j.ejb.20190702.11

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  • @article{10.11648/j.ejb.20190702.11,
      author = {Lilia Narinyan and Sinerik Ayrapetyan},
      title = {Age-Dependent Impairment of Heart Muscle Contractility as a Primary Mechanism for Overexpression of Na+/Ca2+ Exchanger in Brain Cortex Tissues},
      journal = {European Journal of Biophysics},
      volume = {7},
      number = {2},
      pages = {27-42},
      doi = {10.11648/j.ejb.20190702.11},
      url = {https://doi.org/10.11648/j.ejb.20190702.11},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ejb.20190702.11},
      abstract = {The cognitive function of brain and contractility of heart muscle are accompanied with age-dependent dehydration of tissues of these two organs. The aim of the present study is to reveal which of the abovementioned two organs primarily fail as a result of dysfunction of age-sensitive metabolic mechanism. For this purpose, the age-dependent sensitivity of cell hydration in brain cortex and heart muscle tissues are studied through depressing metabolic activity by cooling and its activation by supplying animals with distilled water, by inactivation of Na+/K+ pump and activation of Na+/Ca2+ exchange in the reverse mode. The obtained data bring us to the conclusion that the metabolic regulation of brain cortex and heart muscle tissues has different nature. The age-dependent dysfunction of Na+/K+ pump–induced activation of RNa+/Ca2+ exchange leads to dysfunction of heart muscle contractility because of activation of Ca-calmoduline-NO-cGMP production, which brings to FNa+/Ca2+ exchange induced muscle relaxation and it could serve as a primary mechanism for dysfunction of brain tissues’ metabolic control of cell hydration, which leads to overexpression of Na+/Ca2+ exchanger in the membrane.},
     year = {2019}
    }
    

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  • TY  - JOUR
    T1  - Age-Dependent Impairment of Heart Muscle Contractility as a Primary Mechanism for Overexpression of Na+/Ca2+ Exchanger in Brain Cortex Tissues
    AU  - Lilia Narinyan
    AU  - Sinerik Ayrapetyan
    Y1  - 2019/08/29
    PY  - 2019
    N1  - https://doi.org/10.11648/j.ejb.20190702.11
    DO  - 10.11648/j.ejb.20190702.11
    T2  - European Journal of Biophysics
    JF  - European Journal of Biophysics
    JO  - European Journal of Biophysics
    SP  - 27
    EP  - 42
    PB  - Science Publishing Group
    SN  - 2329-1737
    UR  - https://doi.org/10.11648/j.ejb.20190702.11
    AB  - The cognitive function of brain and contractility of heart muscle are accompanied with age-dependent dehydration of tissues of these two organs. The aim of the present study is to reveal which of the abovementioned two organs primarily fail as a result of dysfunction of age-sensitive metabolic mechanism. For this purpose, the age-dependent sensitivity of cell hydration in brain cortex and heart muscle tissues are studied through depressing metabolic activity by cooling and its activation by supplying animals with distilled water, by inactivation of Na+/K+ pump and activation of Na+/Ca2+ exchange in the reverse mode. The obtained data bring us to the conclusion that the metabolic regulation of brain cortex and heart muscle tissues has different nature. The age-dependent dysfunction of Na+/K+ pump–induced activation of RNa+/Ca2+ exchange leads to dysfunction of heart muscle contractility because of activation of Ca-calmoduline-NO-cGMP production, which brings to FNa+/Ca2+ exchange induced muscle relaxation and it could serve as a primary mechanism for dysfunction of brain tissues’ metabolic control of cell hydration, which leads to overexpression of Na+/Ca2+ exchanger in the membrane.
    VL  - 7
    IS  - 2
    ER  - 

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Author Information
  • Life Sciences International Postgraduate Educational Center, Unesco Chair in Life Sciences, Yerevan, Armenia

  • Life Sciences International Postgraduate Educational Center, Unesco Chair in Life Sciences, Yerevan, Armenia

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