Cardioprotective effects of phosphocreatine on myocardial cell ultrastructure and calcium-sensing receptor expression in the acute period following high level spinal cord injury

  • Authors:
    • Hui Chen
    • Chao Gong
    • Cheng Ma
    • Xiaoni Zhang
    • Lishuang Xu
    • Caizhu Lin
  • View Affiliations

  • Published online on: May 8, 2014     https://doi.org/10.3892/mmr.2014.2219
  • Pages: 560-566
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Abstract

Phosphocreatine (PCr) mobilizes high-energy phosphates in cardiac muscles, which is potentially useful as a cardioprotective agent in patients with spinal cord injury (SCI). The cardioprotective effects of PCr on myocardial cell ultrastructure and calcium-sensing receptor (CaSR) expression following high-level spinal cord injury (SCI) were investigated. Healthy adult male Sprague-Dawley (SD) rats (n=54) weighing 250-300 g were subjected to C7 SCI injury by Allen's method with or without treatment by abdominal injection of PCr (200 mg/kg) at 6, 12, 24 or 48 h (SCI + treatment and SCI-only groups, respectively; 6 rats/group/time point). Right apical tissues were sampled 2 h following each time interval. Surgeries without SCI were performed in 6 control rats (sham operation group). Cardiac troponin I (cTnI), serum creatine kinase (CK) and creatine kinase (CK-MB) levels were assessed automatically. Myocardial morphology was examined by transmission electron microscopy (TEM). Quantitative real‑time polymerase chain reaction (qRT-PCR) and western blot analysis were used to determine myocardial tissue calcium-sensing receptor (CaSR) mRNA and protein expression, respectively. Normal myocardial ultrastructure was observed in the sham operation group, while SCI-only groups exhibited progressive and extensive damage to myofibrils, sarcomere structure, mitochondrial membranes and vacuole structures, occasionally accompanied by punctured cell membranes, nuclear chromatin condensation and cavitation. SCI + treatment groups, however, exhibited significantly relieved ultrastructural abnormalities and reduced the levels of CaSR, cTnI, CK and CK-MB mRNA and protein expression at all time intervals (P<0.05). In the SCI rat model, PCr exhibited cardioprotection by relieving myocardial ultrastructural abnormalities and preserving the normal metabolic energy balance, including calcium regulation.
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July-2014
Volume 10 Issue 1

Print ISSN: 1791-2997
Online ISSN:1791-3004

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Spandidos Publications style
Chen H, Gong C, Ma C, Zhang X, Xu L and Lin C: Cardioprotective effects of phosphocreatine on myocardial cell ultrastructure and calcium-sensing receptor expression in the acute period following high level spinal cord injury. Mol Med Rep 10: 560-566, 2014
APA
Chen, H., Gong, C., Ma, C., Zhang, X., Xu, L., & Lin, C. (2014). Cardioprotective effects of phosphocreatine on myocardial cell ultrastructure and calcium-sensing receptor expression in the acute period following high level spinal cord injury. Molecular Medicine Reports, 10, 560-566. https://doi.org/10.3892/mmr.2014.2219
MLA
Chen, H., Gong, C., Ma, C., Zhang, X., Xu, L., Lin, C."Cardioprotective effects of phosphocreatine on myocardial cell ultrastructure and calcium-sensing receptor expression in the acute period following high level spinal cord injury". Molecular Medicine Reports 10.1 (2014): 560-566.
Chicago
Chen, H., Gong, C., Ma, C., Zhang, X., Xu, L., Lin, C."Cardioprotective effects of phosphocreatine on myocardial cell ultrastructure and calcium-sensing receptor expression in the acute period following high level spinal cord injury". Molecular Medicine Reports 10, no. 1 (2014): 560-566. https://doi.org/10.3892/mmr.2014.2219