Plasticity of surface structures and 2-adrenergic receptor localization in failing ventricular cardiomyocytes during recovery from heart failure

Alexander R. Lyon, Viacheslav O. Nikolaev, Michele Miragoli, Markus B. Sikkel, Helen Paur, Ludovic Benard, Jean Sebastien Hulot, Erik Kohlbrenner, Roger J. Hajjar, Nicholas S. Peters, Yuri E. Korchev, Ken T. MacLeod, Sian E. Harding, Julia Gorelik

Research output: Contribution to journalArticle

69 Citations (Scopus)

Abstract

Background-Cardiomyocyte surface morphology and T-tubular structure are significantly disrupted in chronic heart failure, with important functional sequelae, including redistribution of sarcolemmal-2-adrenergic receptors (2AR) and localized secondary messenger signaling. Plasticity of these changes in the reverse remodeled failing ventricle is unknown. We used AAV9.SERCA2a gene therapy to rescue failing rat hearts and measured z-groove index, T-tubule density, and compartmentalized-2AR-mediated cAMP signals, using a combined nanoscale scanning ion conductance microscopy-Förster resonance energy transfer technique. Methods and Results-Cardiomyocyte surface morphology, quantified by z-groove index and T-tubule density, was normalized in reverse-remodeled hearts after SERCA2a gene therapy. Recovery of sarcolemmal microstructure correlated with functional 2AR redistribution back into the z-groove and T-tubular network, whereas minimal cAMP responses were initiated after local 2AR stimulation of crest membrane, as observed in failing cardiomyocytes. Improvement of 2AR localization was associated with recovery of AR-stimulated contractile responses in rescued cardiomyocytes. Retubulation was associated with reduced spatial heterogeneity of electrically stimulated calcium transients and recovery of myocardial BIN-1 and TCAP protein expression but not junctophilin-2. Conclusions-In summary, abnormalities of sarcolemmal structure in heart failure show plasticity with reappearance of z-grooves and T-tubules in reverse-remodeled hearts. Recovery of surface topology is necessary for normalization of 2AR location and signaling responses.

Original languageEnglish
Pages (from-to)357-365
Number of pages9
JournalCirculation: Heart Failure
Volume5
Issue number3
DOIs
Publication statusPublished - May 2012

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Cardiac Myocytes
Adrenergic Receptors
Heart Failure
Genetic Therapy
Energy Transfer
Microscopy
Ions
Calcium
Membranes
Proteins

Keywords

  • 2-adrenergic receptors
  • Excitation-contraction coupling
  • Heart failure
  • Remodeling heart failure
  • SERCA2a gene therapy
  • Transverse tubules

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine
  • Medicine(all)

Cite this

Plasticity of surface structures and 2-adrenergic receptor localization in failing ventricular cardiomyocytes during recovery from heart failure. / Lyon, Alexander R.; Nikolaev, Viacheslav O.; Miragoli, Michele; Sikkel, Markus B.; Paur, Helen; Benard, Ludovic; Hulot, Jean Sebastien; Kohlbrenner, Erik; Hajjar, Roger J.; Peters, Nicholas S.; Korchev, Yuri E.; MacLeod, Ken T.; Harding, Sian E.; Gorelik, Julia.

In: Circulation: Heart Failure, Vol. 5, No. 3, 05.2012, p. 357-365.

Research output: Contribution to journalArticle

Lyon, AR, Nikolaev, VO, Miragoli, M, Sikkel, MB, Paur, H, Benard, L, Hulot, JS, Kohlbrenner, E, Hajjar, RJ, Peters, NS, Korchev, YE, MacLeod, KT, Harding, SE & Gorelik, J 2012, 'Plasticity of surface structures and 2-adrenergic receptor localization in failing ventricular cardiomyocytes during recovery from heart failure', Circulation: Heart Failure, vol. 5, no. 3, pp. 357-365. https://doi.org/10.1161/CIRCHEARTFAILURE.111.964692
Lyon, Alexander R. ; Nikolaev, Viacheslav O. ; Miragoli, Michele ; Sikkel, Markus B. ; Paur, Helen ; Benard, Ludovic ; Hulot, Jean Sebastien ; Kohlbrenner, Erik ; Hajjar, Roger J. ; Peters, Nicholas S. ; Korchev, Yuri E. ; MacLeod, Ken T. ; Harding, Sian E. ; Gorelik, Julia. / Plasticity of surface structures and 2-adrenergic receptor localization in failing ventricular cardiomyocytes during recovery from heart failure. In: Circulation: Heart Failure. 2012 ; Vol. 5, No. 3. pp. 357-365.
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abstract = "Background-Cardiomyocyte surface morphology and T-tubular structure are significantly disrupted in chronic heart failure, with important functional sequelae, including redistribution of sarcolemmal-2-adrenergic receptors (2AR) and localized secondary messenger signaling. Plasticity of these changes in the reverse remodeled failing ventricle is unknown. We used AAV9.SERCA2a gene therapy to rescue failing rat hearts and measured z-groove index, T-tubule density, and compartmentalized-2AR-mediated cAMP signals, using a combined nanoscale scanning ion conductance microscopy-F{\"o}rster resonance energy transfer technique. Methods and Results-Cardiomyocyte surface morphology, quantified by z-groove index and T-tubule density, was normalized in reverse-remodeled hearts after SERCA2a gene therapy. Recovery of sarcolemmal microstructure correlated with functional 2AR redistribution back into the z-groove and T-tubular network, whereas minimal cAMP responses were initiated after local 2AR stimulation of crest membrane, as observed in failing cardiomyocytes. Improvement of 2AR localization was associated with recovery of AR-stimulated contractile responses in rescued cardiomyocytes. Retubulation was associated with reduced spatial heterogeneity of electrically stimulated calcium transients and recovery of myocardial BIN-1 and TCAP protein expression but not junctophilin-2. Conclusions-In summary, abnormalities of sarcolemmal structure in heart failure show plasticity with reappearance of z-grooves and T-tubules in reverse-remodeled hearts. Recovery of surface topology is necessary for normalization of 2AR location and signaling responses.",
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AU - Lyon, Alexander R.

AU - Nikolaev, Viacheslav O.

AU - Miragoli, Michele

AU - Sikkel, Markus B.

AU - Paur, Helen

AU - Benard, Ludovic

AU - Hulot, Jean Sebastien

AU - Kohlbrenner, Erik

AU - Hajjar, Roger J.

AU - Peters, Nicholas S.

AU - Korchev, Yuri E.

AU - MacLeod, Ken T.

AU - Harding, Sian E.

AU - Gorelik, Julia

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N2 - Background-Cardiomyocyte surface morphology and T-tubular structure are significantly disrupted in chronic heart failure, with important functional sequelae, including redistribution of sarcolemmal-2-adrenergic receptors (2AR) and localized secondary messenger signaling. Plasticity of these changes in the reverse remodeled failing ventricle is unknown. We used AAV9.SERCA2a gene therapy to rescue failing rat hearts and measured z-groove index, T-tubule density, and compartmentalized-2AR-mediated cAMP signals, using a combined nanoscale scanning ion conductance microscopy-Förster resonance energy transfer technique. Methods and Results-Cardiomyocyte surface morphology, quantified by z-groove index and T-tubule density, was normalized in reverse-remodeled hearts after SERCA2a gene therapy. Recovery of sarcolemmal microstructure correlated with functional 2AR redistribution back into the z-groove and T-tubular network, whereas minimal cAMP responses were initiated after local 2AR stimulation of crest membrane, as observed in failing cardiomyocytes. Improvement of 2AR localization was associated with recovery of AR-stimulated contractile responses in rescued cardiomyocytes. Retubulation was associated with reduced spatial heterogeneity of electrically stimulated calcium transients and recovery of myocardial BIN-1 and TCAP protein expression but not junctophilin-2. Conclusions-In summary, abnormalities of sarcolemmal structure in heart failure show plasticity with reappearance of z-grooves and T-tubules in reverse-remodeled hearts. Recovery of surface topology is necessary for normalization of 2AR location and signaling responses.

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KW - 2-adrenergic receptors

KW - Excitation-contraction coupling

KW - Heart failure

KW - Remodeling heart failure

KW - SERCA2a gene therapy

KW - Transverse tubules

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