SERCA2a superinhibition by human phospholamban triggers electrical and structural remodeling in mouse hearts

Hong Sheng Wang, Demetrios A. Arvanitis, Min Dong, Paul J. Niklewski, Wen Zhao, Chi Keung Lam, Evangelia G. Kranias, Despina Sanoudou

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Phospholamban (PLN), the reversible inhibitor of the sarco(endo)plasmic reticulum Ca2+-ATPase (SERCA2a), is a key regulator of myocyte Ca2+ cycling with a significant role in heart failure. We previously showed that the single amino acid difference between human and mouse PLN results in increased inhibition of Ca2+ cycling and cardiac remodeling and attenuated stress responses in transgenic mice expressing the human PLN (hPLN) in the null background. Here we dissect the molecular and electrophysiological processes triggered by the superinhibitory hPLN in the mouse. Using a multidisciplinary approach, we performed global gene expression analysis, electrophysiology, and mathematical simulations on hPLN mice. We identified significant changes in a series of Na+ and K+ homeostasis genes/proteins (including Kcnd2, Scn9a, Slc8a1) and ionic conductance (including L-type Ca2+ current, Na+ Ca2+ exchanger, transient outward K+ current). Simulation analysis suggests that this electrical remodeling has a critical role in rescuing cardiac function by improving sarcoplasmic reticulum Ca2+ load and overall Ca2+ dynamics. Furthermore, multiple structural and transcription factor gene expression changes indicate an ongoing structural remodeling process, favoring hypertrophy and myogenesis while suppressing apoptosis and progression to heart failure. Our findings expand current understanding of the hPLN function and provide additional insights into the downstream implications of SERCA2a superinhibition in the mammalian heart.

Original languageEnglish
Pages (from-to)357-364
Number of pages8
JournalPhysiological Genomics
Volume43
Issue number7
DOIs
Publication statusPublished - 13 May 2011
Externally publishedYes

Fingerprint

Atrial Remodeling
Reticulum
Calcium-Transporting ATPases
Electrophysiological Phenomena
Heart Failure
Gene Expression
Muscle Development
Electrophysiology
Sarcoplasmic Reticulum
Muscle Cells
Hypertrophy
Transgenic Mice
Homeostasis
Transcription Factors
phospholamban
Apoptosis
Amino Acids
Proteins

Keywords

  • Ca cycling
  • Electrophysiology
  • Genomics
  • Hypertrophy
  • Microarrays

ASJC Scopus subject areas

  • Physiology
  • Genetics

Cite this

Wang, H. S., Arvanitis, D. A., Dong, M., Niklewski, P. J., Zhao, W., Lam, C. K., ... Sanoudou, D. (2011). SERCA2a superinhibition by human phospholamban triggers electrical and structural remodeling in mouse hearts. Physiological Genomics, 43(7), 357-364. https://doi.org/10.1152/physiolgenomics.00032.2010

SERCA2a superinhibition by human phospholamban triggers electrical and structural remodeling in mouse hearts. / Wang, Hong Sheng; Arvanitis, Demetrios A.; Dong, Min; Niklewski, Paul J.; Zhao, Wen; Lam, Chi Keung; Kranias, Evangelia G.; Sanoudou, Despina.

In: Physiological Genomics, Vol. 43, No. 7, 13.05.2011, p. 357-364.

Research output: Contribution to journalArticle

Wang, HS, Arvanitis, DA, Dong, M, Niklewski, PJ, Zhao, W, Lam, CK, Kranias, EG & Sanoudou, D 2011, 'SERCA2a superinhibition by human phospholamban triggers electrical and structural remodeling in mouse hearts', Physiological Genomics, vol. 43, no. 7, pp. 357-364. https://doi.org/10.1152/physiolgenomics.00032.2010
Wang, Hong Sheng ; Arvanitis, Demetrios A. ; Dong, Min ; Niklewski, Paul J. ; Zhao, Wen ; Lam, Chi Keung ; Kranias, Evangelia G. ; Sanoudou, Despina. / SERCA2a superinhibition by human phospholamban triggers electrical and structural remodeling in mouse hearts. In: Physiological Genomics. 2011 ; Vol. 43, No. 7. pp. 357-364.
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