Increased nitration of sarcoplasmic reticulum Ca2+-ATPase in human heart failure

Andrew J. Lokuta, Nathan Maertz, Sivan Vadakkadath Meethal, Katherine T. Potter, Timothy J. Kamp, Héctor H. Valdivia, Robert A. Haworth

Research output: Contribution to journalArticle

112 Citations (Scopus)

Abstract

Background - Reduced sarcoplasmic reticulum (SR) Ca2+-ATPase (SERCA2a isoform) activity is a major determinant of reduced contractility in heart failure. Ca2+-ATPase inactivation can occur through SERCA2a nitration. We therefore investigated the role of SERCA2a nitration in heart failure. Methods and Results - We measured SERCA2a levels and nitrotyrosine levels in tissue from normal and failing human hearts using Western blots. We found that nitrotyrosine levels in idiopathic dilated cardiomyopathic (DCM) hearts were almost double those of control hearts in age-matched groups. Nitrotyrosine was dominantly present in a single protein with the molecular weight of SERCA2a, and immunoprecipitation confirmed that the protein recognized by the nitrotyrosine antibody was SERCA2a. There was a positive correlation between the time to half relaxation and the nitrotyrosine/SERCA2a content (P

Original languageEnglish (US)
Pages (from-to)988-995
Number of pages8
JournalCirculation
Volume111
Issue number8
DOIs
StatePublished - Mar 1 2005
Externally publishedYes

Fingerprint

Calcium-Transporting ATPases
Sarcoplasmic Reticulum
Heart Failure
Immunoprecipitation
Protein Isoforms
Proteins
Research Design
Age Groups
Molecular Weight
Western Blotting
3-nitrotyrosine
Antibodies

Keywords

  • Calcium
  • Heart failure
  • Nitric oxide
  • Sarcoplasmic reticulum

ASJC Scopus subject areas

  • Physiology
  • Cardiology and Cardiovascular Medicine

Cite this

Lokuta, A. J., Maertz, N., Meethal, S. V., Potter, K. T., Kamp, T. J., Valdivia, H. H., & Haworth, R. A. (2005). Increased nitration of sarcoplasmic reticulum Ca2+-ATPase in human heart failure. Circulation, 111(8), 988-995. https://doi.org/10.1161/01.CIR.0000156461.81529.D7

Increased nitration of sarcoplasmic reticulum Ca2+-ATPase in human heart failure. / Lokuta, Andrew J.; Maertz, Nathan; Meethal, Sivan Vadakkadath; Potter, Katherine T.; Kamp, Timothy J.; Valdivia, Héctor H.; Haworth, Robert A.

In: Circulation, Vol. 111, No. 8, 01.03.2005, p. 988-995.

Research output: Contribution to journalArticle

Lokuta, AJ, Maertz, N, Meethal, SV, Potter, KT, Kamp, TJ, Valdivia, HH & Haworth, RA 2005, 'Increased nitration of sarcoplasmic reticulum Ca2+-ATPase in human heart failure', Circulation, vol. 111, no. 8, pp. 988-995. https://doi.org/10.1161/01.CIR.0000156461.81529.D7
Lokuta, Andrew J. ; Maertz, Nathan ; Meethal, Sivan Vadakkadath ; Potter, Katherine T. ; Kamp, Timothy J. ; Valdivia, Héctor H. ; Haworth, Robert A. / Increased nitration of sarcoplasmic reticulum Ca2+-ATPase in human heart failure. In: Circulation. 2005 ; Vol. 111, No. 8. pp. 988-995.
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