Differences in Sarcoplasmic Reticulum Ca(superscript 2+) Leak Characteristics between Systolic and Diastolic Heart Failure Rabbit Models

Lei Wang; Shi-Jie Zhang; Cao Zou; Zhi-Hua Liu

doi:10.4077/CJP.2011.AMM070

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P133 - 142

医药卫生 > 基础医学

DOI： 10.4077/CJP

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Differences in Sarcoplasmic Reticulum Ca(superscript 2+) Leak Characteristics between Systolic and Diastolic Heart Failure Rabbit Models

Lei Wang ； Shi-Jie Zhang ； Cao Zou ； Zhi-Hua Liu

The Chinese Journal of Physiology ； 54 卷 2 期 (2011 / 04 / 01) ， P133 - 142

英文 DOI： 10.4077/CJP.2011.AMM070

systolic heart failure ； diastolic heart failure ； Ca(superscript 2+) leak ； ryanodine receptor ； phosphorylation

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摘要 │ 参考文献 (47) │ 被引用文献 (1) │ 国际计量

并列摘要〈TOP〉

Diastolic heart failure (DHF) and systolic heart failure (SHF) are two clinical subsets of chronic heart failure (CHF). Sarcoplasmic reticulum (SR) Ca(superscript 2+) leak has been measured in SHF and might contribute to contractile dysfunction and arrhythmogenesis. However, no study has investigated a similar phenomenon in DHF. Thus, we established DHF and SHF rabbit models and compared the differences in Ca(superscript 2+) leak between these models. New Zealand white rabbits were randomly divided into three groups (n=8 in each group): sham operation (SO) group, DHF group and SHF group. Cardiac functions were determined by echocardiography and hemodynamic assays. The SR Ca(superscript 2+) leak was measured with a calcium-imaging device and the expression and activities of related proteins were evaluated with Western blots and autophosphorylation. In the DHF group, there was significantly increased ventricular wall thickness and stiffness, reduced diastolic function, and total amount of FK-506 binding protein 12.6 (FKBP12.6), increased expression and activity of protein kinase A (PKA) and phosphorylation site (P2809) in the ryanodine receptor (RyR2), but no prominent Ca(superscript 2+) leak. In the SHF group, there was significantly increased ventricular cavity size, reduced systolic function, increased SR Ca(superscript 2+) leak, reduced total amount of FKBP12.6 and FKBP12.6-RyR2 association, increased expression and activity of PKA and Ca(superscript 2+)/calmodulin-dependent protein kinase II (CaMKII) and their RyR2 phosphorylation sites with unchanged P2030. Our results suggest that a prominent SR Ca(superscript 2+) leak was not observed in the DHF model, which may provide a new idea for the reasons in preserved systolic function, and CaMKII possibly plays a more important role in SR Ca(superscript 2+) leak.

参考文献 ( 47 ) 〈TOP〉

Ai, X.,Curran, J. W.,Shannon, T. R.,Bers, D. M.,Pogwizd, S. M.(2005).Ca2+/calmodulin-dependent protein kinase modulates cardiac ryanodine receptor phosphorylation and sarcoplasmic reticulum Ca2+ leak in heart failure.Circ. Res.,97,1314-1322.
Aurigemma, G. P.,Zile, M. R.,Gasch, W. H.(2006).Contractile behavior of the left ventricle in diastolic heart failure.Circulation,113,296-304.
Baicu, C. F.,Zile, M. R.,Aurigemma, G. P.,Gaasch, W. H.(2005).Left ventricular systolic performance, function and contractility in patients with diastolic heart failure.Circulation,111,2306-2312.
Bhatia, R. S.,Tu, J. V.,Lee, D. S.,Austin, P. C.,Fang, J.,Haouzi, A.,Gong, Y.,Liu, P. P.(2006).Outcome of heart failure with preserved ejection fraction in a population-based study.N. Engl. J. Med.,355,260-269.
Curran, J.,Hinton, M. J.,Rios, E.,Bers, D. M.,Shannon, T. R.(2007).Beta-adrenergic enhancement of sarcoplasmic reticulum calcium leak in cardiac myocytes is mediated by calcium/calmodulin-dependent protein kinase.Circ. Res.,100,391-398.

被引用文献 ( 1 ) 〈TOP〉

Wu, Chieh-Hsi,Shen, Chia-Yao,Pai, Peiying,Huang, Chih-Yang,Hsieh, You-Liang,Ho, Tsung-Jung,Fan, Ming-Jen,Day, Cecilia Hsuan,Chung, Li-Chin,Cheng, Yi-Chang(2014).Effects of Garlic Oil on Interleukin-6 Mediated Cardiac Hypertrophy in Hypercholesterol-Fed Hamsters.中国生理学杂志,57(6),320-328.

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