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Open Access Research

Adiponectin through its biphasic serum level is a useful biomarker during transition from diastolic dysfunction to systolic dysfunction - an experimental study

Mingqiang Fu1, Jingmin Zhou1, Juying Qian1, Xuejuan Jin1, Hongmin Zhu1, Chunlin Zhong1, Michael Fu2, Yunzeng Zou13* and Junbo Ge13*

Author Affiliations

1 Shanghai Institute of Cardiovascular Diseases, Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai, China

2 Department of Medicine, Sahlgrenska University Hospital/Sahlgrenska, Gothenburg, Sweden

3 Institutes of Biomedical Sciences, Fudan University, Shanghai, China

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Lipids in Health and Disease 2012, 11:106  doi:10.1186/1476-511X-11-106

Published: 30 August 2012

Abstract

Background

Adiponectin is reported to relate with cardiovascular diseases, we sought to examine whether adiponectin is associated with disease progression of heart failure from hypertension in rats in comparison with other known biomarkers and echocardiographic parameters. Spontaneously hypertensive rats (SHR, n = 35), aged 1 month, were used and followed up to 18 months. High frequency echocardiography was performed both at baseline and every 3 months thereafter. Moreover, serum levels of N-terminal pro-natriuretic peptide (NT-proBNP) and interleukin-6 (IL-6) as well as serum level and tissue expression of adiponectin were determined at the same time as echocardiography.

Results

The results clearly demonstrated time-dependent progression of hypertension and heart dysfunction as evidenced by gradually increased left ventricular mass index, NT-proBNP, IL-6 as well as gradually decreased cardiac function as assessed by echocardiography. Meanwhile, tissue and serum adiponectin decreased from 3 months and reached plateau until 12 months in parallel with decreasing of cardiac diastolic function. Thereafter, adiponectin levels increased prior to occurrence of systolic dysfunction. Adiponectin concentration is inversely related with NT-proBNP, IL-6 and E/E′ (correlation coefficient (r) = −0.756 for NT-proBNP, p < 0.001, -0.635 for IL-6, p = 0.002, and −0.626 for E/E′, p = 0.002, respectively) while positively correlated with E/A and E′/A′ (r = 0.683 for E/A, p = 0.001, 0.671 for E′/A′, p = 0.001, respectively). No difference for adiponectin distribution among visceral adipose tissues was found.

Conclusion

Adiponectin through its biphasic serum level is a useful biomarker during transition from diastolic dysfunction to systolic dysfunction.

Keywords:
Hypertension; Diastolic function; Systolic function; Adiponectin; Biomarker