Abstract
Whether intra-myocardial delivery of hydrogel can prevent post-infarct heart failure (HF) in a long follow-up period, especially after it is degraded, remains unclear. In this study, Dex-PCL-HEMA/PNIPAAm (DPHP) hydrogel was delivered into peri-infarct myocardium of rat when coronary artery was ligated, while PBS was employed as control. Twelve weeks later, compared with control, left ventricle remodeling was attenuated and cardiac function was preserved; serum brain natriuretic peptide, cardiac aldosterone, and pulmonary congestion were suppressed in hydrogel group. Pro-fibrogenic mRNA increased in infarct area while decreased in remote zone, as well as hypertrophic mRNA. These data proves DPHP hydrogel suppresses ventricular remodeling and HF by promoting fibrotic healing in infarct area and inhibiting reactive fibrosis and hypertrophy in remote zone. Timely intra-myocardial hydrogel implantation is an effective strategy to inhibit post-infarct cardiac remodeling and have a long-term beneficial effect even after it has been biodegraded.
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Abbreviations
- β-MHC:
-
Myosin heavy chain beta
- ANP:
-
Atrial natriuretic peptide
- BNP:
-
Brain natriuretic peptide
- CSA:
-
Cross-sectional area
- CVF:
-
Collagen volume fraction
- DPHP:
-
Dex-PCL-HEMA/ PNIPAAm
- ECM:
-
Extracellular matrix
- LAD:
-
Left coronary artery
- LV:
-
Left ventricle
- LVEDD:
-
LV end-diastolic diameter
- LVESD:
-
LV end-systolic diameter
- LVFS:
-
Left ventricular fractional shortening
- HF:
-
Heart failure
- MI:
-
Myocardial infarction
- NIZ:
-
Non-infarct zone
- PEG:
-
Polyethylene glycol
- TGF-β1:
-
Transforming growth factor beta1
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Acknowledgments
We gratefully acknowledge Dr. Hong-gang Chu for technical support with echocardiography.
Funding
This study was supported by grants from the National Key Basic Research Program of China (2011CB606202), the National Nature Science Foundation of China (81170307), and the Fundamental Research Funds for the Central Universities (2042014kf0158).
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The study protocols were approved by the Institutional Animal Care Committee from Wuhan University, People’s Republic of China. NIH guidelines (NIH publication no. 85-23, revised 1996) were followed during the investigation for experimental animal use.
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Wen, Y., Li, Xy., Li, Zy. et al. Intra-myocardial Delivery of a Novel Thermosensitive Hydrogel Inhibits Post-infarct Heart Failure After Degradation in Rat. J. of Cardiovasc. Trans. Res. 13, 677–685 (2020). https://doi.org/10.1007/s12265-019-09941-x
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DOI: https://doi.org/10.1007/s12265-019-09941-x