The effect of injected RGD modified alginate on angiogenesis and left ventricular function in a chronic rat infarct model

Abstract Congestive heart failure (CHF) is a chronic disease with a high mortality rate. Managing CHF patients has been one of the most severe health care problems for years. Scaffold materials have been predominantly investigated in acute myocardial infarction (MI) studies and have shown promising...

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Bibliographic Details
Published in:Biomaterials 2009-02, Vol.30 (5), p.751-756
Main Authors: Yu, Jiashing, Gu, Yiping, Du, Kim T, Mihardja, Shirley, Sievers, Richard E, Lee, Randall J
Format: Article
Language:English
Subjects:
Advanced Basic Science
Alginate
Alginates - pharmacology
Animals
Cell Adhesion - drug effects
Cell Proliferation - drug effects
Cells, Cultured
Dentistry
Disease Models, Animal
Female
Glucuronic Acid - pharmacology
Hexuronic Acids - pharmacology
Humans
Hydrogel
Myocardial infarction
Myocardial Infarction - drug therapy
Oligopeptides - chemistry
Rats
Rats, Sprague-Dawley
RGD peptides
Ventricular Function, Left - drug effects
Ventricular Remodeling - drug effects
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Summary:Abstract Congestive heart failure (CHF) is a chronic disease with a high mortality rate. Managing CHF patients has been one of the most severe health care problems for years. Scaffold materials have been predominantly investigated in acute myocardial infarction (MI) studies and have shown promising improvement in LV function. In this study we examined whether surface modification of a biomaterial can influence the myocardial microenvironment and improve myocardial function in a rodent model of ischemic cardiomyopathy. In vitro cell culture and in vivo rat studies were performed. RGD peptides conjugated to alginate improved human umbilical vein endothelial cell (HUVEC) proliferation and adhesion when compared to a non-modified alginate group. Injection of the alginate hydrogel into the infarct area of rats 5 weeks post-MI demonstrated that both modified and non-modified alginate improve heart function, while LV function in the control group deteriorated. Both the RGD modified alginate and non-modified alginate increased the arteriole density compared to control, with the RGD modified alginate having the greatest angiogenic response. These results suggest that in situ use of modified polymers may influence the tissue microenvironment and serve as a potential therapeutic agent for patients with chronic heart failure.
ISSN:0142-9612
1878-5905
DOI:10.1016/j.biomaterials.2008.09.059