Delivery of alginate-chitosan hydrogel promotes endogenous repair and preserves cardiac function in rats with myocardial infarction.
The regenerative potential of alginate-chitosan composite in bone and cartilage tissue has been well documented, but its potential utility in cardiac tissue engineering has remained unknown. This study sought to determine whether early intramyocardial injection of alginate-chitosan could prevent left ventricular (LV) remodeling after myocardial infarction (MI), leading to a more favorable course of tissue restoration. In a rat model of acute MI, local injection of alginate-chitosan hydrogel into the peri-infarct zone preserved scar thickness, attenuated infarct expansion, and reduced scar fibrosis after 8 weeks, concomitantly with promoting increased angiogenesis and greater recruitment of endogenous repair at the infarct zone. Furthermore, this treatment prevented cell apoptosis, induced cardiomyocyte cell cycle re-entry. The cardiac function of the control-injected animals deteriorated over the 8-week course, while that of the hydrogel-injected animals did not.In addition, the hydrogel did not exacerbate inflammation in the heart. Intramyocardial injection of alginate-chitosan hydrogel represents a useful strategy to treat MI. It demonstrated marked therapeutic efficacies on various tissue levels after extensive MI, as well as potential to induce endogenous cardiomyocyte proliferation and recruit cardiac stem cells.
Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Shanghai Medical College, Fudan University, Shanghai, 200032, China; Department of cardiology, Zhongshan Hospital, Shanghai Medical College, Fudan University, Shanghai, 200032, China.
Biyong
B
Deng
Li
L
Shen
Yizhe
Y
Wu
Yunli
Y
Shen
Xuefeng
X
Ding
Shuyang
S
Lu
Jianguo
J
Jia
Juying
J
Qian
Junbo
J
Ge
D000464:Alginates / Q000737:chemistry*; D000818:Animals; D017209:Apoptosis; D001672:Biocompatible Materials / Q000737:chemistry*; D049109:Cell Proliferation; D048271:Chitosan / Q000737:chemistry*; D004195:Disease Models, Animal; D005355:Fibrosis / Q000503:physiopathology; D020723:Glucuronic Acid / Q000737:chemistry; D006603:Hexuronic Acids / Q000737:chemistry; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate / Q000737:chemistry; D020100:Hydrogels / Q000737:chemistry*; D007249:Inflammation; D008297:Male; D009203:Myocardial Infarction / Q000378:metabolism* / Q000473:pathology; D009206:Myocardium / Q000473:pathology; D051381:Rats; D017207:Rats, Sprague-Dawley; D012038:Regeneration; D044968:Regenerative Medicine; D033081:Shear Strength; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature; D023822:Tissue Engineering / Q000379:methods*; D020257:Ventricular Remodeling
D000464:Alginates; D001672:Biocompatible Materials; D006603:Hexuronic Acids; D020100:Hydrogels; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate; D020723:Glucuronic Acid; D048271:Chitosan
biomaterial; cardiac; infarction; tissue engineering