Elastic 3D‐Printed Hybrid Polymeric Scaffold Improves Cardiac Remodeling after Myocardial Infarction. Issue 10 (2nd April 2019)

• Record Type: Journal Article
• Authors: Yang, Yang; Lei, Dong; Huang, Shixing; Yang, Qi; Song, Benyan; Guo, Yifan; Shen, Ao; Yuan, Zhize; Li, Sen; Qing, Feng‐Ling; Ye, Xiaofeng; You, Zhengwei; Zhao, Qiang
• Is Part Of: Advanced healthcare materials. Volume 8:Issue 10(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-04-02
• Subjects: 3D printing -- myocardial infarction -- poly(glycerol sebacate) -- poly(ε‐caprolactone) -- scaffolds; Biomedical materials -- Periodicals; 610.28
• DOI: 10.1002/adhm.201900065
• Languages: English
• ISSNs: 2192-2640

Abstract

Abstract: Myocardial remodeling, including ventricular dilation and wall thinning, is an important pathological process caused by myocardial infarction (MI). To intervene in this pathological process, a new type of cardiac scaffold composed of a thermoset (poly‐[glycerol sebacate], PGS) and a thermoplastic (poly‐[ε‐caprolactone], PCL) is directly printed by employing fused deposition modeling 3D‐printing technology. The PGS‐PCL scaffold possesses stacked construction with regular crisscrossed filaments and interconnected micropores and exhibits superior mechanical properties. In vitro studies demonstrate favorable biodegradability and biocompatibility of the PGS‐PCL scaffold. When implanted onto the infarcted myocardium, this scaffold improves and preserves heart function. Furthermore, the scaffold improves several vital aspects of myocardial remodeling. On the morphological level, the scaffold reduces ventricular wall thinning and attenuated infarct size, and on the cellular level, it enhances vascular density and increases M2 macrophage infiltration, which might further contribute to the mitigated myocardial apoptosis rate. Moreover, the flexible PGS‐PCL scaffold can be tailored to any desired shape, showing promise for annular‐shaped restraint device application and meeting the demands for minimal invasive operation. Overall, this study demonstrates the therapeutic effects and versatile applications of a novel 3D‐printed, biodegradable and biocompatible cardiac scaffold, which represents a promising strategy for improving myocardial remodeling after MI. Abstract : In this study, a novel cardiac scaffold composed of poly‐(glycerol sebacate) (PGS) and poly‐(ε‐caprolactone) (PCL) is fabricated via 3D‐printing technology. The PGS‐PCL scaffold possesses a stacked construction with regular crisscrossed filaments and interconnected micropores and superior mechanical properties. In vivo studies demonstrate that 3D‐printed PGS‐PCL scaffolds can preserve cardiac function, stimulate angiogenesis, and facilitate M2 macrophage infiltration, thus improving myocardial remodeling.