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- W2777203222 abstract "Replacing cardiac tissues lost to myocardial infarction remains a therapeutic goal for regenerative therapy in recovering cardiac function. We assessed the feasibility of constructing a macrosized human cardiac tissue construct using pluripotent stem cell-derived cardiomyocytes or control fibroblasts infused fibrin/collagen hydrogel and performed ectopic implantation in peripheral vascular system of a porcine model for 3 weeks. Finally, an optimized vascularized cardiac construct was explanted and grafted onto porcine myocardium for 2 weeks. Myocardial-grafted human cardiac constructs showed a nascent tissue-like organization with aligned cardiomyocytes within the remodelled collagen matrix. Nevertheless, no significant changes in intraconstruct density of cardiomyocytes were observed in the myocardial-grafted constructs (human embryonic stem cell [hESC]-derived cardiomyocyte [n = 4]: 70.5 ± 22.8 troponin I+ cardiomyocytes/high power field [HPF]) as compared to peripherally implanted constructs (hESC-derived cardiomyocyte [n = 4]: 59.0 ± 19.6 troponin I+ cardiomyocytes/HPF; human induced pluripotent stem cell-derived cardiomyocyte [n = 3]: 50.9 ± 8.5 troponin I+ cardiomyocytes/HPF, p = ns). However, the myocardial-grafted constructs showed an increased in neovascularization (194.4 ± 24.7 microvessels/mm2 tissue, p < .05), microvascular maturation (82.8 ± 24.7 mature microvessels/mm2, p < .05), and tissue-like formation whereas the peripherally implanted constructs of hESC-derived cardiomyocyte (168.3 ± 98.2 microvessels/mm2 tissue and 68.1 ± 33.4 mature microvessels/mm2) and human induced pluripotent stem cell-derived cardiomyocyte (86.8 ± 57.4 microvessels/mm2 tissue and 22.0 ± 32.7 mature microvessels/mm2) were not significantly different in vascularized response when compared to the control human fibroblasts (n = 3) constructs (65.6 ± 34.1 microvessels/mm2 tissue and 30.7 ± 20.7 mature microvessels/mm2). We presented results on technical feasibility and challenges of grafting vascularized centimetre-sized human cardiac construct that may spur novel approaches in cardiac tissue replacement strategy." @default.
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- W2777203222 date "2018-01-10" @default.
- W2777203222 modified "2023-10-17" @default.
- W2777203222 title "Construction of a vascularized hydrogel for cardiac tissue formation in a porcine model" @default.
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- W2777203222 doi "https://doi.org/10.1002/term.2634" @default.
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