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Carbon nanotube doped pericardial matrix derived electroconductive biohybrid hydrogel for cardiac tissue engineering

机译:碳纳米管掺杂心包基质衍生的心脏组织工程导电性生物羊水凝胶

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摘要

Cardiovascular diseases represent a major socio-economic burden. In recent years, considerable effort has been invested in optimizing cell delivery strategies to advance cell transplantation therapies to restore heart function for example after an infarct. A particular issue is that the implantation of cells using a non-electroconductive matrix potentially causes arrhythmia. Here, we demonstrate that our hydrazide-functionalized nanotubes-pericardial matrix-derived electroconductive biohybrid hydrogel provides a suitable environment for maturation of human-induced pluripotent stem cell (hiPSC)-derived cardiomyocytes. hiPSC-derived cardiomyocytes exhibited an improved contraction amplitude (>500%) on conductive hydrogels compared to cells cultured on Matrigel (R). This was accompanied by increased cellular alignment, enhanced connexin 43 expression, and improved sarcomere organization suggesting maturation of the hiPSC-derived cardiomyocytes. Sarcomeric length of these cells increased from 1.3 to 1.7 mu m. Moreover, 3D cell-laden engineered tissues exhibited enhanced calcium handling as well as positive response to external electrical and pharmaceutical stimulation. Collectively, our data indicate that our biohybrid hydrogels consisting of solubilized nanostructured pericardial matrix and electroconductive positively charged hydrazide-conjugated carbon nanotubes provide a promising material for stem cell-based cardiac tissue engineering.
机译:心血管疾病代表了主要的社会经济负担。近年来,已经投入了相当大的努力,优化细胞输送策略,以推进细胞移植疗法以恢复心脏功能,例如在梗塞之后。特定问题是使用非导电基质植入细胞可能导致心律失常。在此,我们证明了我们的酰肼官能化的纳米管 - 心包基质衍生的导电性生物凝胶提供适当的人诱导的多能干细胞(HIPSC)的心肌细胞的成熟环境。与在Matrigel(R)上培养的细胞相比,HIPSC衍生的心肌细胞在导电水凝胶上显示出改善的收缩幅度(> 500%)。这伴随着增加的细胞比赛,增强的connexin 43表达,并改善了伴侣组织的改进了髋关节衍生的心肌细胞的成熟。这些细胞的SARCOMERIC长度从1.3增加到1.7μm。此外,3D细胞载体工程组织表现出增强的钙处理以及对外部电气和药物刺激的阳性反应。集体,我们的数据表明,我们的生物喂水水凝胶由溶解的纳米结构包装基质和导电性带正电荷的酰亚氮共轭碳纳米管提供了一种有希望的用于干细胞的心脏组织工程材料。

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  • 来源
    《Biomaterials Science》 |2019年第9期|共12页
  • 作者单位

    Friedrich Alexander Univ Erlangen Nurnberg FAU Inst Pathol Dept Nephropathol Expt Renal &

    Cardiovasc Res D-91054 Erlangen Germany;

    Univ Tehran Fac New Sci &

    Technol Biomed Engn Dept Biomat Grp Bioceram Lab Tehran 1439957131 Iran;

    Univ Tehran Fac New Sci &

    Technol Biomed Engn Dept Biomat Grp Bioceram Lab Tehran 1439957131 Iran;

    Univ Tehran Fac Vet Med Dept Surg &

    Radiol Tehran 1417466191 Iran;

    Tampere Univ Technol Bioengn &

    Nanomed Lab Fac Biomed Sci &

    Engn Tampere 33720 Finland;

    Uppsala Univ Dept Chem Angstrom Lab SE-75121 Uppsala Sweden;

    Friedrich Alexander Univ Erlangen Nurnberg FAU Inst Pathol Dept Nephropathol Expt Renal &

    Cardiovasc Res D-91054 Erlangen Germany;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 分子生物学;
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