首页> 外文期刊>Journal of biomedical materials research. Part B, Applied biomaterials. >Effects of different doses of 2,3-dimercaptosuccinic acid-modified Fe2O3 nanoparticles on intercalated discs in engineered cardiac tissues
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Effects of different doses of 2,3-dimercaptosuccinic acid-modified Fe2O3 nanoparticles on intercalated discs in engineered cardiac tissues

机译:不同剂量的2,3-二巯基琥珀酸改性Fe2O3纳米粒子对工程心脏组织中插孔的影响

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Although iron oxide nanoparticles (IRONs) were applied in clinical magnetic resonance imaging in vivo and magnetic tissue engineering in vitro widely, the underlying effects of IRONs on the development of cardiomyocytes especially the intercellular junctions, intercalated discs (IDs), remain an unknown issue. Given the critical role of three-dimensional (3D) engineered cardiac tissues (ECTs) in evaluation of nanoparticles toxicology, it remained necessary to understand the effects of IRONs on IDs assembly of cardiomyocytes in 3D environment. In this study, we first reconstituted collagen/Matrigel based ECTs in vitro and prepared IRONs with 2,3-dimercaptosuccinic acid (DMSA-IRONs). We found that the internalization of DMSA-IRONs by cardiac cells in dose-dependent manner was not associated with the cell distribution in 3D environment by determination of Prussian blue staining and transmission electronic microscopy. Significantly, through determination of western blotting and immunofluorescence of connexin 43, N-cadherin, desmoplakin, and plakoglobin, DMSA-IRONs enhanced the assembly of gap junctions, decreased mechanical junctions (adherens junctions and desmosomes) of cardiac cells but not in dose-dependent manner in ECTs at seventh day. In addition, DMSA-IRONs increased the vesicles secretion of cardiac cells in ECTs apparently compared to control groups. Overall, we conclude that the internalization of DMSA-IRONs by cardiac cells in dose-dependent manner enhanced the assembly of electrochemical junctions and decreased the mechanical related microstructures. (c) 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 106B: 121-130, 2018.
机译:虽然氧化铁纳米颗粒(铁)在体内临床磁共振成像中施加在体内和磁性组织工程中的临床磁共振成像广泛上,但是铁杆对心肌细胞的发展的潜在影响尤其是细胞间隙,插入盘(IDS)仍然是一个未知问题。鉴于三维(3D)工程的心脏组织(ECTS)在评估纳米颗粒毒理学中的关键作用,它仍然需要了解铁杆对3D环境中心肌细胞IDS组装的影响。在该研究中,我们首先在体外重构基于胶原/基质胶,并用2,3-二巯基琥珀酸(DMSA-IRONS)制备的铁杆。我们发现,通过测定普鲁士蓝染色和传输电子显微镜,心脏细胞以剂量依赖性方式对DMSA-IRON的内化与3D环境中的细胞分布无关。值得注意的是,通过测定Connexin 43的蛋白质印迹和免疫荧光,DMSA-IRONS增强了间隙结的组装,减少了心脏细胞的机械连接(粘附结和DESMOSES),但不依赖于剂量在第七天的态度。此外,DMSA-IRONs显然与对照组相比,增加了心脏细胞的囊泡。总体而言,我们得出结论,心脏细胞以剂量相关方式的心脏细胞内化增强了电化学连接的组装并降低了机械相关的微观结构。 (c)2016 Wiley期刊,Inc.J生物保解率B:Appl Biomater,106B:121-130,2018。

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