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Effects of 2,3-dimercaptosuccinic acid modified Fe2O3 nanoparticles on microstructure and biological activity of cardiomyocytes

机译:2,3-二巯基琥珀酸改性Fe2O3纳米粒子对心肌细胞微观结构和生物活性的影响

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摘要

Iron oxide nanoparticles (IRONs) have been widely applied in clinical magnetic resonance imaging and in vitro cardiac tissue engineering. However, the underlying effects of IRONs on the microstructures and biological activity of cardiomyocytes remain a controversial issue. In this study, IRONs were modified with 2,3-dimercaptosuccinic acid (DMSA-IRONs) to increase the hydrophobicity. The effects of DMSA-IRONs on the microstructures and biological activity of cardiomyocytes were systematically investigated. DMSA-IRONs were internalized by cardiomyocytes and mainly distributed in the cytoplasm in a dose-dependent manner. Live/dead assay and MTT assay demonstrated that DMSA-IRONs did not affect the survival of cardiomyocytes. The distribution pattern of F-actin and cell shape were also not changed by the incubation of DMSA-IRONs. Further investigations of the mechanism proved that DMSA-IRONs did not interfere with the formation of cell adherens junctions, gap junctions and intracellular Ca2+ transients of cardiomyocytes. However, the intracellular reactive oxygen species (ROS) concentration in cardiomyocytes with incubation of DMSA-IRONs was significantly reduced due to its peroxidase-like activity. In conclusion, DMSA-IRONs are of good biocompatibility and potentially beneficial for cardiomyocytes by decreasing the intracellular ROS. The study here provides a basic investigation of the DMSA-IRONs application in clinical cell-imaging and cardiac disease therapy.
机译:氧化铁纳米粒子(铁氧化铁)已广泛应用于临床磁共振成像和体外心脏组织工程。然而,熨斗对心肌细胞微观结构和生物活性的潜在影响仍然是一个有争议的问题。在该研究中,用2,3-二巯基琥珀酸(DMSA-IRONS)来修饰铁杆以增加疏水性。 DMSA-IRON对软化细胞组织和生物活性的影响得到了系统地研究。 DMSA-IRONS由心肌细胞内化,主要用剂量依赖性方式分布在细胞质中。 Live / Dead测定和MTT测定表明DMSA-IRON不影响心肌细胞的存活。 DMSA-IRONS的孵育也没有改变F-actin和细胞形状的分布模式。进一步调查该机制证明,DMSA-IRON不会干扰细胞粘附结,间隙交叉点和细胞内CA2 +的心肌细胞的瞬态。然而,由于其过氧化物酶样活性,随着DMSA-IRONS的温育心肌细胞的细胞内反应性氧物质(ROS)浓度显着降低。总之,DMSA-IRON具有良好的生物相容性,并且通过降低细胞内ROS可能对心肌细胞有益。该研究在这里提供了对临床细胞成像和心脏病治疗中DMSA-IRONS应用的基本研究。

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  • 来源
    《RSC Advances》 |2015年第25期|共9页
  • 作者单位

    Harbin Inst Technol Sch Life Sci &

    Technol Harbin 150001 Peoples R China;

    Acad Mil Med Sci Inst Basic Med Sci Dept Adv Interdisciplinary Studies Beijing 100850 Peoples R China;

    Southeast Univ State Key Lab Bioelect Nanjing 210096 Jiangsu Peoples R China;

    Acad Mil Med Sci Inst Basic Med Sci Dept Adv Interdisciplinary Studies Beijing 100850 Peoples R China;

    Acad Mil Med Sci Inst Basic Med Sci Dept Adv Interdisciplinary Studies Beijing 100850 Peoples R China;

    Acad Mil Med Sci Inst Basic Med Sci Dept Adv Interdisciplinary Studies Beijing 100850 Peoples R China;

    Southeast Univ State Key Lab Bioelect Nanjing 210096 Jiangsu Peoples R China;

    Harbin Inst Technol Sch Life Sci &

    Technol Harbin 150001 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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