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arXiv 1609.02656physics.bio-phq-bio.BM
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纳米金刚石表面对药物释放系统的影响

Effect of Nanodiamond surfaces on Drug Delivery Systems

Debsindhu Bhowmik, Gurpreet K. Dhindsa, Utsab R. Shrestha, Eugene Mamontov, Xiang-qiang Chu

摘要:

RNA纳米技术的前景越来越大,因为它有许多潜在的应用,特别是在医学领域。球形纳米金刚石(ND)由于其较低的毒性、理想的机械、光学性质、功能性和可用的表面积而变得流行。另一方面,RNA是稳定的,灵活的,易于结合到ND。在这项工作中,我们研究了高分辨率准弹性中子散射光谱和全原子分子动力学模拟技术在ND表面上的tRNA的动力学,了解如何tRNA运动的影响,ND的存在。均方位移分析表明,在230K附近,tRNA水合态的柔性急剧增加。代表tRNA动力学的中间散射函数(ISF)遵循模式耦合理论(MCT)提出的对数衰减。但最重要的是,发现在220 K至310 K范围内,与独立的相比,ND存在下的tRNA动力学更快。这正如我们已经表明的,是由于RNA分子的溶胀而引入了亲水性ND表面。

英文摘要:

The prospect of RNA nanotechnology is increasing because of its numerous potential applications especially in medical science. The spherical Nanodiamonds (NDs) are becoming popular because of their lesser toxicity, desirable mechanical, optical properties, functionality and available surface areas. On other hand RNAs are stable, flexible and easy to bind to the NDs. In this work, we have studied the tRNA dynamics on ND surface by high-resolution quasi-elastic neutron scattering spectroscopy and all atom molecular dynamics simulation technique to understand how the tRNA motion is affected by the presence of ND. The flexibly of the tRNA is analyzed by the Mean square displacement analysis that shows tRNA have a sharp increase around 230K in its hydrated form. The intermediate scattering function (ISF) representing the tRNA dynamics follows the logarithmic decay as proposed by the Mode Coupling theory (MCT). But most importantly the tRNA dynamics is found to be faster in presence of ND within 220K to 310K compared to the freestanding ones. This is as we have shown, is because of the swollen RNA molecule due the introduction of hydrophilic ND surface.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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