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Influence of mercaptopropionic-acid-capped CdTe quantum dots on the human chorionic gonadotropin structure and activity alterations

机译:巯基酸酸升压CDTE量子点对人绒毛膜促性腺激素结构及活性改变的影响

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摘要

As an emerging nanomaterial, quantum dots (QDs) have received enormous attention for their excellent photophysical properties. However, their biotoxicity restricts the application and development of quantum dots. To evaluate the toxicity of quantum dots at the molecular level, the effects of quantum dots on human chorionic gonadotropin (hCG) were explored using spectroscopic techniques and isothermal titration calorimetry (ITC). It was demonstrated that MPA (mercaptopropionic acid)-CdTe QDs interacted with hCG through hydrogen bonds and van der Waals interactions, causing a decrement in the alpha-helix of the protein and an unfolding process. The conformational changes of hCG lead to the damage of hydrogen bonding networks and the exposure of tyrosine residues to the surface of hCG, which might be the reason why the hCG fluorescence intensity increased and the bioactivity decreased with the increasing concentration of MPA-CdTe QDs.
机译:作为新出现的纳米材料,量子点(QDS)对其优异的光药性具有巨大的关注。 然而,它们的生物毒性限制了量子点的应用和发展。 为了评估量子点在分子水平下的毒性,使用光谱技术和等温滴定热法(ITC)探讨了量子点对人绒毛膜促性腺激素(HCG)的影响。 据证明,MPA(巯基丙酸)-CDTE QD通过氢键和范德华相互作用与HCG相互作用,导致蛋白质的α-螺旋和展开过程中的减少。 HCG的构象变化导致氢键网络的损伤以及酪氨酸残基暴露于HCG表面,这可能是HCG荧光强度增加的原因,并且生物活性随着MPa-CdTe QD的浓度的增加而降低。

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  • 来源
    《RSC Advances》 |2016年第84期|共7页
  • 作者

    Hao Minglu; Liu Rutao;

  • 作者单位

    Shandong Univ China Amer CRC Environm &

    Hlth Shandong Key Lab Water Pollut Control &

    Resource Sch Environm Sci &

    Engn 27 Shanda South Rd Jinan 250100 Shandong Peoples R China;

    Shandong Univ China Amer CRC Environm &

    Hlth Shandong Key Lab Water Pollut Control &

    Resource Sch Environm Sci &

    Engn 27 Shanda South Rd Jinan 250100 Shandong Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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