Romana Petry, James M de Almeida, Francine Côa, Felipe Crasto de Lima, Diego Stéfani T Martinez, Adalberto Fazzio
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引用次数: 0
Abstract
Graphene oxide (GO) undergoes multiple transformations when introduced to biological and environmental media. GO surface favors the adsorption of biomolecules through different types of interaction mechanisms, modulating the biological effects of the material. In this study, we investigated the interaction of GO with tannic acid (TA) and its consequences for GO toxicity. We focused on understanding how TA interacts with GO, its impact on the material surface chemistry, colloidal stability, as well as, toxicity and biodistribution using the Caenorhabditis elegans model. Employing computational modeling, including reactive classical molecular dynamics and ab initio calculations, we reveal that TA preferentially binds to the most reactive sites on GO surfaces via the oxygen-containing groups or the carbon matrix; van der Waals interaction forces dominate the binding energy. TA exhibits a dose-dependent mitigating effect on the toxicity of GO, which can be attributed not only to the surface interactions between the molecule and the material but also to the inherent biological properties of TA in C. elegans. Our findings contribute to a deeper understanding of GO's environmental behavior and toxicity and highlight the potential of tannic acid for the synthesis and surface functionalization of graphene-based nanomaterials, offering insights into safer nanotechnology development.
氧化石墨烯(GO)进入生物和环境介质后会发生多重变化。通过不同类型的相互作用机制,GO 表面有利于吸附生物分子,从而调节材料的生物效应。在本研究中,我们研究了 GO 与单宁酸(TA)的相互作用及其对 GO 毒性的影响。我们利用秀丽隐杆线虫模型,重点了解单宁酸如何与 GO 相互作用,其对材料表面化学、胶体稳定性以及毒性和生物分布的影响。通过计算建模(包括反应经典分子动力学和 ab initio 计算),我们发现 TA 会通过含氧基团或碳基质优先结合到 GO 表面活性最强的位点;范德华相互作用力主导了结合能。TA对GO的毒性具有剂量依赖性的缓解作用,这不仅归因于分子与材料之间的表面相互作用,也归因于TA在秀丽隐杆线虫体内固有的生物特性。我们的发现有助于加深对 GO 的环境行为和毒性的理解,并突出了单宁酸在石墨烯基纳米材料的合成和表面功能化方面的潜力,为更安全的纳米技术发展提供了启示。
期刊介绍:
The Beilstein Journal of Nanotechnology is an international, peer-reviewed, Open Access journal. It provides a unique platform for rapid publication without any charges (free for author and reader) – Platinum Open Access. The content is freely accessible 365 days a year to any user worldwide. Articles are available online immediately upon publication and are publicly archived in all major repositories. In addition, it provides a platform for publishing thematic issues (theme-based collections of articles) on topical issues in nanoscience and nanotechnology.
The journal is published and completely funded by the Beilstein-Institut, a non-profit foundation located in Frankfurt am Main, Germany. The editor-in-chief is Professor Thomas Schimmel – Karlsruhe Institute of Technology. He is supported by more than 20 associate editors who are responsible for a particular subject area within the scope of the journal.