Interactions between gold nanoparticles with different morphologies and human serum albumin

作者：Jiahui Dai, Chao Chen, Man Yin, Huixing Li, Wenbo Li, Zhaowei Zhang, Qian Wang, Zhongyu Du, Xiangyu Xu, Yunfei Wang · 发表于：Frontiers in Chemistry · 年份：2023 · DOI：10.3389/fchem.2023.1273388 · 被引用次数：25 · 研究领域：Protein Interaction Studies and Fluorescence Analysis、Gold and Silver Nanoparticles Synthesis and Applications、Surfactants and Colloidal Systems

Introduction: Three different shapes of gold nanoparticles were synthesized in this experiment. At the same time, studies compared their effects with human serum albumin (HSA). Methods: Gold nanoparticles (AuNPs) with three different morphologies, such as, nanospheres (AuNSs), nanorods (AuNRs), and nanoflowers (AuNFs) were synthesized via a seeding method and their characteristic absorption peaks were detected using ultraviolet-visible (UV-vis) absorption spectroscopy, Telectron microscopy (TEM), Dynamic Light Scattering (DLS) and Zeta potential measurements, circular dichroism (CD), and Fourier transform infrared spectroscopy (FTIR) to study the interactions between them and HSA. By comparing the thermodynamic parameters and quenching mechanism of the three materials, similarities and differences were determined in their interactions with HSA. Results: The results showed that with an increase in the concentration of the AuNPs with the three different morphologies, the UV-vis absorption peak intensity of the mixed solution increased, but its fluorescence intensity was quenched. This indicates that the three types of AuNPs interact with HSA, and that the interactions between them represent a static quenching process, which is consistent with the conclusions derived from three-dimensional fluorescence experiments. Through variable-temperature fluorescence experiments, the binding constants, number of binding sites, and thermodynamic parameters of the interactions between the th...