Microwave synthesis of ultrasmall gold nanoparticles, their γ-globulin interaction and subsequent effects in hepatocellular carcinoma cells
Gold nanoparticles (GNPs) are widely explored for biomedical applications; however, their interactions with plasma proteins and the resulting effects on biological activity remain insufficiently understood. In this study, ultrasmall GNPs were synthesized via a solvent-polarity-controlled microwave-a...
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| Auteurs principaux: | , , , |
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| Format: | Article (Journal) |
| Langue: | anglais |
| Publié: |
December 2026
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| In: |
BMC chemistry
Year: 2026, Volume: 20, Numéro: 1, Pages: 1-18 |
| ISSN: | 2661-801X |
| DOI: | 10.1186/s13065-026-01868-0 |
| Accès en ligne: | Verlag, kostenfrei, Volltext: https://doi.org/10.1186/s13065-026-01868-0
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| Notes sur l'auteur: | Gong Chen, Shanshan Han, Xiaoyan Huang and Weiping Wei |
| Résumé: | Gold nanoparticles (GNPs) are widely explored for biomedical applications; however, their interactions with plasma proteins and the resulting effects on biological activity remain insufficiently understood. In this study, ultrasmall GNPs were synthesized via a solvent-polarity-controlled microwave-assisted reduction method using sodium citrate as a reducing agent and polyvinylpyrrolidone as a stabilizer. The synthesized GNPs exhibited a mean diameter of 6 ± 2 nm and were subsequently employed to investigate the formation and biological implications of a γ-globulin protein corona. Physicochemical characterization demonstrated that γ-globulin adsorption significantly altered the colloidal properties of GNPs, resulting in increased hydrodynamic size, reduced zeta potential, and a red-shift of the surface plasmon resonance band. Fluorescence quenching studies revealed a spontaneous interaction between GNPs and γ-globulin. Thermodynamic analysis indicated that the binding process was predominantly driven by hydrogen bonding and van der Waals interactions. Molecular docking using Au₁₃ and Au₄₃ clusters as computationally tractable models of the GNP surface further confirmed the involvement of polar amino acid residues in protein adsorption. Spectroscopic analyses showed only minor conformational perturbations in γ-globulin following interaction with GNPs. Biological evaluation demonstrated that bare GNPs exerted significant selective antiproliferative activity against HepG2 hepatocellular carcinoma cells relative to normal human hepatic L-02 cells, whereas γ-globulin-coated GNPs exhibited markedly reduced cytotoxicity. Protein corona formation decreased cellular uptake, attenuated reactive oxygen species generation, preserved antioxidant defenses, and reduced apoptosis-related signaling. These findings establish a direct mechanistic relationship between γ-globulin corona formation, nanoparticle physicochemical properties, cellular uptake, and biological response, highlighting the critical role of the nano-bio interface in determining the therapeutic performance of GNP-based systems. |
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| Description: | Online veröffentlicht: 2. Juli 2026 Im Titel ist "gamma" mit griechischem Buchstaben geschrieben Gesehen am 06.08.2026 |
| Description matérielle: | Online Resource |
| ISSN: | 2661-801X |
| DOI: | 10.1186/s13065-026-01868-0 |