Flavonoid-Capped Gold Nanoparticles from Boesenbergia rotunda: Enhanced Antioxidant Activity and Cyclin-Dependent Kinase 2 (CDK2) Inhibition via Molecular Docking

https://doi.org/10.22146/ijc.116010

Dini Nur Fauzia(1*), Afaf Baktir(2), Titik Taufikurohmah(3), Intan Permata Sari(4), Dzikra Nasyaya Mahfudhah(5), Mochamad Zakki Fahmi(6)

(1) Doctoral Program of Mathematics and Natural Sciences, Faculty of Science and Technology, Universitas Airlangga, Jl. Dr. Ir. H. Soekarno, Mulyorejo, Surabaya 60115, Indonesia; Department of Chemistry, Faculty of Science and Technology, Universitas Airlangga, Jl. Dr. Ir. H. Soekarno, Mulyorejo, Surabaya 60115, Indonesia
(2) Department of Chemistry, Faculty of Science and Technology, Universitas Airlangga, Jl. Dr. Ir. H. Soekarno, Mulyorejo, Surabaya 60115, Indonesia
(3) Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Negeri Surabaya, Jl. Ketintang, Surabaya 60231, Indonesia
(4) Master’s Program in Chemistry, Faculty of Science and Technology, Universitas Airlangga, Jl. Dr. Ir. H. Soekarno, Mulyorejo, Surabaya 60115, Indonesia
(5) Master’s Program in Chemistry, Faculty of Science and Technology, Universitas Airlangga, Jl. Dr. Ir. H. Soekarno, Mulyorejo, Surabaya 60115, Indonesia
(6) Department of Chemistry, Faculty of Science and Technology, Universitas Airlangga, Jl. Dr. Ir. H. Soekarno, Mulyorejo, Surabaya 60115, Indonesia
(*) Corresponding Author

Abstract


The green synthesis of gold nanoparticles (Br-AuNPs) using ethanolic extracts of Boesenbergia rotunda offers an eco-friendly approach to producing bioactive nanomaterials. This study aimed to synthesize Br-AuNPs and evaluate their antioxidant activity alongside in silico analysis of flavonoid interactions with the CDK2/cyclin A complex. The formation of Br-AuNPs was confirmed by a visible color change and a distinct SPR peak at 538–542 nm. TEM analysis revealed spherical nanoparticles with an average diameter of 14.35 ± 3.16 nm, stable for up to four months. Antioxidant activity assessed via the ABTS assay showed that Br-AuNPs exhibited significantly higher radical scavenging activity (69.01% at 120 µg/mL) compared to the crude extract (56.0%; p < 0.05). This enhancement is attributed to synergistic interactions between phytochemicals and nanoparticles, which improve surface reactivity. Furthermore, molecular docking studies were conducted to evaluate the interaction of major flavonoids from B. rotunda with the CDK2/cyclin A complex, where 6,8-di-(3,3-dimethylallyl)chrysin showed the most favorable binding affinity (−63.30 kcal/mol). These findings highlight the potential of Br-AuNPs as green-synthesized nanomaterials with enhanced antioxidant performance and provide a scientific basis for future investigations toward their development in anticancer-related applications.


Keywords


Boesenbergia rotunda; gold nanoparticles; flavonoids; molecular docking; anticancer activity

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References

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DOI: https://doi.org/10.22146/ijc.116010

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