Synthesis and in vitro antibacterial behavior of curcumin-conjugated gold nanoparticles. Issue 13 (16th March 2023)

• Record Type: Journal Article
• Authors: Pandey, Maneesha; Singh, Ashish Kumar; Pandey, P. C.
• Is Part Of: Journal of materials chemistry. Volume 11:Issue 13(2023)
• Page Start: 3014
• Page End: 3026
• Publication Date: 2023-03-16
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Biomedical materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d2tb02256g
• Languages: English
• ISSNs: 2050-750X

Abstract

Abstract : This study demonstrated a simple route to conjugate curcumin with AuNPs, which are highly stable in an aqueous medium at room temperature. The conjugated Cur–AuNPs showed selective synergistic toxicity on bacteria cells over mammalian cells. Abstract : Owing to the rise in multidrug-resistant bacterial diseases and the dwindling supply of newer antibiotics, it is crucial to discover newer compounds or modify current compounds for more effective antimicrobial therapies. According to reports, more than 80% of bacterial infections have been linked to bacterial biofilms. In addition to having antimicrobial properties, the hydrophobic polyphenol curcumin (Cur) also inhibits quorum sensing. The application of curcumin was constrained by its weak aqueous solubility and quick degradation. Over the past years, nanotechnology-based biomaterials with multi-functional characteristics have been engineered with high interest. The present study focused on the development of nano-biomaterials with excellent testifiers for bacterial infection in vitro . In this study, water dispersibility and stability of curcumin were improved through conjugation with gold nanoparticles. The successful synthesis of curcumin-conjugated gold nanoparticles (Cur–AuNPs) was confirmed using X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, and UV-vis absorbance spectroscopy. Transmission electron microscopy (TEM) revealed an average particle size of about 10–13 nm. The antibacterial characteristics in terms of the minimum inhibitory concentration (MIC) of Cur–AuNP treatments were found to be lowest than those with AuNPs and Cur treatments. The quantitative analysis revealed the superior antibacterial characteristics of Cur–AuNP-treated bacterial cells compared to the untreated samples. In addition, curcumin-conjugated AuNPs, produced more reactive oxygen species and increased the membrane permeability. Besides, the biocompatibility of Cur–AuNPs was also assessed quantitatively and qualitatively. Statistical analyses revealed the augmented MG-63 cell proliferation in Cur–AuNPs compared to those with Cur and AuNPs treatments. Overall, Cur–AuNPs exhibited enhanced antibacterial, and antibiofilm characteristics and cytocompatibility.