Journal
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
Volume 253, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.ijbiomac.2023.126829
Keywords
Gold nanorods; Curcumin; Optical nanobiosensor; Sequence-specific DNA; Cytotoxicity
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We report here a gold nanorod-based optical sensing platform induced by curcumin for the detection of specific DNA targets. The platform shows high sensitivity and selectivity, making it suitable for DNA detection related to cancer cells.
We are reporting curcumin-induced gold nanorods as an optical sensing platform for the detection of sequence specific DNA target through their self-assembly. The combined effect of eco-friendly reducing agent (i.e., cur cumin) and silver nitrate in a basic medium (i.e., pH 10) has been attributed for the formation of small gold nanorods (AuNRs) having approximate length and diameter i.e., 19.7 +/- 0.8 nm and 6.0 +/- 0.5 nm, respectively, and lower longitudinal surface plasmon resonance (SPR) enable to detect and analyse different biomarkers. Further, for evaluating cellular uptake of as-synthesized AuNRs, the cytotoxicity study has been carried out by 3(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-2H-tetrazolium bromide (MTT) assay on A549 cells and HEPG2 cell lines, respectively, and shown approximately similar cytotoxicity. Interestingly, as-synthesized optically and electronically active AuNRs based nanobiosensing platform enable to detect sequence-specific DNA targets with low level of detection limit i.e., LOD 8.6 +/- 0.15 pM for complimentary target (CT) DNA with higher sensitivity and better selectivity. Finally, this study is suggesting a simplistic bio-mediated approach of tuning the shape and size of AuNRs for sensitive, selective and reliable nanobiosensing platform for sequence-specific DNA detection related to cancer cells.
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