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Raj A, Thomas RK, Vidya L, Aparna VM, Neelima S, Sudarsanakumar C. Exploring the cytotoxicity on human lung cancer cells and DNA binding stratagem of camptothecin functionalised silver nanoparticles through multi-spectroscopic, and calorimetric approach. Sci Rep 2023; 13:9045. [PMID: 37270606 DOI: 10.1038/s41598-023-34997-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2022] [Accepted: 05/11/2023] [Indexed: 06/05/2023] Open
Abstract
The influence of nanoparticles inside the human body and their interactions with biological macromolecules need to be explored/studied prior to specific applications. The objective of this study is to find the potential of camptothecin functionalised silver nanoparticles (CMT-AgNPs) in biomedical applications. This article primarily investigates the binding stratagem of CMT-AgNPs with calf thymus DNA (ctDNA) through a series of spectroscopic and calorimetric methods and then analyses the anticancer activity and cytotoxicity of CMT-AgNPs. The nanoparticles were synthesized using a simple one pot method and characterized using UV-Visible, fourier transform infrared (FTIR) spectroscopy, X-ray diffraction and high-resolution transmission electron microscopy (HRTEM). The average size of CMT-AgNPs is 10 ± 2 nm. A group of experimental techniques such as UV-Visible spectrophotometry, fluorescence dye displacement assay, circular dichroism (CD) and viscosity analysis unravelled the typical groove binding mode of CMT-AgNPs with ctDNA. The CD measurement evidenced the minor conformational alterations of double helical structure of ctDNA in the presence of CMT-AgNPs. The information deduced from the isothermal titration calorimetry (ITC) experiment is that the binding was exothermic and spontaneous in nature. Moreover, all the thermodynamic binding parameters were extracted from the ITC data. The binding constants obtained from UV absorption experiments, fluorescence dye displacement studies and ITC were consistently in the order of 104 Mol-1. All these results validated the formation of CMT-AgNPs-ctDNA complex and the results unambiguously confirm the typical groove binding mode of CMT-AgNPs. An exhaustive in vitro MTT assay by CMT-AgNPs and CMT against A549, HT29, HeLa and L929 cell lines revealed the capability of CMT-AgNPs as a potential anticancer agent.
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Affiliation(s)
- Aparna Raj
- School of Pure and Applied Physics, Mahatma Gandhi University, P.D Hills (P.O), Kottayam, Kerala, 686 560, India
| | - Riju K Thomas
- School of Pure and Applied Physics, Mahatma Gandhi University, P.D Hills (P.O), Kottayam, Kerala, 686 560, India
- Bharata Mata College, Thrikkakara, Ernakulam, Kerala, 682032, India
| | - L Vidya
- School of Pure and Applied Physics, Mahatma Gandhi University, P.D Hills (P.O), Kottayam, Kerala, 686 560, India
| | - V M Aparna
- School of Pure and Applied Physics, Mahatma Gandhi University, P.D Hills (P.O), Kottayam, Kerala, 686 560, India
| | - S Neelima
- School of Pure and Applied Physics, Mahatma Gandhi University, P.D Hills (P.O), Kottayam, Kerala, 686 560, India
| | - C Sudarsanakumar
- School of Pure and Applied Physics, Mahatma Gandhi University, P.D Hills (P.O), Kottayam, Kerala, 686 560, India.
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Pandey A, Sarkar S, Pandey SK, Srivastava A. Silica Nanospheres Coated Silver Islands as an Effective Opto-Plasmonic SERS Active Platform for Rapid and Sensitive Detection of Prostate Cancer Biomarkers. Molecules 2022; 27:7821. [PMID: 36431921 PMCID: PMC9697738 DOI: 10.3390/molecules27227821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Revised: 11/08/2022] [Accepted: 11/10/2022] [Indexed: 11/16/2022] Open
Abstract
The in vitro diagnostics of cancer are not represented well yet, but the need for early-stage detection is undeniable. In recent decades, surface-enhanced Raman spectroscopy (SERS) has emerged as an efficient, adaptable, and unique technique for the detection of cancer molecules in their early stages. Herein, we demonstrate an opto-plasmonic hybrid structure for sensitive detection of the prostate cancer biomarker sarcosine using silica nanospheres coated silver nano-islands as a facile and efficient SERS active substrate. The SERS active platform has been developed via thin (5-15 nm) deposition of silver islands using a simple and cost-effective Radio Frequency (RF) sputtering technique followed by the synthesis and decoration of silica nanospheres (~500 nm) synthesized via Stober's method. It is anticipated that the coupling of Whispering Gallery Modes and photonic nano-jets in SiO2 nanospheres induce Localized Surface Plasmon Resonance (LSPR) in Ag nano-islands, which is responsible for the SERS enhancement. The as-fabricated SERS active platform shows a linear response in the physiological range (10 nM to 100 μM) and an extremely low limit of detection (LOD) of 1.76 nM with a correlation coefficient of 0.98 and enhancement factor ~2 × 107. The findings suggest that our fabricated SERS platform could be potentially used for the rapid detection of bio-chemical traces with high sensitivity.
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Affiliation(s)
- Anamika Pandey
- Department of Physics, Institute of Science, Banaras Hindu University, Varanasi 221005, India
| | - Subhankar Sarkar
- School of Computational and Integrative Sciences, Jawaharlal Nehru University, New Delhi 110067, India
| | - Sumit Kumar Pandey
- Department of Physics, Institute of Science, Banaras Hindu University, Varanasi 221005, India
| | - Anchal Srivastava
- Department of Physics, Institute of Science, Banaras Hindu University, Varanasi 221005, India
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Sun J, He Y, He S, Liu D, Lu K, Yao W, Jia N. A self-powered photoelectrochemical cathodic molecular imprinting sensor based on Au@TiO2 nanorods photoanode and Cu2O photocathode for sensitive detection of sarcosine. Biosens Bioelectron 2022; 204:114056. [DOI: 10.1016/j.bios.2022.114056] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2021] [Revised: 01/24/2022] [Accepted: 01/27/2022] [Indexed: 12/20/2022]
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Premkumar R, Hussain S, Jayram ND, Koyambo-Konzapa SJ, Revathy M, Mathavan T, Milton Franklin Benial A. Adsorption and orientation characteristics of 1-methylpyrrole-2-carbonyl chloride using SERS and DFT investigations. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.132201] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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One-Pot Pulsed Laser Ablation Route Assisted Molybdenum Trioxide Nano-Belts Doped in PVA/CMC Blend for the Optical and Electrical Properties Enhancement. J Inorg Organomet Polym Mater 2022. [DOI: 10.1007/s10904-022-02257-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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SERS and DFT investigations of methyl 4‑bromo-1H-pyrrole-2-carboxylate adsorbed on silver and gold substrates: In perspective of biosensor applications. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130272] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Srisung S, Wasukan N, Kuno M, Somsri S, Tanjedrew N. Raman enhanced scattering and DFT studies on the adsorption behaviour of dithizone on silver nanoparticle. INORG CHEM COMMUN 2021. [DOI: 10.1016/j.inoche.2021.108480] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
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Role of 2‒ 13C Isotopic Glyphosate Adsorption on Silver Nanoparticles Based on Ninhydrin Reaction: A Study Based on Surface-Enhanced Raman Spectroscopy. NANOMATERIALS 2020; 10:nano10122539. [PMID: 33348667 PMCID: PMC7766329 DOI: 10.3390/nano10122539] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Revised: 12/10/2020] [Accepted: 12/12/2020] [Indexed: 12/16/2022]
Abstract
Glyphosate is one of the most commonly used and non-selective herbicides in agriculture, which may directly pollute the environment and threaten human health. A simple and effective approach to its detection is thus quite necessary. Surface-enhanced Raman scattering (SERS) spectroscopy was shown to be a very effective method to approach the problem. However, sensitivity in SERS experiments is quite low, caused by different orientation/conformation of the adsorbed molecules on the metal surface, which limit its detection by using SERS. In this paper, 2‒13C‒glyphosate (hereafter: 13-GLP) was designed as a model molecule for theoretical and experimental studies of the molecule structure. Vibrational modes were assigned based on the modeling results obtained at the B3LYP/6-311++G** level by density functional theory (DFT) calculations, which were performed to predict the FT‒IR and Raman spectra. Band downshifts were caused by 13C atom isotopic substitution with mass changed. Moreover, SERS spectra of 13-GLP by combining ninhydrin reaction on Ag NPs were obtained. Isotopic Raman shifts are helpful in identifying the components of each Raman band through vibrations across the molecular system. They are coupled by probe molecules and thus bind to the substrates, indirectly offering the opportunity to promote interactions with Ag NPs and reduce the complex equilibrium between different orientation/conformation of glyphosate molecules on the metal surface.
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Premkumar R, Hussain S, Mathavan T, Anitha K, Benial AMF. Surface-enhanced Raman scattering and quantum chemical studies of 2-trifluoroacetylpyrrole chemisorbed on colloidal silver and gold nanoparticles: A comparative study. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.111209] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Green synthesis of silver nanoparticles and investigation of their colorimetric sensing and cytotoxicity effects. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.05.145] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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