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A Novel Fluorescent Aptasensor for Arsenic(III) Detection Based on a Triple-Helix Molecular Switch. Molecules 2023; 28:molecules28052341. [PMID: 36903586 PMCID: PMC10005410 DOI: 10.3390/molecules28052341] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 02/21/2023] [Accepted: 03/01/2023] [Indexed: 03/06/2023] Open
Abstract
A novel aptamer-based fluorescent-sensing platform with a triple-helix molecular switch (THMS) was proposed as a switch for detecting the arsenic(III) ion. The triple helix structure was prepared by binding a signal transduction probe and arsenic aptamer. Additionally, the signal transduction probe labeled with fluorophore (FAM) and quencher (BHQ1) was employed as a signal indicator. The proposed aptasensor is rapid, simple and sensitive, with a limit of detection of 69.95 nM. The decrease in peak fluorescence intensity shows a linear dependence, with the concentration of As(III) in the range of 0.1 µM to 2.5 µM. The whole detection process takes 30 min. Moreover, the THMS-based aptasensor was also successfully used to detect As(III) in a real sample of Huangpu River water with good recoveries. The aptamer-based THMS also presents distinct advantages in stability and selectivity. The proposed strategy developed herein can be extensively applied in the field of food inspection.
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Low-cost, portable, on-site fluorescent detection of As(III) by a paper-based microfluidic device based on aptamer and smartphone imaging. Mikrochim Acta 2023; 190:109. [PMID: 36867213 DOI: 10.1007/s00604-023-05693-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Accepted: 02/08/2023] [Indexed: 03/04/2023]
Abstract
A turn-on fluorescent aptasensor based on a paper-based microfluidic chip was developed to detect arsenite via aptamer competition strategy and smartphone imaging. The chip was prepared by wax-printing hydrophilic channels on filter paper. It is portable, low-cost, and environmentally friendly. Double-stranded DNA consisting of aptamer and fluorescence-labeled complementary strands was immobilized on the reaction zone of the paper chip. Due to the specific strong binding between aptamer and arsenite, the fluorescent complementary strand was squeezed out and driven by capillary force to the detection area of the paper chip, so that the fluorescent signal arose in the detection area under the excitation wavelength of 488 nm. Arsenite can be quantified by using smartphone imaging and RGB image analysis. Under the optimal conditions, the paper-based microfluidic aptasensor exhibited excellent linear response over a wide range of 1 to 1000 nM, with a detection limit as low as 0.96 nM (3σ).
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Bharathi D, Nandagopal JGT, Ranjithkumar R, Gupta PK, Djearamane S. Microbial approaches for sustainable remediation of dye-contaminated wastewater: a review. Arch Microbiol 2022; 204:169. [PMID: 35157149 DOI: 10.1007/s00203-022-02767-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2021] [Revised: 01/12/2022] [Accepted: 01/14/2022] [Indexed: 11/02/2022]
Abstract
The coloured effluents produced from different industries, such as textile, plastics, printing, cosmetics, leather and paper, are extremely toxic and a tremendous threat to the aquatic organisms and human beings. The removal of coloured dye pollutants from the aqueous environment is a great challenge and a pressing task. The growing demand for low-cost and efficient treatment approaches has given rise to alternative and eco-friendly methods, such as biodegradation and microbial remediation. This work summarizes the overview and current research on the remediation of dye pollutants from the aqueous environment by microbial bio-sorbents, such as bacteria, fungi, algae, and yeast. In addition, dye degradation capabilities of microbial enzymes have been highlighted and discussed. Further, the influence of various experimental parameters, such as temperature, pH, and concentrations of nutrients, and dye, has been summarized. The proposed mechanism for dye removal by microorganisms is also discussed. The object of this review is to provide a state-of-the-art of microbial remediation technologies in eliminating dye pollutants from water resources.
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Affiliation(s)
- Devaraj Bharathi
- Department of Biotechnology, Hindusthan College of Arts and Science, Coimbatore, Tamil Nadu, 641028, India.
| | | | | | - Piyush Kumar Gupta
- Department of Life Sciences, School of Basic Sciences and Research, Sharda University, Greater Noida, Uttar Pradesh, 201310, India
| | - Sinouvassane Djearamane
- Department of Biomedical Science, Faculty of Science, Universiti Tunku Abdul Rahman, Jalan University, Bandar Barat, 31900, Kampar, Perak, Malaysia
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Huang C, Zhou Y, Yu G, Zeng J, Li Q, Shen K, Wu X, Guo R, Zhang C, Zheng B, Wang J. Glutathione-functionalized long-period fiber gratings sensor based on surface plasmon resonance for detection of As 3+ ions. NANOTECHNOLOGY 2021; 32. [PMID: 34359058 DOI: 10.1088/1361-6528/ac1b56] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Accepted: 08/05/2021] [Indexed: 05/14/2023]
Abstract
Development of simple and accurate methods for the detection of As3+is highly desirable and technically important. In this work, a highly sensitive and selective long-period fiber gratings sensor based on surface plasmon resonance was developed for As3+detection by designing glutathione-functionalized Au nanoparticles as a signal amplification tag. Based on the chemical interaction between As3+and glutathione, the self-assembling glutathione on the surface of the gold film combines selectively with As3+, and then anchors the glutathione-functionalized Au nanoparticles, which changes the refractive index of the surrounding environment, resulting in a shift of the transmission spectrum. Results show that the sensor could detect As3+with concentrations ranging from 0.02 to 2 ppb. The sensor exhibited excellent specificity for As3+against other metal ions, such as Na+, Fe3+, Mg2+, Cu2+, Pb2+, Ni2+, Ba2+, and Co3+. The fiber sensor was successfully employed to detect As3+in pond water samples, demonstrating that it has the potential for As3+detection with the advantages of low cost, high sensitivity, and a simple structure.
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Affiliation(s)
- Chunlei Huang
- Fujian Key Laboratory of Novel Functional Textile Fibers and Materials, Center for Advanced Marine Materials and Smart Sensors, Minjiang University, Fuzhou, 350108, People's Republic of China
- College of Physics and Electronic Information Engineering, Minjiang University, Fuzhou, 350108, People's Republic of China
| | - Yingwu Zhou
- College of Physics and Electronic Information Engineering, Minjiang University, Fuzhou, 350108, People's Republic of China
| | - Genjian Yu
- Fujian Key Laboratory of Information Processing and Intelligent Control, Minjiang University, Fuzhou, 350108, People's Republic of China
| | - Jing Zeng
- Ocean College of Minjiang University, Minjiang University, Fuzhou 350108, People's Republic of China
| | - Qin Li
- Ocean College of Minjiang University, Minjiang University, Fuzhou 350108, People's Republic of China
| | - Kaize Shen
- Ocean College of Minjiang University, Minjiang University, Fuzhou 350108, People's Republic of China
| | - Xuejin Wu
- Ocean College of Minjiang University, Minjiang University, Fuzhou 350108, People's Republic of China
| | - Rongxiang Guo
- Ocean College of Minjiang University, Minjiang University, Fuzhou 350108, People's Republic of China
| | - Cheng Zhang
- College of Physics and Electronic Information Engineering, Minjiang University, Fuzhou, 350108, People's Republic of China
- Fujian Key Laboratory of Functional Marine Sensing Materials, Center for Advanced Marine Materials and Smart Sensors, Minjiang University, Fuzhou 350108, People's Republic of China
| | - Biao Zheng
- College of Physics and Electronic Information Engineering, Minjiang University, Fuzhou, 350108, People's Republic of China
- Fujian Key Laboratory of Functional Marine Sensing Materials, Center for Advanced Marine Materials and Smart Sensors, Minjiang University, Fuzhou 350108, People's Republic of China
| | - Jun Wang
- College of Physics and Electronic Information Engineering, Minjiang University, Fuzhou, 350108, People's Republic of China
- Fujian Key Laboratory of Functional Marine Sensing Materials, Center for Advanced Marine Materials and Smart Sensors, Minjiang University, Fuzhou 350108, People's Republic of China
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