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Feng H, Luo M, Zhu G, Mokeira KD, Yang Y, Lv Y, Tan Q, Lei X, Zeng H, Cheng H, Xu S. A facile electrochemical aptasensor for chloramphenicol detection based on synergistically photosensitization enhanced by SYBR Green I and MoS 2. J Colloid Interface Sci 2024; 672:236-243. [PMID: 38838631 DOI: 10.1016/j.jcis.2024.05.109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Revised: 05/02/2024] [Accepted: 05/15/2024] [Indexed: 06/07/2024]
Abstract
This study reports the development of a photocatalytic electrochemical aptasensor for the purpose of detecting chloramphenicol (CAP) antibiotic residues in water by utilizing SYBR Green I (SG) and chemically exfoliated MoS2 (ce-MoS2) as synergistically signal-amplification platforms. The Au nanoparticles (AuNPs) were electrodeposited onto the surface of an indium tin oxide (ITO) electrode. After that, the thiolate-modified cDNA, also known as capture DNA, was combined with the aptamer. Subsequently, photosensitized SG molecules and ce-MoS2 nanomaterial were inserted into the groove of the resultant double-stranded DNA (dsDNA). The activation of the photocatalytic process upon exposure to light resulted in the generation of singlet oxygen. The singlet oxygen effectively split the dsDNA, resulting in significant enhancement in the current of [Fe(CN)6]3-/4-. When the CAP was present, both SG molecules and ce-MoS2 broke away from the dsDNA, which turned off the photosensitization response, leading to significant reduction in the current of [Fe(CN)6]3-/4-. Under the optimal conditions, the aptasensor exhibited a linear relationship between the current of [Fe(CN)6]3-/4- with logarithmic concentrations of CAP from 20 to 1000 nM, with a detection of limit (3σ) of 3.391 nM. The aptasensor also demonstrated good selectivity towards CAP in the presence of interfering antibiotics, such as tetracycline, streptomycin, levofloxacin, ciprofloxacin, and sulfadimethoxine. Additionally, the results obtained from the analysis of natural water samples using the proposed aptasensor were consistent with the findings acquired through the use of a liquid chromatograph-mass spectrometer. Therefore, with its simplicity and high selectivity, this aptasensor can potentially detect alternative antibiotics in environmental water samples by replacing the aptamers based on photosensitization.
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Affiliation(s)
- Hui Feng
- College of Ecology and Environment, Chengdu University of Technology, Chengdu 610059, China.
| | - Meng Luo
- College of Ecology and Environment, Chengdu University of Technology, Chengdu 610059, China.
| | - Guonian Zhu
- College of Ecology and Environment, Chengdu University of Technology, Chengdu 610059, China
| | - Kerage Dorothy Mokeira
- College of Ecology and Environment, Chengdu University of Technology, Chengdu 610059, China
| | - Yaoxin Yang
- College of Ecology and Environment, Chengdu University of Technology, Chengdu 610059, China
| | - Yongxin Lv
- College of Ecology and Environment, Chengdu University of Technology, Chengdu 610059, China
| | - Qing Tan
- Chengdu Ecological and Environmental Monitoring Center of Sichuan Province, Chengdu, Sichuan 610066, China
| | - Xiangwen Lei
- College of Ecology and Environment, Chengdu University of Technology, Chengdu 610059, China
| | - Hang Zeng
- College of Ecology and Environment, Chengdu University of Technology, Chengdu 610059, China
| | - Hefa Cheng
- MOE Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China.
| | - Shuxia Xu
- College of Ecology and Environment, Chengdu University of Technology, Chengdu 610059, China; State Environmental Protection Key Laboratory of Synergetic Control and Joint Remediation for Soil & Water Pollution, Chengdu University of Technology, Chengdu 610059, China.
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He S, Lian H, Cao X, Liu B, Wei X. Light-Driven Photocatalytic-Photothermal Synergetic System for Portable and Sensitive Nucleic Acid Quantification. Anal Chem 2023; 95:17613-17621. [PMID: 37978913 DOI: 10.1021/acs.analchem.3c03274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2023]
Abstract
Photosensitizers and photothermal agents have attracted increasing attention for in vitro diagnosis, but the combination remains challenging. Herein, a light-driven photocatalytic-photothermal synergetic system integrated microfluidic distance-based analytical device (PCPT-μDAD) for visual, portable, sensitive, and quantitative detection of targets was developed. Target DNA was recognized and initiated the hybridization chain reaction to form a double-stranded DNA/SYBR Green I (dsDNA/SG-I) complex. By applying the photosensitization of the dsDNA/SG-I complex and the photothermal effect of oxidized 3,3',5,5'-tetramethylbenzidine, the target concentration can effectively translate into a visual distance signal readout. Importantly, the light-driven PCPT-μDAD greatly improves the controllability of catalytic reactions and signal amplification efficiency. The light-driven PCPT-μDAD shows a low limit of detection (fM level), good stability, and high reproducibility for nucleic acid detection.
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Affiliation(s)
- Shan He
- College of Materials Science and Engineering, Huaqiao University, Xiamen 361021, China
| | - Huiting Lian
- College of Materials Science and Engineering, Huaqiao University, Xiamen 361021, China
- Key Laboratory of Molecular Designing and Green Conversions, Huaqiao University, Xiamen 361021, China
| | - Xuegong Cao
- College of Materials Science and Engineering, Huaqiao University, Xiamen 361021, China
- Key Laboratory of Molecular Designing and Green Conversions, Huaqiao University, Xiamen 361021, China
| | - Bin Liu
- College of Materials Science and Engineering, Huaqiao University, Xiamen 361021, China
- Key Laboratory of Molecular Designing and Green Conversions, Huaqiao University, Xiamen 361021, China
- Xiamen Key Laboratory of Optoelectronic Materials and Advanced Manufacturing, Huaqiao University, Xiamen 361021, China
| | - Xiaofeng Wei
- College of Materials Science and Engineering, Huaqiao University, Xiamen 361021, China
- Key Laboratory of Molecular Designing and Green Conversions, Huaqiao University, Xiamen 361021, China
- Xiamen Key Laboratory of Optoelectronic Materials and Advanced Manufacturing, Huaqiao University, Xiamen 361021, China
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Morozov VN, Klimovich MA, Shibaeva AV, Klimovich ON, Koshevaya ED, Kolyvanova MA, Kuzmin VA. Optical Polymorphism of Liquid-Crystalline Dispersions of DNA at High Concentrations of Crowding Polymer. Int J Mol Sci 2023; 24:11365. [PMID: 37511123 PMCID: PMC10379083 DOI: 10.3390/ijms241411365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2023] [Revised: 07/03/2023] [Accepted: 07/04/2023] [Indexed: 07/30/2023] Open
Abstract
Optically active liquid-crystalline dispersions (LCD) of nucleic acids, obtained by polymer- and salt-induced (psi-) condensation, e.g., by mixing of aqueous saline solutions of low molecular weight DNA (≤106 Da) and polyethylene glycol (PEG), possess an outstanding circular dichroism (CD) signal (so-called psi-CD) and are of interest for sensor applications. Typically, such CD signals are observed in PEG content from ≈12.5% to ≈22%. However, in the literature, there are very conflicting data on the existence of psi-CD in DNA LCDs at a higher content of crowding polymer up to 30-40%. In the present work, we demonstrate that, in the range of PEG content in the system above ≈24%, optically polymorphic LCDs can be formed, characterized by both negative and positive psi-CD signals, as well as by ones rather slightly differing from the spectrum of isotropic DNA solution. Such a change in the CD signal is determined by the concentration of the stock solution of PEG used for the preparation of LCDs. We assume that various saturation of polymer chains with water molecules may affect the amount of active water, which in turn leads to a change in the hydration of DNA molecules and their transition from B-form to Z-form.
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Affiliation(s)
- Vladimir N Morozov
- Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 4 Kosygina, 119334 Moscow, Russia
| | - Mikhail A Klimovich
- Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 4 Kosygina, 119334 Moscow, Russia
- Burnazyan Federal Medical Biophysical Center, Federal Medical Biological Agency of the Russian Federation, 23 Marshala Novikova, 123182 Moscow, Russia
| | - Anna V Shibaeva
- Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 4 Kosygina, 119334 Moscow, Russia
| | - Olga N Klimovich
- Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 4 Kosygina, 119334 Moscow, Russia
| | - Ekaterina D Koshevaya
- Burnazyan Federal Medical Biophysical Center, Federal Medical Biological Agency of the Russian Federation, 23 Marshala Novikova, 123182 Moscow, Russia
| | - Maria A Kolyvanova
- Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 4 Kosygina, 119334 Moscow, Russia
- Burnazyan Federal Medical Biophysical Center, Federal Medical Biological Agency of the Russian Federation, 23 Marshala Novikova, 123182 Moscow, Russia
| | - Vladimir A Kuzmin
- Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 4 Kosygina, 119334 Moscow, Russia
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A liquid crystal world for the origins of life. Emerg Top Life Sci 2022; 6:557-569. [PMID: 36373852 DOI: 10.1042/etls20220081] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 10/23/2022] [Accepted: 10/27/2022] [Indexed: 11/16/2022]
Abstract
Nucleic acids (NAs) in modern biology accomplish a variety of tasks, and the emergence of primitive nucleic acids is broadly recognized as a crucial step for the emergence of life. While modern NAs have been optimized by evolution to accomplish various biological functions, such as catalysis or transmission of genetic information, primitive NAs could have emerged and been selected based on more rudimental chemical-physical properties, such as their propensity to self-assemble into supramolecular structures. One such supramolecular structure available to primitive NAs are liquid crystal (LC) phases, which are the outcome of the collective behavior of short DNA or RNA oligomers or monomers that self-assemble into linear aggregates by combinations of pairing and stacking. Formation of NA LCs could have provided many essential advantages for a primitive evolving system, including the selection of potential genetic polymers based on structure, protection by compartmentalization, elongation, and recombination by enhanced abiotic ligation. Here, we review recent studies on NA LC assembly, structure, and functions with potential prebiotic relevance. Finally, we discuss environmental or geological conditions on early Earth that could have promoted (or inhibited) primitive NA LC formation and highlight future investigation axes essential to further understanding of how LCs could have contributed to the emergence of life.
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Taketomi Y, Yamaguchi Y, Sakurai S, Tanaka M. Evaluation of DNA-mediated electron transfer using a hole-trapping nucleobase under crowded conditions. Org Biomol Chem 2022; 20:2043-2047. [PMID: 35005766 DOI: 10.1039/d1ob01669e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The effects of a crowded environment on DNA-mediated electron transfer were evaluated using a pyrene-modified oligonucleotide containing a hole-trapping nucleobase in poly(ethylene glycol) mixed solutions. Rapid decompositions of hole-trapping bases in condensed and noncondensed DNA showed that more efficient electron transfer occurred under crowded conditions than in dilute solutions.
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Affiliation(s)
- Yuuki Taketomi
- Department of Engineering Science, Graduate School of Informatics and Engineering, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan.
| | - Yuuki Yamaguchi
- Department of Engineering Science, Graduate School of Informatics and Engineering, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan.
| | - Shunsuke Sakurai
- Department of Engineering Science, Graduate School of Informatics and Engineering, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan.
| | - Makiko Tanaka
- Department of Engineering Science, Graduate School of Informatics and Engineering, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan.
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Liquid Crystal Peptide/DNA Coacervates in the Context of Prebiotic Molecular Evolution. CRYSTALS 2020. [DOI: 10.3390/cryst10110964] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Liquid–liquid phase separation (LLPS) phenomena are ubiquitous in biological systems, as various cellular LLPS structures control important biological processes. Due to their ease of in vitro assembly into membraneless compartments and their presence within modern cells, LLPS systems have been postulated to be one potential form that the first cells on Earth took on. Recently, liquid crystal (LC)-coacervate droplets assembled from aqueous solutions of short double-stranded DNA (s-dsDNA) and poly-L-lysine (PLL) have been reported. Such LC-coacervates conjugate the advantages of an associative LLPS with the relevant long-range ordering and fluidity properties typical of LC, which reflect and propagate the physico-chemical properties of their molecular constituents. Here, we investigate the structure, assembly, and function of DNA LC-coacervates in the context of prebiotic molecular evolution and the emergence of functional protocells on early Earth. We observe through polarization microscopy that LC-coacervate systems can be dynamically assembled and disassembled based on prebiotically available environmental factors including temperature, salinity, and dehydration/rehydration cycles. Based on these observations, we discuss how LC-coacervates can in principle provide selective pressures effecting and sustaining chemical evolution within partially ordered compartments. Finally, we speculate about the potential for LC-coacervates to perform various biologically relevant properties, such as segregation and concentration of biomolecules, catalysis, and scaffolding, potentially providing additional structural complexity, such as linearization of nucleic acids and peptides within the LC ordered matrix, that could have promoted more efficient polymerization. While there are still a number of remaining open questions regarding coacervates, as protocell models, including how modern biologies acquired such membraneless organelles, further elucidation of the structure and function of different LLPS systems in the context of origins of life and prebiotic chemistry could provide new insights for understanding new pathways of molecular evolution possibly leading to the emergence of the first cells on Earth.
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