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Cheng S, Ge Y, Lee Y, Yang X. Prediction of Photolysis Kinetics of Viral Genomes under UV 254 Irradiation to Estimate Virus Infectivity Loss. WATER RESEARCH 2021; 198:117165. [PMID: 33962243 DOI: 10.1016/j.watres.2021.117165] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 04/14/2021] [Accepted: 04/15/2021] [Indexed: 06/12/2023]
Abstract
UV254 irradiation disinfection is a commonly used method to inactivate pathogenic viruses in water and wastewater treatment. Model prediction method can serve as a pre-screening tool to quickly estimate the effectiveness of UV254 irradiation on emerging or unculturable viruses. In this study, an improved prediction model was applied to estimate UV254 photolysis kinetics of viral genomes (kpred, genome) based on the genome sequences and their photoreactivity and to correlate with the experimental virus infectivity loss kinetics (kexp, infectivity). The UV254 inactivation data of 102 viruses (including 2 dsRNA, 65 ssRNA, 33 dsDNA and 2 ssDNA viruses) were collected from the published experimental data with kexp, infectivity ranging from 0.016 to 3.49 cm2 mJ-1. The model had fairly good performance in predicting the virus susceptibility to UV254 irradiation except dsRNA viruses (Pearson's correlation coefficient = 0.64) and 70% of kpred, genome fell in the range of 1/2 to 2 times of kexp, infectivity. The positive deviation of the model often occurred for photoresistant viruses with low kexp, infectivity less than 0.20 cm2 mJ-1 (e.g., Adenovirus, Papovaviridae and Retroviridae). We also applied this model to predict the UV254 inactivation rate of SARS-CoV-2 (kpred, genome = 3.168 cm2 mJ-1) and a UV dose of 3 mJ cm-2 seemed to be able to achieve a 2-log removal by conservative calculation using 1/2kpred, genome value. This prediction method can be used as a prescreening tool to assess the effectiveness of UV254 irradiation for emerging/unculturable viruses in water or wastewater treatment.
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Affiliation(s)
- Shuangshuang Cheng
- School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510275, China
| | - Yuexian Ge
- School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510275, China
| | - Yunho Lee
- School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Republic of Korea
| | - Xin Yang
- School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou 510275, China.
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2
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Shokoufi N, Abbasgholi Nejad Asbaghi B, Nouri Hajibaba S. Sensitive determination of DNA based on phosphate-dye interaction using photothermal lens technique. APPLIED OPTICS 2019; 58:3074-3082. [PMID: 31044780 DOI: 10.1364/ao.58.003074] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Accepted: 03/16/2019] [Indexed: 06/09/2023]
Abstract
Photothermal lens spectrometry is a powerful optical detection technique that can be used to investigate biomolecules. In this work, for the first time to our knowledge, photothermal lens spectrometry was used for determination of nanomolar concentrations of three distinct deoxyribonucleic acid (DNA) strands using methylene blue as a labeling dye. Methylene blue interacts with phosphate groups of the DNA in lower DNA concentrations. It was observed that phosphate-methylene blue interaction had no obvious effect on methylene blue absorption and fluorescence spectra, but the photothermal lens spectrometry signal of methylene blue increased with DNA concentration. For this purpose, to evaluate the performance of the presented method, herring sperm DNA, Escherichia coli bacteria DNA, and partial 16S rRNA genes were examined. Under optimum conditions, photothermal lens spectrometry intensity of methylene blue increased linearly with DNA concentration when herring sperm DNA, Escherichia coli DNA, and 16S rRNA gene concentrations increased in the ranges of 0.1-250, 1-700, and 1-800 nmol L-1, respectively. The corresponding detection limits were found to be 0.07, 0.71, and 0.56 nmol L-1, respectively, and relative standard deviations for 50 nmol L-1 of the tested samples were 2.59%, 4.95%, and 4.57%, respectively.
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García JP, Marrón E, Martín VI, Moyá ML, Lopez-Cornejo P. Conformational changes of DNA in the presence of 12-s-12 gemini surfactants (s=2 and 10). Role of the spacer's length in the interaction surfactant-polynucleotide. Colloids Surf B Biointerfaces 2014; 118:90-100. [PMID: 24736044 DOI: 10.1016/j.colsurfb.2014.03.040] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2013] [Revised: 02/22/2014] [Accepted: 03/16/2014] [Indexed: 12/27/2022]
Abstract
A multifaceted study on the interaction of calf-thymus DNA with two different cationic gemini surfactants alkanediyl-α-ω-bis(dodecyldimethyl-amonium)bromide, 12-s-12,2Br(-) (with s=2, G2, and 10, G10) was carried out. The measurements were done at different molar ratios X=[surfactant]/[DNA]. Results show two different conformational changes in DNA: a first compaction of the polynucleotide corresponding to a partial conformational (not total) change of DNA from an extended coil state to a globular state that happens at the lower molar ratio X. A second change corresponds to a breaking of the partial condensation, that is, the transition from the compacted state to a new more extended conformation (for the higher X values) different to the initial extension. According to circular dichroism spectra and dynamic light scattering measurements, this new state of DNA seems to be similar to a ψ-phase. Measurements confirm that interactions involved in the compaction are different to those previously obtained for the analog surfactant CTAB. X values at which the conformational changes happen depend on the length of the spacer in the surfactant along with the charge of the polar heads.
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Affiliation(s)
- J P García
- Department of Physical Chemistry, Faculty of Chemistry, University of Seville, c/Prof. García González n° 1, Sevilla 41012, Spain
| | - E Marrón
- Department of Physical Chemistry, Faculty of Chemistry, University of Seville, c/Prof. García González n° 1, Sevilla 41012, Spain
| | - V I Martín
- Department of Physical Chemistry, Faculty of Chemistry, University of Seville, c/Prof. García González n° 1, Sevilla 41012, Spain
| | - M L Moyá
- Department of Physical Chemistry, Faculty of Chemistry, University of Seville, c/Prof. García González n° 1, Sevilla 41012, Spain
| | - P Lopez-Cornejo
- Department of Physical Chemistry, Faculty of Chemistry, University of Seville, c/Prof. García González n° 1, Sevilla 41012, Spain.
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Wu T, Fang B, Chang L, Liu M, Chen F. Sensitive determination of DNA based on the interaction between prulifloxacin-terbium(III) complex and DNA. LUMINESCENCE 2013; 28:894-9. [PMID: 23297144 DOI: 10.1002/bio.2453] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2012] [Revised: 09/15/2012] [Accepted: 10/19/2012] [Indexed: 11/05/2022]
Abstract
A simple spectrofluorimetric method is described for the determination of DNA, based on its enhancement of the fluorescence intensity of prulifloxacin (PUFX)-Tb(3+). The luminescence intensity of the PUFX-Tb(3+) complex increased up to 10-fold after adding DNA. The excitation and emission wavelengths were 345 and 545 nm, respectively. Under optimum conditions, variations in the fluorescence intensity showed a good linear relationship with the concentration of hsDNA in the range of 3.0 × 10(-9) to 1.0 × 10(-6) g/mL, with a correlation coefficient (R) of 0.997, and the detection limit was 2.1 × 10(-9) g/mL. The method was successfully applied to the determination of DNA in synthetic samples, and recoveries were in the range 97.3-102.0%. The mechanism of fluorescence enhancement of the PUFX-Tb(3+) complex by DNA is also discussed. The mechanism may involve formation of a ternary complex mainly by intercalation binding together with weak electrostatic interaction, which will increase the energy transition from ligand to Tb(3+), increasing the rigidity of the complex, and decreasing the radiationless energy loss through O-H vibration of the H2O molecule in the PUFX-Tb(3+) complex. Compared with the previous DNA probes, the proposed method is not only more robust and friendly to the environment, but also of relatively higher sensitivity.
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Affiliation(s)
- Ting Wu
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
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Hosainzadeh A, Gharanfoli M, Saberi M, Chamani J. Probing the interaction of human serum albumin with bilirubin in the presence of aspirin by multi-spectroscopic, molecular modeling and zeta potential techniques: insight on binary and ternary systems. J Biomol Struct Dyn 2012; 29:1013-50. [PMID: 22292958 DOI: 10.1080/073911012010525029] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Here, we report on the effect of aspirin (ASA), on the binding parameters with regard to bilirubin (BR) to human serum albumin (HSA). Two different classes of binding sites were detected. Binding to the first and second classes of the binding sites was dominated by hydrophobic forces in the case of HSA-BR, whereas in the case of the ternary system, binding to the first and second classes of the binding sites was achieved by electrostatic interaction. The binding constant (K(a)) and number of binding site (n) obtained were 1.6 × 10(6)M(-1) and 0.98, respectively, for the primary binding site in the case of HSA-BR, and 3.7 × 10(6)M(-1) and 0.84, respectively, in the presence of ASA (ternary complex) at λ(ex)= 280 nm. The progressive quenching of the protein fluorescence as the BR concentration increased indicated an arrangement of the domain IIA in HSA. Changes in the environment of the aromatic residues were also observed by synchronous fluorescence spectroscopy (SFS). Changes of the secondary structure of HSA involving a decrease of α-helical and β-sheet contents and increased amounts of turns and unordered conformations were mainly found at high concentrations of BR. For the first time, the relationship between the structural parameters of HSA-BR by RLS for determining the critical induced aggregation concentration (C(CIAC)) of BR in the absence and presence of ASA was investigated, and there was a more significant enhancement in the case of the ternary mixture as opposed to the binary one. Changes in the zeta potential of HSA and the HSA-ASA complex in the presence of BR demonstrated a hydrophobic adsorption of this anionic ligand onto the surface of HSA in the binary system as well as both electrostatic and hydrophobic adsorption in the case of the ternary complex. By performing docking experiments, it was found that the acting forces between BR and HSA were mainly hydrophobic > hydrogen bonding > electrostatic interactions, and consequently BR had a long storage time in blood plasma, especially in the presence of ASA. This was due to the electrostatic interaction force between the BR and HSA being stronger in (HSA-ASA) BR than in the HSA-BR complex. In addition, it was demonstrated that, in the presence of ASA, the first binding site of BR on HSA was altered, but the parameters of binding did not become significantly modified, and thus the affinity of BR barely changed with and without ASA.
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Affiliation(s)
- Akram Hosainzadeh
- Department of Biology, Faculty of Sciences, Mashhad Branch, Islamic Azad University, Mashhad, Iran
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Grueso E, Cerrillos C, Hidalgo J, Lopez-Cornejo P. Compaction and decompaction of DNA induced by the cationic surfactant CTAB. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:10968-10979. [PMID: 22755509 DOI: 10.1021/la302373m] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A multifaceted study on the interaction of the cationic surfactant CTAB with calf thymus DNA was carried out by using different techniques. The measurements were done at different molar ratios X = [CTAB]/[DNA]. Results show the conformational change that DNA suffers due to the interaction with surfactant molecules at low molar ratios: the condensation of the polynucleotide, from an extended coil state to a globular state. The effect observed at the higher molar ratios is worth noting: the decondensation of DNA, that is, the transition from a compact state to a more extended conformation. Experimental data obtained confirm that this latter state is not exactly the same as that found in the absence of the surfactant. Attractive interactions between different parts of the molecule by ion correlation effects are the driving force to produce both the compaction and decompaction events. Results also show the importance of choosing both a proper system for the study and the most seeming measuring technique to use. The study demonstrates that, in some cases, the use of several techniques is desirable in obtaining reliable and accurate results.
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Affiliation(s)
- E Grueso
- Department of Physical Chemistry, Faculty of Chemistry, University of Seville, Sevilla, Spain
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Bi S, Wang Y, Pang B, Yan L, Wang T. An investigation on the interaction of DNA with hesperetin/apigenin in the presence of CTAB by resonance Rayleigh light scattering technique and its analytical application. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 90:158-164. [PMID: 22336048 DOI: 10.1016/j.saa.2012.01.037] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2011] [Revised: 12/31/2011] [Accepted: 01/16/2012] [Indexed: 05/31/2023]
Abstract
Two new systems for measuring DNA at nanogram levels by a resonance Rayleigh light scattering (RLS) technique with a common spectrofluorometer were proposed. In the presence of cetyltrimethylammonium bromide (CTAB), the interaction of DNA with hesperetin and apigenin (two effective components of Chinese herbal medicine) could enhance RLS signals with the maximum peak at 363 and 433 nm respectively. The enhanced intensity of RLS was directly proportional to the concentration of DNA in the range of 0.022-4.4 μg mL(-1) for DNA-CTAB-hesperetin system and 0.013-4.4 μg mL(-1) for DNA-CTAB-apigenin system. The detection limit was 2.34 ng mL(-1) and 2.97 ng mL(-1) respectively. Synthetic samples were measured satisfactorily. The recovery of DNA-CTAB-hesperetin system was 97.3-101.9% and that of DNA-CTAB-apigenin system was 101.2-109.5%.
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Affiliation(s)
- Shuyun Bi
- College of Chemistry, Changchun Normal University, Changchun, PR China.
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Bi S, Wang Y, Pang B, Yan L. Study on naringenin-CTMAB-DNA system by resonance light scattering technique and its analytical application. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2011; 79:1430-1434. [PMID: 21616706 DOI: 10.1016/j.saa.2011.04.081] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2011] [Revised: 04/18/2011] [Accepted: 04/29/2011] [Indexed: 05/30/2023]
Abstract
A new high-sensitivity determination method of deoxyribonucleic acid (DNA) with detection limit at nanogram levels was proposed. Based on the measurement of resonance light scattering (RLS), it was found DNA could combine with naringenin and cetyltrimethylammonium bromide (CTMAB) in basic Tris-HCl buffer and produce enhanced RLS signal. The optimum conditions for this system were studied in detail. The enhanced intensity of RLS of naringenin-CTMAB at 353 nm was directly proportional to the concentration of DNA in the range of 0.017-1.7 μg mL(-1). The detection limit was 5.06 ng mL(-1). Using the proposed method, the synthetic samples were analyzed with satisfactory results, the recovery was 99.3-105.0% and RSD was 0.7-3.7%.
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Affiliation(s)
- Shuyun Bi
- College of Chemistry, Changchun Normal University, Changchun 130032, PR China.
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He Y, Yan Q, Song G, Chen J. Spectral study of interaction between poly(L-lysine)-poly(ethylene glycol)-poly(L-lysine) and nucleic acids. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2011; 22:1431-1438. [PMID: 21516339 DOI: 10.1007/s10856-011-4314-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2010] [Accepted: 04/03/2011] [Indexed: 05/30/2023]
Abstract
Polymer-DNA interactions have attracted considerable interests due to their important application in DNA transfection and cellular drug delivery technologies. In this work, a new detection assay for DNA is proposed with a tri-block copolymer poly(L-lysine)-poly(ethylene glycol)-poly(L-lysine) by resonance light scattering technique with the linear ranges from 0.0656 to 6.56 μg ml⁻¹. The detection limit for DNA is 0.42 ng ml⁻¹. Most coexisting substances do not interfere in the detection. UV-spectra and FTIR-spectra were employed to demonstrate the mechanisms of the interaction that the conformation of the DNA changes because the microenvironment of DNA changes.
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Affiliation(s)
- Yu He
- Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Function Molecules, Hubei University, Wuhan 430062, People's Republic of China
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Song G, Peng M, Yan Q. Spectral study of interaction between poly [acrylamide-(2-methyl acryloxyethyl) dimethyl buthylammonium bromide] and nucleic acids. LUMINESCENCE 2011; 26:17-22. [DOI: 10.1002/bio.1179] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2008] [Revised: 06/04/2009] [Accepted: 09/15/2009] [Indexed: 01/16/2023]
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Yu F, Ding Y, Gao Y, Zheng S, Chen F. Fluorescence enhancement effect for the determination of DNA with calcein-cetyl trimethyl ammonium bromide system. Anal Chim Acta 2008; 625:195-200. [PMID: 18724994 DOI: 10.1016/j.aca.2008.07.023] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2008] [Revised: 07/13/2008] [Accepted: 07/14/2008] [Indexed: 10/21/2022]
Abstract
A new spectrofluorimetric method was developed for the determination of trace amounts of DNA using the calcein as a fluorescent probe. In the presence of appropriate amounts of the cationic surfactant cetyl trimethyl ammonium bromide (CTAB), the anionic dye calcein dimerizes. The weak fluorescence intensity of the dimer was enhanced by adding DNA at pH 6-7. The interaction between calcein-CTAB and DNA was studied on the basis of this behavior and a new method was developed for determining DNA. Under the optimal conditions, the enhanced fluorescence intensity was in proportion to the concentration of DNA in the range of 4.0x10(-6) to 8.0x10(-5) g L(-1) for fsDNA and thermally denatured ctDNA (4.5x10(-6) to 9.0x10(-5) g L(-1)). The detection limits (S/N=3) were 2.0x10(-6) and 2.2x10(-6) g L(-1), respectively. This method was used for determining the concentration of DNA in synthetic samples with satisfactory results.
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Affiliation(s)
- Fengshan Yu
- College of Chemistry and Chemical Engineering, Hubei Key Laboratory of Bioinorganic Chemistry & Materia Medica, Huazhong University of Science and Technology, Wuhan 430074, China
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Hu Z, Tong C. Synchronous fluorescence determination of DNA based on the interaction between methylene blue and DNA. Anal Chim Acta 2007; 587:187-93. [PMID: 17386772 DOI: 10.1016/j.aca.2007.01.050] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2006] [Revised: 01/15/2007] [Accepted: 01/19/2007] [Indexed: 11/22/2022]
Abstract
The fluorescence intensity of methylene blue (MB) quenched by DNA in the pH range of 6.5-8.0 was studied with synchronous fluorescence technology. A novel method for detecting single-stranded and double-stranded DNA was developed. The decreased fluorescence intensity at 664 nm is in proportion to the concentration of DNA in the range of 0.28-11.0 micromol L(-1) for ctDNA, 0.14-8.25 micromol L(-1) for thermally denatured ctDNA and 0.28-8.25 micromol L(-1) for hsDNA. The detection limits (S/N=3) are 0.11, 0.04 and 0.04 micromol L(-1), respectively. The method is rapid, selective, and the reagents are lower toxic. It has been used for the determination of DNA in synthetic samples with good satisfaction. In addition, the interaction modes between MB and ctDNA and the mechanism of the fluorescence quenching were also discussed in detail. The experimental results from absorption spectra and fluorescence polarization indicate that the possible interaction modes between MB and DNA are the electrostatic binding and the intercalation binding.
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Affiliation(s)
- Zhou Hu
- Institute of Environmental Science, Zhejiang University, Hangzhou 310029, China
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Zou QC, Yan QJ, Song GW, Zhang SL, Wu LM. Detection of DNA using cationic polyhedral oligomeric silsesquioxane nanoparticles as the probe by resonance light scattering technique. Biosens Bioelectron 2007; 22:1461-5. [PMID: 16884901 DOI: 10.1016/j.bios.2006.06.028] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2006] [Revised: 06/16/2006] [Accepted: 06/26/2006] [Indexed: 11/27/2022]
Abstract
A novel cationic polyhedral oligomeric silsesquioxane nanoparticle (cationic POSS) was synthesized and successfully used as a new probe for the detection of DNA by resonance light scattering technique (RLS). It was found that the electrostatic interaction of cationic POSS and DNA could obviously enhance the RLS signal, the enhanced RLS intensity at 360 nm was proportional to the concentration of nucleic acids within the range of 0.35-42.82 microg ml-1 for calf thymus DNA, the determination limit (3sigma) was 0.32 ng ml-1. The results showed this method was very sensitive, convenient, rapid and reproducible.
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Affiliation(s)
- Qi-Chao Zou
- Faculty of Chemistry and Material Science, Hubei University, Wuhan 430062, PR China
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Huang J, Chen F, He Z. A resonance light scattering method for determination of DNA using Ru(bpy)2PIP(V)2+. Mikrochim Acta 2006. [DOI: 10.1007/s00604-006-0653-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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15
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Determination of Proteins at Nanogram Levels Based on Their Resonance Light Scattering Decrease Effect on the Dibromo-o-Nitrophenylfluorone–Sodium Lauroyl Glutamate System. Mikrochim Acta 2005. [DOI: 10.1007/s00604-005-0425-5] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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16
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Wei Q, Zhang H, Du B, Li Y, Zhang X. Sensitive Determination of DNA by Resonance Light Scattering with Pentamethoxyl Red. Mikrochim Acta 2005. [DOI: 10.1007/s00604-005-0375-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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17
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Liu R, Yang J, Sun C, Wu X, Li L, Su B. Study on the interaction between nucleic acids and cationic surfactants. Colloids Surf B Biointerfaces 2004; 34:59-63. [PMID: 15261091 DOI: 10.1016/j.colsurfb.2003.11.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/05/2003] [Indexed: 11/27/2022]
Abstract
The interactions of nucleic acids and cationic surfactants (cetylpyridine bromide (CPB) and cetyltrimethylammonium bromide (CTMAB)) in aqueous solution have been studied using the techniques of resonance light scattering (RLS) spectroscopy, the absorption spectroscopy, zeta potential assay and NMR assignment measurement. It is considered that CPB or CTMAB can assemble on the surface of nucleic acid via electrostatic and hydrophobic forces, which results in the formation of large associate of nucleic acid-cationic surfactant and RLS enhancement of nucleic acid. Besides these forces, the pi-pi stacking force between CPB and nucleic acid also exists in the associate. In comparison with CTMAB, CPB has larger enhancement on RLS of nucleic acid, which is attributed to that the enhancement of the former is only due to the absorption of the bases of nucleic acid, while the enhancement of the latter is own to the synergetic resonance caused by the absorption of both bases of nucleic acid and the pyridyl in CPB. These results have important implication for understanding the influence of surfactants on nucleic acid functionality in life science.
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Affiliation(s)
- Rutao Liu
- Key Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
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Zhou YL, Li YZ. The interaction of poly(ethylenimine) with nucleic acids and its use in determination of nucleic acids based on light scattering. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2004; 60:377-384. [PMID: 14670501 DOI: 10.1016/s1386-1425(03)00243-9] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
For the first time, poly(ethylenimine) (PEI) was used to determine nucleic acids with a light scattering technique using a common spectrofluorometer. The interaction of PEI with DNA results in greatly enhanced intensity of light scattering at 300 nm, which is caused by the formation of the big particles between DNA and PEI. Based on this, a new quantitative method for nucleic acid determination in aqueous solutions has been developed. Under the optimum conditions, the enhanced intensity of light scattering is proportional to the concentration of nucleic acid in the range of 0.01-10.0 microg ml(-1) for herring sperm DNA (hsDNA), 0.02-10.0 microg ml(-1) for calf thymus DNA (ctDNA), 0.02-20.0 microg ml(-1) for yeast RNA (yRNA). The detection limits are 5.3, 9.9, and 13.7 ng ml(-1), respectively. Synthetic samples were determined satisfactorily. At the same time, the light scattering technique has been successfully used to obtain the information on the effects of pH and ionic strength on the formation and the stability of the DNA/PEI complex, which is important in some fields such as genetic engineering and gene transfer. Using ethidium bromide (EB) as a fluorescent probe, the binding of PEI with hsDNA was studied. Both the binding constant of EB with DNA and the number of binding sites per nucleotide decrease with increasing concentration of PEI, indicating noncompetitive inhibition of EB binding to DNA in the presence of PEI. And the association constant of PEI to DNA obtained is 1.2 x 10(5) M(-1). IR-spectra show that PEI interacts with DNA through both the phosphate groups and the bases of DNA and the formation of DNA/PEI complex may cause the change of the conformation of the DNA secondary structure, which is also proved by UV-spectra.
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Affiliation(s)
- Ying-lin Zhou
- The Key Laboratory of Bioorganic Chemistry and Molecular Engineering, Department of Chemical Biology, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
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19
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Huang CZ, Li YF. Resonance light scattering technique used for biochemical and pharmaceutical analysis. Anal Chim Acta 2003. [DOI: 10.1016/s0003-2670(03)00630-5] [Citation(s) in RCA: 81] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Study of the interaction of nucleic acids with acridine orange-CTMAB and determination of nucleic acids at nanogram levels based on the enhancement of resonance light scattering. Chem Phys Lett 2003. [DOI: 10.1016/s0009-2614(03)00967-9] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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21
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Zhou Y, Li Y. Determination of the Concentration of Nucleic Acids Based on Light Scattering of a Complex Formed with Poly(Allylamine Hydrochloride). ANAL LETT 2003. [DOI: 10.1081/al-120025259] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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22
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Wang Y, Yang J, Wu X, Li L, Sun S, Su B, Zhao Z. Progress of Spectral Probes for Nucleic Acids. ANAL LETT 2003. [DOI: 10.1081/al-120023702] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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23
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Chen F, Huang J, Ai X, He Z. Determination of DNA by Rayleigh light scattering enhancement of molecular “light switches”. Analyst 2003; 128:1462-6. [PMID: 14737233 DOI: 10.1039/b309625d] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Base on the enhancement of Rayleigh light scattering signals of molecular "light switches" by DNA under acidic condition, a sensitive and convenient method for DNA determination was proposed. The experiments indicated that, under optimum conditions, good linear relationships were obtained between the Rayleigh light scattering intensity and the concentration of nucleic acids. The detect limits of calf thymus DNA (ctDNA) were 13.0 ng ml(-1), 4.2 ng ml(-1), 51.5 ng ml(-1) and 3.0 ng ml(-1) with four "light switches", respectively. Plasmid DNA extracted from Bacillus subtilis were determined by the proposed method with satisfactory results, and the recovery rates of calf thymus DNA were in the range of 94.6-110.7%.
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Affiliation(s)
- Fang Chen
- College of Chemistry & Molecular Sciences, Wuhan University, Wuhan 430072, PR China
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Liu R, Yang J, Wu X, Li Z, Sun C, Huang F. RESONANCE RAYLEIGH LIGHT-SCATTERING OF THIAMINE HYDROCHLORIDE–NUCLEIC ACIDS–CETYL TRIMETHYL AMMONIUM BROMIDE SYSTEMS AND THEIR ANALYTICAL APPLICATION. ACTA ACUST UNITED AC 2002. [DOI: 10.1081/tma-120006682] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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25
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Liu R, Yang J, Wu X, Wu T. Resonance double frequency light scattering of the morin–nucleic acid–cetyltrimethylammonium bromide system and its analytical application. Anal Chim Acta 2001. [DOI: 10.1016/s0003-2670(01)01333-2] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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