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Zou L, Li H, Liu M, Zhao W, Wang S. Enhancement Effect of Zn-Arsenazo III Complex for G-quadruplex DNA Stability of Proto-oncogene Promoter Telomeres. LETT DRUG DES DISCOV 2020. [DOI: 10.2174/1570180816666191112154141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:
Controlling the structure of proto-oncogene telomeres is very important in
antitumor therapy. There are relationships between G-quadruplex DNA and the growth of tumor cell.
Methods:
In this study, spectroscopic, cyclic voltammetry and viscosity methods were employed to
investigate the interaction between Zn-Arsenazo Ⅲ complex and G-quadruplex DNA by using 4S
Green Plus Nucleic Acid Stain as a spectral probe in PBS buffer. The binding ratios were n Arsenazo Ⅲ
: n Zn(Ⅱ) = 5:1 for Zn-Arsenazo Ⅲ complex and n Zn- Arsenazo Ⅲ : n G-quadruplex DNA = 8:1 for Zn-Arsenazo
Ⅲ-G-quadruplex DNA. The bonding constants (Kθ
298.15K=4.44x105 L·mol-1, Kθ
308.15K= 1.00x105
L·mol-1, Kθ
318.15K= 1.04x106 L·mol-1) were obtained by double reciprocal method at different temperatures, Which was found that the interaction between Zn-Arsenazo Ⅲ complex and Gquadruplex
DNA was driven by enthalpy. Furthermore, the research further confirmed that the interaction
mode between Zn-Arsenazo Ⅲ complex and G-quadruplex DNA was a mixed binding
which involved intercalation and non-intercalation interaction.
Results and Conclusion:
Together these findings also have corroborated the application of stabilizing
ligands and intervening with their function for target G-quadruplexes in a cellular context.
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Affiliation(s)
- Liyuan Zou
- Key Laboratory of Functional Small Organic Molecule, Ministry of Education, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China
| | - Hongbo Li
- Key Laboratory of Functional Small Organic Molecule, Ministry of Education, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China
| | - Mingbin Liu
- Key Laboratory of Functional Small Organic Molecule, Ministry of Education, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China
| | - Weihua Zhao
- Key Laboratory of Functional Small Organic Molecule, Ministry of Education, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China
| | - Suqin Wang
- Key Laboratory of Functional Small Organic Molecule, Ministry of Education, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China
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Abstract
To assess the potential cytostatic properties of the thulium(III)-arsenazo III complex as a probe of rare earth complex antitumor drugs, the interaction information of the thulium(III)-arsenazo III complex with DNA was obtained by using spectroscopy, viscosity measurements, and voltammetric methods. The thermodynamic functions demonstrated that the binding constants of the thulium(III)-arsenazo III complex with DNA were Kθ298.15K = 4.84 × 106 L·mol−1 and Kθ308.15K = 4.48 × 106 L·mol−1, and the binding process was enthalpy driven. The increase in relative viscosity of DNA with the addition of the thulium(III)-arsenazo III complex and the results from Scatchard and voltammetric methods showed that the interaction mode between the thulium(III)-arsenazo III complex and DNA was groove binding along with weak intercalative binding.
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Moghadam NH, Salehzadeh S, Shahabadi N. Spectroscopic and molecular docking studies on the interaction of antiviral drug nevirapine with calf thymus DNA. NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2017; 36:553-570. [PMID: 28786740 DOI: 10.1080/15257770.2017.1346800] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
The interaction of calf thymus DNA with nevirapine at physiological pH was studied by using absorption, circular dichroism, viscosity, differential pulse voltammetry, fluorescence techniques, salt effect studies and computational methods. The drug binds to ct-DNA in a groove binding mode, as shown by slight variation in the viscosity of ct-DNA. Furthermore, competitive fluorimetric studies with Hoechst 33258 indicate that nevirapine binds to DNA via groove binding. Moreover, the structure of nevirapine was optimized by DFT calculations and was used for the molecular docking calculations. The molecular docking results suggested that nevirapine prefers to bind on the minor groove of ct-DNA.
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Affiliation(s)
| | | | - Nahid Shahabadi
- b Department of Chemistry, Faculty of Science , Razi University , Kermanshah , Iran.,c Medical Biology Research Center (MBRC) Kermanshah University of Medical Sciences , Kermanshah , Iran
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Feng L, Xu L, Dong S, Hao J. Thermo-reversible capture and release of DNA by zwitterionic surfactants. SOFT MATTER 2016; 12:7495-7504. [PMID: 27539945 DOI: 10.1039/c6sm00704j] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The thermo-reversible capture and release of DNA were studied by the protonation and deprotonation of alkyldimethylamine oxide (CnDMAO, n = 10, 12 and 14) in Tris-HCl buffer solution. DNA/C14DMAO in Tris-HCl buffer solution with pH = 7.2 is transparent at 25 °C, indicating that DNA molecules exist mainly in individuals and the binding of C14DMAO is weak. With the increase of temperature, the pH of the buffer solution continuously decreases, which leads to protonation of C14DMAO (C14DMAO + H(+)→ C14DMAOH(+)) and an obvious increase of the turbidity of the samples. This indicates a stronger binding of the protonated C14DMAOH(+) to DNA. Further investigations demonstrated the formation of DNA/C14DMAOH(+) complexes, in which the stretched DNA molecules are effectively compacted as evidenced from UV-vis absorptions, circular dichroism (CD) measurements, atomic force microscopy (AFM) observations, dynamic light scattering (DLS) measurements and agarose gel electrophoresis (AGE). Interestingly, when the temperature is turned back to 25 °C, the compacted DNA molecules can fully recover to the stretched conformation. This cycle can be repeated several times without obvious loss of efficiency. The effect of the chain length of CnDMAO has also been investigated. When C14DMAO was replaced by C12DMAO, similar phenomena can be observed with a slightly higher critical surfactant concentration for DNA compaction and a slightly lower pH of Tris-HCl buffer solution with pH = 6.8. For the DNA/C10DMAO system, however, no DNA compaction was observed even in Tris-HCl buffer solution with a much lower pH and a much higher C10DMAO concentration. The negative charges of DNA molecules can easily be neutralized by positive charges of cationic CnDMAOH(+) (n = 12 and 14) micelles. DNA was compacted and then insoluble DNA/CnDMAOH(+) complexes were formed. Because of the much higher critical micelle concentration (cmc) of the shorter chain length C10DMAOH(+), cationic C10DMAOH(+) micelles cannot form under the studied condition to compact DNA. The strategy may provide an efficient and alternative approach for stimuli-responsive gene therapy and drug release.
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Affiliation(s)
- Lei Feng
- Key Laboratory of Colloid and Interface Chemistry & Key Laboratory of Special Aggregated Materials, Shandong University, Ministry of Education, Jinan 250100, China.
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TRISARANAKUL W, CHOMPOOSOR A, MANEEPRAKORN W, NACAPRICHA D, CHOENGCHAN N, TEERASONG S. A Simple and Rapid Method Based on Anti-aggregation of Silver Nanoparticles for Detection of Poly(diallyldimethylammonium chloride) in Tap Water. ANAL SCI 2016; 32:769-73. [DOI: 10.2116/analsci.32.769] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Wichaya TRISARANAKUL
- Department of Chemistry and Applied Analytical Chemistry Research Unit, Faculty of Science, King Mongkut’s Institute of Technology Ladkrabang
| | - Apiwat CHOMPOOSOR
- Department of Chemistry, Faculty of Science, Ramkhamhaeng University
| | - Weerakanya MANEEPRAKORN
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA)
| | - Duangjai NACAPRICHA
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University
| | - Nathawut CHOENGCHAN
- Department of Chemistry and Applied Analytical Chemistry Research Unit, Faculty of Science, King Mongkut’s Institute of Technology Ladkrabang
| | - Saowapak TEERASONG
- Department of Chemistry and Applied Analytical Chemistry Research Unit, Faculty of Science, King Mongkut’s Institute of Technology Ladkrabang
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Xiong X, Huang J, Wang X. DNA binding studies of hematoxylin-Dy(ш) complex by spectrometry using acridine orange as a probe. NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2015; 33:730-45. [PMID: 25295749 DOI: 10.1080/15257770.2014.931589] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The interaction of a hematoxylin(HE)-Dy(Ш) complex with herring sperm DNA(hsDNA) was studied using acridine orange(AO) as a probe by UV-vis absorption, circular dichroism(CD), fluorescence spectroscopy and viscosity measurements. From the results of the probe experiment, we found that the HE-Dy(Ш) complex could compete with AO for intercalating into hsDNA. The binding constants of the HE-Dy(Ш) complex to hsDNA was obtained by the double reciprocal method and indicated that the affinity between hsDNA and the complex is weaker than that between hsDNA and classical intercalators. The thermodynamic parameters(ΔH°, ΔG°, ΔS°) were calculated from the UV-vis absorption data measured at two different temperatures. Further experimental results suggested that there exist groove binding and partial intercalation binding between hsDNA and HE-Dy(Ш) complex.
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Affiliation(s)
- Xiaoli Xiong
- a College of Chemistry and Materials Science , Sichuan Normal University , Chengdu , P.R.China
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7
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Xiong XL, Zhao N, Wang XM. Interaction between tryptophan-Sm(III) complex and DNA with the use of a acridine orange dye fluorophor probe. LUMINESCENCE 2015; 31:210-6. [PMID: 26016416 DOI: 10.1002/bio.2947] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2014] [Revised: 03/12/2015] [Accepted: 04/24/2015] [Indexed: 12/28/2022]
Abstract
The interaction of the Trp-Sm(III) complex with herring sperm DNA (hs-DNA) was investigated with the use of acridine orange (AO) dye as a spectral probe for UV-vis spectrophotometry and fluorescence spectroscopy. The results showed that the both the Trp-Sm(III) complex and the AO molecule could intercalate into the double helix of the DNA. The Sm(III)-(Trp)3 complex was stabilized by intercalation into the DNA with binding constants: K(Ө)25°C = 7.14 × 10(5) L·mol(-1) and K(Ө) 37°C = 5.28 × 10(4) L·mol(-1), and it could displace the AO dye from the AO-DNA complex in a competitive reaction. Computation of the thermodynamic functions demonstrates that Δr Hm (Ө) is the primary driving power of the interaction between the Sm(III)(Trp)3 complex and the DNA. The results from Scatchard and viscometry methods suggested that the interaction mode between the Sm(III)(Trp)3 complex and the hs-DNA is groove binding and weak intercalation binding.
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Affiliation(s)
- Xiao Li Xiong
- College of Chemistry and Materials Science, Sichuan Normal University, Chengdu, 610066, People's Republic of China
| | - Na Zhao
- Beijing City University Academic Affairs Office, Beijing, 100083, People's Republic of China
| | - Xing Ming Wang
- Department of Chemistry, School Materials Science and Engineering, Southwest University of Science and Technology, Sichuan, Mianyang, 621010, People's Republic of China
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8
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Synthesis, spectral investigation and development of tetrahedral copper(II) complexes as artificial metallonucleases and antimalarial agents. Appl Organomet Chem 2015. [DOI: 10.1002/aoc.3299] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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9
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Shahabadi N, Bagheri S. Spectroscopic and molecular docking studies on the interaction of the drug olanzapine with calf thymus DNA. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 136 Pt C:1454-1459. [PMID: 25459706 DOI: 10.1016/j.saa.2014.10.036] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2014] [Revised: 07/22/2014] [Accepted: 10/13/2014] [Indexed: 06/04/2023]
Abstract
The present study investigated the binding interaction between olanzapine and calf thymus DNA (ct-DNA) using emission, absorption, circular dichroism, viscosity measurements and molecular modeling. Thermodynamic parameters (ΔH<0 and ΔS<0) indicated that hydrogen bond and van der Waals play main roles in the binding of the drug to ct-DNA. Spectrophotometric studies of the interaction of olanzapine with DNA have shown that it could bind to ct-DNA (Kb=2×10(3)M(-1)). The binding constant is comparable to standard groove binding drugs. Competitive fluorimetric studies with Hoechst 33258 have shown that olanzapine exhibits the ability to displace the DNA-bound Hoechst 33258 indicating that binds strongly in minor groove of DNA helix. Furthermore, the drug induces detectable changes in the CD spectrum of ct-DNA as well as changes in its viscosity. All of the experimental results prove that the groove binding must be predominant. The results obtained from experimental data were in good agreement with molecular modeling studies.
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Affiliation(s)
- Nahid Shahabadi
- Department of Chemistry, Faculty of Science, Razi University, Kermanshah, Iran.
| | - Somayeh Bagheri
- Department of Chemistry, Faculty of Science, Razi University, Kermanshah, Iran
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Gan N, Zhang J, Lin S, Long N, Li T, Cao Y. A Novel Magnetic Graphene Oxide Composite Absorbent for Removing Trace Residues of Polybrominated Diphenyl Ethers in Water. MATERIALS 2014; 7:6028-6044. [PMID: 28788175 PMCID: PMC5456175 DOI: 10.3390/ma7086028] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/08/2014] [Revised: 05/29/2014] [Accepted: 08/08/2014] [Indexed: 11/30/2022]
Abstract
The purpose of the study was to develop a facile method for the fabrication of a stable and reusable magnetic graphene composite absorbent to remove trace levels of polybrominated diphenyl ethers in water treatment. The poly cationic Fe3O4@PDDA (poly(diallyldimethyl ammonium chloride) (PDDA)) core-shell structured nanoparticles were first synthesized, and then, DNA was laid on the surface of graphene oxide (GOx) to prepare the polyanionic GOx@DNA composite. The above materials were then mixed together and adhered together through sol-gel technology. Thus, the Fe3O4@PDDA/GOx@DNA composite absorbent was prepared. Its performance was tested by disperse solid phase extraction and gas chromatography/mass spectrometric (GC/MS) for removing six kinds of indicative polybrominated diphenyl ethers (BDEs) in water samples. The removal percentages of several real samples for six kinds of BDEs (BDE17, BDE28, BDE 71, BDE 47, BDE 66, BDE 100) at the ng/mL order of magnitude were in the range of 88.2%–99.1%. The removal percentage still reached 80.0% when the adsorbent was reused at least 20 times. The results suggested that the magnetic absorbent can obviously remove trace levels of BDEs from large volumes of aqueous solutions in environmental pollution cleanup with high removal efficiency.
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Affiliation(s)
- Ning Gan
- The State Key Laboratory Base of Novel Functional Materials and Preparation Science, Faculty of Material Science and Chemical Engineering of Ningbo University, Ningbo 315211, Zhejiang, China.
| | - Jiabing Zhang
- The State Key Laboratory Base of Novel Functional Materials and Preparation Science, Faculty of Material Science and Chemical Engineering of Ningbo University, Ningbo 315211, Zhejiang, China.
| | - Shaichai Lin
- The State Key Laboratory Base of Novel Functional Materials and Preparation Science, Faculty of Material Science and Chemical Engineering of Ningbo University, Ningbo 315211, Zhejiang, China.
| | - Nengbing Long
- The State Key Laboratory Base of Novel Functional Materials and Preparation Science, Faculty of Material Science and Chemical Engineering of Ningbo University, Ningbo 315211, Zhejiang, China.
| | - Tianhua Li
- The State Key Laboratory Base of Novel Functional Materials and Preparation Science, Faculty of Material Science and Chemical Engineering of Ningbo University, Ningbo 315211, Zhejiang, China.
| | - Yuting Cao
- The State Key Laboratory Base of Novel Functional Materials and Preparation Science, Faculty of Material Science and Chemical Engineering of Ningbo University, Ningbo 315211, Zhejiang, China.
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11
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Tsiaggali M, Andreadou E, Hatzidimitriou A, Pantazaki A, Aslanidis P. Copper(I) halide complexes of N-methylbenzothiazole-2-thione: Synthesis, structure, luminescence, antibacterial activity and interaction with DNA. J Inorg Biochem 2013; 121:121-8. [DOI: 10.1016/j.jinorgbio.2013.01.001] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2012] [Revised: 12/31/2012] [Accepted: 01/01/2013] [Indexed: 10/27/2022]
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12
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Yang H, Wang XM. Spectroscopic studies on the interaction of β-cyclodextrin-8-Hydroxyquiuoline inclusion complex with herring sperm DNA. J Mol Struct 2013. [DOI: 10.1016/j.molstruc.2012.09.044] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Zeng S, Cao Y, Sang W, Li T, Gan N, Zheng L. Enrichment of polychlorinated biphenyls from aqueous solutions using Fe₃O₄ grafted multiwalled carbon nanotubes with poly dimethyl diallyl ammonium chloride. Int J Mol Sci 2012; 13:6382-6398. [PMID: 22754371 PMCID: PMC3382794 DOI: 10.3390/ijms13056382] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2012] [Revised: 05/16/2012] [Accepted: 05/17/2012] [Indexed: 11/16/2022] Open
Abstract
In this paper, Fe(3)O(4) nanoparticles (Fe(3)O(4) NPs) grafted carboxyl groups of multiwalled carbon nanotubes with cationic polyelectrolyte poly (dimethyldiallylammonium chloride) (PDDA) (MWCNTs-COO(-)/PDDA@Fe(3)O(4)), are successfully synthesized and used for the extraction of six kinds of major toxic polychorinated biphenyls (PCBs) from a large volume of water solution. The hydrophilicity of the PDDA cage can enhance the dispersibility of sorbents in water samples, and the superparamagnetism of the Fe(3)O(4) NPs facilitate magnetic separation which directly led to the simplification of the extraction procedure. With the magnetic solid-phase extraction (MSPE) technique based on the MWCNTs-COO(-)/PDDA@Fe(3)O(4) sorbents, it requires only 30 min to extract trace levels of PCBs from 500 mL water samples. When the eluate condensed to 1.0 mL, concentration factors for PCBs became over 500. The spiked recoveries of several real water samples for PCBs were in the range of 73.3-98.9% with relative standard deviations varying from 3.8% to 9.4%, reflecting good accuracy of the method. Therefore, preconcentration of trace level of PCBs by using this MWCNTs-COO(-)/PDDA@Fe(3)O(4) sorbent, which are stable for multiple reuses, from water solution can be performed.
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Affiliation(s)
- Shaolin Zeng
- The State Key Laboratory Base of Novel Functional Materials and Preparation Science, Faculty of Material Science and Chemical Engineering, Ningbo University, Ningbo 315211, China; E-Mails: (S.Z.); (Y.C.); (W.S.); (T.L.)
| | - Yuting Cao
- The State Key Laboratory Base of Novel Functional Materials and Preparation Science, Faculty of Material Science and Chemical Engineering, Ningbo University, Ningbo 315211, China; E-Mails: (S.Z.); (Y.C.); (W.S.); (T.L.)
| | - Weiguo Sang
- The State Key Laboratory Base of Novel Functional Materials and Preparation Science, Faculty of Material Science and Chemical Engineering, Ningbo University, Ningbo 315211, China; E-Mails: (S.Z.); (Y.C.); (W.S.); (T.L.)
| | - Tianhua Li
- The State Key Laboratory Base of Novel Functional Materials and Preparation Science, Faculty of Material Science and Chemical Engineering, Ningbo University, Ningbo 315211, China; E-Mails: (S.Z.); (Y.C.); (W.S.); (T.L.)
| | - Ning Gan
- The State Key Laboratory Base of Novel Functional Materials and Preparation Science, Faculty of Material Science and Chemical Engineering, Ningbo University, Ningbo 315211, China; E-Mails: (S.Z.); (Y.C.); (W.S.); (T.L.)
- Authors to whom correspondence should be addressed; E-Mails: (N.G.); (L.Z.); Tel.: +86-574-87609933 (N.G.); +86-20-61642147 (L.Z.); Fax: +86-574-87600734 (N.G.); +86-20-61642147 (L.Z.)
| | - Lei Zheng
- Clinical Laboratory Center, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
- Authors to whom correspondence should be addressed; E-Mails: (N.G.); (L.Z.); Tel.: +86-574-87609933 (N.G.); +86-20-61642147 (L.Z.); Fax: +86-574-87600734 (N.G.); +86-20-61642147 (L.Z.)
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Chai J, Wang J, Xu Q, Hao F, Liu R. Multi-spectroscopic methods combined with molecular modeling dissect the interaction mechanisms of ractopamine and calf thymus DNA. MOLECULAR BIOSYSTEMS 2012; 8:1902-7. [PMID: 22610465 DOI: 10.1039/c2mb25095k] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The toxic interaction of ractopamine (RAC) with calf thymus DNA (ct DNA) was studied in vitro using multi-spectroscopic methods and molecular modeling methods. The hypochromic effect without a noticeable shift in UV-vis absorption indicated that the minor groove binding mode existed in the interaction between RAC and DNA. The fluorescence quenching of RAC was observed with the increasing addition of DNA and was proved to be the static quenching. The binding constant and the binding site sizes were 4.13 × 10(3) and 0.97, respectively. The thermodynamic calculation demonstrated that the hydrogen bond and van der Waals were main acting forces. This result further confirmed the existence of groove binding mode. Afterwards, we found another interaction mode, electrostatic binding mode through the fluorescence polarization, ionic effects and denatured DNA experiments. Circular dichroism spectroscopy (CD) was then employed to monitor the conformation changes of DNA. Molecular modeling studies illustrated the visual display of the binding mode and the detailed information of the H-bond.
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Affiliation(s)
- Jun Chai
- Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, China-America CRC for Environment & Health, Shandong Province, Shandong University, 27# Shanda South Road, Jinan 250100, P.R.China
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15
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Ahmadi F, Jamali N, Moradian R, Astinchap B. Binding Studies of Pyriproxyfen to DNA by Multispectroscopic Atomic Force Microscopy and Molecular Modeling Methods. DNA Cell Biol 2012; 31:259-68. [DOI: 10.1089/dna.2011.1303] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Farhad Ahmadi
- Department of Medicinal Chemistry, Faculty of Pharmacy, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Nasibeh Jamali
- Department of Medicinal Chemistry, Faculty of Pharmacy, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Rostam Moradian
- Department of Physics, Faculty of Science, Razi University, Kermanshah, Iran
- Nano Technology Research Laboratory, Razi University, Kermanshah, Iran
| | - Bandar Astinchap
- Department of Physics, Faculty of Science, Razi University, Kermanshah, Iran
- Nano Technology Research Laboratory, Razi University, Kermanshah, Iran
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16
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Eguílaz M, Villalonga R, Agüí L, Yáñez-Sedeño P, Pingarrón J. Gold nanoparticles: Poly(diallyldimethylammonium chloride)–carbon nanotubes composites as platforms for the preparation of electrochemical enzyme biosensors: Application to the determination of cholesterol. J Electroanal Chem (Lausanne) 2011. [DOI: 10.1016/j.jelechem.2011.07.040] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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17
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Eguílaz M, Villalonga R, Yáñez-Sedeño P, Pingarrón JM. Designing Electrochemical Interfaces with Functionalized Magnetic Nanoparticles and Wrapped Carbon Nanotubes as Platforms for the Construction of High-Performance Bienzyme Biosensors. Anal Chem 2011; 83:7807-14. [DOI: 10.1021/ac201466m] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Marcos Eguílaz
- Department of Analytical Chemistry, Faculty of Chemistry, University Complutense of Madrid, 28040 Madrid, Spain
| | - Reynaldo Villalonga
- Department of Analytical Chemistry, Faculty of Chemistry, University Complutense of Madrid, 28040 Madrid, Spain
| | - Paloma Yáñez-Sedeño
- Department of Analytical Chemistry, Faculty of Chemistry, University Complutense of Madrid, 28040 Madrid, Spain
| | - José M. Pingarrón
- Department of Analytical Chemistry, Faculty of Chemistry, University Complutense of Madrid, 28040 Madrid, Spain
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A three-dimensional, magnetic and electroactive nanoprobe for amperometric determination of tumor biomarkers. Int J Mol Sci 2011; 12:362-75. [PMID: 21339991 PMCID: PMC3039957 DOI: 10.3390/ijms12010362] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2010] [Revised: 12/30/2010] [Accepted: 01/07/2011] [Indexed: 11/17/2022] Open
Abstract
A novel electrochemical immunosensor for tumor biomarker detection based on three-dimensional, magnetic and electroactive nanoprobes was developed in this study. To fabricate the nanoprobes, negatively charged Fe(3)O(4) nanoparticles (Fe(3)O(4) NPs) and gold nanoparticles (Au NPs) were first loaded on the surface of multiple wall carbon nanotubes (MCNTs) which were functioned with redox-active hemin and cationic polyelectrolyte poly(dimethyldiallylammonium chloride) (PDDA). Using alpha fetoprotein (AFP) as a model analyte, AFP antibody (anti-AFP) was absorbed on the surface of Au NPs, bovine serum albumin (BSA) was then used to block sites against non-specific binding, and finally formed anti-AFP/Au NPs/Fe(3)O(4)/hemin/MCNTs named anti-AFP nanoprobes. When the target antigen AFP was present, it interacted with anti-AFP and formed an antigen-antibody complex on the nanoprobe interface. This resulted in a decreased electrochemical signal of hemin for quantitative determination of AFP when immobilized onto the screen-printed working electrode (SPCE). The results showed that the nanoprobe-based electrochemical immunosensor was sensitive to AFP detection at a concentration of 0.1 to 200 ng·mL(-1) with a detection limit of 0.04 ng·mL(-1), it also demonstrated good selectivity against other interferential substances. The electroactive nanoprobes can be massively prepared, easily immobilized on the SPCE for target detection and rapidly renewed with a magnet. The proposed immunosensor is fast, simple, sensitive, stable, magnet-controlled, nontoxic, label-free and reproducible.
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Study on a luminol-based electrochemiluminescent sensor for label-free DNA sensing. SENSORS 2010; 10:9481-92. [PMID: 22163421 PMCID: PMC3230976 DOI: 10.3390/s101009481] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/18/2010] [Revised: 09/25/2010] [Accepted: 10/08/2010] [Indexed: 11/17/2022]
Abstract
Automatic, inexpensive, simple and sensitive methods for DNA sensing and quantification are highly desirable for biomedical research. The rapid development of both the fundamentals and applications of electrochemiluminescence (ECL) over the past years has demonstrated its potential for analytical and bio-analytical chemistry. This paper reports the quenching effect of DNA on the ECL of luminol and the further development of a DNA sensing device. With the pre-functionalization by a composite of carbon nano-tubes (CNTs) and Au nanoparticles (AuNPs), the sensor provides a novel and valuable label-free approach for DNA sensing. Here the ECL intensity was remarkably decreased when more than 1.0 × 10−12 molar of DNA were adsorbed on the sensor. Linearity of the DNA amount with the reciprocal of ECL intensity was observed. A saturated sensor caused a 92.8% quenching effect. The research also proposes the mechanism for the quenching effect which could be attributed to the interaction between luminol and DNA and the elimination of reactive oxygen species (ROSs) by DNA.
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Ran XQ, Yuan R, Chai YQ, Hong CL, Qian XQ. A sensitive amperometric immunosensor for alpha-fetoprotein based on carbon nanotube/DNA/Thi/nano-Au modified glassy carbon electrode. Colloids Surf B Biointerfaces 2010; 79:421-6. [PMID: 20627666 DOI: 10.1016/j.colsurfb.2010.05.012] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2010] [Revised: 04/25/2010] [Accepted: 05/02/2010] [Indexed: 11/26/2022]
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21
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Tong C, Xiang G, Bai Y. Interaction of paraquat with calf thymus DNA: a terbium(III) luminescent probe and multispectral study. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2010; 58:5257-5262. [PMID: 20402507 DOI: 10.1021/jf1000748] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Terbium(III), as a good luminescent probe, was developed for the study of the interaction between paraquat and calf thymus DNA (ctDNA) when the binding mode of small molecules to DNA was electrostatic binding. This interaction was further investigated using an ethidium bromide (EB) probe, UV absorption spectra, and circular dichroism spectra. On the basis of Scatchard plots constructed from fluorescence titration data of the ctDNA-Tb(3+) system in the presence of paraquat, the binding constants between paraquat and ctDNA were obtained. The results showed that the electrostatic attraction between positively charged sodium ion and negatively charged phosphate groups could inhibit the binding of paraquat to ctDNA, and competitive inhibition between Tb(3+) and paraquat also existed when they were bound to ctDNA. The effects of paraquat on the fluorescence intensity of the EB-ctDNA system indicated that the intercalation binding of paraquat to ctDNA could be excluded. This conclusion could be further supported by both the absorption spectra of paraquat in the presence of ctDNA and the CD spectra of the paraquat-ctDNA system.
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Affiliation(s)
- Changlun Tong
- Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, China.
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Sun Y, Liu R, Chi Z, Qin P, Fang X, Mou Y. Spectroscopic investigation on the toxic interaction of melamine with herring sperm DNA. J Biochem Mol Toxicol 2010; 24:323-9. [DOI: 10.1002/jbt.20341] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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23
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Kalanur SS, Katrahalli U, Seetharamappa J. Electrochemical studies and spectroscopic investigations on the interaction of an anticancer drug with DNA and their analytical applications. J Electroanal Chem (Lausanne) 2009. [DOI: 10.1016/j.jelechem.2009.09.018] [Citation(s) in RCA: 129] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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24
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Interaction of DNA with Cationic Gemini Surfactant Trimethylene-1,3-bis (dodecyldimethyl-ammonium bromide) and Anionic Surfactant SDS Mixed System. Chin J Chem Eng 2008. [DOI: 10.1016/s1004-9541(09)60017-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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25
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Binding Properties of Water-Soluble Carbosilane Dendrimers. J Fluoresc 2008; 19:267-75. [DOI: 10.1007/s10895-008-0412-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2008] [Accepted: 08/11/2008] [Indexed: 01/25/2023]
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26
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Synthesis, structure and interactions with DNA of novel tetranuclear, [Mn4(II/II/II/IV)] mixed valence complexes. J Inorg Biochem 2008; 102:618-28. [DOI: 10.1016/j.jinorgbio.2007.10.005] [Citation(s) in RCA: 197] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2007] [Revised: 10/12/2007] [Accepted: 10/16/2007] [Indexed: 11/23/2022]
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27
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Chen J, Zhang J, Zhuang Q, Chen J, Lin X. Electrochemical Studies of the Interaction of 2-Nitroacridone with DNA and Determination of DNA. ELECTROANAL 2007. [DOI: 10.1002/elan.200703929] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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28
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Adsorption of the oligonucleotides A10, A25, A50 and A80 at the mercury/electrolyte interface. Colloids Surf A Physicochem Eng Asp 2007. [DOI: 10.1016/j.colsurfa.2006.08.050] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Yu B, Cong HL, Liu HW, Lu CH, Wei F, Cao WX. Fabrication and characterization of stable ultrathin film micropatterns containing DNA and photosensitive polymer diazoresin. Anal Bioanal Chem 2005; 384:385-90. [PMID: 16362289 DOI: 10.1007/s00216-005-0229-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2005] [Revised: 11/05/2005] [Accepted: 11/10/2005] [Indexed: 10/25/2022]
Abstract
Stable, ultrathin DNA micropatterns were fabricated from photosensitive polymer diazoresin (DR) through a self-assembly technique. The micropatterns were achieved on LBL ultrathin film after UV exposure through a photomask. The patterns were characterized systematically with scanning electron microscopy, atomic force microscopy, X-ray photoelectron spectroscopy and fluorescence microscopy. All of the results indicate that the combined LBL self-assembly and photolithography technique is a promising method for constructing stable, well-defined micropatterns with a nanoscale thickness.
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Affiliation(s)
- Bing Yu
- The Key Lab of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, People's Republic of China
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30
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Ye BX, Yuan LJ, Chen C, Tao JC. Electrochemical and Spectroscopic Study of the Interaction of Indirubin with DNA. ELECTROANAL 2005. [DOI: 10.1002/elan.200403250] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Rosa M, Dias R, da Graça Miguel M, Lindman B. DNA−Cationic Surfactant Interactions Are Different for Double- and Single-Stranded DNA. Biomacromolecules 2005; 6:2164-71. [PMID: 16004459 DOI: 10.1021/bm050137n] [Citation(s) in RCA: 104] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The stability of DNA in solution and the phase behavior in mixtures with dodecyltrimethylammonium bromide (DTAB) were investigated. By means of circular dichroism, UV absorption, and differential scanning calorimetry, we found that for dilute solutions of DNA with no addition of salt the DNA molecules are in the single-stranded conformation, whereas the addition of a small amount of NaBr, 1 mM, is sufficient to stabilize the DNA double-helix. Furthermore, at higher DNA concentrations, native DNA becomes the most stable structure, which is due to a self-screening effect. By phase diagram determinations of the DNA-surfactant system, we found that the effect of salt on phase behavior mainly relates to a difference in interaction of the amphiphile between single-stranded DNA (ssDNA) and double-stranded DNA (dsDNA). The difference in association between ss and dsDNA with surfactants of different chain lengths can be interpreted in terms of an interplay between hydrophobic and electrostatic interactions, the latter being influenced by polymer flexibility. In this way, a nonmonotonic variation can be rationalized. A crossing of the phase separation lines with DNA concentration can be rationalized in terms of a change in relative stability of ss and dsDNA. The fact that ssDNA phase separates earlier than dsDNA in association with DTAB, may serve as a basis for a method of easily separating dsDNA from ssDNA by the addition of surfactant; this is verified as monitored by circular dichroism measurements.
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Affiliation(s)
- Mónica Rosa
- Chemistry Department, Coimbra University, 3004-535 Coimbra, Portugal
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