51
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Zhao L, Zhou PW, Zhao GJ. Non-adiabatic dynamics simulation exploration of the wavelength-dependent photoinduced relaxation mechanism of trans-N-1-methyl-2-(tolylazo) imidazole in the gas phase. RSC Adv 2016. [DOI: 10.1039/c6ra11416d] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
A comprehensive picture of the photoinduced non-adiabatic relaxation dynamics of trans-N-1-methyl-2-(tolylazo) imidazole (trans-MTAI) in different electronic excited states has been revealed using the on-the-fly surface hopping method at the ab initio CASSCF level.
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Affiliation(s)
- Li Zhao
- State Key Laboratory of Molecular Reaction Dynamics
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- China
| | - Pan-Wang Zhou
- State Key Laboratory of Molecular Reaction Dynamics
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- China
| | - Guang-Jiu Zhao
- State Key Laboratory of Molecular Reaction Dynamics
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian 116023
- China
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52
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Xu L, Wang Y, Wei G, Feng L, Dong S, Hao J. Ordered DNA-Surfactant Hybrid Nanospheres Triggered by Magnetic Cationic Surfactants for Photon- and Magneto-Manipulated Drug Delivery and Release. Biomacromolecules 2015; 16:4004-12. [DOI: 10.1021/acs.biomac.5b01372] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Lu Xu
- Key Laboratory of Colloid and Interface Chemistry & Key Laboratory of Special Aggregated Materials, Shandong University, Ministry of Education, Jinan 250100, China
| | - Yitong Wang
- Key Laboratory of Colloid and Interface Chemistry & Key Laboratory of Special Aggregated Materials, Shandong University, Ministry of Education, Jinan 250100, China
| | - Guangcheng Wei
- Key Laboratory of Colloid and Interface Chemistry & Key Laboratory of Special Aggregated Materials, Shandong University, Ministry of Education, Jinan 250100, China
| | - Lei Feng
- Key Laboratory of Colloid and Interface Chemistry & Key Laboratory of Special Aggregated Materials, Shandong University, Ministry of Education, Jinan 250100, China
| | - Shuli Dong
- Key Laboratory of Colloid and Interface Chemistry & Key Laboratory of Special Aggregated Materials, Shandong University, Ministry of Education, Jinan 250100, China
| | - Jingcheng Hao
- 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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53
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Zakrevskyy Y, Titov E, Lomadze N, Santer S. Phase diagrams of DNA-photosensitive surfactant complexes: effect of ionic strength and surfactant structure. J Chem Phys 2015; 141:164904. [PMID: 25362338 DOI: 10.1063/1.4899281] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Realization of all-optically controlled and efficient DNA compaction is the major motivation in the study of interactions between DNA and photosensitive surfactants. In this article, using recently published approach of phase diagram construction [Y. Zakrevskyy, P. Cywinski, M. Cywinska, J. Paasche, N. Lomadze, O. Reich, H.-G. Löhmannsroben, and S. Santer, J. Chem. Phys. 140, 044907 (2014)], a strategy for substantial reduction of compaction agent concentration and simultaneous maintaining the light-induced decompaction efficiency is proposed. The role of ionic strength (NaCl concentration), as a very important environmental parameter, and surfactant structure (spacer length) on the changes of positions of phase transitions is investigated. Increase of ionic strength leads to increase of the surfactant concentration needed to compact DNA molecule. However, elongation of the spacer results to substantial reduction of this concentration. DNA compaction by surfactants with longer tails starts to take place in diluted solutions at charge ratios Z < 1 and is driven by azobenzene-aggregation compaction mechanism, which is responsible for efficient decompaction. Comparison of phase diagrams for different DNA-photosensitive surfactant systems allowed explanation and proposal of a strategy to overcome previously reported limitations of the light-induced decompaction for complexes with increasing surfactant hydrophobicity.
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Affiliation(s)
- Yuriy Zakrevskyy
- Experimental Physics, Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24-25, D-14476 Potsdam, Germany
| | - Evgenii Titov
- Experimental Physics, Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24-25, D-14476 Potsdam, Germany
| | - Nino Lomadze
- Experimental Physics, Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24-25, D-14476 Potsdam, Germany
| | - Svetlana Santer
- Experimental Physics, Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24-25, D-14476 Potsdam, Germany
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54
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Zakrevskyy Y, Roxlau J, Brezesinski G, Lomadze N, Santer S. Photosensitive surfactants: micellization and interaction with DNA. J Chem Phys 2015; 140:044906. [PMID: 25669582 DOI: 10.1063/1.4862678] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Recently, photosensitive surfactants have re-attracted considerable attention. It has been shown that their association with oppositely charged biologically important polyelectrolytes, such as DNA or microgels, can be efficiently manipulated simply by light exposure. In this article, we investigate the self-assembly of photosensitive surfactants as well as their interactions with DNA by calorimetric and spectroscopic methods. Critical micelle concentration (CMC), standard micellization enthalpy, entropy, and Gibbs energy were determined in different conditions (ionic strengths and temperatures) for a series of cationic surfactants with an azobenzene group in their tail. It is shown, that aggregation forces of photosensitive units play an important role in the micellization giving the major contribution to the micellization enthalpy. The onset of the aggregation can be traced from shift of the absorption peak position in the UV-visible spectrum. Titration UV-visible spectroscopy is used as an alternative, simple, and sensitive approach to estimate CMC. The titration UV-visible spectroscopy was also employed to investigate interactions (CAC: critical aggregation concentration, precipitation, and colloidal stabilization) in the DNA-surfactant complex.
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Affiliation(s)
- Yuriy Zakrevskyy
- Experimental Physics, Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24-25, D-14476 Potsdam, Germany
| | - Julian Roxlau
- Experimental Physics, Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24-25, D-14476 Potsdam, Germany
| | - Gerald Brezesinski
- Department of Interfaces, Max Planck Institute of Colloids and Interfaces, Research Campus Potsdam-Golm, D-14476 Potsdam, Germany
| | - Nino Lomadze
- Experimental Physics, Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24-25, D-14476 Potsdam, Germany
| | - Svetlana Santer
- Experimental Physics, Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24-25, D-14476 Potsdam, Germany
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55
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Xu L, Feng L, Hao J, Dong S. Controlling the capture and release of DNA with a dual-responsive cationic surfactant. ACS APPLIED MATERIALS & INTERFACES 2015; 7:8876-8885. [PMID: 25850815 DOI: 10.1021/acsami.5b01514] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A dual-responsive cationic surfactant, 4-ethoxy-4'-(trimethyl- aminoethoxy) azobenzene trichloromonobromoferrate (azoTAFe), which contains both a light-responsive moiety azobenzene and a paramagnetic counterion, [FeCl3Br](-), was designed and synthesized. Not only does this cationic surfactant abundantly utilize inexhaustible and clean sources, i.e., light and magnetic field, but it also serves as a powerful dual-switch molecule for effectively controlling the capture and release of DNA. Our results could provide potential applications in gene therapy for creating smart and versatile machines to control the transport and delivery of DNA more intelligently and robustly. It was proved that the light switch can independently realize a reversible DNA compaction. The introduction of a magnetic switch can significantly enhance the compaction efficiency, help compact DNA with a lower dosage and achieve a magnetic field-based targeted transport of DNA. In addition, the light switch can make up the irreversibility of magnetic switch. This kind of self-complementation makes the cationic azoTAFe be useful as a potential tool that can be applied to the field of gene therapy and nanomedicine.
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56
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Satpathi S, Sengupta A, Hridya VM, Gavvala K, Koninti RK, Roy B, Hazra P. A Green Solvent Induced DNA Package. Sci Rep 2015. [PMCID: PMC5378943 DOI: 10.1038/srep09137] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Mechanistic details of DNA compaction is essential blue print for gene regulation in living organisms. Many in vitro studies have been implemented using several compaction agents. However, these compacting agents may have some kinds of cytotoxic effects to the cells. To minimize this aspect, several research works had been performed, but people have never focused green solvent, i.e. room temperature ionic liquid as DNA compaction agent. To the best of our knowledge, this is the first ever report where we have shown that guanidinium tris(pentafluoroethyl)trifluorophosphate (Gua-IL) acts as a DNA compacting agent. The compaction ability of Gua-IL has been verified by different spectroscopic techniques, like steady state emission, circular dichroism, dynamic light scattering and UV melting. Notably, we have extensively probed this compaction by Gua-IL through field emission scanning electron microscopy (FE-SEM) and fluorescence microscopy images. We also have discussed the plausible compaction mechanism process of DNA by Gua-IL. Our results suggest that Gua-IL forms a micellar kind of self aggregation above a certain concentration (≥1 mM), which instigates this compaction process. This study divulges the specific details of DNA compaction mechanism by a new class of compaction agent, which is highly biodegradable and eco friendly in nature.
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57
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58
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Tabor RF, Pottage MJ, Garvey CJ, Wilkinson BL. Light-induced structural evolution of photoswitchable carbohydrate-based surfactant micelles. Chem Commun (Camb) 2015; 51:5509-12. [DOI: 10.1039/c4cc07657e] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
We report the light-induced structural evolution of photoswitchable carbohydrate-based surfactant micelles using time-resolved small-angle neutron scattering (TR-SANS), monitoring the structural changes in micellisation in situ over time and demonstrating for the first time the course and implications of this process.
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59
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Jia K, Cheng Y, Liu X, Li X, Dong J. Thermal, light and pH triple stimulated changes in self-assembly of a novel small molecular weight amphiphile binary system. RSC Adv 2015. [DOI: 10.1039/c4ra13038c] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Temperature, light and pH induced morphological of C10AZOC2IMB and 4FS binary systems.
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Affiliation(s)
- Kangle Jia
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- PR China
| | - Yuming Cheng
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- PR China
| | - Xiong Liu
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- PR China
| | - Xuefeng Li
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- PR China
| | - Jinfeng Dong
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- PR China
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60
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Xu L, Feng L, Dong S, Hao J. Magnetic controlling of migration of DNA and proteins using one-step modified gold nanoparticles. Chem Commun (Camb) 2015; 51:9257-60. [DOI: 10.1039/c5cc01738f] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
One-step modified magnetic AuNPs coated with paramagnetic cationic surfactants were produced and used for controlling migration of DNA and proteins.
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Affiliation(s)
- Lu Xu
- Key Laboratory of Colloid and Interface Chemistry & Key Laboratory of Special Aggregated Materials
- Shandong University
- Jinan 250100
- China
| | - Lei Feng
- Key Laboratory of Colloid and Interface Chemistry & Key Laboratory of Special Aggregated Materials
- Shandong University
- Jinan 250100
- China
| | - Shuli Dong
- Key Laboratory of Colloid and Interface Chemistry & Key Laboratory of Special Aggregated Materials
- Shandong University
- Jinan 250100
- China
| | - Jingcheng Hao
- Key Laboratory of Colloid and Interface Chemistry & Key Laboratory of Special Aggregated Materials
- Shandong University
- Jinan 250100
- China
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61
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Tabor RF, Tan DD, Han SS, Young SA, Seeger ZLE, Pottage MJ, Garvey CJ, Wilkinson BL. Reversible pH‐ and Photocontrollable Carbohydrate‐Based Surfactants. Chemistry 2014; 20:13881-4. [DOI: 10.1002/chem.201404945] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2014] [Indexed: 12/17/2022]
Affiliation(s)
- Rico F. Tabor
- School of Chemistry, Monash University, Victoria 3800 (Australia)
| | - David D. Tan
- School of Chemical and Life Sciences, Nanyang Polytechnic, Singapore 569830 (Singapore)
| | - Sean S. Han
- School of Chemical and Life Sciences, Nanyang Polytechnic, Singapore 569830 (Singapore)
| | - Scott A. Young
- School of Chemistry, Monash University, Victoria 3800 (Australia)
| | - Zoe L. E. Seeger
- School of Chemistry, Monash University, Victoria 3800 (Australia)
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62
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Venancio-Marques A, Bergen A, Rossi-Gendron C, Rudiuk S, Baigl D. Photosensitive polyamines for high-performance photocontrol of DNA higher-order structure. ACS NANO 2014; 8:3654-3663. [PMID: 24580129 DOI: 10.1021/nn500266b] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Polyamines are small, ubiquitous, positively charged molecules that play an essential role in numerous biological processes such as DNA packaging, gene regulation, neuron activity, and cell proliferation. Here, we synthesize the first series of photosensitive polyamines (PPAs) and demonstrate their ability to photoreversibly control nanoscale DNA higher-order structure with high efficiency. We show with fluorescence microscopy imaging that the efficiency of the PPAs as DNA-compacting agents is directly correlated to their molecular charge. Micromolar concentration of the most efficient molecule described here, a PPA containing three charges at neutral pH, compacts DNA molecules from a few kilobase pairs to a few hundred kilobase pairs, while subsequent 3 min UV illuminations at 365 nm triggers complete unfolding of DNA molecules. Additional application of blue light (440 nm for 3 min) induces the refolding of DNA into the compact state. Atomic force microscopy reveals that the compaction involves a global folding of the whole DNA molecule, whereas UV-induced unfolding is a modification initiated from the periphery of the compacted DNA, resulting in the occurrence of intermediate flower-like structures prior to the fully unfolded state.
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Affiliation(s)
- Anna Venancio-Marques
- Ecole Normale Supérieure-PSL Research University , Department of Chemistry, 24 Rue Lhomond, F-75005, Paris, France
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63
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Jafari MR, Deng L, Kitov PI, Ng S, Matochko WL, Tjhung KF, Zeberoff A, Elias A, Klassen JS, Derda R. Discovery of light-responsive ligands through screening of a light-responsive genetically encoded library. ACS Chem Biol 2014; 9:443-50. [PMID: 24195775 DOI: 10.1021/cb4006722] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Light-responsive ligands are useful tools in biochemistry and cell biology because the function of these ligands can be spatially and temporally controlled. Conventional design of such ligands relies on previously available data about the structure of both the ligand and the receptor. In this paper, we describe de novo discovery of light-responsive ligands through screening of a genetically encoded light-responsive library. We ligated a photoresponsive azobenzene core to a random CX7C peptide library displayed on the coat protein of M13 phage. A one-pot alkylation/reduction of the cysteines yielded a photoresponsive library of random heptapeptide macrocycles with over 2 × 10(8) members. We characterized the reaction on-phage and optimized the yield of the modifications in phage libraries. Screening of the library against streptavidin yielded three macrocycles that bind to streptavidin in the dark and cease binding upon irradiation with 370 nm light. All ligands restored their binding properties upon thermal relaxation and could be turned ON and OFF for several cycles. We measured dissociation constants, Kd, by electrospray ionization mass spectrometry (ESI-MS) binding assay. For ligand ACGFERERTCG, the Kd of cis and trans isomers differed by 22-fold; an incomplete isomerization (85%), however, resulted in the apparent difference of 4.5-fold between the dark and the irradiated state. We anticipate that the selection strategy described in this report can be used to find light-responsive ligands for many targets that do not have known natural ligands.
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Affiliation(s)
- Mohammad R. Jafari
- Department
of Chemistry and Alberta Glycomics Centre, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - Lu Deng
- Department
of Chemistry and Alberta Glycomics Centre, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - Pavel I. Kitov
- Department
of Chemistry and Alberta Glycomics Centre, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - Simon Ng
- Department
of Chemistry and Alberta Glycomics Centre, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - Wadim L. Matochko
- Department
of Chemistry and Alberta Glycomics Centre, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - Katrina F. Tjhung
- Department
of Chemistry and Alberta Glycomics Centre, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - Anthony Zeberoff
- Department
of Chemical and Material Engineering, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - Anastasia Elias
- Department
of Chemical and Material Engineering, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - John S. Klassen
- Department
of Chemistry and Alberta Glycomics Centre, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - Ratmir Derda
- Department
of Chemistry and Alberta Glycomics Centre, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
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64
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Zakrevskyy Y, Cywinski P, Cywinska M, Paasche J, Lomadze N, Reich O, Löhmannsröben HG, Santer S. Interaction of photosensitive surfactant with DNA and poly acrylic acid. J Chem Phys 2014; 140:044907. [DOI: 10.1063/1.4862679] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
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65
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Lu Y, Zhou T, Fan Q, Dong J, Li X. Light-responsive viscoelastic fluids based on anionic wormlike micelles. J Colloid Interface Sci 2013; 412:107-11. [DOI: 10.1016/j.jcis.2013.09.014] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2013] [Revised: 09/13/2013] [Accepted: 09/14/2013] [Indexed: 10/26/2022]
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66
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Venancio-Marques A, Liu YJ, Diguet A, di Maio T, Gautier A, Baigl D. Modification-free photocontrol of β-lactam conversion with spatiotemporal resolution. ACS Synth Biol 2012; 1:526-31. [PMID: 23656229 DOI: 10.1021/sb300010a] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
β-Lactams can be converted into β-amino acids by β-lactamase, a bacterial enzyme, leading to significant change in the biological function of the substrate molecules. Here we describe a method for photocontrol of β-lactam conversion without gene nor enzyme modification. This is achieved by the addition of a cationic photosensitive surfactant, AzoTAB, to a gene expression medium containing DNA coding for β-lactamase, the enzyme capable of the desired conversion. In the absence of UV (365 nm) or after illumination by blue light (480 nm) for 4 min, conversion of β-lactam is strongly reduced while the application of UV for 4 min results in a strong enhancement of substrate conversion. Several cycles of activation/inhibition are obtained upon successive UV/blue light illuminations. When both reconstituted photoresponsive gene expression medium and β-lactamase substrate are encapsulated in independent microfluidic chambers, selective UV illumination results in spatially resolved activation of substrate conversion.
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Affiliation(s)
- Anna Venancio-Marques
- Department of Chemistry, Ecole Normale Supérieure, 75005 Paris, France
- Université Pierre et Marie Curie Paris 6, 75005 Paris, France
- UMR 8640, CNRS, France
| | - Yan-Jun Liu
- Department of Chemistry, Ecole Normale Supérieure, 75005 Paris, France
- Université Pierre et Marie Curie Paris 6, 75005 Paris, France
- UMR 8640, CNRS, France
| | - Antoine Diguet
- Department of Chemistry, Ecole Normale Supérieure, 75005 Paris, France
- Université Pierre et Marie Curie Paris 6, 75005 Paris, France
- UMR 8640, CNRS, France
| | - Thomas di Maio
- Department of Chemistry, Ecole Normale Supérieure, 75005 Paris, France
- Université Pierre et Marie Curie Paris 6, 75005 Paris, France
- UMR 8640, CNRS, France
| | - Arnaud Gautier
- Department of Chemistry, Ecole Normale Supérieure, 75005 Paris, France
- Université Pierre et Marie Curie Paris 6, 75005 Paris, France
- UMR 8640, CNRS, France
| | - Damien Baigl
- Department of Chemistry, Ecole Normale Supérieure, 75005 Paris, France
- Université Pierre et Marie Curie Paris 6, 75005 Paris, France
- UMR 8640, CNRS, France
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67
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Rudiuk S, Venancio-Marques A, Baigl D. Enhancement and modulation of enzymatic activity through higher-order structural changes of giant DNA-protein multibranch conjugates. Angew Chem Int Ed Engl 2012; 51:12694-8. [PMID: 23143988 DOI: 10.1002/anie.201206962] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2012] [Revised: 10/02/2012] [Indexed: 11/06/2022]
Affiliation(s)
- Sergii Rudiuk
- Department of Chemistry, Ecole Normale Supérieure, 24 rue Lhomond, 75005 Paris, France
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68
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Rudiuk S, Venancio-Marques A, Baigl D. Enhancement and Modulation of Enzymatic Activity through Higher-Order Structural Changes of Giant DNA-Protein Multibranch Conjugates. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201206962] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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69
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Baigl D. Photo-actuation of liquids for light-driven microfluidics: state of the art and perspectives. LAB ON A CHIP 2012; 12:3637-53. [PMID: 22864577 DOI: 10.1039/c2lc40596b] [Citation(s) in RCA: 126] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Using light to control liquid motion is a new paradigm for the actuation of microfluidic systems. We review here the different principles and strategies to induce or control liquid motion using light, which includes the use of radiation pressure, optical tweezers, light-induced wettability gradients, the thermocapillary effect, photosensitive surfactants, the chromocapillary effect, optoelectrowetting, photocontrolled electroosmotic flows and optical dielectrophoresis. We analyze the performance of these approaches to control using light many kinds of microfluidic operations involving discrete pL- to μL-sized droplets (generation, driving, mixing, reaction, sorting) or fluid flows in microchannels (valve operation, injection, pumping, flow rate control). We show that a complete toolbox is now available to control microfluidic systems by light. We finally discuss the perspectives of digital optofluidics as well as microfluidics based on all optical fluidic chips and optically reconfigurable devices.
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Affiliation(s)
- Damien Baigl
- Department of Chemistry, Ecole Normale Supérieure, Paris, France.
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70
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Pyshkina OA, Sergeyev VG. Complexes of nucleic acids with oppositely charged amphiphilic ions in aqueous and organic solutions. POLYMER SCIENCE SERIES C 2012. [DOI: 10.1134/s1811238212060033] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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71
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Uda RM, Ohshita M. Phototriggered DNA Complexation and Compaction Using Poly(vinyl alcohol) Carrying a Malachite Green Moiety. Biomacromolecules 2012; 13:1510-4. [DOI: 10.1021/bm3001952] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ryoko M. Uda
- Department of Chemical Engineering, Nara National College of Technology, Yata 22, Yamato-koriyama,
Nara 639-1080, Japan
| | - Minami Ohshita
- Department of Chemical Engineering, Nara National College of Technology, Yata 22, Yamato-koriyama,
Nara 639-1080, Japan
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72
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Diguet A, Yanagisawa M, Liu YJ, Brun E, Abadie S, Rudiuk S, Baigl D. UV-induced bursting of cell-sized multicomponent lipid vesicles in a photosensitive surfactant solution. J Am Chem Soc 2012; 134:4898-904. [PMID: 22316240 PMCID: PMC3303198 DOI: 10.1021/ja211664f] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
We study the behavior of multicomponent giant unilamellar vesicles (GUVs) in the presence of AzoTAB, a photosensitive surfactant. GUVs are made of an equimolar ratio of dioleoylphosphatidylcholine (DOPC) and dipalmitoylphosphatidylcholine (DPPC) and various amounts of cholesterol (Chol), where the lipid membrane shows a phase separation into a DPPC-rich liquid-ordered (L(o)) phase and a DOPC-rich liquid-disordered (L(d)) phase. We find that UV illumination at 365 nm for 1 s induces the bursting of a significant fraction of the GUV population. The percentage of UV-induced disrupted vesicles, called bursting rate (Y(burst)), increases with an increase in [AzoTAB] and depends on [Chol] in a non-monotonous manner. Y(burst) decreases when [Chol] increases from 0 to 10 mol % and then increases with a further increase in [Chol], which can be correlated with the phase composition of the membrane. We show that Y(burst) increases with the appearance of solid domains ([Chol] = 0) or with an increase in area fraction of L(o) phase (with increasing [Chol] ≥ 10 mol %). Under our conditions (UV illumination at 365 nm for 1 s), maximal bursting efficiency (Y(burst) = 53%) is obtained for [AzoTAB] = 1 mM and [Chol] = 40 mol %. Finally, by restricting the illumination area, we demonstrate the first selective UV-induced bursting of individual target GUVs. These results show a new method to probe biomembrane mechanical properties using light as well as pave the way for novel strategies of light-induced drug delivery.
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Affiliation(s)
- Antoine Diguet
- Department of Chemistry, Ecole Normale Supérieure, 24 rue Lhomond, 75005 Paris, France
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73
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Mondal JA, Saha G, Sinha C, Palit DK. Photoisomerization dynamics of N-1-methyl-2-(tolylazo) imidazole and the effect of complexation with Cu(ii). Phys Chem Chem Phys 2012; 14:13027-34. [DOI: 10.1039/c2cp41466j] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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74
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Li W, Wang Y, Chen L, Huang Z, Hu Q, Ji J. Light-regulated host–guest interaction as a new strategy for intracellular PEG-detachable polyplexes to facilitate nuclear entry. Chem Commun (Camb) 2012; 48:10126-8. [DOI: 10.1039/c2cc34768g] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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75
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Fukaminato T, Tateyama E, Tamaoki N. Fluorescence photoswitching based on a photochromic pKa change in an aqueous solution. Chem Commun (Camb) 2012; 48:10874-6. [DOI: 10.1039/c2cc35889a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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76
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Zinchenko AA, Tanahashi M, Murata S. Photochemical Modulation of DNA Conformation by Organic Dications. Chembiochem 2011; 13:105-11. [DOI: 10.1002/cbic.201100492] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2011] [Indexed: 11/12/2022]
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77
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Magome N, Kanaporis G, Moisan N, Tanaka K, Agladze K. Photo-Control of Excitation Waves in Cardiomyocyte Tissue Culture. Tissue Eng Part A 2011; 17:2703-11. [DOI: 10.1089/ten.tea.2010.0745] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Nobuyuki Magome
- Institute for Integrated Cell-Material Sciences (iCeMS), Kyoto University, Kyoto, Japan
| | - Giedrius Kanaporis
- Institute of Cardiology, Lithuanian University of Health Sciences, Kaunas, Lithuania
| | - Nicolas Moisan
- Institute for Integrated Cell-Material Sciences (iCeMS), Kyoto University, Kyoto, Japan
| | - Koichiro Tanaka
- Institute for Integrated Cell-Material Sciences (iCeMS), Kyoto University, Kyoto, Japan
| | - Konstantin Agladze
- Institute for Integrated Cell-Material Sciences (iCeMS), Kyoto University, Kyoto, Japan
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78
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Rudiuk S, Yoshikawa K, Baigl D. Enhancement of DNA compaction by negatively charged nanoparticles: effect of nanoparticle size and surfactant chain length. J Colloid Interface Sci 2011; 368:372-7. [PMID: 22071517 DOI: 10.1016/j.jcis.2011.10.033] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2011] [Revised: 10/12/2011] [Accepted: 10/13/2011] [Indexed: 11/29/2022]
Abstract
We study the compaction of genomic DNA by a series of alkyltrimethylammonium bromide surfactants having different hydrocarbon chain lengths n: dodecyl-(DTAB, n=12), tetradecyl-(TTAB, n=14) and hexadecyl-(CTAB, n=16), in the absence and in the presence of negatively charged silica nanoparticles (NPs) with a diameter in the range 15-100 nm. We show that NPs greatly enhance the ability of all cationic surfactants to induce DNA compaction and that this enhancement increases with an increase in NP diameter. In the absence of NP, the ability of cationic surfactants to induce DNA compaction increases with an increase in n. Conversely, in the presence of NPs, the enhancement of DNA compaction increases with a decrease in n. Therefore, although CTAB is the most efficient surfactant to compact DNA, maximal enhancement by NPs is obtained for the largest NP diameter (here, 100 nm) and the smallest surfactant chain length (here, DTAB). We suggest a mechanism where the preaggregation of surfactants on NP surface mediated by electrostatic interactions promotes cooperative binding to DNA and thus enhances the ability of surfactants to compact DNA. We show that the amplitude of enhancement is correlated with the difference between the surfactant concentration corresponding to aggregation on DNA alone and that corresponding to the onset of adsorption on nanoparticles.
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Affiliation(s)
- Sergii Rudiuk
- Department of Physics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
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79
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Rudiuk S, Saito H, Hara T, Inoue T, Yoshikawa K, Baigl D. Light-Regulated mRNA Condensation by a Photosensitive Surfactant Works as a Series Photoswitch of Translation Activity in the Presence of Small RNAs. Biomacromolecules 2011; 12:3945-51. [DOI: 10.1021/bm200962s] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Sergii Rudiuk
- Department of Physics, Graduate
School of Science, Kyoto University, Kyoto
606-8502, Japan
| | - Hirohide Saito
- Laboratory
of Gene Biodynamics,
Graduate School of Biostudies, Kyoto University, Kyoto 606-8502, Japan
| | - Tomoaki Hara
- Laboratory
of Gene Biodynamics,
Graduate School of Biostudies, Kyoto University, Kyoto 606-8502, Japan
| | - Tan Inoue
- Laboratory
of Gene Biodynamics,
Graduate School of Biostudies, Kyoto University, Kyoto 606-8502, Japan
| | - Kenichi Yoshikawa
- Department of Physics, Graduate
School of Science, Kyoto University, Kyoto
606-8502, Japan
| | - Damien Baigl
- Department of Chemistry, Ecole Normale Supérieure, 75005 Paris, France
- Université Pierre et Marie Curie − Paris 6, 75005 Paris,
France
- UMR 8640, CNRS, Paris, France
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80
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Light and host–guest inclusion mediated salmon sperm DNA/surfactant interactions. J Colloid Interface Sci 2011; 362:430-8. [DOI: 10.1016/j.jcis.2011.06.083] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2011] [Revised: 06/29/2011] [Accepted: 06/30/2011] [Indexed: 11/22/2022]
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81
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General hydrophobic interaction potential for surfactant/lipid bilayers from direct force measurements between light-modulated bilayers. Proc Natl Acad Sci U S A 2011; 108:15699-704. [PMID: 21896718 DOI: 10.1073/pnas.1112411108] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
We establish and quantify correlations among the molecular structures, interaction forces, and physical processes associated with light-responsive self-assembled surfactant monolayers or bilayers at interfaces. Using the surface forces apparatus (SFA), the interaction forces between adsorbed monolayers and bilayers of an azobenzene-functionalized surfactant can be drastically and controllably altered by light-induced conversion of trans and cis molecular conformations. These reversible conformation changes affect significantly the shape of the molecules, especially in the hydrophobic region, which induces dramatic transformations of molecular packing in self-assembled structures, causing corresponding modulation of electrostatic double layer, steric hydration, and hydrophobic interactions. For bilayers, the isomerization from trans to cis exposes more hydrophobic groups, making the cis bilayers more hydrophobic, which lowers the activation energy barrier for (hemi)fusion. A quantitative and general model is derived for the interaction potential of charged bilayers that includes the electrostatic double-layer force of the Derjaguin-Landau-Verwey-Overbeek theory, attractive hydrophobic interactions, and repulsive steric-hydration forces. The model quantitatively accounts for the elastic strains, deformations, long-range forces, energy maxima, adhesion minima, as well as the instability (when it exists) as two bilayers breakthrough and (hemi)fuse. These results have several important implications, including quantitative and qualitative understanding of the hydrophobic interaction, which is furthermore shown to be a nonadditive interaction.
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82
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Zakrevskyy Y, Kopyshev A, Lomadze N, Morozova E, Lysyakova L, Kasyanenko N, Santer S. DNA compaction by azobenzene-containing surfactant. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2011; 84:021909. [PMID: 21929022 DOI: 10.1103/physreve.84.021909] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2011] [Indexed: 05/28/2023]
Abstract
We report on the interaction of cationic azobenzene-containing surfactant with DNA investigated by absorption and fluorescence spectroscopy, dynamic light scattering, and atomic force microscopy. The properties of the surfactant can be controlled with light by reversible switching of the azobenzene unit, incorporated into the surfactant tail, between a hydrophobic trans (visible irradiation) and a hydrophilic cis (UV irradiation) configuration. The influence of the trans-cis isomerization of the azobenzene on the compaction process of DNA molecules and the role of both isomers in the formation and colloidal stability of DNA-surfactant complexes is discussed. It is shown that the trans isomer plays a major role in the DNA compaction process. The influence of the cis isomer on the DNA coil configuration is rather small. The construction of a phase diagram of the DNA concentration versus surfactant/DNA charge ratio allows distancing between three major phases: colloidally stable and unstable compacted globules, and extended coil conformation. There is a critical concentration of DNA above which the compacted globules can be hindered from aggregation and precipitation by adding an appropriate amount of the surfactant in the trans configuration. This is because of the compensation of hydrophobicity of the globules with an increasing amount of the surfactant. Below the critical DNA concentration, the compacted globules are colloidally stable and can be reversibly transferred with light to an extended coil state.
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Affiliation(s)
- Yuriy Zakrevskyy
- Experimental Physics, Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Strasse 24/25, D-14476 Potsdam, Germany.
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83
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Zhou J, Ke F, Liang D. Kinetic study on the reentrant condensation of oligonucleotide in trivalent salt solution. J Phys Chem B 2011; 114:13675-80. [PMID: 20936839 DOI: 10.1021/jp1074187] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The reentrant condensation of 21-bp oligonucleotide in the presence of spermidine was investigated by laser light scattering and capillary electrophoresis. 21-bp oligonucleotide showed a bimodal distribution in 1 × TE buffer, with the slow mode being the characteristic diffusion of polyelectrolyte in solution without enough salt. At the fixed spermidine concentration, the reentry of oligonucleotide underwent aggregation, phase separation, and disassociation in sequence with time, and the kinetics was extremely slow. For example, it took more than 1200 h (50 days) for the reentry to complete at 21 mM spermidine. Higher spermidine concentration led to faster kinetics. After reentry, the slow mode disappeared, and the charges of oligonucleotide were at least partially neutralized. No prominent charge inversion was observed. The kinetics of oligonucleotide reentry in the presence of spermidine gained insight in the interactions of polyelectrolyte in aqueous solution.
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Affiliation(s)
- Jihan Zhou
- Beijing National Laboratory for Molecular Sciences and the Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing, China, 100871
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84
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Fu Y, Wang X, Zhang J, Xiao Y, Li W, Wang J. Orderly microaggregates of G-/C-rich oligonucleotides associated with spermine. Biomacromolecules 2011; 12:747-56. [PMID: 21235226 DOI: 10.1021/bm101372h] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Spermine-induced orderly assembling properties of G-/C-rich oligonucleotides are investigated in dilute and crowding conditions. The first time we report that the parallel G-quadruplexes is preferential to condense into anisotropic microaggregates in the presence of spermine, whereas the hybrid-type and the antiparallel G-quadruplexes have no significant interactions with spermine; and spermine can induce the condensation of i-motif C-rich oligonucleotides other than the random coiled C-rich strands. Moreover, the condensation of C-rich oligonucleotides can be reversibly regulated by pH and temperature. G-/C-rich oligonucleotides exhibit the cholesteric liquid crystalline phase at low strand concentration in the presence of spermine under crowding conditions. The results illuminate that the parallel G-quadruplex and i-motifs are probably necessity conformations for G-/C-rich oligonucleotides that involved in the regulation of chromosome organization in living cells.
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Affiliation(s)
- Yan Fu
- Key Laboratory for Green Chemical Technology MOE, Tianjin University, Tianjin 300072, People's Republic of China
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85
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Santhiya D, Maiti S. An investigation on interaction between 14mer DNA oligonucleotide and CTAB by fluorescence and fluorescence resonance energy transfer studies. J Phys Chem B 2010; 114:7602-8. [PMID: 20469940 DOI: 10.1021/jp909522r] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Possible interaction mechanisms between oligonucleotide (DNA) of 14 base pairs with cetyl trimethyl ammonium bromide (CTAB) were postulated based on fluorescence and fluorescence resonance energy transfer (FRET) studies. Detailed FRET investigations were carried out by fluorometric titrations of the surfactant with various oligonucleotide duplexes with 5'-tagged fluorescein (donor) (D(D)), 5'-tagged TAMRA (acceptor) (D(A)) and both (D(DA)). In general, fluorescence spectra of the duplexes (D(D), D(A) and D(DA)) revealed a reduction in the fluorescence intensities of 5'-fluorescein as well as 5'-TAMRA and thereafter an attainment of saturation with increase in the surfactant concentration. The observed changes in the oligonucleotide fluorescence intensities for the duplexes under investigation could be attributed to the microenvironmental changes during the oligonucleotide-CTAB interaction. Considering together, it appeared that the interaction is a three-stage process, wherein the initial addition of surfactant caused neutralization of the 14mer at Z(+/-)(1) = 0.8, which is manifested by a slight reduction in fluorescence intensity. Further, addition of the surfactant molecules sharply reduced the fluorescence intensity of the oligonucleotide depicting oligonucleotide induced self-assembly until the second break point (Z(+/-)(2) = 1.7). From the second break point, a striking resonance energy transfer was observed from donor to acceptor, which revealed shortening of distance between 5' ends of the oligonucleotides that attained a saturation at Z(+/-)(3) = 2.5. Similar three-stage interaction of oligonucleotide with the surfactant has also been observed through fluorometric titrations in the presence of NaCl. However, in the presence of the salt, neutralization of oligonucleotide, surfactant aggregation and FRET occurred at higher charge ratios due to the screening effect of Na+ ions followed by an increase in critical association concentration (CAC) of the surfactant. Overall, investigations probe possible structural changes in the 14mer oligonucleotide-CTAB complex upon increase in the surfactant concentration.
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Affiliation(s)
- Deenan Santhiya
- Institute for Genomics and Integrative Biology, CSIR, Mall Road, Delhi 110 007, India
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86
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Diguet A, Mani NK, Geoffroy M, Sollogoub M, Baigl D. Photosensitive Surfactants with Various Hydrophobic Tail Lengths for the Photocontrol of Genomic DNA Conformation with Improved Efficiency. Chemistry 2010; 16:11890-6. [DOI: 10.1002/chem.201001579] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Antoine Diguet
- Department of Chemistry, Ecole Normale Superieure, 24 rue Lhomond, 75005 Paris (France), Fax: (+33) 1‐4432‐2402
| | - Naresh Kumar Mani
- Department of Chemistry, Ecole Normale Superieure, 24 rue Lhomond, 75005 Paris (France), Fax: (+33) 1‐4432‐2402
| | - Marie Geoffroy
- Department of Chemistry, Ecole Normale Superieure, 24 rue Lhomond, 75005 Paris (France), Fax: (+33) 1‐4432‐2402
| | - Matthieu Sollogoub
- UPMC Univ Paris 06, Institut Parisien de Chimie Moléculaire (UMR CNRS 7201), FR 2769, C. 181, 4 Place Jussieu, 75005 Paris (France)
| | - Damien Baigl
- Department of Chemistry, Ecole Normale Superieure, 24 rue Lhomond, 75005 Paris (France), Fax: (+33) 1‐4432‐2402
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87
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Cyclodextrins in DNA decompaction. Colloids Surf B Biointerfaces 2010; 76:20-7. [DOI: 10.1016/j.colsurfb.2009.10.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2009] [Revised: 09/30/2009] [Accepted: 10/01/2009] [Indexed: 11/21/2022]
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88
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Protection of Human Genomic DNA from Mechanical Stress by Reversible Folding Transition. Chembiochem 2010; 11:340-3. [DOI: 10.1002/cbic.200900734] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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89
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Yu M, Zu SZ, Chen Y, Liu YP, Han BH, Liu Y. Spatially Controllable DNA Condensation by a Water-Soluble Supramolecular Hybrid of Single-Walled Carbon Nanotubes and β-Cyclodextrin-Tethered Ruthenium Complexes. Chemistry 2010; 16:1168-74. [DOI: 10.1002/chem.200902627] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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90
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Lee CT, Smith KA, Hatton TA. Small-angle neutron scattering study of the micellization of photosensitive surfactants in solution and in the presence of a hydrophobically modified polyelectrolyte. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:13784-13794. [PMID: 19715336 DOI: 10.1021/la9016239] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The self-assembly behavior of a light-sensitive azobenzene-based surfactant, both in pure surfactant solutions and in the presence of a hydrophobically modified, water-soluble polymer, has been investigated using small-angle neutron scattering (SANS), light scattering, and UV-vis absorption techniques. The surfactant undergoes reversible photoisomerization upon exposure to the appropriate wavelength of light, with the trans form predominant under visible light being more hydrophobic than the cis isomer under UV-light. As a result, the trans form exhibits a lower critical micelle concentration than does the cis form of the surfactant, allowing photoreversible control of micelle formation. The SANS measurements reveal that micelle formation in pure surfactant solutions with the trans surfactant proceeds as commonly observed in traditional alkyl-based surfactants. Fully developed micelles were observed with aggregation numbers >50, whereas the micelle shapes are consistent with triaxial ellipsoids with axes R(a), R(b), and R(c) approximately equal to 20, 30, and 30-35 A, respectively. In contrast, with the surfactant in the cis conformation disk-shaped premicellar aggregates were observed at low surfactant concentrations with aggregation numbers <10, thicknesses of 6-10 A, and radii of 10-20 A whereas elevated cis-azoTAB concentrations eventually gave rise to fully developed micelles akin to the trans micelles. This stark difference between the self-assembly behavior of the two azobenzene isomers is ascribed to the different geometries of the surfactant in the trans (planar) and cis (bent) conformation. In the presence of the hydrophobically modified polymer, however, both surfactant isomers resulted in well-developed micelles at the respective critical aggregation concentrations (cac's), presumably because of the effect of the dodecyl side chains attached to the polymer on the conformation of the mixed alkyl-azobenzene micelles.
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Affiliation(s)
- C Ted Lee
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
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91
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Diguet A, Guillermic RM, Magome N, Saint-Jalmes A, Chen Y, Yoshikawa K, Baigl D. Photomanipulation of a Droplet by the Chromocapillary Effect. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200904868] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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92
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Diguet A, Guillermic RM, Magome N, Saint-Jalmes A, Chen Y, Yoshikawa K, Baigl D. Photomanipulation of a Droplet by the Chromocapillary Effect. Angew Chem Int Ed Engl 2009; 48:9281-4. [DOI: 10.1002/anie.200904868] [Citation(s) in RCA: 205] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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93
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Liu X, Abbott NL. Spatial and temporal control of surfactant systems. J Colloid Interface Sci 2009; 339:1-18. [PMID: 19665723 PMCID: PMC3253364 DOI: 10.1016/j.jcis.2009.07.006] [Citation(s) in RCA: 87] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2009] [Revised: 06/30/2009] [Accepted: 07/01/2009] [Indexed: 01/08/2023]
Abstract
This paper reviews some recent progress on approaches leading to spatial and temporal control of surfactant systems. The approaches revolve around the use of redox-active and light-sensitive surfactants. Perspectives are presented on experiments that have realized approaches for active control of interfacial properties of aqueous surfactant systems, reversible control of microstructures and nanostructures formed within bulk solutions, and in situ manipulation of the interactions of surfactants with polymers, DNA and proteins. A particular focus of this review is devoted to studies of amphiphiles that contain the redox-active group ferrocene - reversible control of the oxidation state of ferrocene leads to changes in the charge/hydrophobicity of these amphiphiles, resulting in substantial changes in their self-assembly. Light-sensitive surfactants containing azobenzene, which undergo changes in shape/polarity upon illumination with light, are a second focus of this review. Examples of both redox-active and light-sensitive surfactants that lead to large (>20mN/m) and spatially localized ( approximately mm) changes in surface tensions on a time scale of seconds are presented. Systems that permit reversible transformations of bulk solution nanostructures - such as micelle-to-vesicle transitions or monomer-to-micelle transitions - are also described. The broad potential utility of these emerging classes of amphiphiles are illustrated by the ability to drive changes in functional properties of surfactant systems, such as rheological properties and reversible solubilization of oils, as well as the ability to control interactions of surfactants with biomolecules to modulate their transport into cells.
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Affiliation(s)
- Xiaoyang Liu
- Department of Chemical and Biological Engineering, University of Wisconsin, 1415 Engineering Drive, Madison, WI 53705-1691
| | - Nicholas L. Abbott
- Department of Chemical and Biological Engineering, University of Wisconsin, 1415 Engineering Drive, Madison, WI 53705-1691
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94
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Estévez-Torres A, Crozatier C, Diguet A, Hara T, Saito H, Yoshikawa K, Baigl D. Sequence-independent and reversible photocontrol of transcription/expression systems using a photosensitive nucleic acid binder. Proc Natl Acad Sci U S A 2009; 106:12219-23. [PMID: 19617550 PMCID: PMC2718349 DOI: 10.1073/pnas.0904382106] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2009] [Indexed: 11/18/2022] Open
Abstract
To understand non-trivial biological functions, it is crucial to develop minimal synthetic models that capture their basic features. Here, we demonstrate a sequence-independent, reversible control of transcription and gene expression using a photosensitive nucleic acid binder (pNAB). By introducing a pNAB whose affinity for nucleic acids is tuned by light, in vitro RNA production, EGFP translation, and GFP expression (a set of reactions including both transcription and translation) were successfully inhibited in the dark and recovered after a short illumination at 365 nm. Our results indicate that the accessibility of the protein machinery to one or several nucleic acid binding sites can be efficiently regulated by changing the conformational/condensation state of the nucleic acid (DNA conformation or mRNA aggregation), thus regulating gene activity in an efficient, reversible, and sequence-independent manner. The possibility offered by our approach to use light to trigger various gene expression systems in a system-independent way opens interesting perspectives to study gene expression dynamics as well as to develop photocontrolled biotechnological procedures.
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Affiliation(s)
- André Estévez-Torres
- Departments of Physics and
- Spatio-Temporal Order Project, ICORP (International Cooperative Research Project), JST (Japan Science and Technology Agency), Kyoto 606-8502, Japan; and
| | | | - Antoine Diguet
- Department of Chemistry, Ecole Normale Supérieure, 75005 Paris, France
| | - Tomoaki Hara
- Gene Mechanisms, Kyoto University, Kyoto 606-8502, Japan
| | - Hirohide Saito
- Gene Mechanisms, Kyoto University, Kyoto 606-8502, Japan
| | - Kenichi Yoshikawa
- Departments of Physics and
- Spatio-Temporal Order Project, ICORP (International Cooperative Research Project), JST (Japan Science and Technology Agency), Kyoto 606-8502, Japan; and
| | - Damien Baigl
- Spatio-Temporal Order Project, ICORP (International Cooperative Research Project), JST (Japan Science and Technology Agency), Kyoto 606-8502, Japan; and
- Department of Chemistry, Ecole Normale Supérieure, 75005 Paris, France
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95
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Zhang J, Wang SC, Lee CT. Photoreversible Conformational Changes in Membrane Proteins Using Light-Responsive Surfactants. J Phys Chem B 2009; 113:8569-80. [DOI: 10.1021/jp807875u] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jing Zhang
- Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, California 90089-1211
| | - Shao-Chun Wang
- Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, California 90089-1211
| | - C. Ted Lee
- Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, California 90089-1211
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96
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Conformation and dynamics of DNA molecules during photoreversible condensation. Biophys Chem 2009; 142:76-83. [DOI: 10.1016/j.bpc.2009.03.010] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2008] [Revised: 03/04/2009] [Accepted: 03/08/2009] [Indexed: 11/24/2022]
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97
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Grueso E, Roldan E, Sanchez F. Kinetic Study of the Cetyltrimethylammonium/DNA Interaction. J Phys Chem B 2009; 113:8319-23. [DOI: 10.1021/jp810966n] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- E. Grueso
- The Department of Physical Chemistry, University of Seville, C/Profesor García González s/n, 41012 Seville, Spain
| | - E. Roldan
- The Department of Physical Chemistry, University of Seville, C/Profesor García González s/n, 41012 Seville, Spain
| | - F. Sanchez
- The Department of Physical Chemistry, University of Seville, C/Profesor García González s/n, 41012 Seville, Spain
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98
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Liu YC, Le Ny ALM, Schmidt J, Talmon Y, Chmelka BF, Lee CT. Photo-assisted gene delivery using light-responsive catanionic vesicles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:5713-5724. [PMID: 19435291 DOI: 10.1021/la803588d] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Photoresponsive catanionic vesicles have been developed as a novel gene delivery vector combining enhanced cellular uptake with phototriggered release of vesicle payload following entry into cells. Vesicles with diameters ranging from 50 to 200 nm [measured using cryo-transmission electron microscopy (TEM) and light-scattering techniques] form spontaneously, following mixing of positively charged azobenzene-containing surfactant and negatively charged alkyl surfactant species. Fluorescent probe measurements showed that the catanionic vesicles at a cation/anion ratio of 7:3 formed at surfactant concentrations as low as 10 microM of the azobenzene surfactant under visible light (with the azobenzene surfactant species principally in the trans configuration), while 50-60 microM of the azobenzene surfactant is required to form vesicles under UV illumination (with the azobenzene surfactant species principally in the cis configuration). At intermediate surfactant concentrations (ca. 15-45 microM) under visible light conditions, transport of DNA-vesicle complexes occurred past the cell membrane of murine fibroblast NIH 3T3 cells through endocytosis. Subsequent UV illumination induced rupture of the vesicles and release of uncomplexed DNA into the cell interiors, where it was capable of passing through the nuclear membrane and thereby contributing to enhanced expression. Single-molecule fluorescent images of T4-DNA demonstrated that the formation of vesicles with a net positive charge led to compaction of DNA molecules via complex formation within a few seconds, while UV-induced disruption of the vesicle-DNA complexes led to DNA re-expansion to the elongated-coil state, also within a few seconds. Transfection experiments with eGFP DNA revealed that photoresponsive catanionic vesicles are more effectively taken up by cells compared to otherwise identical alkyl (i.e., nonazobenzene-containing and thus nonlight-responsive) catanionic vesicles, presumably because of pi-pi stacking interactions that enhance bilayer rigidity in the photoresponsive vesicles. Subsequent UV illumination following endocytosis leads to further dramatic enhancements in the transfection efficiencies, demonstrating that vector unpacking and release of DNA from the carrier complex can be the limiting step in the overall process of gene delivery.
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Affiliation(s)
- Yu-Chuan Liu
- Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, California 90089, USA
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99
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Hamill AC, Lee CT. Photocontrol of β-Amyloid Peptide (1−40) Fibril Growth in the Presence of a Photosurfactant. J Phys Chem B 2009; 113:6164-72. [DOI: 10.1021/jp8080113] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Andrea C. Hamill
- Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, California 90089-1211
| | - C. Ted Lee
- Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, California 90089-1211
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100
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Bhattacharya S, Bajaj A. Advances in gene delivery through molecular design of cationic lipids. Chem Commun (Camb) 2009:4632-56. [DOI: 10.1039/b900666b] [Citation(s) in RCA: 232] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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