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Luque-Caballero G, Maldonado-Valderrama J, Quesada-Pérez M, Martín-Molina A. Atomic force microscopy as a tool to study the adsorption of DNA onto lipid interfaces. Microsc Res Tech 2016; 80:11-17. [PMID: 27014963 DOI: 10.1002/jemt.22654] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Revised: 01/25/2016] [Accepted: 02/05/2016] [Indexed: 11/08/2022]
Abstract
The Atomic Force Microscopy (AFM) technique appears as a central tool for the characterization of DNA adsorption onto lipid interfaces. Regardless of the huge number of surveys devoted to this issue, there are still fascinating phenomena in this field that have not been explored in detail by AFM. For instance, adsorption of DNA onto like-charged lipid surfaces mediated by cations is still not fully understood even though it is gaining popularity nowadays in gene therapy and nanotechnology. Studies related to the complexation of DNA with anionic lipids as a non-viral gene delivery vehicle as well as the formation of self-assembled nanoscale DNA constructs (DNA origami) are two of the most attractive systems. Unfortunately, molecular mechanisms underlying the adsorption of DNA onto anionic lipid interfaces remain unclear so far. In view of that, AFM becomes an appropriate technique to provide valuable information to understand the adsorption of DNA to anionic lipid surfaces. As a second part of this review we provide an illustrative example of application of the AFM technique to probe the DNA adsorption onto a model lipid monolayer negatively charged. Microsc. Res. Tech. 80:11-17, 2017. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Germán Luque-Caballero
- Departamento de Física Aplicada, Universidad de Granada, Campus de Fuentenueva sn, Granada, 18071, Spain
| | - Julia Maldonado-Valderrama
- Departamento de Física Aplicada, Universidad de Granada, Campus de Fuentenueva sn, Granada, 18071, Spain
| | - Manuel Quesada-Pérez
- Departamento de Física, Escuela Politécnica Superior de Linares, Universidad de Jaén, Linares, Jaén, 23700, Spain
| | - Alberto Martín-Molina
- Departamento de Física Aplicada, Universidad de Granada, Campus de Fuentenueva sn, Granada, 18071, Spain
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Iwafuji Y, McNamee CE. Formation of Langmuir Monolayers of Titanium Dioxide Nanoparticles at Air/Aqueous Interfaces by the Addition of Ions to the Subphase: Effect of Ion Concentration and Type. J Phys Chem B 2015; 119:12308-17. [DOI: 10.1021/acs.jpcb.5b05728] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yuya Iwafuji
- Department
of Chemistry and
Materials, Faculty of Textile Science and Technology, Shinshu University, Tokida 3-15-1, Ueda, Nagano 386-8567, Japan
| | - Cathy E. McNamee
- Department
of Chemistry and
Materials, Faculty of Textile Science and Technology, Shinshu University, Tokida 3-15-1, Ueda, Nagano 386-8567, Japan
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Dubrovin EV, Speller S, Yaminsky IV. Statistical analysis of molecular nanotemplate driven DNA adsorption on graphite. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:15423-15432. [PMID: 25470069 DOI: 10.1021/la5041773] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In this work, we have studied the conformation of DNA molecules aligned on the nanotemplates of octadecylamine, stearyl alcohol, and stearic acid on highly oriented pyrolytic graphite (HOPG). For this purpose, fluctuations of contours of adsorbed biopolymers obtained from atomic force microscopy (AFM) images were analyzed using the wormlike chain model. Moreover, the conformations of adsorbed biopolymer molecules were characterized by the analysis of the scaling exponent ν, which relates the mean squared end-to-end distance and contour length of the polymer. During adsorption on octadecylamine and stearyl alcohol nanotemplates, DNA forms straight segments, which order along crystallographic axes of graphite. In this case, the conformation of DNA molecules can be described using two different length scales. On a large length scale (at contour lengths l > 200-400 nm), aligned DNA molecules have either 2D compact globule or partially relaxed 2D conformation, whereas on a short length scale (at l ≤ 200-400 nm) their conformation is close to that of rigid rods. The latter type of conformation can be also assigned to DNA adsorbed on a stearic acid nanotemplate. The different conformation of DNA molecules observed on the studied monolayers is connected with the different DNA-nanotemplate interactions associated with the nature of the functional group of the alkane derivative in the nanotemplate (amine, alcohol, or acid). The persistence length of λ-DNA adsorbed on octadecylamine nanotemplates is 31 ± 2 nm indicating the loss of DNA rigidity in comparison with its native state. Similar values of the persistence length (34 ± 2 nm) obtained for 24-times shorter DNA molecules adsorbed on an octadecylamine nanotemplate demonstrate that this rigidity change does not depend on biopolymer length. Possible reasons for the reduction of DNA persistence length are discussed in view of the internal DNA structure and DNA-surface interaction.
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Affiliation(s)
- E V Dubrovin
- Chair of Physics of Polymers and Crystals, Faculty of Physics, M. V. Lomonosov Moscow State University , Leninskie gory, 1/2, Moscow 119991, Russia
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Luque-Caballero G, Martín-Molina A, Sánchez-Treviño AY, Rodríguez-Valverde MA, Cabrerizo-Vílchez MA, Maldonado-Valderrama J. Using AFM to probe the complexation of DNA with anionic lipids mediated by Ca(2+): the role of surface pressure. SOFT MATTER 2014; 10:2805-2815. [PMID: 24668321 DOI: 10.1039/c3sm52428k] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Complexation of DNA with lipids is currently being developed as an alternative to classical vectors based on viruses. Most of the research to date focuses on cationic lipids owing to their spontaneous complexation with DNA. Nonetheless, recent investigations have revealed that cationic lipids induce a large number of adverse effects on DNA delivery. Precisely, the lower cytotoxicity of anionic lipids accounts for their use as a promising alternative. However, the complexation of DNA with anionic lipids (mediated by cations) is still in early stages and is not yet well understood. In order to explore the molecular mechanisms underlying the complexation of anionic lipids and DNA we proposed a combined methodology based on the surface pressure-area isotherms, Gibbs elasticity and Atomic Force Microscopy (AFM). These techniques allow elucidation of the role of the surface pressure in the complexation and visualization of the interfacial aggregates for the first time. We demonstrate that the DNA complexes with negatively charged model monolayers (DPPC/DPPS 4 : 1) only in the presence of Ca(2+), but is expelled at very high surface pressures. Also, according to the Gibbs elasticity plot, the complexation of lipids and DNA implies a whole fluidisation of the monolayer and a completely different phase transition map in the presence of DNA and Ca(2+). AFM imaging allows identification for the first time of specific morphologies associated with different packing densities. At low surface coverage, a branched net like structure is observed whereas at high surface pressure fibers formed of interfacial aggregates appear. In summary, Ca(2+) mediates the interaction between DNA and negatively charged lipids and also the conformation of the ternary system depends on the surface pressure. Such observations are important new generic features of the interaction between DNA and anionic lipids.
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Affiliation(s)
- Germán Luque-Caballero
- Department of Applied Physics, University of Granada, Campus de Fuentenueva sn, 18071, Granada, Spain.
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Matharu Z, Bandodkar AJ, Gupta V, Malhotra BD. Fundamentals and application of ordered molecular assemblies to affinity biosensing. Chem Soc Rev 2012; 41:1363-402. [DOI: 10.1039/c1cs15145b] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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The effect of underlying octadecylamine monolayer on the DNA conformation on the graphite surface. Colloids Surf B Biointerfaces 2010; 76:63-9. [DOI: 10.1016/j.colsurfb.2009.10.011] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2009] [Revised: 09/25/2009] [Accepted: 10/08/2009] [Indexed: 11/19/2022]
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Shifrina ZB, Kuchkina NV, Rutkevich PN, Vlasik TN, Sushko AD, Izumrudov VA. Water-Soluble Cationic Aromatic Dendrimers and Their Complexation with DNA. Macromolecules 2009. [DOI: 10.1021/ma901378t] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zinaida B. Shifrina
- A.N.Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov st., 28, Moscow, 119991 Russia
| | - Nina V. Kuchkina
- A.N.Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov st., 28, Moscow, 119991 Russia
| | - Pavel N. Rutkevich
- Federal State Institution (FSI) Russian Cardiology Research-Industrial Complex, Russian Ministry of Health, 3 Cherepkovskaya st., 15a, Moscow, 121552 Russia
| | - Tatyana N. Vlasik
- Federal State Institution (FSI) Russian Cardiology Research-Industrial Complex, Russian Ministry of Health, 3 Cherepkovskaya st., 15a, Moscow, 121552 Russia
| | - Anna D. Sushko
- M.V. Lomonosov Moscow State University, Chemistry Department, Leninsky Gory, Moscow, 119991 Russia
| | - Vladimir A. Izumrudov
- M.V. Lomonosov Moscow State University, Chemistry Department, Leninsky Gory, Moscow, 119991 Russia
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Davies ML, Burrows HD, Cheng S, Morán MC, Miguel MDG, Douglas P. Cationic Fluorene-Based Conjugated Polyelectrolytes Induce Compaction and Bridging in DNA. Biomacromolecules 2009; 10:2987-97. [DOI: 10.1021/bm9004996] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Matthew L. Davies
- Departamento de Química, Universidade de Coimbra, Rua Larga, 3004-535 Coimbra, Portugal, and Chemistry Group, School of Engineering, and Multidisciplinary Nanotechnology Centre, School of Engineering, Swansea University, Singleton Park, Swansea, SA2 8PP, United Kingdom
| | - Hugh D. Burrows
- Departamento de Química, Universidade de Coimbra, Rua Larga, 3004-535 Coimbra, Portugal, and Chemistry Group, School of Engineering, and Multidisciplinary Nanotechnology Centre, School of Engineering, Swansea University, Singleton Park, Swansea, SA2 8PP, United Kingdom
| | - Shuying Cheng
- Departamento de Química, Universidade de Coimbra, Rua Larga, 3004-535 Coimbra, Portugal, and Chemistry Group, School of Engineering, and Multidisciplinary Nanotechnology Centre, School of Engineering, Swansea University, Singleton Park, Swansea, SA2 8PP, United Kingdom
| | - M. Carmen Morán
- Departamento de Química, Universidade de Coimbra, Rua Larga, 3004-535 Coimbra, Portugal, and Chemistry Group, School of Engineering, and Multidisciplinary Nanotechnology Centre, School of Engineering, Swansea University, Singleton Park, Swansea, SA2 8PP, United Kingdom
| | - Maria da Graça Miguel
- Departamento de Química, Universidade de Coimbra, Rua Larga, 3004-535 Coimbra, Portugal, and Chemistry Group, School of Engineering, and Multidisciplinary Nanotechnology Centre, School of Engineering, Swansea University, Singleton Park, Swansea, SA2 8PP, United Kingdom
| | - Peter Douglas
- Departamento de Química, Universidade de Coimbra, Rua Larga, 3004-535 Coimbra, Portugal, and Chemistry Group, School of Engineering, and Multidisciplinary Nanotechnology Centre, School of Engineering, Swansea University, Singleton Park, Swansea, SA2 8PP, United Kingdom
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