title: Atomic force microscopy as a tool to study the adsorption of DNA onto lipid interfaces.
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.
authors.affiliation: Departamento de Física Aplicada, Universidad de Granada, Campus de Fuentenueva sn, Granada, 18071, Spain.
authors.forename: Germán
authors.initials: G
authors.lastname: Luque-Caballero
authors.affiliation: Departamento de Física Aplicada, Universidad de Granada, Campus de Fuentenueva sn, Granada, 18071, Spain.
authors.forename: Julia
authors.initials: J
authors.lastname: Maldonado-Valderrama
authors.affiliation: Departamento de Física, Escuela Politécnica Superior de Linares, Universidad de Jaén, Linares, Jaén, 23700, Spain.
authors.forename: Manuel
authors.initials: M
authors.lastname: Quesada-Pérez
authors.affiliation: Departamento de Física Aplicada, Universidad de Granada, Campus de Fuentenueva sn, Granada, 18071, Spain.
authors.forename: Alberto
authors.initials: A
authors.lastname: Martín-Molina
mesh_terms: D015060:1,2-Dipalmitoylphosphatidylcholine / Q000737:chemistry; D000327:Adsorption; D004247:DNA / Q000737:chemistry*; D018014:Gene Transfer Techniques; D015316:Genetic Therapy; D008055:Lipids / Q000737:chemistry*; D018625:Microscopy, Atomic Force; D036103:Nanotechnology; D010718:Phosphatidylserines / Q000737:chemistry; D013499:Surface Properties
chemical_list: D008055:Lipids; D010718:Phosphatidylserines; D015060:1,2-Dipalmitoylphosphatidylcholine; C038694:dipalmitoylphosphatidylserine; D004247:DNA
keywords: DNA; atomic force microscopy; cations; charge inversion; lipid