title: One-Photon Lithography for High-Quality Lipid Bilayer Micropatterns.
abstract: A relevant question in cell biology with broad implications in biomedicine is how the organization and dynamics of interacting membranes modulate signaling cascades that involve cell-cell contact. The functionalization of surfaces with supported lipid bilayers containing tethered proteins is a particularly useful method to present ligands with membrane-like mobility to cells. Here, we present a method to generate micrometer-sized patches of lipid bilayers decorated with proteins. The method uses an economic microcontact printing technique based on one-photon lithography that can be easily implemented in a commercial laser scanning microscope. We verified that both proteins and lipids freely diffuse within the patterned bilayer, as assessed by z-scan fluorescence correlation spectroscopy and fluorescence recovery after photobleaching. These results suggest that the supported lipid bilayer patterns constitute an optimal system to explore processes involving direct interactions between cells. We also illustrate possible applications of this method by exploring the interaction of cells expressing the Fas receptor and patterns of lipid bilayers containing an agonist antibody against Fas.
authors.affiliation: Instituto de Investigación Médica Mercedes y Martín Ferreyra (INIMEC), CONICET-Universidad Nacional de Córdoba , Friuli 2434, CC389, 5000 Córdoba, Argentina.
authors.forename: M Florencia
authors.initials: MF
authors.lastname: Sánchez
authors.affiliation: Departamento de Química Biológica-IQUIBICEN Facultad de Ciencias Exactas, Universidad de Buenos Aires, Ciudad Universitaria , 1428 Buenos Aires, Argentina.
authors.forename: Martín M
authors.initials: MM
authors.lastname: Dodes Traian
authors.affiliation: Departamento de Química Biológica-IQUIBICEN Facultad de Ciencias Exactas, Universidad de Buenos Aires, Ciudad Universitaria , 1428 Buenos Aires, Argentina.
authors.forename: Valeria
authors.initials: V
authors.lastname: Levi
authors.affiliation: Instituto de Investigación Médica Mercedes y Martín Ferreyra (INIMEC), CONICET-Universidad Nacional de Córdoba , Friuli 2434, CC389, 5000 Córdoba, Argentina.
authors.forename: Dolores C
authors.initials: DC
authors.lastname: Carrer
mesh_terms: D008024:Ligands; D008051:Lipid Bilayers / Q000737:chemistry*; D017785:Photons; D013050:Spectrometry, Fluorescence
chemical_list: D008024:Ligands; D008051:Lipid Bilayers