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Self-assembly of size-controlled liposomes on DNA nanotemplates
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Journal Article
Self-assembly of size-controlled liposomes on DNA nanotemplates
2016
Overview
Artificial lipid-bilayer membranes are valuable tools for the study of membrane structure and dynamics. For applications such as the study of vesicular transport and drug delivery, there is a pressing need for artificial vesicles with controlled size. However, controlling vesicle size and shape with nanometre precision is challenging, and approaches to achieve this can be heavily affected by lipid composition. Here, we present a bio-inspired templating method to generate highly monodispersed sub-100-nm unilamellar vesicles, where liposome self-assembly was nucleated and confined inside rigid DNA nanotemplates. Using this method, we produce homogeneous liposomes with four distinct predefined sizes. We also show that the method can be used with a variety of lipid compositions and probe the mechanism of templated liposome formation by capturing key intermediates during membrane self-assembly. The DNA nanotemplating strategy represents a conceptually novel way to guide lipid bilayer formation and could be generalized to engineer complex membrane/protein structures with nanoscale precision.
Precise control of vesicle size is highly desirable both for basic biochemical research and biomedical applications. Now, monodispersed sub-100-nm vesicles with predefined sizes have been produced using a method based on membrane self-assembly within a DNA-nanostructure guide.
Publisher
Nature Publishing Group UK,Nature Publishing Group
