Structure-Property Relationships of Amphiphilic Nanoparticles That Penetrate or Fuse Lipid Membranes

Bioconjugate Chemistry
Prabhani U AtukoraleDarrell J Irvine

Abstract

The development of synthetic nanomaterials that could embed within, penetrate, or induce fusion between membranes without permanent disruption would have great significance for biomedical applications. Here we describe structure-function relationships of highly water-soluble gold nanoparticles comprised of an ∼1.5-5 nm diameter metal core coated by an amphiphilic organic ligand shell, which exhibit membrane embedding and fusion activity mediated by the surface ligands. Using an environment-sensitive dye anchored within the ligand shell as a sensor of membrane embedding, we demonstrate that particles with core sizes of ∼2-3 nm are capable of embedding within and penetrating fluid bilayers. At the nanoscale, these particles also promote spontaneous fusion of liposomes or spontaneously embed within intact liposomal vesicles. These studies provide nanoparticle design and selection principles that could be used in drug delivery applications, as membrane stains, or for the creation of novel organic/inorganic nanomaterial self-assemblies.

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Citations

Nov 26, 2019·Small·Asaf GrupiShimon Weiss
Jul 22, 2020·Proceedings of the National Academy of Sciences of the United States of America·Mukarram A TahirAlfredo Alexander-Katz
Mar 23, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Anurag ChaudhuryJaydeep Kumar Basu
Sep 2, 2021·The Journal of Physical Chemistry Letters·Ester CanepaAnnalisa Relini

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