Hyaluronic Acid Surface Modified Liposomes Prepared via Orthogonal Aminoxy Coupling: Synthesis of Nontoxic Aminoxylipids Based on Symmetrically α-Branched Fatty Acids, Preparation of Liposomes by Microfluidic Mixing, and Targeting to Cancer Cells Expressing CD44

Bioconjug Chem. 2018 Jul 18;29(7):2343-2356. doi: 10.1021/acs.bioconjchem.8b00311. Epub 2018 Jun 25.

Abstract

New synthetic aminoxy lipids are designed and synthesized as building blocks for the formulation of functionalized nanoliposomes by microfluidization using a NanoAssemblr. Orthogonal binding of hyaluronic acid onto the outer surface of functionalized nanoliposomes via aminoxy coupling ( N-oxy ligation) is achieved at hemiacetal function of hyaluronic acid and the structure of hyaluronic acid-liposomes is visualized by transmission electron microscopy and cryotransmission electron microscopy. Observed structures are in a good correlation with data obtained by dynamic light scattering (size and ζ-potential). In vitro experiments on cell lines expressing CD44 receptors demonstrate selective internalization of fluorochrome-labeled hyaluronic acid-liposomes, while cells with down regulated CD44 receptor levels exhibit very low internalization of hyaluronic acid-liposomes. A method based on microfluidization mixing was developed for preparation of monodispersive unilamellar liposomes containing aminoxy lipids and orthogonal binding of hyaluronic acid onto the liposomal surface was demonstrated. These hyaluronic acid-liposomes represent a potentially new drug delivery platform for CD44-targeted anticancer drugs as well as for immunotherapeutics and vaccines.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Antineoplastic Agents / administration & dosage*
  • Cell Line
  • Drug Delivery Systems / methods*
  • Endocytosis
  • Fluorescent Dyes
  • Humans
  • Hyaluronan Receptors / analysis
  • Hyaluronan Receptors / metabolism*
  • Hyaluronic Acid / chemistry*
  • Hyaluronic Acid / metabolism
  • Lipids / chemical synthesis*
  • Liposomes / chemistry*
  • Liposomes / therapeutic use
  • Microfluidics
  • Microscopy, Electron, Transmission
  • Neoplasms / drug therapy

Substances

  • Antineoplastic Agents
  • CD44 protein, human
  • Fluorescent Dyes
  • Hyaluronan Receptors
  • Lipids
  • Liposomes
  • Hyaluronic Acid