Targeted intracellular delivery of resveratrol to glioblastoma cells using apolipoprotein E-containing reconstituted HDL as a nanovehicle

PLoS One. 2015 Aug 10;10(8):e0135130. doi: 10.1371/journal.pone.0135130. eCollection 2015.

Abstract

The objective of this study is to transport and deliver resveratrol to intracellular sites using apolipoprotein E3 (apoE3). Reconstituted high-density lipoprotein (rHDL) bearing resveratrol (rHDL/res) was prepared using phospholipids and the low-density lipoprotein receptor (LDLr)-binding domain of apoE3. Biophysical characterization revealed that resveratrol was partitioned into the phospholipid bilayer of discoidal rHDL/res particles (~19 nm diameter). Co-immunoprecipitation studies indicated that the LDLr-binding ability of apoE3 was retained. Cellular uptake of resveratrol to intracellular sites was evaluated in glioblastoma A-172 cells by direct fluorescence using chemically synthesized NBD-labeled resveratrol (res/NBD) embedded in rHDL/res. Competition and inhibition studies indicate that the uptake is by receptor mediated endocytosis via the LDLr, with co-localization of apoE3 and res/NBD in late endosomes/lysosomes. We propose that rHDL provides an ideal hydrophobic milieu to sequester resveratrol and that rHDL containing apoE3 serves as an effective "nanovehicle" to transport and deliver resveratrol to targeted intracellular sites.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Antineoplastic Agents, Phytogenic / metabolism
  • Antineoplastic Agents, Phytogenic / pharmacology*
  • Apolipoprotein E3 / chemistry
  • Apolipoprotein E3 / metabolism*
  • Azoles
  • Cell Line, Tumor
  • Drug Delivery Systems / methods*
  • Endocytosis
  • Endosomes / drug effects
  • Endosomes / metabolism*
  • Fluorescent Dyes
  • Humans
  • Hydrophobic and Hydrophilic Interactions
  • Lipoproteins, HDL / chemistry
  • Lipoproteins, HDL / metabolism
  • Neuroglia / drug effects*
  • Neuroglia / metabolism
  • Neuroglia / pathology
  • Nitrobenzenes
  • Particle Size
  • Protein Structure, Tertiary
  • Receptors, LDL / chemistry
  • Receptors, LDL / metabolism
  • Resveratrol
  • Staining and Labeling / methods
  • Stilbenes / metabolism
  • Stilbenes / pharmacology*

Substances

  • 7-nitrobenz-2-oxa-1,3-diazol-4-yl
  • Antineoplastic Agents, Phytogenic
  • Apolipoprotein E3
  • Azoles
  • Fluorescent Dyes
  • Lipoproteins, HDL
  • Nitrobenzenes
  • Receptors, LDL
  • Stilbenes
  • Resveratrol