Polymer-stabilized phospholipid vesicles with a controllable, pH-dependent disassembly mechanism

David L. Roberts, Yaning Ma, Steven E. Bowles, Colleen M. Janczak, Dong-Chul Pyun, Steven S Saavedra, Craig A Aspinwall

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

In this letter, we report a facile method to prepare robust phospholipid vesicles using commonly available phospholipids that are stabilized via the formation of an interpenetrating, acid-labile, cross-linked polymer network that imparts a site for controlled polymer destabilization and subsequent vesicle degradation. The polymer network was formed in the inner lamella of the phospholipid bilayer using 2,2-di(methacryloyloxy-1-ethoxy)propane (DMOEP) and butyl methacrylate (BMA). Upon exposure to acidic conditions, the highly cross-linked polymer network was partially converted to smaller linear polymers, resulting in substantially reduced vesicle stability upon exposure to chemical and physical insults. Isolated polymers had pH-dependent-solubility in THF. Transmission electron microscopy and dynamic light scattering revealed time-dependent enhanced vesicle stability in high concentrations of surfactant and vacuum conditions at elevated pH, whereas exposure to acidic pH rapidly decreased the vesicle stability, with complete destabilization observed in less than 24 h. The resultant transiently stabilized vesicles may prove useful for enhanced drug delivery and chemical sensing applications and allow for improved physiological clearance.

Original languageEnglish (US)
Pages (from-to)1908-1910
Number of pages3
JournalLangmuir
Volume25
Issue number4
DOIs
StatePublished - Feb 17 2009

Fingerprint

Phospholipids
Polymers
polymers
destabilization
Propane
clearances
Dynamic light scattering
lamella
Drug delivery
Surface-Active Agents
propane
delivery
drugs
Surface active agents
light scattering
solubility
Solubility
surfactants
Vacuum
degradation

ASJC Scopus subject areas

  • Electrochemistry
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Materials Science(all)
  • Spectroscopy

Cite this

Polymer-stabilized phospholipid vesicles with a controllable, pH-dependent disassembly mechanism. / Roberts, David L.; Ma, Yaning; Bowles, Steven E.; Janczak, Colleen M.; Pyun, Dong-Chul; Saavedra, Steven S; Aspinwall, Craig A.

In: Langmuir, Vol. 25, No. 4, 17.02.2009, p. 1908-1910.

Research output: Contribution to journalArticle

Roberts, David L. ; Ma, Yaning ; Bowles, Steven E. ; Janczak, Colleen M. ; Pyun, Dong-Chul ; Saavedra, Steven S ; Aspinwall, Craig A. / Polymer-stabilized phospholipid vesicles with a controllable, pH-dependent disassembly mechanism. In: Langmuir. 2009 ; Vol. 25, No. 4. pp. 1908-1910.
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