The mechanism of polyplex internalization into cells: Testing the GM1/caveolin-1 lipid raft mediated endocytosis pathway

Rong Qi, Douglas G. Mullen, James R. Baker, Mark M. Banaszak Holl

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28 Citations (Scopus)

Abstract

The GM1/caveolin-1 lipid raft mediated endocytosis mechanism was explored for generation 5 and 7 poly(amidoamine) dendrimer polyplexes employing the Cos-7, 293A, C6, HeLa, KB, and HepG2 cell lines. Expression levels of GM1 and caveolin-1 were measured using dot blot and Western blot, respectively. The level of GM1 in the cell plasma membrane was adjusted by incubation with exogenous GM1 or ganglioside inhibitor PPMP, and the level of CAV-1 was adjusted by upregulation with the adenovirus vector expressed caveolin-1 (AdCav-1). Cholera toxin B subunit was employed as a positive control for uptake in all cases. No evidence was found for a GM1/caveolin-1 lipid raft mediated endocytosis mechanism for the generation 5 and 7 poly(amidoamine) dendrimer polyplexes.

Original languageEnglish
Pages (from-to)267-279
Number of pages13
JournalMolecular Pharmaceutics
Volume7
Issue number1
DOIs
Publication statusPublished - 1 Feb 2010
Externally publishedYes

Keywords

  • Caveolin-1
  • Endocytosis
  • Ganglioside GM1
  • PAMAM dendrimer
  • Polyplexes
  • Transfection

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