Involvement of a Rac1-Dependent Macropinocytosis Pathway in Plasmid DNA Delivery by Electrotransfection.

Journal Article (Journal Article)

Electrotransfection is a widely used method for delivering genes into cells with electric pulses. Although different hypotheses have been proposed, the mechanism of electrotransfection remains controversial. Previous studies have indicated that uptake and intracellular trafficking of plasmid DNA (pDNA) are mediated by endocytic pathways, but it is still unclear which pathways are directly involved in the delivery. To this end, the present study investigated the dependence of electrotransfection on macropinocytosis. Data from the study demonstrated that electric pulses induced cell membrane ruffling and actin cytoskeleton remodeling. Using fluorescently labeled pDNA and a macropinocytosis marker (i.e., dextran), the study showed that electrotransfected pDNA co-localized with dextran in intracellular vesicles. Furthermore, electrotransfection efficiency could be decreased significantly by reducing temperature or treatment of cells with a pharmacological inhibitor of Rac1 and could be altered by changing Rac1 activity. Taken together, the findings suggested that electrotransfection of pDNA involved Rac1-dependent macropinocytosis.

Full Text

Duke Authors

Cited Authors

  • Mao, M; Wang, L; Chang, C-C; Rothenberg, KE; Huang, J; Wang, Y; Hoffman, BD; Liton, PB; Yuan, F

Published Date

  • March 2017

Published In

Volume / Issue

  • 25 / 3

Start / End Page

  • 803 - 815

PubMed ID

  • 28129959

Pubmed Central ID

  • PMC5363188

Electronic International Standard Serial Number (EISSN)

  • 1525-0024

International Standard Serial Number (ISSN)

  • 1525-0016

Digital Object Identifier (DOI)

  • 10.1016/j.ymthe.2016.12.009


  • eng