Lipid phase control of DNA delivery

Rumiana Koynova*, Li Wang, Yury Tarahovsky, Robert C. MacDonald

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

63 Scopus citations


Cationic lipids form nanoscale complexes (lipoplexes) with polyanionic DNA and can be utilized to deliver DNA to cells for transfection. Here we report the correlation between delivery efficiency of these DNA carriers and the mesomorphic phases they form when interacting with anionic membrane lipids. Specifically, formulations that are particularly effective DNA carriers form phases of highest negative interfacial curvature when mixed with anionic lipids, whereas less effective formulations form phases of lower curvature. Structural evolution of the carrier lipid/DNA complexes upon interaction with cellular lipids is hence suggested as a controlling factor in lipid-mediated DNA delivery. A strategy for optimizing lipofection is deduced. The behavior of a highly effective lipoplex formulation, DOTAP/DOPE, is found to conform to this "efficiency formula".

Original languageEnglish (US)
Pages (from-to)1335-1339
Number of pages5
JournalBioconjugate Chemistry
Issue number6
StatePublished - 2005

ASJC Scopus subject areas

  • Bioengineering
  • Biotechnology
  • Biomedical Engineering
  • Pharmacology
  • Pharmaceutical Science
  • Organic Chemistry


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