Characterization of the main phase transition in 1,2-dipalmitoyl-phosphatidylcholine LUVs by 1H NMR

Anthony Kennedy, Peter J. Hmel, Joseph Seelbaugh, John G. Quiles, Rickey Hicks, Thomas J. Reid

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

The main phase transition (Tm) of 100nm large unilamellar vesicles (LUVs) of 1,2-dipalmitoylphosphatidylcholine (DPPC) was investigated using 1HNMR (proton magnetic resonance) in deuterium oxide, and both DSC (differential scanning calorimetry) and IR (infrared) spectroscopy in water and deuterium oxide. The ability of 1H NMR to determine Tm was demonstrated and the values obtained were in general agreement with those observed with DSC and IR. However, the temperature range of the transition observed by NMR was significantly broader than that observed with either DSC or IR. The effect of deuterium oxide on Tm was studied by comparing results obtained in water and deuterium oxide with DSC and IR. The results showed no significant difference in Tm or temperature range of transition determined in these solvents.

Original languageEnglish (US)
Pages (from-to)221-237
Number of pages17
JournalJournal of Liposome Research
Volume12
Issue number3
DOIs
StatePublished - Dec 12 2002

Keywords

  • Membrane
  • NMR
  • Phase transition

ASJC Scopus subject areas

  • Pharmaceutical Science

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