Characterization of cationic liposomes based on dimethyldioctadecylammonium and synthetic cord factor from M. tuberculosis (trehalose 6,6'-dibehenate)-a novel adjuvant inducing both strong CMI and antibody responses

Jesper Davidsen, Ida Rosenkrands, Dennis Christensen, Anil Vangala, Daniel Kirby, Yvonne Perrie, Else Marie Agger, Peter Andersen

Research output: Contribution to journalArticlepeer-review

253 Citations (Scopus)


Incorporation of the glycolipid trehalose 6,6'-dibehenate (TDB) into cationic liposomes composed of the quaternary ammonium compound dimethyldioctadecylammonium (DDA) produce an adjuvant system which induces a powerful cell-mediated immune response and a strong antibody response, desirable for a high number of disease targets. We have used differential scanning calorimetry (DSC) to investigate the effect of TDB on the gel-fluid phase transition of DDA liposomes and to demonstrate that TDB is incorporated into DDA liposome bilayers. Transmission Electron Microscopy (TEM) and cryo-TEM confirmed that liposomes were formed when a lipid film of DDA containing small amounts of TDB was hydrated in an aqueous buffer solution at physiological pH. Furthermore, time development of particle size and zeta potential of DDA liposomes incorporating TDB during storage at 4 degrees C and 25 degrees C, indicates that TDB effectively stabilizes the DDA liposomes. Immunization of mice with the mycobacterial fusion protein Ag85B-ESAT-6 in DDA-TDB liposomes induced a strong, specific Th1 type immune response characterized by substantial production of the interferon-gamma cytokine and high levels of IgG2b isotype antibodies. The lymphocyte subset releasing the interferon-gamma was identified as CD4 T cells.

Original languageEnglish
Pages (from-to)22-31
Number of pages10
JournalBBA - Biochimica et Biophysica Acta
Issue number1-2
Publication statusPublished - 10 Dec 2005


  • acyltransferases
  • adjuvants, immunologic
  • liposomes
  • antibody formation
  • bacterial antigens
  • bacterial proteins

Cite this