Preparation, characterisation and entrapment of a non-glycosidic threitol ceramide into liposomes for presentation to invariant natural killer T cells

Randip Kaur, Jili Chen, Amina Dawoodji, Vincenzo Cerundolo, Yoel R. Garcia-Diaz, Justyna Wojno, Liam R. Cox, Gurdyal S. Besra, Behfar Moghaddam, Yvonne Perrie

Research output: Contribution to journalArticle

Abstract

Dendritic cells (DCs) are able to present glycolipids to invariant natural killer T (iNKT) cells in vivo. Very few compounds have been found to stimulate iNKT cells, and of these, the best characterised is the glycolipid a-galactosylceramide, which stimulates the production of large quantities of interferon-gamma (IFN-?) and interleukin-4 (IL-4). However, aGalCer leads to overstimulation of iNKT cells. It has been demonstrated that the aGalCer analogue, threitol ceramide (ThrCer 2), successfully activates iNKT cells and overcomes the problematic iNKT cell activation-induced anergy. In this study, ThrCer 2 has been inserted into the bilayers of liposomes composed of a neutral lipid, 1,2-distearoyl-sn-glycero-3-phosphocholine (DSPC), or dimethyldioctadecylammonium bromide (DDA), a cationic lipid. Incorporation efficiencies of ThrCer within the liposomes was 96% for DSPC liposomes and 80% for DDA liposomes, with the vesicle size (large multilamellar vs. small unilamellar vesicles) making no significant difference. Langmuir-Blodgett studies suggest that both DSPC and DDA stack within the monolayer co-operatively with the ThrCer molecules with no condensing effect. In terms of cellular responses, IFN-? secretion was higher for cells treated with small DDA liposomes compared with the other liposome formulations, suggesting that ThrCer encapsulation in this liposome formulation resulted in a higher uptake by DCs.
Original languageEnglish
Pages (from-to)2724-2733
Number of pages10
JournalJournal of Pharmaceutical Sciences
Volume100
Issue number7
Early online date31 Jan 2011
DOIs
Publication statusPublished - Jul 2011

Bibliographical note

© 2011, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/

Keywords

  • immunologic adjuvant
  • cultured cells
  • pharmaceutical chemistry
  • dendritic cells
  • drug compounding
  • drug stability
  • galactosylceramides
  • humans
  • interferon-gamma
  • natural killer cells
  • kinetics
  • liposomes
  • particle size
  • phosphatidylcholines
  • quaternary ammonium compounds
  • solubility
  • sugar alcohols
  • pharmaceutical technology

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    Kaur, R., Chen, J., Dawoodji, A., Cerundolo, V., Garcia-Diaz, Y. R., Wojno, J., Cox, L. R., Besra, G. S., Moghaddam, B., & Perrie, Y. (2011). Preparation, characterisation and entrapment of a non-glycosidic threitol ceramide into liposomes for presentation to invariant natural killer T cells. Journal of Pharmaceutical Sciences, 100(7), 2724-2733. https://doi.org/10.1002/jps.22500