Journal
EUROPEAN JOURNAL OF MEDICINAL CHEMISTRY
Volume 178, Issue -, Pages 195-213Publisher
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.ejmech.2019.05.069
Keywords
Fluoro GalCer analogues; iNKT activation; Immune response; Modeling study
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Funding
- Pays de Loire Region/University of Nantes for foreign post-doctoral program
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iNKT cells recognize CD1d/alpha-galactosylceramide (alpha-GalCer) complexes via their invariant TCR receptor and stimulate the immune response. Many alpha-GalCer analogues have been investigated to interrogate this interaction. Following our previous work related to the modification of the hydrogen bond network between alpha-GalCer and CD1d, we have now focused our attention on the synthesis of 3-deoxy-3,3-difluoro- and 3,4-dideoxy-3,3,4,4-tetrafluoro-alpha-GalCer analogues, and studied their ability to stimulate human iNKT cells. In each case, deoxygenation at the indicated positions was accompanied by difluoro introduction in order to evaluate the resulting electronic effect on the stability of the ternary CD1 d/Galcer/TCR complex which has been rationalized by modeling study. With deoxy-difluorination at the 3 position, the two epimeric 4-0H analogues were investigated to establish their capacity to compensate for the lack of the hydrogen bond donating group at the 3-position. The 3,4-dideoxytetrafluoro analogue was of interest to highlight the amide NH-bond hydrogen bond properties. (C) 2019 Elsevier Masson SAS. All rights reserved.
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