Development of α-GalCer Analogues with an α-Fluorocarbonyl Moiety as Th2-Selective Ligands of CD1d
2019
A series of α-GalCer analogues containing an α-fluorocarbonyl moiety at the terminal position of the acyl chain were designed for targeting polar residues in the hydrophobic cavity of CD1d using a structure-based approach. The acyl chain length was efficiently adjusted by an asymmetric alkyne–alkyne cross coupling strategy, and the newly synthesized α-GalCer analogues showed the high Th2-selective activity of iNKT cells. The biased activity of ligands could be caused by the hydrogen-bonding interaction between ligands and CD1d according to the Th2-selective cytokine secretion and molecular docking studies.
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