A CD1d-dependent Antagonist Inhibits the Activation of Invariant NKT Cells and Prevents Development of Allergen-induced Airway Hyperreactivity
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The prevalence of asthma continues to increase in westernized countries, and optimal treatment remains a significant therapeutic challenge. Recently, CD1d-restricted invariant NKT (iNKT) cells were found to play a critical role in the induction of airway hyperreactivity (AHR) in animal models and are associated with asthma in humans. To test whether iNKT cell-targeted therapy could be used to treat allergen-induced airway disease, mice were sensitized with OVA and treated with di-palmitoyl-phosphatidyl-ethanolamine polyethylene glycol (DPPE-PEG), a CD1d-binding lipid antagonist. A single dose of DPPE-PEG prevented the development of AHR and pulmonary infiltration of lymphocytes upon OVA challenge, but had no effect on the development of OVA-specific Th2 responses. In addition, DPPE-PEG completely prevented the development of AHR after administration of alpha-galactosylceramide (alpha-GalCer) intranasally. Furthermore, we demonstrate that DPPE-PEG acts as antagonist to alpha-GalCer and competes with alpha-GalCer for binding to CD1d. Finally, we show that DPPE-PEG completely inhibits the alpha-GalCer-induced phosphorylation of ERK tyrosine kinase in iNKT cells, suggesting that DPPE-PEG specifically blocks TCR signaling and thus activation of iNKT cells. Because iNKT cells play a critical role in the development of AHR, the inhibition of iNKT activation by DPPE-PEG suggests a novel approach to treat iNKT cell-mediated diseases such as asthma.
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Kim S, Cho S, Kim J Exp Mol Med. 2023; 55(9):1858-1871.
PMID: 37696897 PMC: 10545705. DOI: 10.1038/s12276-023-01053-6.
Bansal P, Singh N, Joshi J, Arora N, Gaur S Curr Res Pharmacol Drug Discov. 2022; 3:100109.
PMID: 35707627 PMC: 9188963. DOI: 10.1016/j.crphar.2022.100109.
Park H, Kim T, Park Y, Lee S, Jeon J, Park S Biomedicines. 2021; 9(11).
PMID: 34829848 PMC: 8615984. DOI: 10.3390/biomedicines9111619.
Lai A, Chi P, Thio C, Han Y, Kao H, Hsieh H Front Chem. 2019; 7:811.
PMID: 31850305 PMC: 6893574. DOI: 10.3389/fchem.2019.00811.