Mak, Jeffrey Y. W., Xu, Weijun, Reid, Robert C., Corbett, Alexandra J., Meehan, Bronwyn S., Wang, Huimeng, Chen, Zhenjun, Rossjohn, Jamie ![]() |
Preview |
PDF
- Published Version
Download (1MB) | Preview |
Abstract
Mucosal-associated invariant T (MAIT) cells are activated by unstable antigens formed by reactions of 5-amino-6-D-ribitylaminouracil (a vitamin B2 biosynthetic intermediate) with glycolysis metabolites such as methylglyoxal. Here we show superior preparations of antigens in dimethylsulfoxide, avoiding their rapid decomposition in water (t1/2 1.5 h, 37 °C). Antigen solution structures, MAIT cell activation potencies (EC50 3–500 pM), and chemical stabilities are described. Computer analyses of antigen structures reveal stereochemical and energetic influences on MAIT cell activation, enabling design of a water stable synthetic antigen (EC50 2 nM). Like native antigens, this antigen preparation induces MR1 refolding and upregulates surface expression of human MR1, forms MR1 tetramers that detect MAIT cells in human PBMCs, and stimulates cytokine expression (IFNγ, TNF) by human MAIT cells. These antigens also induce MAIT cell accumulation in mouse lungs after administration with a co-stimulant. These chemical and immunological findings provide new insights into antigen properties and MAIT cell activation.
Item Type: | Article |
---|---|
Date Type: | Published Online |
Status: | Published |
Schools: | Medicine |
Subjects: | R Medicine > R Medicine (General) |
Publisher: | Nature Publishing Group |
ISSN: | 2041-1723 |
Date of First Compliant Deposit: | 5 June 2017 |
Date of Acceptance: | 16 January 2017 |
Last Modified: | 05 May 2023 04:50 |
URI: | https://orca.cardiff.ac.uk/id/eprint/100000 |
Citation Data
Cited 93 times in Scopus. View in Scopus. Powered By Scopus® Data
Actions (repository staff only)
![]() |
Edit Item |