Abstract |
A number of autoimmune diseases are associated with the genotypes of human leukocyte antigen class II (HLA), some of which present peptides derived from self- proteins, resulting in clonal expansion of self-reactive T cells. Therefore, selective inhibition of self- peptide loading onto such disease-associated HLA could ameliorate the diseases. To effectively identify such compounds, in this study, we established, for the first time, a cell- and 96-well microplate-based high-throughput screening system for inhibitors of antigen presentation. A panel of DRB1 genes plus DRA*01:01 gene were expressed in HEK293T cells and in 3T3 cells, and their binding with biotinylated known self-antigen peptides was measured by flow cytometry. HLA-DR1 (DRB1*01:01) and DR15 (DRB1*15:01) showed a high affinity with myelin basic protein peptide (MBP83-98). Therefore, in 96-well plate wells, MBP83-99 was allowed to bind to DR1 or DR15 on 3T3 cells in competition with a test compound, and the HLA-bound peptide was detected by streptavidin-conjugated β- galactosidase, thereby identifying inhibitor compounds for rheumatoid arthritis or multiple sclerosis. Our assay system has a potential for broad applications, including designing peptide vaccines.
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Authors | Nobuo Watanabe, Yusuke Suzuki, Takahisa Yonezu, Yuki Nakagawa, Takashi Shiina, Noriaki Hirayama, Sadaki Inokuchi, Shigeaki Inoue |
Journal | Scientific reports
(Sci Rep)
Vol. 7
Issue 1
Pg. 6798
(07 28 2017)
ISSN: 2045-2322 [Electronic] England |
PMID | 28754892
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- Autoantigens
- HLA-DRB1 Chains
- Myelin Basic Protein
- Peptides
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Topics |
- 3T3 Cells
- Animals
- Antigen Presentation
- Autoantigens
(immunology)
- HEK293 Cells
- HLA-DRB1 Chains
(immunology)
- High-Throughput Screening Assays
(methods)
- Humans
- Mice
- Myelin Basic Protein
(immunology)
- Peptides
(immunology)
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