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Tedeschi V, Paldino G, Alba J, Molteni E, Paladini F, Scrivo R, Congia M, Cauli A, Caccavale R, Paroli M, Di Franco M, Tuosto L, Sorrentino R, D’Abramo M, Fiorillo MT. ERAP1 and ERAP2 Haplotypes Influence Suboptimal HLA-B*27:05-Restricted Anti-Viral CD8+ T Cell Responses Cross-Reactive to Self-Epitopes. Int J Mol Sci 2023; 24:13335. [PMID: 37686141 PMCID: PMC10488187 DOI: 10.3390/ijms241713335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 08/22/2023] [Accepted: 08/25/2023] [Indexed: 09/10/2023] Open
Abstract
The human leukocyte antigen (HLA)-B*27 family of alleles is strongly associated with ankylosing spondylitis (AS), a chronic inflammatory disorder affecting the axial and peripheral joints, yet some HLA-B*27 variants not associated with AS have been shown. Since no major differences in the ligandome of associated compared to not-associated alleles have emerged, a plausible hypothesis is that the quantity rather than the quality of the presented epitopes makes the difference. In addition, the Endoplasmic Reticulum AminoPeptidases (ERAPs) 1 and 2, playing a crucial role in shaping the HLA class I epitopes, act as strong AS susceptibility factors, suggesting that an altered peptidome might be responsible for the activation of pathogenic CD8+ T cells. In this context, we have previously singled out a B*27:05-restricted CD8+ T cell response against pEBNA3A (RPPIFIRRL), an EBV peptide lacking the B*27 classic binding motif. Here, we show that a specific ERAP1/2 haplotype negatively correlates with such response in B*27:05 subjects. Moreover, we prove that the B*27:05 allele successfully presents peptides with the same suboptimal N-terminal RP motif, including the self-peptide, pDYNEIN (RPPIFGDFL). Overall, this study underscores the cooperation between the HLA-B*27 and ERAP1/2 allelic variants in defining CD8+ T cell reactivity to suboptimal viral and self-B*27 peptides and prompts further investigation of the B*27:05 peptidome composition.
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Affiliation(s)
- Valentina Tedeschi
- Department of Biology and Biotechnologies “Charles Darwin”, Sapienza University of Rome, 00185 Rome, Italy; (G.P.); (L.T.); (R.S.); (M.T.F.)
| | - Giorgia Paldino
- Department of Biology and Biotechnologies “Charles Darwin”, Sapienza University of Rome, 00185 Rome, Italy; (G.P.); (L.T.); (R.S.); (M.T.F.)
| | - Josephine Alba
- Department of Biology, University of Fribourg, Chemin du Musée, 1700 Fribourg, Switzerland;
| | - Emanuele Molteni
- Rheumatology Unit, Department of Clinical Internal, Anaesthesiological and Cardiovascular Sciences, Policlinico Umberto I, Sapienza University of Rome, 00161 Rome, Italy; (E.M.); (R.S.); (M.D.F.)
| | - Fabiana Paladini
- Department of Biology and Biotechnologies “Charles Darwin”, Sapienza University of Rome, 00185 Rome, Italy; (G.P.); (L.T.); (R.S.); (M.T.F.)
| | - Rossana Scrivo
- Rheumatology Unit, Department of Clinical Internal, Anaesthesiological and Cardiovascular Sciences, Policlinico Umberto I, Sapienza University of Rome, 00161 Rome, Italy; (E.M.); (R.S.); (M.D.F.)
| | - Mattia Congia
- Rheumatology Unit, AOU and University of Cagliari, 09042 Monserrato, Italy; (M.C.); (A.C.)
| | - Alberto Cauli
- Rheumatology Unit, AOU and University of Cagliari, 09042 Monserrato, Italy; (M.C.); (A.C.)
| | - Rosalba Caccavale
- Department of Biotechnology and Medical Surgical Sciences, Division of Clinical Immunology and Rheumatology, Sapienza University of Rome c/o Polo Pontino, 04100 Latina, Italy; (R.C.); (M.P.)
| | - Marino Paroli
- Department of Biotechnology and Medical Surgical Sciences, Division of Clinical Immunology and Rheumatology, Sapienza University of Rome c/o Polo Pontino, 04100 Latina, Italy; (R.C.); (M.P.)
| | - Manuela Di Franco
- Rheumatology Unit, Department of Clinical Internal, Anaesthesiological and Cardiovascular Sciences, Policlinico Umberto I, Sapienza University of Rome, 00161 Rome, Italy; (E.M.); (R.S.); (M.D.F.)
| | - Loretta Tuosto
- Department of Biology and Biotechnologies “Charles Darwin”, Sapienza University of Rome, 00185 Rome, Italy; (G.P.); (L.T.); (R.S.); (M.T.F.)
| | - Rosa Sorrentino
- Department of Biology and Biotechnologies “Charles Darwin”, Sapienza University of Rome, 00185 Rome, Italy; (G.P.); (L.T.); (R.S.); (M.T.F.)
| | - Marco D’Abramo
- Department of Chemistry, Sapienza University of Rome, 00185 Rome, Italy
| | - Maria Teresa Fiorillo
- Department of Biology and Biotechnologies “Charles Darwin”, Sapienza University of Rome, 00185 Rome, Italy; (G.P.); (L.T.); (R.S.); (M.T.F.)
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