Distinct trajectories distinguish antigen-specific T cells in peanut-allergic individuals undergoing oral immunotherapy - 05/07/23

IMPACT
Graphical abstract |
Abstract |
Background |
Despite similar clinical symptoms, peanut-allergic (PA) individuals may respond quite differently to the same therapeutic interventions.
Objective |
This study aimed to determine whether inherent qualities of cell response at baseline could influence response to peanut oral immunotherapy (PnOIT).
Methods |
We first performed ex vivo T-cell profiling on peanut-reactive CD154+CD137+ T (pTeff) cells from 90 challenge-confirmed PA individuals. We developed a gating strategy for unbiased assessment of the phenotypic distribution of rare pTeff cells across different memory CD4+ T-cell subsets to define patient immunotype. In longitudinal samples of 29 PA participants enrolled onto the IMPACT trial of PnOIT, we determined whether patient immunotype at baseline could influence response to PnOIT.
Results |
Our data emphasize the heterogeneity of pTeff cell responses in PA participants with 2 mutually exclusive phenotypic entities (CCR6−CRTH2+ and CCR6+CRTH2−). Our findings lead us to propose that peanut allergy can be classified broadly into at least 2 discrete subtypes, termed immunotypes, with distinct immunologic and clinical characteristics that are based on the proportion of TH2A pTeff cells. PnOIT induced elimination of TH2A pTeff cells in the context of the IMPACT clinical trial. Only 1 PA patient with a low level of TH2A pTeff cells at baseline experienced long-lasting benefit of remission after PnOIT discontinuation.
Conclusion |
Dividing PA patients according to their individual peanut-specific T-cell profile may facilitate patient stratification in clinical settings by identifying which immunotypes might respond best to different therapies.
Le texte complet de cet article est disponible en PDF.Key words : CD4+ T cells, oral immunotherapy, immunotype, peanut allergy, TH2A cells, IMPACT trial
Abbreviations used : CRTH2, DBPCFC, PA, PBMC, PnOIT, ps, pTeff, RNA-Seq, SPT, TCR, Tfh, TH2A, TH2conv
Plan
| This research was performed as a project of the Immune Tolerance Network and was supported by the US National Institutes of Health (NIH), National Institute of Allergy and Infectious Diseases (awards UM1AI109565 and U19 AI135817 E.W. and W.W.K.). The Seattle Food Allergy Consortium (SeaFAC) and the Food Allergy Research and Education (FARE) contributed supplemental support to the Wambre laboratory. Astellas Pharma provided support to the Benaroya Research Institute for experiments on samples from Astellas’s clinical trial. The content is solely the responsibility of the authors and does not necessarily represent the official views of the NIH. |
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| Disclosure of potential conflict of interest: E. Wambre receives grant support from the National Institute of Allergy and Infectious Diseases, the National Cancer Institute, FARE, and the Immune Tolerance Network, as well as research sponsorship from Regeneron Pharmaceuticals, Astellas Pharma, COUR Pharma, and Aimmune Therapeutics. B. C. Ferslew, T. Zhu, R. Smulders, and G. R. Chichili are full-time employees of Astellas and hold stock or stock options. D. C. Adelman is a former employee of Aimmune Therapeutics and currently chairs the company’s scientific advisory board. The rest of the authors declare that they have no relevant conflicts of interest. |
Vol 152 - N° 1
P. 155 - juillet 2023 Retour au numéroBienvenue sur EM-consulte, la référence des professionnels de santé.
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