Article (Scientific journals)
Atypical acute myeloid leukemia-specific transcripts generate shared and immunogenic MHC class-I-associated epitopes
Ehx, Grégory; Larouche, Jean-David; Durette, Chantal et al.
2021In Immunity, 54 (4), p. 737-752
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Abstract :
[en] Acute myeloid leukemia (AML) has not benefited from innovative immunotherapies, mainly because of the lack of actionable immune targets. Using an original proteogenomic approach, we analyzed the major histocompatibility complex class I (MHC class I)-associated immunopeptidome of 19 primary AML samples and identified 58 tumor-specific antigens (TSAs). These TSAs bore no mutations and derived mainly (86%) from supposedly non-coding genomic regions. Two AML-specific aberrations were instrumental in the biogenesis of TSAs, intron retention, and epigenetic changes. Indeed, 48% of TSAs resulted from intron retention and translation, and their RNA expression correlated with mutations of epigenetic modifiers (e.g., DNMT3A). AML TSA-coding transcripts were highly shared among patients and were expressed in both blasts and leukemic stem cells. In AML patients, the predicted number of TSAs correlated with spontaneous expansion of cognate T cell receptor clonotypes, accumulation of activated cytotoxic T cells, immunoediting, and improved survival. These TSAs represent attractive targets for AML immunotherapy.
Disciplines :
Immunology & infectious disease
Author, co-author :
Ehx, Grégory  ;  Université de Liège - ULiège > GIGA I3 - Hematology
Larouche, Jean-David
Durette, Chantal
Laverdure, Jean-Philippe
Hesnard, Leslie
Vincent, Krystel
Hardy, Marie-Pierre
Thériault, Catherine
Rulleau, Caroline
Lanoix, Joël
Bonneil, Eric
Feghaly, Albert
Apavaloaei, Anca
Noronha, Nandita
Laumont, Céline M
Delisle, Jean-Sébastien
Vago, Luca
Hébert, Josée
Sauvageau, Guy
Lemieux, Sébastien
Thibault, Pierre
Perreault, Claude
More authors (12 more) Less
Language :
English
Title :
Atypical acute myeloid leukemia-specific transcripts generate shared and immunogenic MHC class-I-associated epitopes
Publication date :
13 April 2021
Journal title :
Immunity
ISSN :
1074-7613
eISSN :
1097-4180
Publisher :
Cell Press, United States - Massachusetts
Volume :
54
Issue :
4
Pages :
737-752
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 06 May 2021

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