Genome sequencing has uncovered an array of recurring somatic mutations in different non-Hodgkin lymphoma (NHL) subtypes. If affecting protein-coding regions, such mutations may yield mutation-derived peptides that may be presented by HLA class I proteins and recognized by cytotoxic T cells. A recurring somatic and oncogenic driver mutation of the Toll-like receptor adaptor protein MYD88, Leu265Pro (L265P) was identified in up to 90% of different NHL subtype patients. We therefore screened the potential of MYD88L265P-derived peptides to elicit cytotoxic T cell responses as tumor-specific neoantigens. Based on in silico predictions, we identified potential MYD88L265P-containing HLA ligands for several HLA class I restrictions. A set of HLA class I MYD88L265P-derived ligands elicited specific cytotoxic T cell responses for HLA-B*07 and -B*15. These data highlight the potential of MYD88L265P mutation-specific peptide-based immunotherapy as a novel personalized treatment approach for patients with MYD88L265P+ NHLs that may complement pharmacological approaches targeting oncogenic MyD88 L265P signaling.

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Keywords Cancer vaccine, HLA ligandome, immunotherapy, MyD88 L265P, neoantigen, non-Hodgkin lymphoma, peptide vaccination
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Journal OncoImmunology
Nelde, A. (Annika), Walz, J.S. (Juliane Sarah), Kowalewski, D.J. (Daniel Johannes), Schuster, H. (Heiko), Wolz, O.-O. (Olaf-Oliver), Peper, J.K. (Janet Kerstin), … Weber, A.N.R. (Alexander N. R.). (2017). HLA class I-restricted MYD88 L265P-derived peptides as specific targets for lymphoma immunotherapy. OncoImmunology, 6(3). doi:10.1080/2162402X.2016.1219825