Heterologous Vaccination and Checkpoint Blockade Synergize To Induce Antileukemia Immunity
| Autor: | Vaiva Vezys, Jason M. Schenkel, Michael A. Farrar, Luke S. Manlove, Kristen E. Pauken, Kezia R. Manlove, Richard Thomas Williams |
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| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
Nonsynonymous substitution Cell cycle checkpoint Immunology Population Heterologous Biology medicine.disease_cause Article 03 medical and health sciences Mice 0302 clinical medicine hemic and lymphatic diseases Precursor B-Cell Lymphoblastic Leukemia-Lymphoma medicine Immunology and Allergy Missense mutation Animals education Mice Knockout Mutation education.field_of_study Vaccination Cell Cycle Checkpoints medicine.disease Blockade Mice Inbred C57BL Leukemia Disease Models Animal 030104 developmental biology 030215 immunology |
| Zdroj: | Journal of immunology (Baltimore, Md. : 1950). 196(11) |
| ISSN: | 1550-6606 |
| Popis: | Checkpoint blockade-based immunotherapies are effective in cancers with high numbers of nonsynonymous mutations. In contrast, current paradigms suggest that such approaches will be ineffective in cancers with few nonsynonymous mutations. To examine this issue, we made use of a murine model of BCR-ABL+ B-lineage acute lymphoblastic leukemia. Using a principal component analysis, we found that robust MHC class II expression, coupled with appropriate costimulation, correlated with lower leukemic burden. We next assessed whether checkpoint blockade or therapeutic vaccination could improve survival in mice with pre-established leukemia. Consistent with the low mutation load in our leukemia model, we found that checkpoint blockade alone had only modest effects on survival. In contrast, robust heterologous vaccination with a peptide derived from the BCR-ABL fusion (BAp), a key driver mutation, generated a small population of mice that survived long-term. Checkpoint blockade strongly synergized with heterologous vaccination to enhance overall survival in mice with leukemia. Enhanced survival did not correlate with numbers of BAp:I-Ab–specific T cells, but rather with increased expression of IL-10, IL-17, and granzyme B and decreased expression of programmed death 1 on these cells. Our findings demonstrate that vaccination to key driver mutations cooperates with checkpoint blockade and allows for immune control of cancers with low nonsynonymous mutation loads. |
| Databáze: | OpenAIRE |
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