Late-stage tumors induce anemia and immunosuppressive extramedullary erythroid progenitor cells.
Nat Med
; 24(10): 1536-1544, 2018 10.
Article
em En
| MEDLINE
| ID: mdl-30297899
ABSTRACT
Impaired immunity in patients with late-stage cancer is not limited to antitumor responses, as demonstrated by poor vaccination protection and high susceptibility to infection1-3. This has been largely attributed to chemotherapy-induced impairment of innate immunity, such as neutropenia2, whereas systemic effects of tumors on hematopoiesis and adoptive immunity remain incompletely understood. Here we observed anemia associated with severe deficiency of CD8+ T cell responses against pathogens in treatment-naive mice bearing large tumors. Specifically, we identify CD45+ erythroid progenitor cells (CD71+TER119+; EPCs) as robust immunosuppressors. CD45+ EPCs, induced by tumor growth-associated extramedullary hematopoiesis, accumulate in the spleen to become a major population, outnumbering regulatory T cells (Tregs) and myeloid-derived suppressor cells (MDSCs). The CD45+ EPC transcriptome closely resembles that of MDSCs, and, like MDSCs, reactive oxygen species production is a major mechanism underlying CD45+ EPC-mediated immunosuppression. Similarly, an immunosuppressive CD45+ EPC population was detected in patients with cancer who have anemia. These findings identify a major population of immunosuppressive cells that likely contributes to the impaired T cell responses commonly observed in patients with advanced cancer.
Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Células Precursoras Eritroides
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Sarcoma Mieloide
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Células Supressoras Mieloides
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Anemia
Idioma:
En
Ano de publicação:
2018
Tipo de documento:
Article