Late-stage tumors induce anemia and immunosuppressive extramedullary erythroid progenitor cells.

Journal Article (Journal Article)

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.

Full Text

Duke Authors

Cited Authors

  • Zhao, L; He, R; Long, H; Guo, B; Jia, Q; Qin, D; Liu, S-Q; Wang, Z; Xiang, T; Zhang, J; Tan, Y; Huang, J; Chen, J; Wang, F; Xiao, M; Gao, J; Yang, X; Zeng, H; Wang, X; Hu, C; Alexander, PB; Symonds, ALJ; Yu, J; Wan, Y; Li, Q-J; Ye, L; Zhu, B

Published Date

  • October 2018

Published In

Volume / Issue

  • 24 / 10

Start / End Page

  • 1536 - 1544

PubMed ID

  • 30297899

Pubmed Central ID

  • PMC6211844

Electronic International Standard Serial Number (EISSN)

  • 1546-170X

Digital Object Identifier (DOI)

  • 10.1038/s41591-018-0205-5


  • eng

Conference Location

  • United States