Abstract
Remote tumors disrupt the bone marrow (BM) ecosystem (BME), eliciting the overproduction of BM-derived immunosuppressive cells. However, the underlying mechanisms remain poorly understood. Herein, we characterized breast and lung cancer-induced BME shifts pre- and post-tumor removal. Remote tumors progressively lead to osteoprogenitor (OP) expansion, hematopoietic stem cell dislocation, and CD41− granulocyte-monocyte progenitor (GMP) aggregation. The tumor-entrained BME is characterized by co-localization between CD41− GMPs and OPs. OP ablation abolishes this effect and diminishes abnormal myeloid overproduction. Mechanistically, HTRA1 carried by tumor-derived small extracellular vesicles upregulates MMP-13 in OPs, which in turn induces the alterations in the hematopoietic program. Importantly, these effects persist post-surgery and continue to impair anti-tumor immunity. Conditional knockout or inhibition of MMP-13 accelerates immune reinstatement and restores the efficacies of immunotherapies. Therefore, tumor-induced systemic effects are initiated by OP-GMP crosstalk that outlasts tumor burden, and additional treatment is required to reverse these effects for optimal therapeutic efficacy.
Original language | English (US) |
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Pages (from-to) | 648-664.e8 |
Journal | Cell Stem Cell |
Volume | 30 |
Issue number | 5 |
DOIs | |
State | Published - May 4 2023 |
Keywords
- bone marrow niches
- cancer
- hematopoiesis
- hematopoietic stem/progenitor cells
- immunotherapies
- MDSCs
- myelopoiesis
- osteoprogenitor
- scRNA-seq
- systemic immunosuppression
- High-Temperature Requirement A Serine Peptidase 1/pharmacology
- Neoplasms/pathology
- Humans
- Matrix Metalloproteinase 13/pharmacology
- Immunosuppression Therapy
- Ecosystem
- Myelopoiesis
- Hematopoietic Stem Cells
ASJC Scopus subject areas
- Genetics
- Molecular Medicine
- Cell Biology