Unknown

Dataset Information

0

TNF-α-induced alterations in stromal progenitors enhance leukemic stem cell growth via CXCR2 signaling.


ABSTRACT: Chronic myeloid leukemia (CML) is propagated by leukemia stem cells (LSCs) that are not eradicated by tyrosine kinase inhibitor (TKI) treatment and persist as a source of disease recurrence. Bone marrow (BM) mesenchymal niches play an essential role in hematopoietic stem cell (HSC) and LSC maintenance. Using a murine CML model, we examine leukemia-induced alterations in mesenchymal cell populations. We show that 6C3+ stromal progenitors expand in CML BM and exhibit increased LSC but reduced HSC supportive capacity. Tumor necrosis factor alpha (TNF-α) signaling mediates expansion and higher expression of CXCL1 in CML BM 6C3+ cells and higher expression of the CXCL1 receptor CXCR2 in LSCs. CXCL1 enhances LSC proliferation and self-renewal, whereas CXCR2 inhibition reduces LSC growth and enhances LSC targeting in combination with tyrosine kinase inhibitors (TKIs). We find that TNF-α-mediated alterations in CML BM stromal niches enhance support of LSC maintenance and growth via CXCL1-CXCR2 signaling and that CXCR2 inhibition effectively depletes CML LSCs.

SUBMITTER: Agarwal P 

PROVIDER: S-EPMC8292106 | biostudies-literature |

REPOSITORIES: biostudies-literature

Similar Datasets

2021-06-16 | GSE126547 | GEO
| S-EPMC2040318 | biostudies-literature
| S-EPMC9211406 | biostudies-literature
| S-EPMC2904584 | biostudies-literature
| S-EPMC3111742 | biostudies-literature
| S-EPMC8618369 | biostudies-literature
| S-EPMC5651966 | biostudies-literature
| S-EPMC8233393 | biostudies-literature
| S-EPMC3414503 | biostudies-literature
| S-EPMC2867886 | biostudies-other