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Ma, Zhenling; Zhao, Xueli; Deng, Mingjiao; Huang, Zhengjie; Wang, Jing; Wu, Yi; Cui, Dan; Liu, Yingfu; Liu, Rushi; Ouyang, Gaoliang
Cell reports (Cambridge), 02/2019, Volume: 26, Issue: 6Journal Article
Periostin (POSTN) is a multifunctional extracellular component that regulates cell-matrix interactions and cell-cell crosstalk. POSTN deletion significantly decreases leukemia burden in mice; however, the underlying mechanisms by which POSTN promotes B cell acute lymphoblastic leukemia (B-ALL) progression remain largely unknown. Here, we demonstrate that bone marrow (BM)-derived mesenchymal stromal cells (BM-MSCs) express higher levels of POSTN when co-cultured with B-ALL cells in vitro and in vivo. POSTN deficiency in BM-MSCs significantly decreases CCL2 expression in co-cultured B-ALL cells in vitro and in vivo. Moreover, POSTN treatment increases expression of CCL2 in B-ALL cells by activating the integrin-ILK-NF-κB pathway. Conversely, CCL2 treatment upregulates expression of POSTN in BM-MSCs via STAT3 activation. Furthermore, there is a positive correlation between POSTN expression and CCL2 level in the BM of mice and patients with B-ALL. These findings suggest that B-ALL cell-derived CCL2 contributes to the increased leukemia burden promoted by BM-MSC-derived POSTN. Display omitted •B-ALL cells increase periostin level in co-cultured BM-MSCs in vitro and in vivo•BM-MSC-derived periostin promotes B-ALL cell proliferation via NF-κB-CCL2 pathway•B-ALL cell-derived CCL2 increases periostin level in BM-MSCs via STAT3 activation•Periostin is positively correlated with CCL2 in BM of mice and patients with B-ALL Ma et al. show that BM-MSC-derived periostin promotes leukemia progression by activating the integrin-ILK-NF-κB-CCL2 pathway in leukemia cells and that leukemia cell-derived CCL2 increases periostin expression in BM-MSCs by activating STAT3. This work identifies critical crosstalk between leukemia cells and stromal cells via periostin and CCL2 in B-ALL progression.
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