Tianjin Medical Journal ›› 2025, Vol. 53 ›› Issue (1): 29-34.doi: 10.11958/20240355

• Experimental Research • Previous Articles     Next Articles

T-ALL derived bone marrow stromal stem cells promote T-ALL proliferation through the FGF2-FGFR2 pathway

YANG Jian1(), LI Min2, LI Yueyang2, TIAN Chen2,()   

  1. 1 Department of Surgical Oncology, Qingdao Central Cancer Hospital, Qingdao 266042, China
    2 Department of Hematology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin Clinical Research Center for Cancer
  • Received:2024-03-23 Revised:2024-09-11 Published:2025-01-15 Online:2025-02-06
  • Contact: E-mail:tianchen@tjmuch.com

Abstract:

Objective To elucidate the mechanistic role of bone marrow mesenchymal stromal cells (BM-MSCs) in T-cell acute lymphoblastic leukemia (T-ALL), and to find effective therapeutic strategies targeting BM-MSCs.Methods A T-ALL mouse model induced by Notch-1 overexpression was constructed. An in vitro co-culture system was established to investigate the proliferative capacity of T-ALL cells upon co-culturing with leukemia-derived MSCs. RNA sequencing was performed to identify key differentially expressed genes, which were further validated by PCR. BGJ398 was injected into mice to detect tumor growth.Results Co-culturing with T-ALL-derived MSCs resulted in a significant increase in T-ALL cell proliferation. RNA sequencing results revealed that the secretion of fibroblast growth factor 2 (FGF2) from T-ALL-derived MSCs was increased, which binds to fibroblast growth factor 2 receptor (FGFR2) on T-ALL cells, activating the PI3K/AKT/mTOR signaling pathway. Blocking the interaction between FGF2 and FGFR2 using BGJ398 inhibited the growth of T-ALL tumors in mice.Conclusion BM-MSCs can promote T-ALL tumor growth through FGF2/FGFR2 pathway, and blocking FGF2/FGFR2 pathway is an effective strategy to overcome BM-MSCS-mediated T-ALL progression.

Key words: precursor cell lymphoblastic leukemia-lymphoma, fibroblast growth factor 2, cell proliferation, bone marrow mesenchymal stromal cells, BGJ398

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