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Article

Bone marrow stromal cells enhance the survival of chronic lymphocytic leukemia cells by regulating HES‑1 gene expression and H3K27me3 demethylation

  • Authors:
    • Zhenshu Xu
    • Donglian Xiong
    • Jushun Zhang
    • Jingyan Zhang
    • Xiuli Chen
    • Zhizhe Chen
    • Rong Zhan
  • View Affiliations / Copyright

    Affiliations: Fujian Institute of Hematology, Fujian Provincial Key Laboratory of Hematology, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, P.R. China
  • Pages: 1937-1942
    |
    Published online on: November 21, 2017
       https://doi.org/10.3892/ol.2017.7450
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Abstract

The majority of patients with chronic lymphocytic leukemia (CLL) are not cured by traditional chemotherapy. One possible explanation for this is that the microenvironment protects CLL cells from both spontaneous‑ and cytotoxic‑mediated apoptosis. The present study was designed to investigate the mechanisms accounting for these effects, since this information is crucial to understanding CLL physiopathology and identifying potential treatment targets. The CLL cell line L1210 and primary CLL cells were cultured under different conditions: With serum, cyclophosphamide (CTX), or with monolayers and conditioned medium (CM) from the stromal cell line HESS‑5. Apoptosis, Hes family BHLH transcription factor 1 (HES‑1) gene and protein expression, and histone H3K27me3 DNA demethylation were determined. Co‑culture of L1210 cells with HESS‑5 cells significantly inhibited serum deprivation‑ and CTX‑induced apoptosis of leukemia cells, and resulted in a significant increase in short‑term proliferation. Soluble factors in the CM from HESS‑5 cells had a negligible effect. The HESS‑5 cell‑mediated inhibition of apoptosis of CLL cells was associated with increased HES‑1 expression and hypomethylation of the H3K27me3 gene in the leukemia cells. These results indicate that stromal cells enhance the survival of CLL cells by regulating the HES‑1 gene and protein expression, as well as H3K27me3 DNA demethylation, and suggest that specific interactions between stromal and leukemia cells may enhance the resistance of leukemia cells to chemotherapy.
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Copy and paste a formatted citation
Spandidos Publications style
Xu Z, Xiong D, Zhang J, Zhang J, Chen X, Chen Z and Zhan R: Bone marrow stromal cells enhance the survival of chronic lymphocytic leukemia cells by regulating HES‑1 gene expression and H3K27me3 demethylation. Oncol Lett 15: 1937-1942, 2018.
APA
Xu, Z., Xiong, D., Zhang, J., Zhang, J., Chen, X., Chen, Z., & Zhan, R. (2018). Bone marrow stromal cells enhance the survival of chronic lymphocytic leukemia cells by regulating HES‑1 gene expression and H3K27me3 demethylation. Oncology Letters, 15, 1937-1942. https://doi.org/10.3892/ol.2017.7450
MLA
Xu, Z., Xiong, D., Zhang, J., Zhang, J., Chen, X., Chen, Z., Zhan, R."Bone marrow stromal cells enhance the survival of chronic lymphocytic leukemia cells by regulating HES‑1 gene expression and H3K27me3 demethylation". Oncology Letters 15.2 (2018): 1937-1942.
Chicago
Xu, Z., Xiong, D., Zhang, J., Zhang, J., Chen, X., Chen, Z., Zhan, R."Bone marrow stromal cells enhance the survival of chronic lymphocytic leukemia cells by regulating HES‑1 gene expression and H3K27me3 demethylation". Oncology Letters 15, no. 2 (2018): 1937-1942. https://doi.org/10.3892/ol.2017.7450
Copy and paste a formatted citation
x
Spandidos Publications style
Xu Z, Xiong D, Zhang J, Zhang J, Chen X, Chen Z and Zhan R: Bone marrow stromal cells enhance the survival of chronic lymphocytic leukemia cells by regulating HES‑1 gene expression and H3K27me3 demethylation. Oncol Lett 15: 1937-1942, 2018.
APA
Xu, Z., Xiong, D., Zhang, J., Zhang, J., Chen, X., Chen, Z., & Zhan, R. (2018). Bone marrow stromal cells enhance the survival of chronic lymphocytic leukemia cells by regulating HES‑1 gene expression and H3K27me3 demethylation. Oncology Letters, 15, 1937-1942. https://doi.org/10.3892/ol.2017.7450
MLA
Xu, Z., Xiong, D., Zhang, J., Zhang, J., Chen, X., Chen, Z., Zhan, R."Bone marrow stromal cells enhance the survival of chronic lymphocytic leukemia cells by regulating HES‑1 gene expression and H3K27me3 demethylation". Oncology Letters 15.2 (2018): 1937-1942.
Chicago
Xu, Z., Xiong, D., Zhang, J., Zhang, J., Chen, X., Chen, Z., Zhan, R."Bone marrow stromal cells enhance the survival of chronic lymphocytic leukemia cells by regulating HES‑1 gene expression and H3K27me3 demethylation". Oncology Letters 15, no. 2 (2018): 1937-1942. https://doi.org/10.3892/ol.2017.7450
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