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Bone marrow dendritic cells support the survival of chronic lymphocytic leukemia cells in a CD84 dependent manner.
Oncogene ( IF 6.9 ) Pub Date : 2019-11-26 , DOI: 10.1038/s41388-019-1121-y
Avital F Barak 1 , Hadas Lewinsky 1 , Michal Perpinial 1 , Victoria Huber 1 , Lihi Radomir 1 , Mattias P Kramer 1 , Lital Sever 1 , Yochai Wolf 1 , Mika Shapiro 2 , Yair Herishanu 2 , Steffen Jung 1 , Shirly Becker-Herman 1 , Idit Shachar 1
Affiliation  

Chronic lymphocytic leukemia (CLL) is a malignancy of mature B lymphocytes. The microenvironment of the CLL cells is a vital element in the regulation of the survival of these malignant cells. CLL cell longevity is dependent on external signals, originating from cells in their microenvironment including secreted and surface-bound factors. Dendritic cells (DCs) play an important part in tumor microenvironment, but their role in the CLL bone marrow (BM) niche has not been studied. We show here that CLL cells induce accumulation of bone marrow dendritic cells (BMDCs). Depletion of this population attenuates disease expansion. Our results show that the support of the microenvironment is partly dependent on CD84, a cell surface molecule belonging to the Signaling Lymphocyte Activating Molecule (SLAM) family of immunoreceptors. Our results suggest a novel therapeutic strategy whereby eliminating BMDCs or blocking the CD84 expressed on these cells may reduce the tumor load.

中文翻译:

骨髓树突状细胞以 CD84 依赖性方式支持慢性淋巴细胞白血病细胞的存活。

慢性淋巴细胞白血病 (CLL) 是成熟 B 淋巴细胞的恶性肿瘤。CLL细胞的微环境是调节这些恶性细胞存活的重要因素。CLL 细胞的寿命取决于外部信号,这些信号源自其微环境中的细胞,包括分泌的和表面结合的因子。树突状细胞 (DC) 在肿瘤微环境中发挥重要作用,但尚未研究它们在 CLL 骨髓 (BM) 生态位中的作用。我们在这里展示 CLL 细胞诱导骨髓树突状细胞 (BMDCs) 的积累。这一人口的枯竭减弱了疾病的蔓延。我们的研究结果表明,微环境的支持部分依赖于 CD84,CD84 是一种细胞表面分子,属于免疫受体信号淋巴细胞激活分子 (SLAM) 家族。
更新日期:2019-11-27
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