异常表达的线粒体脂类激酶,AGK,激活JAK2-基因组H3轴和BCR信号:一种机制研究,涉及到CLL治疗
Murali K Mamidi1, Sutapa Sinha2, Mariana T Mendez1
1Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma.
概括
异常表达的乙糖醇激酶 (AGK) 在慢性淋巴细胞白血病 (CLL) 细胞中激活Janus激酶2 (JAK2),推动细胞存活. 用BCR或BCL2抑制剂向JAK2显示出对CLL治疗的希望.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- B细胞受体 (BCR) 途径对慢性淋巴细胞白血病 (CLL) 细胞存活至关重要,并且是像ibrutinib和idelalisib这样的疗法所准的.
- 细胞因子驱动的Janus酶2 (JAK2) 途径在CLL细胞生存信号网络中的作用仍然在很大程度上未被定义.
研究的目的:
- 研究CLL细胞中JAK2和乙糖醇激酶 (AGK) 的表达和激活.
- 确定JAK2和AGK在初级CLL细胞存活中的功能作用.
- 为了阐明涉及的潜在分子机制.
主要方法:
- 对来自患者的CLL细胞进行了JAK2和AGK表达和激活的分析.
- 生物化学和分子生物学分析被用来发现信号通路.
- 对JAK2,BCR和BCL2通路的向抑制被评估为对亡的协同效应.
主要成果:
- 结核性淋巴瘤细胞表现出构成性活跃的JAK2的异常表达,这种表达受到HSP90的辅导.
- 上调的AGK与HSP90形成复合体,独立于细胞因子激活JAK2.
- JAK2酸化基因组H3(Y41),通过LYN/Bruton的氨酸激酶激活患者特异性基因转录和BCR途径.
- 联合抑制JAK2与BCR或BCL2抑制剂诱导了CLL细胞中的协同性亡.
结论:
- 异常表达的AGK激活了CLL细胞中的JAK2,独立于细胞因子,导致多样化的基因转录.
- 针对JAK2与BCR或BCL2通路结合,为CLL患者的一个子集提供了潜在的治疗策略.
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