Nat Commun:靶向PI3K/AKT的过度激活诱导慢性淋巴细胞白血病的细胞死亡

2021-06-13 xiaozeng MedSci原创

在慢性淋巴细胞白血病(CLL)中,自主自身免疫反应性BCR(B细胞受体)信号有助于肿瘤细胞的存活

在慢性淋巴细胞白血病(CLL)中,自主自身免疫反应性BCR(B细胞受体)信号有助于肿瘤细胞的存活,且目前已建立的靶向治疗策略主要侧重于抑制BCR通路中的致癌激酶,通过剥夺相关信号,从而导致细胞的死亡。

然而,尽管CLL得到了最初的缓解,但患者经常会出现复发性难治性疾病或最终进展为Richter综合征,且治疗的选择有限。

在该研究中,研究人员提出了以下假设,即通过靶向PI3K/AKT(3-磷酸磷脂酰肌醇/AKT)信号通路的过度激活来触发CLL细胞的死亡。结果显示,遗传学上过度激活PI3K/AKT信号转导通路或阻断抑制性磷酸酶SHIP1的活性会诱导CLL细胞的急性细胞死亡过程。

急性AKT1激活对CLL细胞是有害的

机制研究显示,抑制SHIP1后会引起AKT活性的升高,导致线粒体呼吸的增加并导致活性氧(ROS)的过度积累,导致具有免疫原性特征的CLL细胞的死亡。

CLL细胞存活需要SHIP1的活性来抑制AKT信号

总而言之,该研究结果揭示,CLL细胞严重依赖于PI3K/AKT的活性,以保证其持续的增殖和存活,且避免ROS诱导的细胞死亡作用,该研究结果也表明了SHIP1的瞬时抑制或是CLL的一个潜在的治疗策略。


原始出处:

Ecker, V., Stumpf, M., Brandmeier, L. et al. Targeted PI3K/AKT-hyperactivation induces cell death in chronic lymphocytic leukemia. Nat Commun 12, 3526 (10 June 2021).

 

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    2022-05-21 liye789132251
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    2021-10-07 xfpan20
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    2021-10-09 liuli5079
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    2022-01-17 lidong40
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    2021-06-15 ms5000000518166734

    已读,真是受益匪浅呀!

    0

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