大麻素组合通过综合应激反应途径准NOTCH1突变的T细胞急性淋巴细胞白血病
Elazar Besser1, Anat Gelfand1, Shiri Procaccia1
1The Laboratory of Cancer Biology and Cannabinoid Research, Faculty of Biology, Technion - Israel Institute of Technology, Haifa, Israel.
eLife
|September 11, 2024
概括
三种大麻素,包括新型331-18A,通过抑制Notch1成熟,诱导T细胞急性淋巴细胞白血病 (T-ALL) 的亡. 这一发现为NOTCH1-突变癌症提供了新的治疗途径.
科学领域:
- 在瘤学瘤学.
- 药理学 药理学是指药理学的学科.
- 分子生物学分子生物学
背景情况:
- T细胞急性淋巴细胞白血病 (T-ALL) 通常涉及Notch1信号的自动激活,驱动癌症的发展.
- 之前发现,一种特定的大麻化学药物可通过抑制Notch1成熟来诱导白血病的亡.
研究的目的:
- 从已识别的Cannabis chemovar中分离和描述大麻素.
- 阐明这些大麻素在T-ALL中的作用机制.
- 在临床前模型中评估它们的治疗潜力.
主要方法:
- 三种大麻素的分离和表征:大麻 (CBD),大麻 (CBDV) 和一种新型化合物331-18A.
- 通过大麻素受体2型 (CB2) 和TRPV1对大麻素作用的研究,重点关注综合应激反应途径和耗竭.
- 对ATF4,CHOP,CHAC1和eIF2α的下游影响及其对Notch1成熟的影响的评估.
- 使用小鼠模型进行体内研究,以评估瘤减少和白血病进展.
主要成果:
- 通过CB2和TRPV1.1,CBD,CBDV和331-18A通过激活CB2和TRPV1.1的综合应激回应通路来协同抑制Notch1成熟.
- 这种途径的激活涉及细胞内Ca2+耗尽和增加ATF4,CHOP和CHAC1表达,由eIF2α介导.
- CHAC1的上调阻止了Notch1的成熟,降低了活跃的Notch1细胞内域水平,导致细胞活力下降和细胞亡增加.
- 在体内给予这些大麻素显著降低了瘤大小和体重,并减缓了小鼠白血病的进展.
结论:
- 三种不同的大麻素,包括新的331-18A,有效地准T-ALL.中的Notch1途径.
- 它们的机制涉及激活综合应激反应途径,导致细胞亡和减少白血病的进展.
- 这些发现代表了开发新型大麻素基疗法,以治疗NOTCH1-突变癌症,如T-ALL.等癌症的重大进展.
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