白血病细胞通过CaV1.2-依赖机制劫持流体生物电力来重新编程骨髓
Ambra Da Ros1, Maddalena Benetton1, Giulia Borella1
1Department of Women's and Children's Health, Onco-Hematology lab and clinic, University of Padova, Padova, 35128, Italy.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|August 20, 2025
概括
儿童急性髓性白血病 (AML) 爆发通过改变其生物电特性,特别是膜电位和通道表达,重新编程健康的介质层细胞 (MSC). 恢复MSC的正常电功能可能会逆转白血病支持作用.
科学领域:
- 癌症生物学
- 细胞电生理学
- 血液学
背景情况:
- 介质细胞 (MSC) 是瘤微环境 (TME) 的组成部分,但它们在白血病进展中的作用尚未完全理解.
- MSCs的生物电特性及其由癌细胞调节是研究的关键领域.
研究的目的:
- 对儿童急性髓性白血病 (AML) 患者 (AML-MSC) 和健康的MSC (h-MSC) 的生物电特性进行研究.
- 确定白血病细胞是否积极重编程MSC,并探索这些变化的功能后果.
- 评估针对MSC生物电特性进行治疗的潜力.
主要方法:
- 在AML-MSC和h-MSC中测量静止膜电位 (Vmem).
- 分析L型通道 (CaV1.2) 表达和振荡.
- 用AML爆发和随后的Vmem和CaV1.2分析对h-MSC进行实验操作.
- 功能性测试评估重新编程的MSC的亲白血病表型.
- 在AML-MSC中过度表达CaV1. 2并评估对Vmem和白血病支持的影响.
主要成果:
- 与h-MSCs (-28. 5 mV) 相比,AML-MSCs表现出显著的Vmem脱极化和减少的CaV1. 2表达.
- 暴露于AML爆发诱导类似的Vmem脱极化和CaV1.2降低调节在h-MSCs中,表明活动重编程.
- 在h-MSC中的Vmem脱极化促进了亲白血病的表型,而AML-MSC的超极化则使其行为正常化.
- 在AML-MSC中CaV1.2的过度表达部分扭转了它们的白血病支持性质,部分是通过道纳米管的转移.
结论:
- 白血病爆发会对TME内的MSC施加独特的生物电 signature,改变离子通道活动以促进白血病允许的利基.
- 针对MSC的电力重编程,特别是通过恢复CaV1.2功能,为恢复AML骨髓平衡提供了潜在的治疗策略.
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