骨髓微环境响应的聚合物药物/siRNA调节白血病干细胞,帮助预防AML复发
Shihong Cheng1, Xiaohan Kong1, Yiqiu Zhang1
1School of Pharmaceutical Sciences (Shenzhen), Shenzhen Campus of Sun Yat-sen University, Shenzhen, 518107, China; School of Pharmaceutical Sciences (Shenzhen), Sun Yat-sen University, Guangzhou, 510275, China.
一种新的聚合物输送系统通过抑制其迁移和干细胞来向急性髓性白血病 (AML) 中的白血病干细胞 (LSC). 这种方法提高了化疗的疗效,为治疗AML复发提供了新的希望.
科学领域:
- 血液学 血液学 血液学
- 在瘤学瘤学.
- 生物材料科学 生物材料科学
背景情况:
- 急性髓性白血病 (AML) 是一种具有挑战性的癌症,结果不佳,通常是由于耐治疗白血病干细胞 (LSCs).
- 低血压细胞通过居住在缺氧骨髓中来逃避治疗,从而导致疾病复发.
- 目前的治疗方法难以有效消除LSC,需要新的治疗策略.
研究的目的:
- 开发一种创新的聚合物药物/siRNA输送系统,以向低氧骨髓环境中的LSC.
- 将plerixafor (CXCR4抗剂) 和针对Fis1 (线粒体裂变蛋白1) 的siRNA同时传递给LSCs.
- 评估该系统在抑制LSC迁移和茎结合方面的有效性,从而改善AML治疗结果.
主要方法:
- 设计了一种基于聚合物的输送系统 (PPLazo/siFis1@C),能够响应低氧条件.
- 同时提供plerixafor来破坏CXCR4/CXCL12轴和向Fis1的siRNA,以诱导LCS中的线粒细胞衰变.
- 在AML模型中评估了该系统对LSC迁移,线粒体自,干性和与常规化疗的协同作用的影响.
主要成果:
- 双作用传递系统通过准CXCR4/CXCL12轴,有效地抑制了LSC迁移.
- 降低Fis1表达的调节导致了被抑制的线粒体自,减少了LSC干.
- 该PPLazo/siFis1@C系统显著提高了标准化疗剂对LSC的疗效.
结论:
- 这种低氧反应的聚合物输送系统为针对LSC在AML中提供了一个有前途的战略.
- 对LSC迁移和茎结合的联合抑制为对抗AML复发提供了一种新的治疗方法.
- 这种综合疗法有可能改善复发性或耐药性AML患者的治疗结果.
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