瘤微环境可激活纳米系统能够克服多个治疗障碍,以增强免疫/金属离子疗法
Qian Cheng1,2,3, Xiaolei Shi1,2,3, Yuzhe Chen1,2,3
1Research Center for Tissue Engineering and Regenerative Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China.
ACS nano
|March 13, 2024
概括
这项研究开发了一个智能纳米系统,可以在瘤微环境 (TME) 中缩小,透到深层瘤中. 它逆转了支持瘤的TME,增强了纳米药物的有效性,并使组合疗法能够改善抗瘤效果.
科学领域:
- 生物医学工程 生物医学工程
- 纳米技术纳米技术
- 癌症治疗 癌症治疗
背景情况:
- 异常的瘤微环境 (TME) 阻碍了纳米医药的透和有效性.
- 瘤细胞发展出抵抗机制,挑战纳米医学的发展.
- 现有的纳米药物在达到和治疗深层瘤方面面临重大障碍.
研究的目的:
- 设计一个可以通过TME激活,尺寸可切换的纳米系统 (Mn-TI-Ag@HA) 以提高纳米药物供应.
- 为了逆转支持瘤的TME并增强联合免疫/金属离子疗法.
- 克服瘤对纳米药物的耐药性,并改善治疗结果.
主要方法:
- 设计了一个由TME.HA激活的核心卫星纳米系统 (Mn-TI-Ag@HA).
- 设计了纳米系统,在TME激活时释放超小的Ag纳米粒子,以深入瘤透.
- 嵌入氧气生产和TGF-β抑制剂来调节TME并增强金属离子疗法.
主要成果:
- 在TME激活后,纳米系统成功地深入到固体瘤中.
- 激活纳米系统通过促进M2到M1巨细胞两极分化和增加内H2O2.2,从而逆转了支持瘤的TME.
- 通过加速Ag+生产进行增强的金属离子疗法,导致显著的瘤抑制.
- 与抗PD-1药物结合,诱导长期免疫记忆,防止瘤复发.
结论:
- 开发的纳米系统有效地克服了与TME相关的纳米医学障碍.
- 这种方法证明了显著的瘤透,TME调节和抗瘤功效.
- 这项研究为设计先进的抗瘤纳米药物提供了一个新的范式.
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