siRNA微细胞复合体介导的谷氨酸代谢再工程用于血管正常化促进的光免疫疗法
Yunfei Yi1,2,3, Zhangwen Peng2, Yuanqi Liu2
1State Key Laboratory of Advanced Medical Materials and Devices, Tianjin Key Laboratory of Biomedical Materials, Key Laboratory of Biomaterials and Nanotechnology for Cancer Immunotherapy, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin 300192, China.
Acta pharmaceutica Sinica. B
|June 9, 2025
概括
这项研究的目标是通过抑制谷氨酸分解,重编程瘤微环境 (TME) 来抑制癌细胞代谢,以增强免疫疗法,并使瘤血管正常化,以改善癌症治疗.
科学领域:
- 癌症生物学 癌症生物学
- 免疫学 免疫学 免疫学
- 代谢重编程 代谢重编程
背景情况:
- 瘤细胞重编程新陈代谢,严重依赖谷氨酸来获得能量和生长.
- 与瘤相关的巨细胞 (TAMs) 和内皮细胞也利用谷氨酸溶解,为免疫抑制性瘤微环境 (TME) 作出贡献.
- 谷氨酸溶解促进了血管生成,并促进了TAMs的M2两极化,阻碍了抗瘤免疫力.
研究的目的:
- 开发一种新的治疗策略,针对TME内的谷氨酸溶解.
- 研究抑制谷氨酸溶解以逆转免疫抑制和增强癌症免疫疗法的潜力.
- 探索向瘤血管正常化和TAM再极化的综合效应.
主要方法:
- 开发siRNA小细胞复合体 (MH@siGLS1),以抑制谷氨酸酶1 (GLS1).
- 在瘤细胞,内皮细胞和TAM中抑制谷氨酸酶解.
- 评估光动力学治疗 (PDT) 的疗效,免疫细胞死亡,血管正常化和TAM再极化.
主要成果:
- MH@siGLS1介导的谷氨酸分解抑制诱导了瘤细胞饥饿,破坏了抗氧化系统,提高了PDT的疗效.
- 向内皮细胞和TAM中的谷氨酸溶解导致瘤血管正常化和M2 TAM再极化.
- 这些综合作用放大了抗瘤免疫反应,促进了适应性免疫力.
结论:
- 向谷氨酸溶解是一种可行的策略,可以逆转TME介导的免疫抑制.
- MH@siGLS1通过增强PDT和调节TME,为光免疫疗法提供了一种有前途的方法.
- 这项研究强调了代谢重编程在癌症中的关键作用,并提供了新的治疗视角.
相关概念视频
RNA Interference
RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the post-transcriptional expression of a gene by binding to its messenger RNA (mRNA) and preventing the protein from being translated.
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
Gene Therapy
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RNA Interference
RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the post-transcriptional expression of a gene by binding to its messenger RNA (mRNA) and preventing the protein from being translated.
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
siRNA - Small Interfering RNAs
Small interfering RNAs, or siRNAs, are short regulatory RNA molecules that can silence genes post-transcriptionally, as well as the transcriptional level in some cases. siRNAs are important for protecting cells against viral infections and silencing transposable genetic elements.
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the ATP-dependent...
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the ATP-dependent...
Experimental RNAi
RNA interference (RNAi) is a cellular mechanism that inhibits gene expression by suppressing its transcription or activating the RNA degradation process. The mechanism was discovered by Andrew Fire and Craig Mello in 1998 in plants. Today, it is observed in almost all eukaryotes, including protozoa, flies, nematodes, insects, parasites, and mammals. This precise cellular mechanism of gene silencing has been developed into a technique that provides an efficient way to identify and determine the...


