超分子金属循环使能激活以雌激酶反应和内分泌网膜相关途径,用于协同光热免疫疗法
Sina Chen1, Dongdong Xu1, Huanan Yu2
1Key Laboratory of Organosilicon Chemistry and Materials Technology of the Ministry of Education, Zhejiang Key Laboratory of Organosilicon Material Technology, College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, P. R. China.
ACS nano
|January 14, 2026
概括
研究人员开发了一种新型的超分子金属循环纳米粒子,该纳米粒子针对癌症免疫治疗的内分泌网膜. 这个平台激活了cGAS-STING通路,增强了针对瘤切除和转移抑制的免疫反应.
科学领域:
- 生物医学工程 生物医学工程
- 纳米技术纳米技术
- 癌症研究 癌症研究
背景情况:
- 超分子金属循环为整合癌症疗法提供了潜力.
- 激活干扰素基因 (STING) 途径的循环GMP-AMP合成酶 (cGAS) 刺激器是一种有前途的免疫疗法策略.
- 金属循环与cGAS-STING激活用于癌症治疗的整合仍未得到充分研究.
研究的目的:
- 为了设计一个内分泌网膜 (ER) - - 积累的高分子 ((II) 金属循环 (M2) 以对乙酶反应的cGAS-STING激活.
- 通过联合提供光热剂, (II) 化疗单元和STING激动剂DMXAA.AA.开发用于协同光热免疫疗法的纳米平台.
- 为了研究这个纳米平台对原发性瘤切除和远程转移抑制的潜力.
主要方法:
- 制造M2超分子金属循环纳米粒子 (NP),共同提供治疗剂和用于ER向的DSPE-PEG.
- 在瘤ER中利用卡韦林介导的内细胞分裂来选择性NP积累.
- 调查细胞内雌激酶触发的NP分解和光热刺激以释放DMXAA和激活STING.
- 评估光热疗法和化疗对免疫细胞死亡和cGAS-STING信号放大作用的协同效应.
主要成果:
- 在瘤ER中通过卡韦林介导的内细胞分裂选择性地积累的M2NP.
- 细胞内雌激酶和光热刺激触发了NP分解,释放了DMXAA以激活STING.
- 协同光热/化疗诱导免疫细胞死亡,释放DAMP并产生dsDNA,进一步放大cGAS-STING信号.
- 双通路激活导致了强大的抗瘤免疫力,在小鼠模型中实现了初级瘤切除和抑制远程转移.
结论:
- 超分子Pt(II) 金属循环可以被设计为有针对性的药物输送和cGAS-STING通路激活.
- 这种纳米平台通过双通道cGAS-STING激活实现了协同光热免疫疗法.
- 开发的策略具有在癌症治疗中将光热疗法与免疫相关功能相结合的巨大潜力.
相关概念视频
01:12Cycloaddition Reactions: MO Requirements for Photochemical Activation
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Some cycloaddition reactions are activated by heat, while others are initiated by light. For example, a [2 + 2] cycloaddition between two ethylene molecules occurs only in the presence of light. It is photochemically allowed but thermally forbidden.
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01:17Thermal Electrocyclic Reactions: Stereochemistry
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The stereochemistry of electrocyclic reactions is strongly influenced by the orbital symmetry of the polyene HOMO. Under thermal conditions, the reaction proceeds via the ground-state HOMO.
Selection Rules: Thermal Activation
Conjugated systems containing an even number of π-electron pairs undergo a conrotatory ring closure. For example, thermal electrocyclization of (2E,4E)-2,4-hexadiene, a conjugated diene containing two π-electron pairs, gives trans-3,4-dimethylcyclobutene.
Selection Rules: Thermal Activation
Conjugated systems containing an even number of π-electron pairs undergo a conrotatory ring closure. For example, thermal electrocyclization of (2E,4E)-2,4-hexadiene, a conjugated diene containing two π-electron pairs, gives trans-3,4-dimethylcyclobutene.
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01:26Photochemical Electrocyclic Reactions: Stereochemistry
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The absorption of UV–visible light by conjugated systems causes the promotion of an electron from the ground state to the excited state. Consequently, photochemical electrocyclic reactions proceed via the excited-state HOMO rather than the ground-state HOMO. Since the ground- and excited-state HOMOs have different symmetries, the stereochemical outcome of electrocyclic reactions depends on the mode of activation; i.e., thermal or photochemical.
Selection Rules: Photochemical Activation
Selection Rules: Photochemical Activation
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