调节MOF能量状态以构建用于膜导向C-H基因治疗瘤细胞的智能激活感应器
Xianchao Jia1, Huiyang Li1, Ye Gao1
1State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, China.
Advanced materials (Deerfield Beach, Fla.)
|January 28, 2026
概括
这项研究介绍了一种智能纳米复合材料,该材料精确地准并氧化瘤膜中的特定脂质. 这种方法触发癌细胞死亡,并重塑瘤微环境,以增强免疫反应.
科学领域:
- 生物材料科学 生物材料科学
- 癌症生物学 癌症生物学
- 纳米技术纳米技术
背景情况:
- 脂氧化是瘤发生和瘤微环境 (TME) 重塑的组成部分,经常导致炎症和膜损伤.
- 脂过氧化的复杂性需要精确的催化平台来进行氧化脂类物种的机械研究.
研究的目的:
- 设计一种用于向脂氧化和TME调节的智能复合材料.
- 通过诱导免疫细胞死亡和抑制瘤生长来研究这种材料在癌症治疗中的潜力.
主要方法:
- 整合一个改性金属有机框架 (MOF) 与一个受体氨酸激酶 (RTKs) 向光探针 (SD-1),以创建SD-1@PCN-Ru.Ru.
- 利用MOF的特性,在瘤膜上空间限制过度表达RTKs的氧化活性.
- 采用脂管学和体外/体外研究来评估脂物耗尽,ROS生成和治疗疗效.
主要成果:
- SD-1@PCN-Ru展示了增强的光诱导氧激活和电子转移,促进脂类化.
- 观察到类乙醇胺 (PE) 和类胆 (PC) 的选择性耗尽,损害了膜完整性并产生免疫刺激性氧化脂质.
- 该物质通过caspase-1/3和GSDMD激活诱导免疫细胞死亡,重塑免疫抑制TME并显示瘤特异性细胞毒性和生长抑制.
结论:
- 设计的SD-1@PCN-Ru纳米复合材料为研究脂质过氧化提供了一个精确的催化平台.
- 这种智能材料通过诱导氧化损伤和免疫激活来有效调节TME,从而导致瘤生长抑制.
- 这项工作开创了合成生物整合,用于脂质过氧化介导的癌症治疗中的转化策略.
相关概念视频
01:26Activation Energy
86.6K
Activation energy is the minimum amount of energy necessary for a chemical reaction to move forward. The higher the activation energy, the slower the rate of the reaction. However, adding heat to the reaction will increase the rate, since it causes molecules to move faster and increase the likelihood that molecules will collide. The collision and breaking of bonds represents the uphill phase of a reaction and generates the transition state. The transition state is an unstable high-energy state...
86.6K
02:13Bond Dissociation Energy and Activation Energy
11.0K
Bond energy is the energy required to break a bond homolytically. These values are usually expressed in units of kcal/mol or kJ/mol and are referred to as bond dissociation energies when given for specific bonds or average bond energies when indicated for a given type of bond over many compounds. Firstly, the bond dissociation energy for a single bond is weaker than that of a double bond, which in turn is weaker than that of a triple bond. Secondly, hydrogen forms relatively strong bonds with...
11.0K
02:58Cell Potential and Free Energy
46.4K
Thermodynamics of a Redox Reaction
Thermodynamics is the branch of physics dealing with the relationship between heat and other forms of energy. In an electrochemical cell, chemical energy is converted into electrical energy.
Thus, a link can be predicted between cell potential, free energy change, and the equilibrium constant for the reaction. Cell potential can also be measured as the oxidant or the reducing strength, and similar acid-base strength measures are reflected in equilibrium...
Thermodynamics is the branch of physics dealing with the relationship between heat and other forms of energy. In an electrochemical cell, chemical energy is converted into electrical energy.
Thus, a link can be predicted between cell potential, free energy change, and the equilibrium constant for the reaction. Cell potential can also be measured as the oxidant or the reducing strength, and similar acid-base strength measures are reflected in equilibrium...
46.4K
01:13Enzymes and Activation Energy
23.5K
The activation energy (or free energy of activation), abbreviated as Ea, is the small amount of energy input necessary for all chemical reactions to occur. During chemical reactions, certain chemical bonds break, and new ones form. For example, when a glucose molecule breaks down, bonds between the molecule's carbon atoms break. Since these are energy-storing bonds, they release energy when broken. However, the molecule must be somewhat contorted to get into a state that allows the bonds to...
23.5K
01:21Free Energy
52.0K
Free energy—abbreviated as G for the scientist Gibbs who discovered it—is a measurement of useful energy that can be extracted from a reaction to do work. It is the energy in a chemical reaction that is available after entropy is accounted for. Reactions that take in energy are considered endergonic and reactions that release energy are exergonic. Plants carry out endergonic reactions by taking in sunlight and carbon dioxide to produce glucose and oxygen. Animals, in turn, break...
52.0K
03:25Free Energy Changes for Nonstandard States
13.6K
The free energy change for a process taking place with reactants and products present under nonstandard conditions (pressures other than 1 bar; concentrations other than 1 M) is related to the standard free energy change according to this equation:
13.6K