G蛋白偶联受体家族卵巢癌G蛋白偶联受体1(ovarian cancer G protein-coupled receptor 1,OGR1)亚家族的OGR1、T细胞死亡偶联基因8(T-cell death associated gene 8,TDAG8)、G蛋白偶联受体4(G protein-coupled receptor 4,GPR4)及诱导细...G蛋白偶联受体家族卵巢癌G蛋白偶联受体1(ovarian cancer G protein-coupled receptor 1,OGR1)亚家族的OGR1、T细胞死亡偶联基因8(T-cell death associated gene 8,TDAG8)、G蛋白偶联受体4(G protein-coupled receptor 4,GPR4)及诱导细胞停滞于G2/M期的G蛋白偶联受体G2A(from G2 accumulation)4种受体是最新发现的一类质子感知受体.除了质子,体内又有它们各自特定的脂质分子配体活化这些受体来调节细胞机能.该类受体广泛分布于人的各种正常组织和肿瘤组织细胞中,在肿瘤的发生与转移、细胞骨架重组等生理病理过程中发挥双重作用.正常表达时它们有一定的抑制肿瘤作用,但这些受体的异常表达或过表达使某些组织和细胞恶性转化,导致肿瘤的发生.本文综述了在肿瘤组织的酸性微环境中,细胞表达的质子(pH)感知受体对肿瘤发生与肿瘤转移的调节作用及其相关的信号通路.展开更多
质子耦合电子转移(Proton coupled electron transfer,PCET)步骤存在于众多电催化与电合成反应中,通过调节PCET单元步骤来控制电催化反应热力学及动力学被证明是一种有效手段,同时,质子给/受体被证明是影响PCET反应的一个重要因素。本...质子耦合电子转移(Proton coupled electron transfer,PCET)步骤存在于众多电催化与电合成反应中,通过调节PCET单元步骤来控制电催化反应热力学及动力学被证明是一种有效手段,同时,质子给/受体被证明是影响PCET反应的一个重要因素。本文以电催化析氧、析氢、CO 2的电化学还原等典型电催化体系为例,探讨质子给/受体通过调控质子耦合电子转移单元步骤继而影响电催化反应的多种机制。展开更多
卵巢癌G蛋白偶联受体1 (ovarian cancer G protein-coupled receptor 1, OGR1)亚家族广泛分布于人体组织中,该受体具有质子敏感特性,可以通过受体组氨酸残基感知细胞外pH值变化,对人体细胞功能进行调节。质子感知受体不仅与肿瘤的发生...卵巢癌G蛋白偶联受体1 (ovarian cancer G protein-coupled receptor 1, OGR1)亚家族广泛分布于人体组织中,该受体具有质子敏感特性,可以通过受体组氨酸残基感知细胞外pH值变化,对人体细胞功能进行调节。质子感知受体不仅与肿瘤的发生、免疫系统、神经系统及血管系统等密切相关,还能调节成骨细胞骨形成和破骨细胞骨吸收来影响骨代谢。当骨形成和骨吸收动态平衡被打破以后,会导致骨量异常以及相关骨病的发生。本文就质子感知受体在骨代谢中的作用进行综述。展开更多
A series of novel imidazolium based ionic liquids containing the urea moiety were designed and synthesized for anion recognition. 1-Ethylurea-3-methylimidazolium acetate ([Eumim]OAc) was used as the receptor for the h...A series of novel imidazolium based ionic liquids containing the urea moiety were designed and synthesized for anion recognition. 1-Ethylurea-3-methylimidazolium acetate ([Eumim]OAc) was used as the receptor for the halides and complex anions (BF4-, PF6-, BPh4-). 1H NMR spectra showed that the urea protons and imidazolium C(2) proton of the receptor ([Eumim]OAc) moved upfield on addition of various anions. A Job plot showed that the [Eumim]OAc receptor formed a 1:1 complex with BPh4-. X-ray diffraction analysis and the molecular modeling study revealed that the conformations of [Eumim]OAc and [Eumim]BPh4 were different. The conformational change of the cation was caused by anion exchange, and may provide an alternative to current methods for recognition of anions.展开更多
The depletion potential between two colloid particles immersed in a hydrogen bonding fluid has been investigated by density functional theory. The study is motivated by the wide applications of hydrogen bonding fluids...The depletion potential between two colloid particles immersed in a hydrogen bonding fluid has been investigated by density functional theory. The study is motivated by the wide applications of hydrogen bonding fluids in the field of colloid science, and the effects of relevant factors on the depletion potential and depletion force between colloid particles have been studied. These factors include the size ratio of the colloid particle to the fluid molecule, the bulk density of the fluid, the functionality (the number of proton acceptors a and proton donors d) and hydrogen bonding strength as well as the colloid-fluid interaction energy. By comparing the depletion potential calculated under various conditions, it is shown that the effects of these factors on the depletion potential are very significant, and in particular in regulating the depletion force and its range.展开更多
文摘G蛋白偶联受体家族卵巢癌G蛋白偶联受体1(ovarian cancer G protein-coupled receptor 1,OGR1)亚家族的OGR1、T细胞死亡偶联基因8(T-cell death associated gene 8,TDAG8)、G蛋白偶联受体4(G protein-coupled receptor 4,GPR4)及诱导细胞停滞于G2/M期的G蛋白偶联受体G2A(from G2 accumulation)4种受体是最新发现的一类质子感知受体.除了质子,体内又有它们各自特定的脂质分子配体活化这些受体来调节细胞机能.该类受体广泛分布于人的各种正常组织和肿瘤组织细胞中,在肿瘤的发生与转移、细胞骨架重组等生理病理过程中发挥双重作用.正常表达时它们有一定的抑制肿瘤作用,但这些受体的异常表达或过表达使某些组织和细胞恶性转化,导致肿瘤的发生.本文综述了在肿瘤组织的酸性微环境中,细胞表达的质子(pH)感知受体对肿瘤发生与肿瘤转移的调节作用及其相关的信号通路.
文摘质子耦合电子转移(Proton coupled electron transfer,PCET)步骤存在于众多电催化与电合成反应中,通过调节PCET单元步骤来控制电催化反应热力学及动力学被证明是一种有效手段,同时,质子给/受体被证明是影响PCET反应的一个重要因素。本文以电催化析氧、析氢、CO 2的电化学还原等典型电催化体系为例,探讨质子给/受体通过调控质子耦合电子转移单元步骤继而影响电催化反应的多种机制。
文摘卵巢癌G蛋白偶联受体1 (ovarian cancer G protein-coupled receptor 1, OGR1)亚家族广泛分布于人体组织中,该受体具有质子敏感特性,可以通过受体组氨酸残基感知细胞外pH值变化,对人体细胞功能进行调节。质子感知受体不仅与肿瘤的发生、免疫系统、神经系统及血管系统等密切相关,还能调节成骨细胞骨形成和破骨细胞骨吸收来影响骨代谢。当骨形成和骨吸收动态平衡被打破以后,会导致骨量异常以及相关骨病的发生。本文就质子感知受体在骨代谢中的作用进行综述。
基金supported by the National Natural Science Foundation of China (20873041 and 21072061)Shanghai Leading Academic Discipline Project (B409)
文摘A series of novel imidazolium based ionic liquids containing the urea moiety were designed and synthesized for anion recognition. 1-Ethylurea-3-methylimidazolium acetate ([Eumim]OAc) was used as the receptor for the halides and complex anions (BF4-, PF6-, BPh4-). 1H NMR spectra showed that the urea protons and imidazolium C(2) proton of the receptor ([Eumim]OAc) moved upfield on addition of various anions. A Job plot showed that the [Eumim]OAc receptor formed a 1:1 complex with BPh4-. X-ray diffraction analysis and the molecular modeling study revealed that the conformations of [Eumim]OAc and [Eumim]BPh4 were different. The conformational change of the cation was caused by anion exchange, and may provide an alternative to current methods for recognition of anions.
基金supported by the National Natural Science Foundation of China (20873035)
文摘The depletion potential between two colloid particles immersed in a hydrogen bonding fluid has been investigated by density functional theory. The study is motivated by the wide applications of hydrogen bonding fluids in the field of colloid science, and the effects of relevant factors on the depletion potential and depletion force between colloid particles have been studied. These factors include the size ratio of the colloid particle to the fluid molecule, the bulk density of the fluid, the functionality (the number of proton acceptors a and proton donors d) and hydrogen bonding strength as well as the colloid-fluid interaction energy. By comparing the depletion potential calculated under various conditions, it is shown that the effects of these factors on the depletion potential are very significant, and in particular in regulating the depletion force and its range.
