We investigated the effects of transient receptor potential M8(TRPM8)channel on the proliferation and motility of androgen-independent prostate cancer PC-3 cells.After being permanently transfected with an empty vecto...We investigated the effects of transient receptor potential M8(TRPM8)channel on the proliferation and motility of androgen-independent prostate cancer PC-3 cells.After being permanently transfected with an empty vector and cDNA encoding the TRPM8 protein,cells were analysed for cell cycle distribution and motility using flow cytometry and scratch assay.Immunocytochemistry and Ca^(2+)imaging analysis revealed the overexpression of functional TRPM8 channel on both endoplasmic reticulum and plasma membrane of PC-3-TRPM8 cells.Cell cycle distribution and scratch assay analysis revealed that TRPM8 induced cell cycle arrest at the G_(0)/G_(1)stage(P<0.05)and facilitated the cell apoptosis induced by starvation(P<0.05).Furthermore,TRPM8 inhibited the migration of PC-3-TRPM8 cells(P<0.01)through the inactivation of focal-adhesion kinase.It appears that TRPM8 was not essential for the survival of PC-3 cells;however,the overexpression of TRPM8 had negative effects on the proliferation and migration of PC-3 cells.Thus,TRPM8 and its agonists may serve as important targets for the treatment of prostate cancer.展开更多
Nociception is an important physiological process that detects harmful signals and results in pain perception. In this review, we discuss important experimental evidence involving some TRP ion channels as molecular se...Nociception is an important physiological process that detects harmful signals and results in pain perception. In this review, we discuss important experimental evidence involving some TRP ion channels as molecular sensors of chemical, thermal, and mechanical noxious stimuli to evoke the pain and itch sensations. Among them are the TRPA1 channel, members of the vanilloid subfamily （TRPV1, TRPV3, and TRPV4）, and finally members of the melastatin group （TRPM2, TRPM3, and TRPMS）. Given that pain and itch are pro-survival, evolutionarily-honed protective mechanisms, care has to be exercised when developing inhibitory/modulatory com- pounds targeting specific pain/itch-TRPs so that physio- logical protective mechanisms are not disabled to a degree that stimulus-mediated injury can occur. Such events have impeded the development of safe and effective TRPV1- modulating compounds and have diverted substantial resources. A beneficial outcome can be readily accom- plished via simple dosing strategies, and also by incorpo- rating medicinal chemistry design features during compound design and synthesis. Beyond clinical use, where compounds that target more than one channel might have a place and possibly have advantageous features, highly specific and high-potency compounds will be helpful in mechanistic discovery at the structure-function level.展开更多
目的筛选广金钱草挥发油抗炎作用的关键化学成分及靶标蛋白。方法采用水蒸气蒸馏法提取广金钱草中的挥发油,通过气相色谱-质谱联用法鉴定其化学成分,采用峰面积归一化法测定其化学成分的相对含量。基于中药系统药理学技术平台(Tradition...目的筛选广金钱草挥发油抗炎作用的关键化学成分及靶标蛋白。方法采用水蒸气蒸馏法提取广金钱草中的挥发油,通过气相色谱-质谱联用法鉴定其化学成分,采用峰面积归一化法测定其化学成分的相对含量。基于中药系统药理学技术平台(Traditional Chinese Medicine Systems Pharmacology,TCMSP)建立小分子配体库,借助Swiss Target Prediction在线进行反向靶标预测,通过KOBAX 3.0筛选抗炎通路,采用分子对接技术(SYBYL 2.1)将关键小分子与瞬时受体电位(TRP)通路中的靶标蛋白进行能量匹配,基于Cytoscape3.5.1构建化学成分-靶标网络模型。结果从广金钱草挥发油中共检测出48个色谱峰,通过质谱库及文献检索确定33种化合物结构,占挥发油总量的90.1%。关键化学成分17个,共筛选出88个靶标蛋白,TRP通路包括11个潜在靶标。分子对接发现叶绿醇、三十一烷、法尼基丙酮和角鲨烯等为广金钱草挥发油发挥抗炎作用的关键化学成分。TPRV1、PRKCB和PRKCD为抗炎关键靶标蛋白。结论初步筛选了广金钱草挥发油抗炎的关键靶点及活性成分,为其产品的开发和应用提供理论依据。展开更多
During the last decade, transient receptor potential （TRP） channels emerge as key proteins in central mechanisms of the carcinogenesis such as cell proliferation, apoptosis and migration. Initial studies showed that...During the last decade, transient receptor potential （TRP） channels emerge as key proteins in central mechanisms of the carcinogenesis such as cell proliferation, apoptosis and migration. Initial studies showed that expression profile of some TRP channels, notably TRP melastatin 8 （TRPM8）, TRP vanilloid 6 （TRPV6）,TRP canonical （TRPC6） and TRPV2, is changing during the development and the progression of prostate cancer towards the hormone-refractory stages. The link between the change in expression levels and the functional role of these channels in prostate cancer is step by step being elucidated. These recent advances are here described and discussed.展开更多
基金the Natural Science Foundation of Guangdong Province,China(No.7001197)National Natural Science Foundation of China(No.30872572)We thank Dr David Julius,Department of Cellular and Molecular Pharmacology,University of California,San Francisco,USA,for the gift of the rat TRPM8 cDNA construct,which was critical for the completion of this study.
文摘We investigated the effects of transient receptor potential M8(TRPM8)channel on the proliferation and motility of androgen-independent prostate cancer PC-3 cells.After being permanently transfected with an empty vector and cDNA encoding the TRPM8 protein,cells were analysed for cell cycle distribution and motility using flow cytometry and scratch assay.Immunocytochemistry and Ca^(2+)imaging analysis revealed the overexpression of functional TRPM8 channel on both endoplasmic reticulum and plasma membrane of PC-3-TRPM8 cells.Cell cycle distribution and scratch assay analysis revealed that TRPM8 induced cell cycle arrest at the G_(0)/G_(1)stage(P<0.05)and facilitated the cell apoptosis induced by starvation(P<0.05).Furthermore,TRPM8 inhibited the migration of PC-3-TRPM8 cells(P<0.01)through the inactivation of focal-adhesion kinase.It appears that TRPM8 was not essential for the survival of PC-3 cells;however,the overexpression of TRPM8 had negative effects on the proliferation and migration of PC-3 cells.Thus,TRPM8 and its agonists may serve as important targets for the treatment of prostate cancer.
基金supported by the National Institutes of Health,USA(DE018549,UL1TR001117,P30AR066527,and AR48182 to WL,AR48182-S1 to WL as co-investigatorF33DE024668 and K12DE022793 to YC)+1 种基金the US Department of Defense(W81XWH-13-1-0299 to WL)the Harrington Discovery Institute,Cleveland OH(to WL)
文摘Nociception is an important physiological process that detects harmful signals and results in pain perception. In this review, we discuss important experimental evidence involving some TRP ion channels as molecular sensors of chemical, thermal, and mechanical noxious stimuli to evoke the pain and itch sensations. Among them are the TRPA1 channel, members of the vanilloid subfamily （TRPV1, TRPV3, and TRPV4）, and finally members of the melastatin group （TRPM2, TRPM3, and TRPMS）. Given that pain and itch are pro-survival, evolutionarily-honed protective mechanisms, care has to be exercised when developing inhibitory/modulatory com- pounds targeting specific pain/itch-TRPs so that physio- logical protective mechanisms are not disabled to a degree that stimulus-mediated injury can occur. Such events have impeded the development of safe and effective TRPV1- modulating compounds and have diverted substantial resources. A beneficial outcome can be readily accom- plished via simple dosing strategies, and also by incorpo- rating medicinal chemistry design features during compound design and synthesis. Beyond clinical use, where compounds that target more than one channel might have a place and possibly have advantageous features, highly specific and high-potency compounds will be helpful in mechanistic discovery at the structure-function level.
文摘目的筛选广金钱草挥发油抗炎作用的关键化学成分及靶标蛋白。方法采用水蒸气蒸馏法提取广金钱草中的挥发油,通过气相色谱-质谱联用法鉴定其化学成分,采用峰面积归一化法测定其化学成分的相对含量。基于中药系统药理学技术平台(Traditional Chinese Medicine Systems Pharmacology,TCMSP)建立小分子配体库,借助Swiss Target Prediction在线进行反向靶标预测,通过KOBAX 3.0筛选抗炎通路,采用分子对接技术(SYBYL 2.1)将关键小分子与瞬时受体电位(TRP)通路中的靶标蛋白进行能量匹配,基于Cytoscape3.5.1构建化学成分-靶标网络模型。结果从广金钱草挥发油中共检测出48个色谱峰,通过质谱库及文献检索确定33种化合物结构,占挥发油总量的90.1%。关键化学成分17个,共筛选出88个靶标蛋白,TRP通路包括11个潜在靶标。分子对接发现叶绿醇、三十一烷、法尼基丙酮和角鲨烯等为广金钱草挥发油发挥抗炎作用的关键化学成分。TPRV1、PRKCB和PRKCD为抗炎关键靶标蛋白。结论初步筛选了广金钱草挥发油抗炎的关键靶点及活性成分,为其产品的开发和应用提供理论依据。
文摘During the last decade, transient receptor potential （TRP） channels emerge as key proteins in central mechanisms of the carcinogenesis such as cell proliferation, apoptosis and migration. Initial studies showed that expression profile of some TRP channels, notably TRP melastatin 8 （TRPM8）, TRP vanilloid 6 （TRPV6）,TRP canonical （TRPC6） and TRPV2, is changing during the development and the progression of prostate cancer towards the hormone-refractory stages. The link between the change in expression levels and the functional role of these channels in prostate cancer is step by step being elucidated. These recent advances are here described and discussed.
