We present here the first observation of cathodoluminescence (CL) images of Met.(Cu, Ag)-TCNQ anion radical salts organic thin films which were prepared in sat urated TCNQ/CH3CN liquid-phase by self-growth. The erperi...We present here the first observation of cathodoluminescence (CL) images of Met.(Cu, Ag)-TCNQ anion radical salts organic thin films which were prepared in sat urated TCNQ/CH3CN liquid-phase by self-growth. The erperiments were carried out by means of Hitachi S-450 type scanning electron microscopy(SEM). Comparsion of CL images with secondary electron(SE) images of the same point on the organic thin film indicates that the shape of Met.(Cu, Ag)-TCNQ in CL images corresponds very well to that in the SE images. The results observed also shows that the CL intensity of CuTCNQ is stronger than that of AgTCNQ under the same experimental conditions. Based on the above results, a brief discussion about the preliminary mechanism of CL from Met.(Cu,Ag)-TCNQ has been given.展开更多
目的观察黄芪建中汤对脾胃虚寒证胃溃疡大鼠炎症因子及HGF/c-Met信号通路的影响。方法将60只大鼠随机分为4组,即正常组、模型组、黄芪建中汤组[黄芪建中汤6.8 g/(kg·d)]、奥美拉唑组[奥美拉唑肠溶胶囊4.2 mg/(kg·d)],每组15...目的观察黄芪建中汤对脾胃虚寒证胃溃疡大鼠炎症因子及HGF/c-Met信号通路的影响。方法将60只大鼠随机分为4组,即正常组、模型组、黄芪建中汤组[黄芪建中汤6.8 g/(kg·d)]、奥美拉唑组[奥美拉唑肠溶胶囊4.2 mg/(kg·d)],每组15只大鼠。正常组除外,其他组采用耗气破气法结合饥饱失常法进行大鼠脾胃虚寒证模型造模,再采用冰醋酸法建立大鼠胃溃疡模型。比较各组大鼠体质量、溃疡指数;HE染色观察大鼠胃组织病理学变化;采用酶联免疫吸附法检测血清中白细胞介素-6(IL-6)、白细胞介素-1β(IL-1β)、肿瘤坏死因子-α(TNF-α)含量;免疫组化法检测胃组织中肝细胞生长因子(HGF)、肝细胞生长因子受体(c-Met)表达;荧光定量PCR检测胃组织HGF、c-Met m RNA水平。结果与正常组相比,模型组大鼠体质量降低,溃疡指数升高,IL-6、IL-1β、TNF-α含量升高,HGF升高,HGF、c-Met m RNA升高(P<0.05);与模型组相比,黄芪建中汤组和奥美拉唑组大鼠体质量升高,溃疡指数降低,IL-6、IL-1β、TNF-α降低,HGF升高,HGF、c-Met mRNA升高(P<0.05)。结论黄芪建中汤可以通过抑制炎症因子、调节HGF/c-Met通路的表达促进胃黏膜修复。展开更多
Gastric cancer is among the most frequently occurring cancers and a leading cause of cancer-related deaths globally.Because gastric cancer is highly heterogenous and comprised of different subtypes with distinct molec...Gastric cancer is among the most frequently occurring cancers and a leading cause of cancer-related deaths globally.Because gastric cancer is highly heterogenous and comprised of different subtypes with distinct molecular and clinical characteristics,the management of gastric cancer calls for better-defined,biomarker-guided,molecular-based treatment strategies.MET is a receptor tyrosine kinase mediating important physiologic processes,such as embryogenesis,tissue regeneration,and wound healing.However,mounting evidence suggests that aberrant MET pathway activation contributes to tumour proliferation and metastasis in multiple cancer types,including gastric cancer,and is associated with poor patient outcomes.As such,MET-targeting therapies are being actively developed and promising progress has been demonstrated,especially with MET tyrosine kinase inhibitors.This review aims to briefly introduce the role of MET alterations in gastric cancer and summarize in detail the current progress of MET tyrosine kinase inhibitors in this disease area with a focus on savolitinib,tepotinib,capmatinib,and crizotinib.Building on current knowledge,this review further discusses existing challenges in MET alterations testing,possible resistance mechanisms to MET inhibitors,and future directions of MET-targeting therapies.展开更多
BACKGROUND Cognitive reserve(CR)and the catechol-O-methyltransferase(COMT)Val/Met polymorphism are reportedly linked to negative symptoms in schizophrenia.However,the regulatory effect of the COMT genotype on the rela...BACKGROUND Cognitive reserve(CR)and the catechol-O-methyltransferase(COMT)Val/Met polymorphism are reportedly linked to negative symptoms in schizophrenia.However,the regulatory effect of the COMT genotype on the relationship between CR and negative symptoms is still unexamined.AIM To investigate whether the relationship between CR and negative symptoms could be regulated by the COMT Val/Met polymorphism.METHODS In a cross-sectional study,54 clinically stable patients with schizophrenia underwent assessments for the COMT genotype,CR,and negative symptoms.CR was estimated using scores in the information and similarities subtests of a short form of the Chinese version of the Wechsler Adult Intelligence Scale.RESULTS COMT Met-carriers exhibited fewer negative symptoms than Val homozygotes.In the total sample,significant negative correlations were found between negative symptoms and information,similarities.Associations between information,similarities and negative symptoms were observed in Val homozygotes only,with information and similarities showing interaction effects with the COMT genotype in relation to negative symptoms(information,β=-0.282,95%CI:-0.552 to-0.011,P=0.042;similarities,β=-0.250,95%CI:-0.495 to-0.004,P=0.046).CONCLUSION This study provides initial evidence that the association between negative symptoms and CR is under the regulation of the COMT genotype in schizophrenia.展开更多
文摘We present here the first observation of cathodoluminescence (CL) images of Met.(Cu, Ag)-TCNQ anion radical salts organic thin films which were prepared in sat urated TCNQ/CH3CN liquid-phase by self-growth. The erperiments were carried out by means of Hitachi S-450 type scanning electron microscopy(SEM). Comparsion of CL images with secondary electron(SE) images of the same point on the organic thin film indicates that the shape of Met.(Cu, Ag)-TCNQ in CL images corresponds very well to that in the SE images. The results observed also shows that the CL intensity of CuTCNQ is stronger than that of AgTCNQ under the same experimental conditions. Based on the above results, a brief discussion about the preliminary mechanism of CL from Met.(Cu,Ag)-TCNQ has been given.
文摘目的观察黄芪建中汤对脾胃虚寒证胃溃疡大鼠炎症因子及HGF/c-Met信号通路的影响。方法将60只大鼠随机分为4组,即正常组、模型组、黄芪建中汤组[黄芪建中汤6.8 g/(kg·d)]、奥美拉唑组[奥美拉唑肠溶胶囊4.2 mg/(kg·d)],每组15只大鼠。正常组除外,其他组采用耗气破气法结合饥饱失常法进行大鼠脾胃虚寒证模型造模,再采用冰醋酸法建立大鼠胃溃疡模型。比较各组大鼠体质量、溃疡指数;HE染色观察大鼠胃组织病理学变化;采用酶联免疫吸附法检测血清中白细胞介素-6(IL-6)、白细胞介素-1β(IL-1β)、肿瘤坏死因子-α(TNF-α)含量;免疫组化法检测胃组织中肝细胞生长因子(HGF)、肝细胞生长因子受体(c-Met)表达;荧光定量PCR检测胃组织HGF、c-Met m RNA水平。结果与正常组相比,模型组大鼠体质量降低,溃疡指数升高,IL-6、IL-1β、TNF-α含量升高,HGF升高,HGF、c-Met m RNA升高(P<0.05);与模型组相比,黄芪建中汤组和奥美拉唑组大鼠体质量升高,溃疡指数降低,IL-6、IL-1β、TNF-α降低,HGF升高,HGF、c-Met mRNA升高(P<0.05)。结论黄芪建中汤可以通过抑制炎症因子、调节HGF/c-Met通路的表达促进胃黏膜修复。
基金supported by the National Natural Science Foundation of China(Grant No.81602057)the Beijing Natural Science Foundation(Grant No.Z210015)。
文摘Gastric cancer is among the most frequently occurring cancers and a leading cause of cancer-related deaths globally.Because gastric cancer is highly heterogenous and comprised of different subtypes with distinct molecular and clinical characteristics,the management of gastric cancer calls for better-defined,biomarker-guided,molecular-based treatment strategies.MET is a receptor tyrosine kinase mediating important physiologic processes,such as embryogenesis,tissue regeneration,and wound healing.However,mounting evidence suggests that aberrant MET pathway activation contributes to tumour proliferation and metastasis in multiple cancer types,including gastric cancer,and is associated with poor patient outcomes.As such,MET-targeting therapies are being actively developed and promising progress has been demonstrated,especially with MET tyrosine kinase inhibitors.This review aims to briefly introduce the role of MET alterations in gastric cancer and summarize in detail the current progress of MET tyrosine kinase inhibitors in this disease area with a focus on savolitinib,tepotinib,capmatinib,and crizotinib.Building on current knowledge,this review further discusses existing challenges in MET alterations testing,possible resistance mechanisms to MET inhibitors,and future directions of MET-targeting therapies.
基金Supported by the National Natural Science Foundation of China,No.81971250 and No.82171501Beijing Hospitals Authority Clinical Medicine Development of Special Funding Support,No.ZLRK202335Early Psychosis Cohort Program of Beijing Anding Hospital,No.ADDL-03.
文摘BACKGROUND Cognitive reserve(CR)and the catechol-O-methyltransferase(COMT)Val/Met polymorphism are reportedly linked to negative symptoms in schizophrenia.However,the regulatory effect of the COMT genotype on the relationship between CR and negative symptoms is still unexamined.AIM To investigate whether the relationship between CR and negative symptoms could be regulated by the COMT Val/Met polymorphism.METHODS In a cross-sectional study,54 clinically stable patients with schizophrenia underwent assessments for the COMT genotype,CR,and negative symptoms.CR was estimated using scores in the information and similarities subtests of a short form of the Chinese version of the Wechsler Adult Intelligence Scale.RESULTS COMT Met-carriers exhibited fewer negative symptoms than Val homozygotes.In the total sample,significant negative correlations were found between negative symptoms and information,similarities.Associations between information,similarities and negative symptoms were observed in Val homozygotes only,with information and similarities showing interaction effects with the COMT genotype in relation to negative symptoms(information,β=-0.282,95%CI:-0.552 to-0.011,P=0.042;similarities,β=-0.250,95%CI:-0.495 to-0.004,P=0.046).CONCLUSION This study provides initial evidence that the association between negative symptoms and CR is under the regulation of the COMT genotype in schizophrenia.
