核输出蛋白是细胞核质运输中的重要蛋白。核输出蛋白1(export protein 1,XPO1)可介导包括p53在内的多种肿瘤抑制蛋白以及细胞周期调节蛋白的转运。抑制XPO1的转运功能可影响细胞增殖、分化、凋亡等过程,达到抗肿瘤目的。本文就核输出蛋...核输出蛋白是细胞核质运输中的重要蛋白。核输出蛋白1(export protein 1,XPO1)可介导包括p53在内的多种肿瘤抑制蛋白以及细胞周期调节蛋白的转运。抑制XPO1的转运功能可影响细胞增殖、分化、凋亡等过程,达到抗肿瘤目的。本文就核输出蛋白抑制剂在血液肿瘤常见基因突变和部分常用抗肿瘤药物耐药性方面的研究展开综述,探讨核输出蛋白抑制剂在血液肿瘤以及更多领域的应用。展开更多
近年来,随着我国输美食品的不断增长,美国食品药品监督管理局(Food and Drug Administration,FDA)不断加强对我国输美食品生产企业的检查力度。2016年质检总局(General Administration of Quality Supervision,AQSIQ)对65家出口食品生...近年来,随着我国输美食品的不断增长,美国食品药品监督管理局(Food and Drug Administration,FDA)不断加强对我国输美食品生产企业的检查力度。2016年质检总局(General Administration of Quality Supervision,AQSIQ)对65家出口食品生产企业接受检查案例进行调研,发现随着2011年美国《食品安全现代法》(Food Safety Modernization Act,FSMA)的颁布,美国FDA的检查要求日趋严格,检查范围逐年扩大,对我国输美食品生产企业造成较大影响。本文通过分析美国FDA对我国输美食品生产企业的检查内容,总结该检查对企业造成的主要影响,并提出了相应的应对建议和措施,旨在提醒我国输美食品生产企业沉着应对,依据相关法律法规,制定好"人、机、料、法、环"各个环节的规章制度并严格实施,促使企业顺利通过美国FDA的现场检查,使得对美贸易更加顺畅。展开更多
BACKGROUND: Cholecyst cholesterol lithiasis is a common disease of the digestive system; however, the cause of lithogenesis is still unclear. Although bile salt export pump (BSEP), multidrug resistance protein 2 (MRP2...BACKGROUND: Cholecyst cholesterol lithiasis is a common disease of the digestive system; however, the cause of lithogenesis is still unclear. Although bile salt export pump (BSEP), multidrug resistance protein 2 (MRP2), and multiple drug resistance 3 (MDR3 ) are 3 well-known transporting proteins, their effect on lithogenesis has not been elucidated. This study was undertaken to examine the relationship between BSEP, MRP2, MDR3, and cholesterol calculus formation. METHODS: Liver tissue specimens were taken from 20 patients with cholesterol calculus and from 10 patients with normal liver. mRNA and protein expressions of BSEP, MRP2, and MDR3 were determined by reverse tran-scriptase-polymerase chain reaction (RT-PCR) and Western blot, respectively. This study was approved by the ethics committee of China Medical University and informed consent was obtained from all patients. RESULTS: mRNA and protein expressions of BSEP, MRP2, and MDR3 were significantly down-regulated in the liver tissue of the patients with cholesterol calculus compared with normal liver tissue of the controls. CONCLUSION: The down-regulation of BSEP, MRP2, and MDR3 may be correlated with the formation of cholesterol calculus.展开更多
文摘核输出蛋白是细胞核质运输中的重要蛋白。核输出蛋白1(export protein 1,XPO1)可介导包括p53在内的多种肿瘤抑制蛋白以及细胞周期调节蛋白的转运。抑制XPO1的转运功能可影响细胞增殖、分化、凋亡等过程,达到抗肿瘤目的。本文就核输出蛋白抑制剂在血液肿瘤常见基因突变和部分常用抗肿瘤药物耐药性方面的研究展开综述,探讨核输出蛋白抑制剂在血液肿瘤以及更多领域的应用。
文摘近年来,随着我国输美食品的不断增长,美国食品药品监督管理局(Food and Drug Administration,FDA)不断加强对我国输美食品生产企业的检查力度。2016年质检总局(General Administration of Quality Supervision,AQSIQ)对65家出口食品生产企业接受检查案例进行调研,发现随着2011年美国《食品安全现代法》(Food Safety Modernization Act,FSMA)的颁布,美国FDA的检查要求日趋严格,检查范围逐年扩大,对我国输美食品生产企业造成较大影响。本文通过分析美国FDA对我国输美食品生产企业的检查内容,总结该检查对企业造成的主要影响,并提出了相应的应对建议和措施,旨在提醒我国输美食品生产企业沉着应对,依据相关法律法规,制定好"人、机、料、法、环"各个环节的规章制度并严格实施,促使企业顺利通过美国FDA的现场检查,使得对美贸易更加顺畅。
文摘BACKGROUND: Cholecyst cholesterol lithiasis is a common disease of the digestive system; however, the cause of lithogenesis is still unclear. Although bile salt export pump (BSEP), multidrug resistance protein 2 (MRP2), and multiple drug resistance 3 (MDR3 ) are 3 well-known transporting proteins, their effect on lithogenesis has not been elucidated. This study was undertaken to examine the relationship between BSEP, MRP2, MDR3, and cholesterol calculus formation. METHODS: Liver tissue specimens were taken from 20 patients with cholesterol calculus and from 10 patients with normal liver. mRNA and protein expressions of BSEP, MRP2, and MDR3 were determined by reverse tran-scriptase-polymerase chain reaction (RT-PCR) and Western blot, respectively. This study was approved by the ethics committee of China Medical University and informed consent was obtained from all patients. RESULTS: mRNA and protein expressions of BSEP, MRP2, and MDR3 were significantly down-regulated in the liver tissue of the patients with cholesterol calculus compared with normal liver tissue of the controls. CONCLUSION: The down-regulation of BSEP, MRP2, and MDR3 may be correlated with the formation of cholesterol calculus.
