Low-density lipoprotein receptor-related protein 1(LRP1,also known as CD91),a multifunctional endocytic and cell signaling receptor,is widely expressed on the surface of multiple cell types such as hepatocytes,fibrobl...Low-density lipoprotein receptor-related protein 1(LRP1,also known as CD91),a multifunctional endocytic and cell signaling receptor,is widely expressed on the surface of multiple cell types such as hepatocytes,fibroblasts,neurons,astrocytes,macrophages,smooth muscle cells,and malignant cells.Emerging in vitro and in vivo evidence demonstrates that LRP1 is critically involved in many processes that drive tumorigenesis and tumor progression.For example,LRP1 not only promotes tumor cell migration and invasion by regulating matrix metalloproteinase(MMP)-2and MMP-9 expression and functions but also inhibits cell apoptosis by regulating the insulin receptor,the serine/threonine protein kinase signaling pathway,and the expression of Caspase-3.LRPI-mediated phosphorylation of the extracellular signal-regulated kinase pathway and c-jun N-terminal kinase are also involved in tumor cell proliferation and invasion.In addition,LRP1 has been shown to be down-regulated by microRNA-205 and methylation of LRP1CpG islands.Furthermore,a novel fusion gene,LRP1-SNRNP25,promotes osteosarcoma cell invasion and migration.Only by understanding the mechanisms of these effects can we develop novel diagnostic and therapeutic strategies for cancers mediated by LRP1.展开更多
目的:探讨非受体型蛋白酪氨酸磷酸酶6(non-receptor protein tyrosine phosphatase 6,PTPN6)基因在不同食管鳞状细胞癌细胞株中的表达及其对Eca109、Yes-2细胞恶性生物学行为的影响。方法:应用qPCR法检测不同食管鳞癌细胞株(TE1、Eca109...目的:探讨非受体型蛋白酪氨酸磷酸酶6(non-receptor protein tyrosine phosphatase 6,PTPN6)基因在不同食管鳞状细胞癌细胞株中的表达及其对Eca109、Yes-2细胞恶性生物学行为的影响。方法:应用qPCR法检测不同食管鳞癌细胞株(TE1、Eca109、Kyse150、Kyse170、Yes-2)中PTPN6 m RNA的表达水平,以pcDNA3.1-PTPN6质粒分别瞬时转染食管鳞癌细胞株Eca109和Yes-2,应用qPCR和Wb法检测PTPN6 m RNA和蛋白的表达水平,并应用MTS、克隆形成实验、划痕实验和Transwell法检测过表达PTPN6基因对食管鳞癌细胞恶性生物学行为的影响。结果:PTPN6基因在5种食管鳞癌细胞侏中表达均明显下调(均P<0.05)。与转染空载体的对照组相比,经pcDNA3.1-PTPN6转染后,Eca109和Yes-2细胞均高水平表达PTPN6(P<0.05或P<0.01);过表达PTPN6基因后,Eca109和Yes-2细胞的增殖、迁移和侵袭能力均明显被抑制(均P<0.05)。结论:PTPN6基因高表达能抑制食管鳞癌细胞的增殖、迁移和侵袭,其可能是影响食管鳞癌细胞生物学特性的一个重要因素。展开更多
目的:探讨染色质解旋酶DNA结合蛋白1样基因(chromodomain helicase/ATPase DNA binding protein 1-like gene,CHD1L)对前列腺癌细胞侵袭、迁移能力的影响及其可能的作用机制。方法:采用实时荧光定量PCR技术检测前列腺癌细胞株LNCAP、PC3...目的:探讨染色质解旋酶DNA结合蛋白1样基因(chromodomain helicase/ATPase DNA binding protein 1-like gene,CHD1L)对前列腺癌细胞侵袭、迁移能力的影响及其可能的作用机制。方法:采用实时荧光定量PCR技术检测前列腺癌细胞株LNCAP、PC3、DU145以及前列腺上皮细胞株RWPE-1中CHD1L mRNA表达水平;转染siRNA干扰前列腺癌PC3细胞CHD1L的表达,并用Transwell侵袭实验和划痕实验分析沉默CHD1L对前列腺癌细胞侵袭和迁移能力的影响;Western blotting检测PC3细胞MMP-9、N-钙黏蛋白和E-钙黏蛋白的表达水平。结果:CHD1L mRNA在前列腺癌细胞中的表达水平明显高于前列腺上皮细胞(P<0.01),其中以前列腺癌PC3细胞的表达水平最高。侵袭实验中,干扰组的穿膜细胞数明显低于阴性对照组和空白对照组[(49.67±6.67)vs(113.67±5.69)和(112.00±12.49)个,P<0.05)。划痕实验中,干扰组48 h伤口愈合率也低于阴性对照组和空白对照组[(21.27±3.27)%vs(48.47±5.72)%和(49.93±3.35)%,P<0.05]。干扰组细胞MMP-9和N-钙黏蛋白表达下调,E-钙黏蛋白表达上调。结论:沉默CHD1L可降低前列腺癌PC3细胞的侵袭迁移能力,该作用可能是通过调控MMP-9和EMT相关蛋白表达实现的。展开更多
迁移侵袭抑制蛋白(migration and invasion inhibitory protein,MIIP),是近年来研究发现的潜在肿瘤转移抑制基因,定位于1p36,该区域在多种肿瘤中缺失。MIIP的定位提示其可能在肿瘤侵袭、转移中发挥作用,并且已有研究报道MIIP可抑制胶质...迁移侵袭抑制蛋白(migration and invasion inhibitory protein,MIIP),是近年来研究发现的潜在肿瘤转移抑制基因,定位于1p36,该区域在多种肿瘤中缺失。MIIP的定位提示其可能在肿瘤侵袭、转移中发挥作用,并且已有研究报道MIIP可抑制胶质瘤及乳腺癌的侵袭转移。本文就MIIP通过HDAC6在肿瘤侵袭转移中的作用及其分子机制作一综述。展开更多
基金the National Natural Science Foundation of China(81372872 to J.Yang,81402215 to X.Du,and 81320108022 to K.Chen)funds from the University Cancer Foundation via the Sister Institution Network Fund at the Tianjin Medical University Cancer Institute and Hospital,Fudan University Shanghai Cancer Center,and University of Texas MD Anderson Cancer Centersupported by the program for Innovative Research Team in University in China(IRT1076 to K.Chen)
文摘Low-density lipoprotein receptor-related protein 1(LRP1,also known as CD91),a multifunctional endocytic and cell signaling receptor,is widely expressed on the surface of multiple cell types such as hepatocytes,fibroblasts,neurons,astrocytes,macrophages,smooth muscle cells,and malignant cells.Emerging in vitro and in vivo evidence demonstrates that LRP1 is critically involved in many processes that drive tumorigenesis and tumor progression.For example,LRP1 not only promotes tumor cell migration and invasion by regulating matrix metalloproteinase(MMP)-2and MMP-9 expression and functions but also inhibits cell apoptosis by regulating the insulin receptor,the serine/threonine protein kinase signaling pathway,and the expression of Caspase-3.LRPI-mediated phosphorylation of the extracellular signal-regulated kinase pathway and c-jun N-terminal kinase are also involved in tumor cell proliferation and invasion.In addition,LRP1 has been shown to be down-regulated by microRNA-205 and methylation of LRP1CpG islands.Furthermore,a novel fusion gene,LRP1-SNRNP25,promotes osteosarcoma cell invasion and migration.Only by understanding the mechanisms of these effects can we develop novel diagnostic and therapeutic strategies for cancers mediated by LRP1.
文摘目的:探讨非受体型蛋白酪氨酸磷酸酶6(non-receptor protein tyrosine phosphatase 6,PTPN6)基因在不同食管鳞状细胞癌细胞株中的表达及其对Eca109、Yes-2细胞恶性生物学行为的影响。方法:应用qPCR法检测不同食管鳞癌细胞株(TE1、Eca109、Kyse150、Kyse170、Yes-2)中PTPN6 m RNA的表达水平,以pcDNA3.1-PTPN6质粒分别瞬时转染食管鳞癌细胞株Eca109和Yes-2,应用qPCR和Wb法检测PTPN6 m RNA和蛋白的表达水平,并应用MTS、克隆形成实验、划痕实验和Transwell法检测过表达PTPN6基因对食管鳞癌细胞恶性生物学行为的影响。结果:PTPN6基因在5种食管鳞癌细胞侏中表达均明显下调(均P<0.05)。与转染空载体的对照组相比,经pcDNA3.1-PTPN6转染后,Eca109和Yes-2细胞均高水平表达PTPN6(P<0.05或P<0.01);过表达PTPN6基因后,Eca109和Yes-2细胞的增殖、迁移和侵袭能力均明显被抑制(均P<0.05)。结论:PTPN6基因高表达能抑制食管鳞癌细胞的增殖、迁移和侵袭,其可能是影响食管鳞癌细胞生物学特性的一个重要因素。
文摘迁移侵袭抑制蛋白(migration and invasion inhibitory protein,MIIP),是近年来研究发现的潜在肿瘤转移抑制基因,定位于1p36,该区域在多种肿瘤中缺失。MIIP的定位提示其可能在肿瘤侵袭、转移中发挥作用,并且已有研究报道MIIP可抑制胶质瘤及乳腺癌的侵袭转移。本文就MIIP通过HDAC6在肿瘤侵袭转移中的作用及其分子机制作一综述。
