目的:探讨Wnt/PCP信号通路与细胞外基质(extracellular matrix,ECM)共同调控钙调蛋白2(calponin 2,CNN2)在促进肝癌细胞群体性迁移中的作用及其分子机制。方法:结合癌症基因组图谱(The Cancer Genome Atlas,TCGA)与人类蛋白图谱(Human P...目的:探讨Wnt/PCP信号通路与细胞外基质(extracellular matrix,ECM)共同调控钙调蛋白2(calponin 2,CNN2)在促进肝癌细胞群体性迁移中的作用及其分子机制。方法:结合癌症基因组图谱(The Cancer Genome Atlas,TCGA)与人类蛋白图谱(Human Protein Atlas,HPA)分析CNN2在不同组织中的表达特征,并通过组织芯片评估其在肝癌中的表达水平及预后相关性;采用迁移与划痕实验探讨CNN2对肝癌细胞迁移能力的影响,进一步通过shRNA慢病毒降低Wnt11及CNN2表达,研究Wnt/PCP信号通路对CNN2的调控作用及其分子机制;最后以硬质培养基模拟ECM环境,探讨其与CNN2表达及细胞迁移能力之间的关联。结果:CNN2在肝癌组织中高表达,富集于肿瘤边缘区域,提示其可能在肿瘤细胞迁移早期阶段发挥关键作用。功能实验进一步证实,CNN2显著促进肝癌细胞的群体性迁移,其高表达水平与患者不良预后显著相关。在机制层面,CNN2受Wnt/PCP信号通路调控,且在模拟ECM力学环境下表达显著上调,提示其在肿瘤细胞感知和响应力学信号过程中具有重要功能。结论:Wnt/PCP信号通路调控CNN2的表达与功能,同时CNN2作为力学信号介导因子受ECM力学信号调控,二者协同驱动肝癌细胞的群体性迁移。展开更多
Vesicle Protein Sorting 35(VPS35)is a novel oncogene that promotes tumor growth through the PI3K/AKT signaling in hepatocellular carcinoma(HCC).However,the role of VPS35 in HCC metastasis and the underlying mechanisms...Vesicle Protein Sorting 35(VPS35)is a novel oncogene that promotes tumor growth through the PI3K/AKT signaling in hepatocellular carcinoma(HCC).However,the role of VPS35 in HCC metastasis and the underlying mechanisms remain largely unclear.In this study,we observed that overexpression of VPS35 enhanced hepatoma cell invasion and metastasis by inducing epithelialemesenchymal transition(EMT)-related gene expression.Conversely,knockout of VPS35 significantly inhibited hepatoma cell migration and invasion.Furthermore,depletion of VPS35 decreased the lung metastasis of HCC in nude mice.By transcriptome analysis,we determined that VPS35 promoted HCC metastasis by activating the Wnt/non-canonical planar cell polarity(PCP)pathway.Mechanistically,VPS35 activated the PCP pathway by regulating membrane sorting and trafficking of Frizzled-2(FZD2)and ROR1 in hepatoma cells.Collectively,our results indicate that VPS35 promotes HCC metastasis via enhancing the Wnt/PCP signaling,thus providing a potential prognostic marker and therapeutic target for HCC.展开更多
Schwann cells play a critical role in peripheral nerve regeneration through dedifferentiation and proliferation. In a previous study, we performed microarray analysis of the sciatic nerve after injury. Accordingly, we...Schwann cells play a critical role in peripheral nerve regeneration through dedifferentiation and proliferation. In a previous study, we performed microarray analysis of the sciatic nerve after injury. Accordingly, we predicted that long non-coding RNA NONMMUG014387 may promote Schwann cell proliferation after peripheral nerve injury, as bioinformatic analysis revealed that the target gene of NONMMUG014387 was collagen triple helix repeat containing 1（Cthrc1）. Cthrc1 may promote cell proliferation in a variety of cells by activating Wnt/PCP signaling. Nonetheless, bioinformatic analysis still needs to be verified by biological experiment. In this study, the candidate long non-coding RNA, NONMMUG014387, was overexpressed in mouse Schwann cells by recombinant adenovirus transfection. Plasmid p HBAd-MCMV-GFP-NONMMUG014387 and p HBAd-MCMV-GFP were transfected into Schwann cells. Schwann cells were divided into three groups： control（Schwann cells without intervention）, Ad-GFP（Schwann cells with GFP overexpression）, and Ad-NONMMUGO148387（Schwann cells with GFP and NONMMUGO148387 overexpression）. Cell Counting Kit-8 assay was used to evaluate proliferative capability of mouse Schwann cells after NONMMUG014387 overexpression. Polymerase chain reaction and western blot assay were performed to investigate target genes and downstream pathways of NONMMUG014387. Cell proliferation was significantly increased in Schwann cells overexpressing lnc RNA NONMMUG014387 compared with the other two groups. Further, compared with the control group, m RNA and protein levels of Cthrc1, Wnt5 a, ROR2, Rho A, Rac1, JNK, and ROCK were visibly up-regulated in the Ad-NONMMUGO148387 group. Our findings confirm that long non-coding RNA NONMMUG014387 can promote proliferation of Schwann cells surrounding the injury site through targeting Cthrc1 and activating the Wnt/PCP pathway.展开更多
The phenomenon of planar cell polarity is critically required for a myriad of morphogenetic processes in metazoan and is accurately controlled by several conserved modules.Six“core”proteins,including Friz zled,Flami...The phenomenon of planar cell polarity is critically required for a myriad of morphogenetic processes in metazoan and is accurately controlled by several conserved modules.Six“core”proteins,including Friz zled,Flamingo(Celsr),Van Gogh(Vangl),Dishevelled,Prickle,and Diego(Ankrd6),are major components of the Wnt/planar cell polarity pathway.The Fat/Dchs protocadherins and the Scrib polarity complex also function to instruct cellular polarization.In vertebrates,all these pathways are essential for tissue and organ morphogenesis,such as neural tube closure,left-right symmetry breaking,heart and gut morphogenesis,lung and kidney branching,stereociliary bundle orientation,and proximal-distal limb elongation.Mutations in planar polarity genes are closely linked to various congenital diseases.Striking advances have been made in deciphering their contribution to the establishment of spatially oriented pattern in developing or gans and the maintenance of tissue homeostasis.The challenge remains to clarify the complex interplay of different polarity pathways in organogenesis and the link of cell polarity to cell fate specification.Inter disciplinary approaches are also important to understand the roles of mechanical forces in coupling cellular polarization and differentiation.This review outlines current advances on planar polarity regulators in asymmetric organ formation,with the aim to identify questions that deserve further investigation.展开更多
文摘目的:探讨Wnt/PCP信号通路与细胞外基质(extracellular matrix,ECM)共同调控钙调蛋白2(calponin 2,CNN2)在促进肝癌细胞群体性迁移中的作用及其分子机制。方法:结合癌症基因组图谱(The Cancer Genome Atlas,TCGA)与人类蛋白图谱(Human Protein Atlas,HPA)分析CNN2在不同组织中的表达特征,并通过组织芯片评估其在肝癌中的表达水平及预后相关性;采用迁移与划痕实验探讨CNN2对肝癌细胞迁移能力的影响,进一步通过shRNA慢病毒降低Wnt11及CNN2表达,研究Wnt/PCP信号通路对CNN2的调控作用及其分子机制;最后以硬质培养基模拟ECM环境,探讨其与CNN2表达及细胞迁移能力之间的关联。结果:CNN2在肝癌组织中高表达,富集于肿瘤边缘区域,提示其可能在肿瘤细胞迁移早期阶段发挥关键作用。功能实验进一步证实,CNN2显著促进肝癌细胞的群体性迁移,其高表达水平与患者不良预后显著相关。在机制层面,CNN2受Wnt/PCP信号通路调控,且在模拟ECM力学环境下表达显著上调,提示其在肿瘤细胞感知和响应力学信号过程中具有重要功能。结论:Wnt/PCP信号通路调控CNN2的表达与功能,同时CNN2作为力学信号介导因子受ECM力学信号调控,二者协同驱动肝癌细胞的群体性迁移。
基金This work was supported by National Natural Science Foundation of China(grant numbers 81872270 and 81572683 to NT),the Natural Science Foundation Project of Chongqing(cstc2019jcyj-msxmX0587 to KW),the Science and Technology Research Program of Chongqing Municipal Education Commission(Grant number KJQN201900429 to KW),the Major National S&T program(2017ZX10202203-004 to NT),Natural Science Foundation Project of CQ CSTC(cstc2018jcyjAX0254 to NT),and the Leading Talent Program of CQ CSTC(CSTCCXLJRC201719 to NT).
文摘Vesicle Protein Sorting 35(VPS35)is a novel oncogene that promotes tumor growth through the PI3K/AKT signaling in hepatocellular carcinoma(HCC).However,the role of VPS35 in HCC metastasis and the underlying mechanisms remain largely unclear.In this study,we observed that overexpression of VPS35 enhanced hepatoma cell invasion and metastasis by inducing epithelialemesenchymal transition(EMT)-related gene expression.Conversely,knockout of VPS35 significantly inhibited hepatoma cell migration and invasion.Furthermore,depletion of VPS35 decreased the lung metastasis of HCC in nude mice.By transcriptome analysis,we determined that VPS35 promoted HCC metastasis by activating the Wnt/non-canonical planar cell polarity(PCP)pathway.Mechanistically,VPS35 activated the PCP pathway by regulating membrane sorting and trafficking of Frizzled-2(FZD2)and ROR1 in hepatoma cells.Collectively,our results indicate that VPS35 promotes HCC metastasis via enhancing the Wnt/PCP signaling,thus providing a potential prognostic marker and therapeutic target for HCC.
基金supported by a grant from Student’s Platform for Innovation and Entrepreneurship Training Program in China,No.201610062009the National Natural Science Foundation of China(Key Program),No.81330042+1 种基金a grant from the Special Program for Sino-Russian Joint Research Sponsored by the Ministry of Science and Technology,China,No.2014DFR31210a grant from the Key Program Sponsored by the Tianjin Science and Technology Committee of China,No.13RCGFSY19000,14ZCZDSY00044
文摘Schwann cells play a critical role in peripheral nerve regeneration through dedifferentiation and proliferation. In a previous study, we performed microarray analysis of the sciatic nerve after injury. Accordingly, we predicted that long non-coding RNA NONMMUG014387 may promote Schwann cell proliferation after peripheral nerve injury, as bioinformatic analysis revealed that the target gene of NONMMUG014387 was collagen triple helix repeat containing 1（Cthrc1）. Cthrc1 may promote cell proliferation in a variety of cells by activating Wnt/PCP signaling. Nonetheless, bioinformatic analysis still needs to be verified by biological experiment. In this study, the candidate long non-coding RNA, NONMMUG014387, was overexpressed in mouse Schwann cells by recombinant adenovirus transfection. Plasmid p HBAd-MCMV-GFP-NONMMUG014387 and p HBAd-MCMV-GFP were transfected into Schwann cells. Schwann cells were divided into three groups： control（Schwann cells without intervention）, Ad-GFP（Schwann cells with GFP overexpression）, and Ad-NONMMUGO148387（Schwann cells with GFP and NONMMUGO148387 overexpression）. Cell Counting Kit-8 assay was used to evaluate proliferative capability of mouse Schwann cells after NONMMUG014387 overexpression. Polymerase chain reaction and western blot assay were performed to investigate target genes and downstream pathways of NONMMUG014387. Cell proliferation was significantly increased in Schwann cells overexpressing lnc RNA NONMMUG014387 compared with the other two groups. Further, compared with the control group, m RNA and protein levels of Cthrc1, Wnt5 a, ROR2, Rho A, Rac1, JNK, and ROCK were visibly up-regulated in the Ad-NONMMUGO148387 group. Our findings confirm that long non-coding RNA NONMMUG014387 can promote proliferation of Schwann cells surrounding the injury site through targeting Cthrc1 and activating the Wnt/PCP pathway.
基金supported by grants from the National Natural Science Foundation of China(grant number 32070813)the French Muscular Dystrophy Association (AFM-Telethon grant number 23545)+1 种基金the Centre National de la Recherche Scientifiquethe Sorbonne University
文摘The phenomenon of planar cell polarity is critically required for a myriad of morphogenetic processes in metazoan and is accurately controlled by several conserved modules.Six“core”proteins,including Friz zled,Flamingo(Celsr),Van Gogh(Vangl),Dishevelled,Prickle,and Diego(Ankrd6),are major components of the Wnt/planar cell polarity pathway.The Fat/Dchs protocadherins and the Scrib polarity complex also function to instruct cellular polarization.In vertebrates,all these pathways are essential for tissue and organ morphogenesis,such as neural tube closure,left-right symmetry breaking,heart and gut morphogenesis,lung and kidney branching,stereociliary bundle orientation,and proximal-distal limb elongation.Mutations in planar polarity genes are closely linked to various congenital diseases.Striking advances have been made in deciphering their contribution to the establishment of spatially oriented pattern in developing or gans and the maintenance of tissue homeostasis.The challenge remains to clarify the complex interplay of different polarity pathways in organogenesis and the link of cell polarity to cell fate specification.Inter disciplinary approaches are also important to understand the roles of mechanical forces in coupling cellular polarization and differentiation.This review outlines current advances on planar polarity regulators in asymmetric organ formation,with the aim to identify questions that deserve further investigation.
