Numerous studies have demonstrated that the high expression of CXC motif chemokine ligand 16(CXCL16)in cancer correlates with poor prognosis,as well as tumor cell proliferation,migration,and invasion.While CXCL16 can ...Numerous studies have demonstrated that the high expression of CXC motif chemokine ligand 16(CXCL16)in cancer correlates with poor prognosis,as well as tumor cell proliferation,migration,and invasion.While CXCL16 can serve as a tumor biomarker,the underlying mechanism in modulating head and neck squamous cell carcinoma(HNSCC)remains unclear.In this study,the aimed was to investigate the CXCL16 expression in HNSCC and to uncover the potential underlying mechanism.Hereby,we determined the high expression of CXCL16 in The Cancer Genome Atlas(TCGA)database,as well as in tissue samples from patients with HNSCC at our central hospital and from HNSCC cell lines.The results showed that CXCL16 knockdown inhibited the proliferation,migration,and invasion of HNSCC cells.Mechanistically,transcriptome sequencing revealed that CXCL16 may affect HNSCC cell growth by regulating the antioxidant pathway of glutathione peroxidase 1(GPX1).The reactive oxygen species(ROS)levels were elevated in small interfering CXCL16(si-CXCL16)cells,which may contribute to the inhibition of cell proliferation,migration,and invasion.Moreover,treatment of cells with the GPX1 inhibitor eldecalcitol(ED-71)revealed that HNSCC cell growth was significantly inhibited in the synergistic group of si-CXCL16 and GPX1 inhibitor compared to the si-CXCL16 group.In conclusion,CXCL16 contributed to the development of HNSCC cells by modulating the GPX1-mediated antioxidant pathway.Thus,targeting cellular CXCL16 expression seems to be a promising strategy for treating HNSCC.展开更多
Objective To construct and identify the Gpx1-Klk1 vector which contains kidney-specific promoter (Ksp-cadherin). Methods Through PCR amplification, the human Gpx1, Klk1, and Ksp-cadherin cDNA were obtained by taking G...Objective To construct and identify the Gpx1-Klk1 vector which contains kidney-specific promoter (Ksp-cadherin). Methods Through PCR amplification, the human Gpx1, Klk1, and Ksp-cadherin cDNA were obtained by taking Gpx1 cDNA, Klk1 cDNA, and Ksp-cadherin BAC as templates. After being testified, the PCR products were inserted into the expressive vector pIRES-EGFP step-by-step to produce a recombinant vector Ksp-cadherin-Gpx1-Klk1. This vector was examined by restriction enzyme digestion and sequence analysis. Results The recombinant expressive vector Ksp-cadherin-Gpx1-Klk1 was successfully constructed. Conclusion The construction of the recombinant vector Ksp-cadherin-Gpx1-Klk1 laid foundations for investigations in establishing transgenic animal models, the over-expression of Gpx1 and Klk1 in mammal kidney, and gene therapy for ischemia-reperfusion injury during kidney transplantation.展开更多
目的:探讨谷胱甘肽过氧化物酶1(glutathione peroxidase 1,GPX1)在结直肠癌(colorectal cancer,CRC)组织中的表达水平及其对CRC细胞株HT29和LOVO细胞增殖、迁移及侵袭能力的影响。方法:收集2015年6月至2016年3月间海口市人民医院滨江分...目的:探讨谷胱甘肽过氧化物酶1(glutathione peroxidase 1,GPX1)在结直肠癌(colorectal cancer,CRC)组织中的表达水平及其对CRC细胞株HT29和LOVO细胞增殖、迁移及侵袭能力的影响。方法:收集2015年6月至2016年3月间海口市人民医院滨江分院普外科手术切除的60例临床CRC组织及癌旁组织,应用实时荧光定量PCR(q PCR)技术检测CRC组织及癌旁组织中GPX1 m RNA水平。在高表达GPX1 m RNA的HT29细胞株用慢病毒携带sh RNA感染的方法构建敲除GPX1的细胞株,瞬时转染法在低表达GPX1 m RNA的LOVO细胞系构建过表达GPX1的细胞株,并在GPX1 m RNA及蛋白水平进行验证。通过MTS法检测CRC细胞的增殖能力的变化,用划痕实验、Transwell侵袭实验分别检测CRC细胞迁移侵袭能力的变化,同时用Western blotting检测E-钙黏蛋白和波形蛋白表达的变化。结果:CRC组织中GPX1 m RNA表达水平显著低于癌旁组织(0.051±0.024 vs 0.142±0.051,P<0.01)。敲除GPX1后,HT29细胞的增殖能力显著增强(12.901±2.790 vs 6.617±2.462,P<0.01)、侵袭能力显著增强[(384.7±37.9)vs(209.2±31.2)个,P<0.01]、迁移能力显著增强[(0.139±0.025)vs(0.251±0.038)mm,P<0.01]、E-钙黏蛋白表达下调(P<0.01)、波形蛋白表达上调(P<0.05)。过表达GPX1的LOVO细胞的增殖能力显著降低(P<0.01)、迁移和侵袭能力下降(均P<0.05)、E-钙黏蛋白上调(P<0.01)、波形蛋白表达下调(P<0.01)。结论:GPX1 m RNA在人CRC组织中低表达,GPX1负向调控CRC细胞的增殖、迁移和侵袭,其在CRC中可能发挥抑癌作用。展开更多
Human adenovirus(HAdV)can cause severe respiratory infections in immunocompromised patients,but its clinical treatment is seriously limited by side effects of drugs such as poor efficacy,low bioavailability and severe...Human adenovirus(HAdV)can cause severe respiratory infections in immunocompromised patients,but its clinical treatment is seriously limited by side effects of drugs such as poor efficacy,low bioavailability and severe nephrotoxicity.Trace element selenium(Se)has been found will affect the disease progression of pneumonia,but its antivirus efficacy could be improved by speciation optimization.Therefore,herein we performed anti-HAdV effects of different Se speciation and found that lentinan(LNT)-decorated selenium nanoparticles(SeNPs)exhibited low cytotoxicity and excellent anti-HAdV antiviral activity.Furthermore,SeNPs@LNT reduced the HAdV infection-induced mitochondrial damage and excessive production of reactive oxygen species(ROS).It was also involved in the repair of host cell DNA damage and inhibition of viral DNA replication.SeNPs@LNT inhibited HAdV-induced apoptosis mainly by modulating the p53/Bcl-2 apoptosis signaling pathway.In vivo,SeNPs@LNT replenished Se by targeting the infected site through the circulatory system and was involved in the synthesis of Glutathione peroxidase 1(GPx1).More importantly,GPx1 played an antioxidant and immunomodulatory role in alleviating HAdV-induced inflammatory cytokine storm and alleviating adenovirus pneumonia in Se-deficient mice.Collectively,this study provides a Se speciation of SeNPs@LNT with anti-HAdV activity,and demonstrate that SeNPs@LNT is a promising pharmaceutical candidate for the treatment of HAdV.展开更多
基金supported by the Scientific Research Fund of the National Health Commission-Zhejiang Provincial Health Major Science and Technology Plan Project(No.WKJ-ZJ-2415)the Key Research and Development Program of Zhejiang Province(No.2024C03166)+1 种基金the Traditional Chinese Medicine Science and Technology Project of Zhejiang Province(No.2022ZB020)the Zhejiang Provincial Natural Science Foundation of China(No.LY21H160049).
文摘Numerous studies have demonstrated that the high expression of CXC motif chemokine ligand 16(CXCL16)in cancer correlates with poor prognosis,as well as tumor cell proliferation,migration,and invasion.While CXCL16 can serve as a tumor biomarker,the underlying mechanism in modulating head and neck squamous cell carcinoma(HNSCC)remains unclear.In this study,the aimed was to investigate the CXCL16 expression in HNSCC and to uncover the potential underlying mechanism.Hereby,we determined the high expression of CXCL16 in The Cancer Genome Atlas(TCGA)database,as well as in tissue samples from patients with HNSCC at our central hospital and from HNSCC cell lines.The results showed that CXCL16 knockdown inhibited the proliferation,migration,and invasion of HNSCC cells.Mechanistically,transcriptome sequencing revealed that CXCL16 may affect HNSCC cell growth by regulating the antioxidant pathway of glutathione peroxidase 1(GPX1).The reactive oxygen species(ROS)levels were elevated in small interfering CXCL16(si-CXCL16)cells,which may contribute to the inhibition of cell proliferation,migration,and invasion.Moreover,treatment of cells with the GPX1 inhibitor eldecalcitol(ED-71)revealed that HNSCC cell growth was significantly inhibited in the synergistic group of si-CXCL16 and GPX1 inhibitor compared to the si-CXCL16 group.In conclusion,CXCL16 contributed to the development of HNSCC cells by modulating the GPX1-mediated antioxidant pathway.Thus,targeting cellular CXCL16 expression seems to be a promising strategy for treating HNSCC.
基金supported by the National Natural Science Foundation of China (No.30471640)
文摘Objective To construct and identify the Gpx1-Klk1 vector which contains kidney-specific promoter (Ksp-cadherin). Methods Through PCR amplification, the human Gpx1, Klk1, and Ksp-cadherin cDNA were obtained by taking Gpx1 cDNA, Klk1 cDNA, and Ksp-cadherin BAC as templates. After being testified, the PCR products were inserted into the expressive vector pIRES-EGFP step-by-step to produce a recombinant vector Ksp-cadherin-Gpx1-Klk1. This vector was examined by restriction enzyme digestion and sequence analysis. Results The recombinant expressive vector Ksp-cadherin-Gpx1-Klk1 was successfully constructed. Conclusion The construction of the recombinant vector Ksp-cadherin-Gpx1-Klk1 laid foundations for investigations in establishing transgenic animal models, the over-expression of Gpx1 and Klk1 in mammal kidney, and gene therapy for ischemia-reperfusion injury during kidney transplantation.
文摘目的:探讨谷胱甘肽过氧化物酶1(glutathione peroxidase 1,GPX1)在结直肠癌(colorectal cancer,CRC)组织中的表达水平及其对CRC细胞株HT29和LOVO细胞增殖、迁移及侵袭能力的影响。方法:收集2015年6月至2016年3月间海口市人民医院滨江分院普外科手术切除的60例临床CRC组织及癌旁组织,应用实时荧光定量PCR(q PCR)技术检测CRC组织及癌旁组织中GPX1 m RNA水平。在高表达GPX1 m RNA的HT29细胞株用慢病毒携带sh RNA感染的方法构建敲除GPX1的细胞株,瞬时转染法在低表达GPX1 m RNA的LOVO细胞系构建过表达GPX1的细胞株,并在GPX1 m RNA及蛋白水平进行验证。通过MTS法检测CRC细胞的增殖能力的变化,用划痕实验、Transwell侵袭实验分别检测CRC细胞迁移侵袭能力的变化,同时用Western blotting检测E-钙黏蛋白和波形蛋白表达的变化。结果:CRC组织中GPX1 m RNA表达水平显著低于癌旁组织(0.051±0.024 vs 0.142±0.051,P<0.01)。敲除GPX1后,HT29细胞的增殖能力显著增强(12.901±2.790 vs 6.617±2.462,P<0.01)、侵袭能力显著增强[(384.7±37.9)vs(209.2±31.2)个,P<0.01]、迁移能力显著增强[(0.139±0.025)vs(0.251±0.038)mm,P<0.01]、E-钙黏蛋白表达下调(P<0.01)、波形蛋白表达上调(P<0.05)。过表达GPX1的LOVO细胞的增殖能力显著降低(P<0.01)、迁移和侵袭能力下降(均P<0.05)、E-钙黏蛋白上调(P<0.01)、波形蛋白表达下调(P<0.01)。结论:GPX1 m RNA在人CRC组织中低表达,GPX1负向调控CRC细胞的增殖、迁移和侵袭,其在CRC中可能发挥抑癌作用。
基金supported by the fund from the Open Project of Guangdong Key Laboratory of Marine Materia(LMM2020-7)the technology planning projects of Guangzhou(202201020655 and 202102010202)+2 种基金the Guangdong Natural Science Foundation(2020A1515110648)the Open Fund of Guangdong Provincial Key Laboratory of Functional Supramolecular Coordination Materials and Applications(2020A03)the Guangzhou Medical University Students’Science and Technology Innovation Project(2023ekky009 and 02-408-2203-2079).
文摘Human adenovirus(HAdV)can cause severe respiratory infections in immunocompromised patients,but its clinical treatment is seriously limited by side effects of drugs such as poor efficacy,low bioavailability and severe nephrotoxicity.Trace element selenium(Se)has been found will affect the disease progression of pneumonia,but its antivirus efficacy could be improved by speciation optimization.Therefore,herein we performed anti-HAdV effects of different Se speciation and found that lentinan(LNT)-decorated selenium nanoparticles(SeNPs)exhibited low cytotoxicity and excellent anti-HAdV antiviral activity.Furthermore,SeNPs@LNT reduced the HAdV infection-induced mitochondrial damage and excessive production of reactive oxygen species(ROS).It was also involved in the repair of host cell DNA damage and inhibition of viral DNA replication.SeNPs@LNT inhibited HAdV-induced apoptosis mainly by modulating the p53/Bcl-2 apoptosis signaling pathway.In vivo,SeNPs@LNT replenished Se by targeting the infected site through the circulatory system and was involved in the synthesis of Glutathione peroxidase 1(GPx1).More importantly,GPx1 played an antioxidant and immunomodulatory role in alleviating HAdV-induced inflammatory cytokine storm and alleviating adenovirus pneumonia in Se-deficient mice.Collectively,this study provides a Se speciation of SeNPs@LNT with anti-HAdV activity,and demonstrate that SeNPs@LNT is a promising pharmaceutical candidate for the treatment of HAdV.
