高校新工科教育背景下对研究生创新创业教育提出更高要求,创新创业课程教学是提升研究生双创能力有效途径之一。而现有创新创业课程还存在内容设置与产业创新创业链不匹配,只关注创业链中的单个或部分环节,未全面覆盖;创新创业课程内容...高校新工科教育背景下对研究生创新创业教育提出更高要求,创新创业课程教学是提升研究生双创能力有效途径之一。而现有创新创业课程还存在内容设置与产业创新创业链不匹配,只关注创业链中的单个或部分环节,未全面覆盖;创新创业课程内容设置与行业特色匹配度不高,专业和行业特色缺乏等问题。本文以移动物联网(Mobile Internet of Things,MIoT)产业为例,探索和创新M2M(Market to Market)端到端全链创新创业课程内容建设模式,实现移动物联网产业调研与选择、产业链与市场分析、产业关键技术、产品研发与管理和产品营销与运营5部分课程内容设计,构建M2M端到端创新创业商业逻辑全链闭环。教学实践表明,创新创业课程内容设计能有效提升研究生、工程实践和学科竞赛培养质量,具有一定的推广和示范意义。展开更多
目的:探讨M2型肿瘤相关巨噬细胞(M2 type tumor-associated macrophage,M2-TAMs)介导白细胞介素6(interleukin-6,IL-6)-Janus激酶2(Janus kinase 2,JAK2)/信号转导及转录激活因子3(signal transducer and activator of transcription 3,...目的:探讨M2型肿瘤相关巨噬细胞(M2 type tumor-associated macrophage,M2-TAMs)介导白细胞介素6(interleukin-6,IL-6)-Janus激酶2(Janus kinase 2,JAK2)/信号转导及转录激活因子3(signal transducer and activator of transcription 3,STAT3)轴促进胃癌干性和侵袭迁移的作用机制。方法:应用TCGA数据库分析胃癌及癌旁正常组织M2-TAMs的分布与干性指标的关系,并在胃癌患者组织水平进行验证。体外通过成球实验检测胃癌细胞的干性潜能并构建M2-TAMs体外共培养体系,运用qRT-PCR和Western blot技术检测肿瘤干性标志物CD44和醛脱氢酶1(aldehyde dehydrogenase 1,ALDH1)的变化,通过Transwell实验探究胃癌迁移、侵袭能力的变化。利用转录组测序筛选差异基因,通过KEGG富集分析探寻关键通路,并采用中和抗体及通路抑制剂进行相关性验证。结果:TCGA数据库分析和体内组织验证结果均表明胃癌组织中M2-TAMs的密度显著高于癌旁正常组织,且其数量的增加与肿瘤干性标志(CD44和ALDH1)呈正相关。与M2-TAMs共培养的胃癌细胞在CD44和ALDH1的mRNA及蛋白表达水平较对照组显著升高,同时共培养组肿瘤细胞成球率和侵袭迁移能力均显著增强,JAK2/STAT3信号通路关键蛋白表达水平显著升高。KEGG通路分析发现STAT3是肿瘤干性调控的关键基因。与极化前的巨噬细胞相比,极化的M2-TAMs有22个上调分泌因子,其中IL-6显著升高,且与患者不良预后相关。加入stattic(选择性STAT3信号通路抑制剂)和(或)IL-6中和抗体均能抑制胃癌细胞的干性、迁移和侵袭。以上结果P值均<0.05。结论:M2-TAMs通过分泌IL-6介导JAK2/STAT3信号通路激活胃癌细胞干性潜能,进而促进胃癌的侵袭和迁移。展开更多
Objectives:This study aimed to determine the role and mechanism underlying migration and invasion inhibitory protein(MIIP)modulation in M2 macrophages within the tumor microenvironment and the potential of targeting t...Objectives:This study aimed to determine the role and mechanism underlying migration and invasion inhibitory protein(MIIP)modulation in M2 macrophages within the tumor microenvironment and the potential of targeting the MIIP-stimulator of interferon genes(STING)pathway in colorectal cancer(CRC)therapy.Methods:MIIP expression was analyzed for associations with the STING pathway and M2 macrophage infiltration using public datasets and clinical CRC samples.CRC cells were genetically modified using lentiviral vectors to overexpress or silence MIIP and STING.The interactions of genetically modified CRC cells with macrophages were studied in co-culture systems.Techniques,including immunofluorescence staining,RT‒qPCR,western blot,ELISA,flow cytometry,and Transwell migration and invasion assays,were used to evaluate the crosstalk between CRC cells and macrophages.An orthotopic mouse CRC model was developed to study the effects of MIIP on M2 macrophage polarization and tumor metastasis through the STING-NFκB2-IL10 axis.The therapeutic significance of a STING antagonist was also assessed in vivo.Results:Analyses of The Cancer Genome Atlas(TCGA)cohort and our CRC cohort revealed low MIIP expression is associated with STING pathway activation,increased M2 macrophage infiltration,and poor clinical outcomes.The results of functional experiments demonstrated that MIIP inhibits IL10 production via the STING-TRAF3-NFκB2 axis in CRC cells,suppressing M2 macrophage polarization in co-culture systems.Conversely,M2 macrophages promoted CRC cell migration and invasion in an IL10-dependent manner.In vitro and in vivo studies confirmed that the MIIP-mediated feedback loop between CRC cells and macrophages depends on the STING-NFκB2-IL10 axis.Furthermore,inhibition of STING expression in a mouse model reduced M2 macrophage polarization and tumor metastasis.Conclusions:This study established MIIP as a crucial regulator of macrophage polarization in the CRC tumor microenvironment,providing new insights into the role in suppressing CRC progression and immune-tumor crosstalk.These findings highlight the potential of targeting the STING pathway as a therapeutic strategy for CRC patients who respond poorly to immune checkpoint inhibitors.展开更多
Background:Hepatocellular carcinoma(HCC)is an aggressive and lethal malignancy.Metabolic reprogramming dynamically remodels the tumor microenvironment(TME)and drives HCC progression.This study investigated the mechani...Background:Hepatocellular carcinoma(HCC)is an aggressive and lethal malignancy.Metabolic reprogramming dynamically remodels the tumor microenvironment(TME)and drives HCC progression.This study investigated the mechanism through which metabolic reprogramming remodels the TME in HCC.Methods:HCC patient transcriptome data were subjected to bioinformatics analysis to identify differentially expressed genes and immune infiltration status.Immunohistochemical analysis was performed to determine the correlation between succinate dehydrogenase complex subunit A(SDHA)expression and M2 macrophage infiltration.SDHA-knockdown or SDHA-overexpressing HCC cells were used for in vitro experiments,including co-culturing,flow cytometry,and enzyme-linked immunosorbent assay.Western blotting assay,functional assays,and subcutaneous tumor model mice were used to elucidate the molecular mechanisms underlying succinate-mediated HCC cell-macrophage interactions in the TME.Results:Higher infiltration of M2 macrophages correlated with worse prognosis in HCC patients.SDHA was downregulated in HCC tumor tissues and showed a negative correlation with M2 macrophage infiltration.SDHA knockdown promoted M2 macrophage polarization,whereas SDHA overexpression reversed this effect.Mechanistically,SDHA deficiency in HCC cells induced succinate accumulation,which promoted M2 macrophage polarization by activating the G protein-coupled receptor 91(GPR91)/signal transducer and activator of transcription 3(STAT3)pathway.Concurrently,succinate stimulation enhanced mitochondrial oxidative phosphorylation in M2 macrophages,thereby promoting HCC progression.Serum succinate levels were elevated in HCC patients.The receiver operating characteristic curve analysis indicated that serum succinate is a promising diagnostic marker for HCC(area under the curve=0.815).Conclusion:SDHA deficiency leads to succinate accumulation,which promotes M2 macrophage polarization through the GPR91/STAT3 pathway,thereby facilitating HCC progression.Based on these findings,serum succinate could be a promising diagnostic biomarker for HCC.展开更多
文摘高校新工科教育背景下对研究生创新创业教育提出更高要求,创新创业课程教学是提升研究生双创能力有效途径之一。而现有创新创业课程还存在内容设置与产业创新创业链不匹配,只关注创业链中的单个或部分环节,未全面覆盖;创新创业课程内容设置与行业特色匹配度不高,专业和行业特色缺乏等问题。本文以移动物联网(Mobile Internet of Things,MIoT)产业为例,探索和创新M2M(Market to Market)端到端全链创新创业课程内容建设模式,实现移动物联网产业调研与选择、产业链与市场分析、产业关键技术、产品研发与管理和产品营销与运营5部分课程内容设计,构建M2M端到端创新创业商业逻辑全链闭环。教学实践表明,创新创业课程内容设计能有效提升研究生、工程实践和学科竞赛培养质量,具有一定的推广和示范意义。
文摘目的:探讨M2型肿瘤相关巨噬细胞(M2 type tumor-associated macrophage,M2-TAMs)介导白细胞介素6(interleukin-6,IL-6)-Janus激酶2(Janus kinase 2,JAK2)/信号转导及转录激活因子3(signal transducer and activator of transcription 3,STAT3)轴促进胃癌干性和侵袭迁移的作用机制。方法:应用TCGA数据库分析胃癌及癌旁正常组织M2-TAMs的分布与干性指标的关系,并在胃癌患者组织水平进行验证。体外通过成球实验检测胃癌细胞的干性潜能并构建M2-TAMs体外共培养体系,运用qRT-PCR和Western blot技术检测肿瘤干性标志物CD44和醛脱氢酶1(aldehyde dehydrogenase 1,ALDH1)的变化,通过Transwell实验探究胃癌迁移、侵袭能力的变化。利用转录组测序筛选差异基因,通过KEGG富集分析探寻关键通路,并采用中和抗体及通路抑制剂进行相关性验证。结果:TCGA数据库分析和体内组织验证结果均表明胃癌组织中M2-TAMs的密度显著高于癌旁正常组织,且其数量的增加与肿瘤干性标志(CD44和ALDH1)呈正相关。与M2-TAMs共培养的胃癌细胞在CD44和ALDH1的mRNA及蛋白表达水平较对照组显著升高,同时共培养组肿瘤细胞成球率和侵袭迁移能力均显著增强,JAK2/STAT3信号通路关键蛋白表达水平显著升高。KEGG通路分析发现STAT3是肿瘤干性调控的关键基因。与极化前的巨噬细胞相比,极化的M2-TAMs有22个上调分泌因子,其中IL-6显著升高,且与患者不良预后相关。加入stattic(选择性STAT3信号通路抑制剂)和(或)IL-6中和抗体均能抑制胃癌细胞的干性、迁移和侵袭。以上结果P值均<0.05。结论:M2-TAMs通过分泌IL-6介导JAK2/STAT3信号通路激活胃癌细胞干性潜能,进而促进胃癌的侵袭和迁移。
文摘Objectives:This study aimed to determine the role and mechanism underlying migration and invasion inhibitory protein(MIIP)modulation in M2 macrophages within the tumor microenvironment and the potential of targeting the MIIP-stimulator of interferon genes(STING)pathway in colorectal cancer(CRC)therapy.Methods:MIIP expression was analyzed for associations with the STING pathway and M2 macrophage infiltration using public datasets and clinical CRC samples.CRC cells were genetically modified using lentiviral vectors to overexpress or silence MIIP and STING.The interactions of genetically modified CRC cells with macrophages were studied in co-culture systems.Techniques,including immunofluorescence staining,RT‒qPCR,western blot,ELISA,flow cytometry,and Transwell migration and invasion assays,were used to evaluate the crosstalk between CRC cells and macrophages.An orthotopic mouse CRC model was developed to study the effects of MIIP on M2 macrophage polarization and tumor metastasis through the STING-NFκB2-IL10 axis.The therapeutic significance of a STING antagonist was also assessed in vivo.Results:Analyses of The Cancer Genome Atlas(TCGA)cohort and our CRC cohort revealed low MIIP expression is associated with STING pathway activation,increased M2 macrophage infiltration,and poor clinical outcomes.The results of functional experiments demonstrated that MIIP inhibits IL10 production via the STING-TRAF3-NFκB2 axis in CRC cells,suppressing M2 macrophage polarization in co-culture systems.Conversely,M2 macrophages promoted CRC cell migration and invasion in an IL10-dependent manner.In vitro and in vivo studies confirmed that the MIIP-mediated feedback loop between CRC cells and macrophages depends on the STING-NFκB2-IL10 axis.Furthermore,inhibition of STING expression in a mouse model reduced M2 macrophage polarization and tumor metastasis.Conclusions:This study established MIIP as a crucial regulator of macrophage polarization in the CRC tumor microenvironment,providing new insights into the role in suppressing CRC progression and immune-tumor crosstalk.These findings highlight the potential of targeting the STING pathway as a therapeutic strategy for CRC patients who respond poorly to immune checkpoint inhibitors.
基金supported by the Central Government-Guided Local Science and Technology Development Fund Project(Science and Technology Innovation Base Project)(Grant No.236Z7749G)Hebei Provincial Precision Medicine Innovation and Development Joint Fund Incubation Project(Grant No.H2025206547)Hebei Provincial Basic Research Special Youth Science Fund Project(Grant No.H2025206274).
文摘Background:Hepatocellular carcinoma(HCC)is an aggressive and lethal malignancy.Metabolic reprogramming dynamically remodels the tumor microenvironment(TME)and drives HCC progression.This study investigated the mechanism through which metabolic reprogramming remodels the TME in HCC.Methods:HCC patient transcriptome data were subjected to bioinformatics analysis to identify differentially expressed genes and immune infiltration status.Immunohistochemical analysis was performed to determine the correlation between succinate dehydrogenase complex subunit A(SDHA)expression and M2 macrophage infiltration.SDHA-knockdown or SDHA-overexpressing HCC cells were used for in vitro experiments,including co-culturing,flow cytometry,and enzyme-linked immunosorbent assay.Western blotting assay,functional assays,and subcutaneous tumor model mice were used to elucidate the molecular mechanisms underlying succinate-mediated HCC cell-macrophage interactions in the TME.Results:Higher infiltration of M2 macrophages correlated with worse prognosis in HCC patients.SDHA was downregulated in HCC tumor tissues and showed a negative correlation with M2 macrophage infiltration.SDHA knockdown promoted M2 macrophage polarization,whereas SDHA overexpression reversed this effect.Mechanistically,SDHA deficiency in HCC cells induced succinate accumulation,which promoted M2 macrophage polarization by activating the G protein-coupled receptor 91(GPR91)/signal transducer and activator of transcription 3(STAT3)pathway.Concurrently,succinate stimulation enhanced mitochondrial oxidative phosphorylation in M2 macrophages,thereby promoting HCC progression.Serum succinate levels were elevated in HCC patients.The receiver operating characteristic curve analysis indicated that serum succinate is a promising diagnostic marker for HCC(area under the curve=0.815).Conclusion:SDHA deficiency leads to succinate accumulation,which promotes M2 macrophage polarization through the GPR91/STAT3 pathway,thereby facilitating HCC progression.Based on these findings,serum succinate could be a promising diagnostic biomarker for HCC.
