为分析E3泛素连接酶环指蛋白125(ring finger protein 125,RNF125)在肝癌中的表达及临床预后意义,并探究RNF125对肝癌侵袭和转移的影响及其作用机制,通过ENCORI数据库和临床组织样本分析RNF125在肝癌和癌旁组织中的表达量,使用ENCORI数...为分析E3泛素连接酶环指蛋白125(ring finger protein 125,RNF125)在肝癌中的表达及临床预后意义,并探究RNF125对肝癌侵袭和转移的影响及其作用机制,通过ENCORI数据库和临床组织样本分析RNF125在肝癌和癌旁组织中的表达量,使用ENCORI数据库分析RNF125与肝癌预后的关系。构建敲低和过表达RNF125的肝癌细胞系,通过Transwell试验和细胞划痕试验检验RNF125表达水平对肝癌细胞迁移、侵袭能力的影响。通过动物试验验证调控RNF125对体内肿瘤生长情况及对肿瘤免疫微环境的影响,质谱分析寻找RNF125的靶蛋白,qPCR、蛋白质免疫印迹技术、泛素化试验验证RNF125与MYH9之间的关系,通过蛋白质免疫印迹和细胞免疫荧光技术确定调控RNF125与MYH9对EMT标志蛋白的影响。结果表明:RNF125在肝癌组织中表达较低,RNF125的高表达提示良好的预后。RNF125的表达水平与肝癌细胞迁移和侵袭能力呈负相关。过表达RNF125使肿瘤生长延迟并增加免疫细胞的浸润水平。RNF125特异性结合MYH9并促进其泛素化降解。RNF125与上皮细胞标志物的表达水平呈正相关,与间充质细胞标志物呈负相关。过表达MYH9可逆转RNF125对EMT标志蛋白的影响。综上,RNF125在肝癌中表达下调,RNF125的高表达与肝癌患者的良好预后相关,RNF125通过泛素化MYH9来抑制肝癌的EMT过程,从而抑制肝癌的迁移和侵袭。展开更多
口蹄疫病毒(FMDV)编码四种结构蛋白,其中VP1蛋白是病毒表面的主要衣壳蛋白,在病毒入侵和抗原性方面发挥关键作用,决定病毒的致病力和组织嗜性。2025年1月17日,中国农业科学院兰州兽医研究所郑海学研究员带领的科研团队在PLoS Pathogens...口蹄疫病毒(FMDV)编码四种结构蛋白,其中VP1蛋白是病毒表面的主要衣壳蛋白,在病毒入侵和抗原性方面发挥关键作用,决定病毒的致病力和组织嗜性。2025年1月17日,中国农业科学院兰州兽医研究所郑海学研究员带领的科研团队在PLoS Pathogens期刊上发表了题为“RING finger protein 5 is a key anti-FMDV host factor through inhibition of virion assembly”的研究论文,该研究揭示了环指蛋白5(RNF5)依赖其E3泛素酶活性介导FMDV VP1蛋白降解并限制病毒组装的功能机制,为广谱抗小RNA病毒药物的研发提供了理论依据,为抗病育种提供新思路。展开更多
Ring finger protein 122(RNF122),an E3 ubiquitin ligase,orchestrates antiviral immune responses in mammals by targeting retinoic acid-inducible gene 1 and melanoma differentiation-associated gene 5 for ubiquitination.H...Ring finger protein 122(RNF122),an E3 ubiquitin ligase,orchestrates antiviral immune responses in mammals by targeting retinoic acid-inducible gene 1 and melanoma differentiation-associated gene 5 for ubiquitination.However,its functional relevance in teleosts has yet to be clearly defined,particularly regarding the identification of substrate-specific regulatory sites.This study characterized RNF122 from mandarin fish(Siniperca chuatsi),termed scRNF122,and investigated its regulatory impact on stimulator of interferon genes(STING)-mediated antiviral signaling.Results showed that scRNF122 expression was up-regulated in response to mandarin fish ranavirus(MRV)infection,and its overexpression suppressed scSTING-mediated interferon(IFN)production and enhanced MRV replication.Co-immunoprecipitation confirmed a direct interaction between scRNF122 and scSTING.Functional assays demonstrated that scRNF122 facilitated scSTING degradation through the ubiquitin-proteasome pathway,a process impeded by MG132 treatment.Ubiquitination analyses of various scSTING mutants revealed that scRNF122 catalyzed scSTING ubiquitination at K95,K117,and K155 residues.Moreover,scRNF122 significantly impaired scSTING-dependent antiviral responses by engaging negative regulatory elements within the signaling cascade.Overall,scRNF122 was identified as a negative modulator of STING-mediated IFN signaling in mandarin fish,diminishing STING-dependent antiviral activity and promoting its degradation via the ubiquitin-proteasome pathway at lysine residues K95,K117,and K155.These findings provide mechanistic insight into the post-translational control of STING in teleosts and establish a foundation for future investigations into antiviral immune regulation.展开更多
烟雾病是一种慢性进展性脑血管疾病,其特征为双侧颈内动脉末端及其主要分支的渐进性闭塞以及颅底异常血管网的形成。烟雾病是青年卒中的主要病因之一,但其发病机制尚未明确,可能与遗传、免疫、炎症等多种因素有关。作为烟雾病的主要易...烟雾病是一种慢性进展性脑血管疾病,其特征为双侧颈内动脉末端及其主要分支的渐进性闭塞以及颅底异常血管网的形成。烟雾病是青年卒中的主要病因之一,但其发病机制尚未明确,可能与遗传、免疫、炎症等多种因素有关。作为烟雾病的主要易感基因,环指蛋白213(ring finger protein 213,RNF213)基因在疾病的进展和预后中起着关键作用。尽管目前的RNF213基因编辑动物模型未能完全模拟出烟雾病的典型病理改变,但现有研究揭示了RNF213在血管生成、炎症反应及免疫调节中的重要作用。RNF213基因突变影响内皮细胞和平滑肌细胞的功能,可能与烟雾病中的血管重构密切相关。此外,RNF213还参与包括抗感染反应在内的多种细胞生物学过程,这些过程可能与烟雾病的发病机制关联。综上所述:RNF213基因不仅在烟雾病的发生发展中发挥多重作用,也是未来治疗策略研究的关键靶点。本文旨在综述RNF213基因的多功能性及其在烟雾病发病机制中的作用,以期为深入理解该疾病提供新的视角。展开更多
文摘为分析E3泛素连接酶环指蛋白125(ring finger protein 125,RNF125)在肝癌中的表达及临床预后意义,并探究RNF125对肝癌侵袭和转移的影响及其作用机制,通过ENCORI数据库和临床组织样本分析RNF125在肝癌和癌旁组织中的表达量,使用ENCORI数据库分析RNF125与肝癌预后的关系。构建敲低和过表达RNF125的肝癌细胞系,通过Transwell试验和细胞划痕试验检验RNF125表达水平对肝癌细胞迁移、侵袭能力的影响。通过动物试验验证调控RNF125对体内肿瘤生长情况及对肿瘤免疫微环境的影响,质谱分析寻找RNF125的靶蛋白,qPCR、蛋白质免疫印迹技术、泛素化试验验证RNF125与MYH9之间的关系,通过蛋白质免疫印迹和细胞免疫荧光技术确定调控RNF125与MYH9对EMT标志蛋白的影响。结果表明:RNF125在肝癌组织中表达较低,RNF125的高表达提示良好的预后。RNF125的表达水平与肝癌细胞迁移和侵袭能力呈负相关。过表达RNF125使肿瘤生长延迟并增加免疫细胞的浸润水平。RNF125特异性结合MYH9并促进其泛素化降解。RNF125与上皮细胞标志物的表达水平呈正相关,与间充质细胞标志物呈负相关。过表达MYH9可逆转RNF125对EMT标志蛋白的影响。综上,RNF125在肝癌中表达下调,RNF125的高表达与肝癌患者的良好预后相关,RNF125通过泛素化MYH9来抑制肝癌的EMT过程,从而抑制肝癌的迁移和侵袭。
文摘口蹄疫病毒(FMDV)编码四种结构蛋白,其中VP1蛋白是病毒表面的主要衣壳蛋白,在病毒入侵和抗原性方面发挥关键作用,决定病毒的致病力和组织嗜性。2025年1月17日,中国农业科学院兰州兽医研究所郑海学研究员带领的科研团队在PLoS Pathogens期刊上发表了题为“RING finger protein 5 is a key anti-FMDV host factor through inhibition of virion assembly”的研究论文,该研究揭示了环指蛋白5(RNF5)依赖其E3泛素酶活性介导FMDV VP1蛋白降解并限制病毒组装的功能机制,为广谱抗小RNA病毒药物的研发提供了理论依据,为抗病育种提供新思路。
基金supported by the National Key Research and Development Program of China(2022YFE0203900,2024YFD2401101)China Agriculture Research System(CARS-46)+1 种基金National Natural Science Foundation of China(32473201)Guangdong S&T Program(2022B1111030001,2024B1212040007)。
文摘Ring finger protein 122(RNF122),an E3 ubiquitin ligase,orchestrates antiviral immune responses in mammals by targeting retinoic acid-inducible gene 1 and melanoma differentiation-associated gene 5 for ubiquitination.However,its functional relevance in teleosts has yet to be clearly defined,particularly regarding the identification of substrate-specific regulatory sites.This study characterized RNF122 from mandarin fish(Siniperca chuatsi),termed scRNF122,and investigated its regulatory impact on stimulator of interferon genes(STING)-mediated antiviral signaling.Results showed that scRNF122 expression was up-regulated in response to mandarin fish ranavirus(MRV)infection,and its overexpression suppressed scSTING-mediated interferon(IFN)production and enhanced MRV replication.Co-immunoprecipitation confirmed a direct interaction between scRNF122 and scSTING.Functional assays demonstrated that scRNF122 facilitated scSTING degradation through the ubiquitin-proteasome pathway,a process impeded by MG132 treatment.Ubiquitination analyses of various scSTING mutants revealed that scRNF122 catalyzed scSTING ubiquitination at K95,K117,and K155 residues.Moreover,scRNF122 significantly impaired scSTING-dependent antiviral responses by engaging negative regulatory elements within the signaling cascade.Overall,scRNF122 was identified as a negative modulator of STING-mediated IFN signaling in mandarin fish,diminishing STING-dependent antiviral activity and promoting its degradation via the ubiquitin-proteasome pathway at lysine residues K95,K117,and K155.These findings provide mechanistic insight into the post-translational control of STING in teleosts and establish a foundation for future investigations into antiviral immune regulation.
文摘烟雾病是一种慢性进展性脑血管疾病,其特征为双侧颈内动脉末端及其主要分支的渐进性闭塞以及颅底异常血管网的形成。烟雾病是青年卒中的主要病因之一,但其发病机制尚未明确,可能与遗传、免疫、炎症等多种因素有关。作为烟雾病的主要易感基因,环指蛋白213(ring finger protein 213,RNF213)基因在疾病的进展和预后中起着关键作用。尽管目前的RNF213基因编辑动物模型未能完全模拟出烟雾病的典型病理改变,但现有研究揭示了RNF213在血管生成、炎症反应及免疫调节中的重要作用。RNF213基因突变影响内皮细胞和平滑肌细胞的功能,可能与烟雾病中的血管重构密切相关。此外,RNF213还参与包括抗感染反应在内的多种细胞生物学过程,这些过程可能与烟雾病的发病机制关联。综上所述:RNF213基因不仅在烟雾病的发生发展中发挥多重作用,也是未来治疗策略研究的关键靶点。本文旨在综述RNF213基因的多功能性及其在烟雾病发病机制中的作用,以期为深入理解该疾病提供新的视角。
