TianjinMedJ,September2023,Vol.51No.9抑癌基因SASH1在乳腺癌中结合Vimentin并负性调节Vimentin的表达杨娉娉1,2,张景2,陈红宇1,2,张淼3,周定安2,方文1△摘要:目的寻找参与抑癌基因SASH1调节乳腺癌发生发展的伙伴分子,并分析两者的相关性以及在乳腺癌发生发展中的作用。方法利用液相色谱-串联质谱联用(LC-MS/MS)技术和免疫共沉淀技术分析与SASH1结合并可能调节乳腺癌发生发展的分子。免疫组织化学和蛋白质免疫印迹法(Westernblot)检测30例正常乳腺组织和123例乳腺癌组织SASH1和波形蛋白(Vimentin)的表达水平,并在乳腺癌中分析两者之间的相关性。Westernblot检测乳腺癌细胞中敲低SASH1对Vimentin表达的影响。结果SASH1与Vimentin存在相互作用的可能性为100%。免疫共沉淀证实SASH1与Vimentin可发生蛋白相互作用。免疫组织化学染色结果显示,与正常乳腺组织相比,乳腺癌组织中SASH1表达降低而Vimentin表达增高,且两者呈负相关(P<0.01)。Westernblot实验证实在16例乳腺癌组织和对应的癌旁组织中,乳腺癌组织表现出SASH1低表达,而Vimentin高表达。在乳腺癌细胞中敲低SASH1后Vimentin的表达增高。结论SASH1可能通过负性调节Vimentin的表达参与乳腺癌的发生发展。关键词:乳腺肿瘤;波形蛋白;SASH1;蛋白相互作用中图分类号:R737.9文献标志码:ADOI:10.11958/20222057TumorsuppressorgeneSASH1bindsVimentinandnegativelyregulatestheexpressionofVimentininbreastcancerYANGPingping1,2,ZHANGJing2,CHENHongyu1,2,ZHANGMiao3,ZHOUDingan2,FANGWen1△1SchoolofClinicalLaboratoryScience,GuizhouMedicalUniversity,ClinicalLaboratoryCenter,theAffiliatedHospitalofGuizhouMedicalUniversity,Guiyang550004,China;2ClinicalMedicalResearchCenter,theAffiliatedHospitalofGuizhouMedicalUniversity;3DepartmentofEndocrinology,theAffiliatedHospitalofGuizhouMedicalUniversity△CorrespondingAuthorE-mail:fangwen@gmc.edu.cnAbstract:ObjectiveToinvestigatethepartnermoleculesthatregulatethetumorsuppressorgeneSASH1intheoccurrenceanddevelopmentofbreastcancer,andtoanalyzethecorrelationandroleoftheminbreastcancerdevelopment.MethodsLiquidchromatographytandemmassspectrometry(LC-MS/MS)technology,bioinformaticsandimmunoprecipitationwereusedtoanalyzeandconfirmmoleculesthatmaybindwithSASH1andpotentially...