Immunoglobulin superfamily(IgSF)members account for a large proportion of cell adhesion molecules that perform important immunological functions,including recognizing a variety of counterpart molecules on the cell sur...Immunoglobulin superfamily(IgSF)members account for a large proportion of cell adhesion molecules that perform important immunological functions,including recognizing a variety of counterpart molecules on the cell surface or extracellular matrix.The findings that CD155/poliovirus receptor(PVR)and CD112/nectin-2 are the ligands for CD226/platelet and T-cell activation antigen 1(PTA1)/DNAX accessory molecular-1(DNAM-1),CD96/tactile and Washington University cell adhesion molecule(WUCAM)and that CD226 is physically and functionally associated with lymphocyte function-associated antigen-1(LFA-1)on natural killer(NK)and activated T cells have largely expanded our knowledge about the functions of CD226,CD96,WUCAM and LFA-1 and their respective ligands,CD155,CD112,intercellular adhesion molecule(ICAM)-1 and junctional adhesion molecule(JAM)-1.The interactions of these receptors and their ligands are involved in many key functions of immune cells including naive T cells,cytotoxic T cells,NK cells,NK T cells,monocytes,dendritic cells,mast cells and platelets/megakaryocytes.展开更多
Despite the advance in targeted therapy,lung adenocarcinoma(LUAD)remains one of the leading causes of death in patients with cancer.CD155,a member of poliovirus receptor–related(PRR)family,has been identified as the ...Despite the advance in targeted therapy,lung adenocarcinoma(LUAD)remains one of the leading causes of death in patients with cancer.CD155,a member of poliovirus receptor–related(PRR)family,has been identified as the ligand of the Ig-like receptors tactile(CD96)and DNAM-1(CD226)on T cells.The interaction of CD155 with CD96 transmits an inhibitory signal and suppresses immune response.The interaction of CD155 with CD226 enhances the immune response.1,2,3 CD155 expression has been shown to be elevated in many types of cancers4,5 and is involved with immune suppression in melanoma.6 However,how CD155/CD96 is involved in immune response in the tumor microenvironment of LUAD remains unknown.展开更多
T细胞免疫球蛋白和ITIM结构域蛋白(T-cell immunoreceptor with Ig and ITIM domains,TIGIT)是一种共抑制性受体,在T细胞和NK细胞介导的免疫应答过程中发挥重要作用。在肿瘤免疫监视中,TIGIT的作用与PD-1/PD-L1轴在肿瘤免疫抑制中的作...T细胞免疫球蛋白和ITIM结构域蛋白(T-cell immunoreceptor with Ig and ITIM domains,TIGIT)是一种共抑制性受体,在T细胞和NK细胞介导的免疫应答过程中发挥重要作用。在肿瘤免疫监视中,TIGIT的作用与PD-1/PD-L1轴在肿瘤免疫抑制中的作用类似;其通过与配体CD155结合抑制T细胞和NK细胞抗肿瘤反应,导致肿瘤细胞发生免疫逃逸。有研究发现抗TIGIT单克隆抗体可减轻小鼠肿瘤负荷;抗TIGIT抗体和抗PD-1抗体可发挥协同抗肿瘤作用。因此,TIGIT/CD155有望成为肿瘤免疫治疗的新靶点和更精准的筛选PD-1/PD-L1抑制剂受益人群的生物标志物。该文就TIGIT及其配体CD155的分子结构、生物学功能及其在恶性肿瘤中的表达和免疫调控作用作一综述。展开更多
基金This work was supported by the National Natural Science Foundation of China(Nos.30801003,30972683 and 30901310).
文摘Immunoglobulin superfamily(IgSF)members account for a large proportion of cell adhesion molecules that perform important immunological functions,including recognizing a variety of counterpart molecules on the cell surface or extracellular matrix.The findings that CD155/poliovirus receptor(PVR)and CD112/nectin-2 are the ligands for CD226/platelet and T-cell activation antigen 1(PTA1)/DNAX accessory molecular-1(DNAM-1),CD96/tactile and Washington University cell adhesion molecule(WUCAM)and that CD226 is physically and functionally associated with lymphocyte function-associated antigen-1(LFA-1)on natural killer(NK)and activated T cells have largely expanded our knowledge about the functions of CD226,CD96,WUCAM and LFA-1 and their respective ligands,CD155,CD112,intercellular adhesion molecule(ICAM)-1 and junctional adhesion molecule(JAM)-1.The interactions of these receptors and their ligands are involved in many key functions of immune cells including naive T cells,cytotoxic T cells,NK cells,NK T cells,monocytes,dendritic cells,mast cells and platelets/megakaryocytes.
文摘背景胃肠神经内分泌肿瘤(gastrointestinal neuroendocrine neoplasms,GI-NENs)临床表现多样,部分具有高侵袭性及转移性,预后差.收集我院诊治的GI-NENs患者的临床病理资料,免疫组化检测CD155、T细胞免疫球蛋白和ITIM结构域蛋白(T cell immunoreceptor with Ig and ITIM domains,TIGIT)的表达量,探讨其与临床病理和预后的关系,为患者的治疗提供一个新的方向.目的探讨CD155、TIGIT在GI-NENs中的表达量与临床病理特征的关系.方法收集2016-11/2020-08经我院诊治的168例GI-NENs患者的临床病理资料.免疫组化检测CD155、TIGIT的表达量,探讨其与临床病理和预后的关系.结果CD155和TIGIT在病理分级高的GI-NENs组织中,表达量也较高,差异有统计学意义(P<0.05);CD155表达量与年龄、肿瘤位置、肿瘤最大直径、病理分级、T分期、淋巴结转移、远处转移、TNM分期、Ki-67指数有关(P<0.05);TIGIT表达量与肿瘤最大直径、病理分级、T分期、淋巴结转移、TNM分期、Ki-67指数有关(P<0.05);CD155和TIGIT表达量高的患者预后较表达量低者差,差异有统计学意义(P<0.05).结论CD155和TIGIT表达量在不同分级、分期的GI-NENs患者存在差异,可能参与了GI-NENs的发生及进展的调控过程,高表达可能提示预后不佳.
基金supported by grants from YFC(2017YFC1308800)National Natural Science Foundation of China to Zunfu Ke(30900650,81372501,81572260,81773299,81701834,81502327,81172232,and 31430030)Guangdong Natural Science Foundation(2011B031800025,S2012010008378,S2012010008270,S2013010015327,2013B021800126,20090171120070,9451008901002146,2013B021800126,2014A030313052,2014J4100132,2015A020214010,2016A020215055,201704020094,2013B021800259,2017B070705002,16ykjc08,and 2015ykzd07).
文摘Despite the advance in targeted therapy,lung adenocarcinoma(LUAD)remains one of the leading causes of death in patients with cancer.CD155,a member of poliovirus receptor–related(PRR)family,has been identified as the ligand of the Ig-like receptors tactile(CD96)and DNAM-1(CD226)on T cells.The interaction of CD155 with CD96 transmits an inhibitory signal and suppresses immune response.The interaction of CD155 with CD226 enhances the immune response.1,2,3 CD155 expression has been shown to be elevated in many types of cancers4,5 and is involved with immune suppression in melanoma.6 However,how CD155/CD96 is involved in immune response in the tumor microenvironment of LUAD remains unknown.
文摘T细胞免疫球蛋白和ITIM结构域蛋白(T-cell immunoreceptor with Ig and ITIM domains,TIGIT)是一种共抑制性受体,在T细胞和NK细胞介导的免疫应答过程中发挥重要作用。在肿瘤免疫监视中,TIGIT的作用与PD-1/PD-L1轴在肿瘤免疫抑制中的作用类似;其通过与配体CD155结合抑制T细胞和NK细胞抗肿瘤反应,导致肿瘤细胞发生免疫逃逸。有研究发现抗TIGIT单克隆抗体可减轻小鼠肿瘤负荷;抗TIGIT抗体和抗PD-1抗体可发挥协同抗肿瘤作用。因此,TIGIT/CD155有望成为肿瘤免疫治疗的新靶点和更精准的筛选PD-1/PD-L1抑制剂受益人群的生物标志物。该文就TIGIT及其配体CD155的分子结构、生物学功能及其在恶性肿瘤中的表达和免疫调控作用作一综述。