Objective： Previous studies have investigated the role of cytotoxic T-lymphocyte antigen-4 （CTLA-4） and tumor necrosis factor-alpha （TNF-a） in carcinogenesis of osteosarcoma, but their results were inconsistent. ...Objective： Previous studies have investigated the role of cytotoxic T-lymphocyte antigen-4 （CTLA-4） and tumor necrosis factor-alpha （TNF-a） in carcinogenesis of osteosarcoma, but their results were inconsistent. We aimed to clarify the associations between CTLA-4, TNF-a polymorphism and osteosarcoma risk by using meta-analysis. Methods： We searched relevant studies without language restriction in PubMed, EMbase, Cochrane Library, Google Scholar databases, Chinese National Knowledge Infrastructure （CNKI） and conference literature in humans published prior to March 2013. The strengths of the associations between genetic variants and osteosarcoma risk were estimated by odds ratio （OR） with 95% confidence interval （95% CI）. Results： A total of seven studies with 1,198 osteosarcoma patients and 1,493 controls were selected. Four studies were eligible for CTLA-4 （1,003 osteosarcoma and 1,162 controls）, and three studies for TNF-a （195 osteosarcoma and 331 controls）. Pooled results showed that rs231775 polymorphism of CTLA-4 was associated with osteosarcoma risk （GG vs. AA： OR=1.63, 95% CI=1.24-2.13; GG ＋ GA vs. AA： OR=1.56, 95% CI=1.21-2.01; AA ＋ GA vs. GG： OR=0.83, 95% CI=0.71-0.97; G vs. A： OR=1.21, 95% CI=1.08-1.36）. No significant heterogeneity was observed across the studies. No significant associations were found between rs5742909 polymorphism of CTLA-4 or rs1800629 polymorphism of TNF-a and osteosarcoma risk. Conclusions： These results suggest that the rs231775 polymorphism of CTLA-4 may play an important role in carcinogenesis of osteosarcoma.展开更多
细胞毒性T淋巴细胞相关抗原4(cytotoxic T lymphocyte associated antigen-4,CTLA-4)是一种跨膜蛋白质,能够抑制T细胞的增殖与活化,降低机体抗肿瘤免疫反应。CTLA-4与多种肿瘤的形成相关,其与肺癌的内在联系也备受关注。同时在肺癌的免...细胞毒性T淋巴细胞相关抗原4(cytotoxic T lymphocyte associated antigen-4,CTLA-4)是一种跨膜蛋白质,能够抑制T细胞的增殖与活化,降低机体抗肿瘤免疫反应。CTLA-4与多种肿瘤的形成相关,其与肺癌的内在联系也备受关注。同时在肺癌的免疫治疗中CTLA-4也扮演着重要的角色。本文就近年来CTLA-4与肺癌的研究进展进行综述。展开更多
EMulate Therapeutics has developed a system for emulating the effects of solvated molecules via their magnetic field recordings. Recordings of magnetic field emissions of select small inhibitor RNAs (siRNAs;murine tar...EMulate Therapeutics has developed a system for emulating the effects of solvated molecules via their magnetic field recordings. Recordings of magnetic field emissions of select small inhibitor RNAs (siRNAs;murine targeting CTLA-4 and murine targeting PD-1) were tested on C57Bl/6 mice implanted subcutaneously with the GL261 murine tumor cell line. A signal composed of concatenated recordings of siRNA molecules targeting the murine CTLA-4 and PD-1 receptors (labeled A2) was used in immune competent C57Bl/6 mice. The mice were flank implanted with the murine glioblastoma cell line GL261. Mice were exposed to the signal continuously (24 hours a day) until tumor volumes reached the designated volume limit. Tumors were excised and analyzed via PAGE/Western blot for the expression of CTLA-4, PD-1, Ki67, Caspase 3, CD4 and CD8. Terminal blood draws were used for CBCs. We report the down regulation of the checkpoint inhibitors CTLA-4 in the exposed mice. Significant tumor volume reduction was observed in mice exposed to the siRNA signal compared to control mice;no adverse events were recorded. Cell blood counts (CBC) and protein expression patterns were observed to correlate with the expected function of protein expression inhibition of the targets.展开更多
目的系统评价中国人群弥漫性毒性甲状腺肿（Graves′disease,GD）与细胞毒性T淋巴细胞相关抗原4（CTLA-4）基因外显子1＋49位点A/G（A49G）和3′非翻译区A/G（CT60）多态性的相关性。方法通过中国学术期刊全文数据库（CNKI）、PubMed数...目的系统评价中国人群弥漫性毒性甲状腺肿（Graves′disease,GD）与细胞毒性T淋巴细胞相关抗原4（CTLA-4）基因外显子1＋49位点A/G（A49G）和3′非翻译区A/G（CT60）多态性的相关性。方法通过中国学术期刊全文数据库（CNKI）、PubMed数据库、万方数据库、中国生物医学文献数据库（CBM）,收集国内外关于中国人群细胞毒性T淋巴细胞相关抗原-4（CTLA-4）基因A49G和CT60位点多态性与GD病相关性的病例对照研究,通过严格筛选文献,评价文献质量,提取所需文献原始数据,用RevMan5.3软件和Stata12.0软件进行Meta分析和Egger′s线性回归检验,分别统计描述基因频率模型（G vs A）、共显性模型（GG vs AA）、显性模型（GG＋AG vs AA）、隐性模型（GG vs AG＋AA）的合并OR值及95%CI。结果入选文献25篇,中文16篇,英文9篇。CTLA-4基因A49G多态性的基因频率模型、共显性模型、显性模型、隐性模型合并OR值（95%CI）分别是1.94（1.67-2.25）、3.93（2.84-5.45）、2.69（2.07-3.50）、2.09（1.73-2.53）;CTLA-4基因CT60位点多态性的基因频率模型、共显性模型、显性模型、隐性模型合并OR值（95%CI）分别是1.38（1.26-1.51）、1.61（1.28-2.03）、1.58（1.26-1.97）、1.40（1.26-1.56）。结论 GD病与CTLA-4基因A49G和CT60位点多态性有关,且为正相关,即两位点多态性是GD病发病的危险因素。展开更多
文摘淋巴细胞活化基因3(lymphocyte-activation gene 3,LAG-3)又称CD223,是一种由LAG-3基因编码的含有498个氨基酸的I型穿膜蛋白,由胞外区、穿膜区和胞内区三部分组成。LAG-3主要通过胞外区与配体结合,负向调控T淋巴细胞,避免T细胞过度激活引发自身免疫。与程序性死亡蛋白-1(programmed cell death 1,PD-1)和细胞毒性T淋巴细胞抗原4(cytotoxic T lymphocyte antigen 4,CTLA-4)一样,LAG-3是体内重要的免疫检查点,对人体免疫系统起到平衡调控作用。肿瘤细胞通过高表达LAG-3配体逃避机体免疫系统的监视。随着免疫检查点的研究逐渐深入,LAG-3成为继PD-1和CTLA-4之后新一代的免疫治疗靶点。本文主要对LAG-3的结构、功能及其抑制剂在肿瘤免疫治疗中的应用进行综述,以期为LAG-3的进一步研究提供参考。
基金supported by National Natural Science Foundation(No.81260315)Foundation of the Education Department of Guangxi Province,China(No.201010LX375)the Foundation of the Nature Science Fund,Guangxi Province,China(No.2012GXNSFBA053121)
文摘Objective： Previous studies have investigated the role of cytotoxic T-lymphocyte antigen-4 （CTLA-4） and tumor necrosis factor-alpha （TNF-a） in carcinogenesis of osteosarcoma, but their results were inconsistent. We aimed to clarify the associations between CTLA-4, TNF-a polymorphism and osteosarcoma risk by using meta-analysis. Methods： We searched relevant studies without language restriction in PubMed, EMbase, Cochrane Library, Google Scholar databases, Chinese National Knowledge Infrastructure （CNKI） and conference literature in humans published prior to March 2013. The strengths of the associations between genetic variants and osteosarcoma risk were estimated by odds ratio （OR） with 95% confidence interval （95% CI）. Results： A total of seven studies with 1,198 osteosarcoma patients and 1,493 controls were selected. Four studies were eligible for CTLA-4 （1,003 osteosarcoma and 1,162 controls）, and three studies for TNF-a （195 osteosarcoma and 331 controls）. Pooled results showed that rs231775 polymorphism of CTLA-4 was associated with osteosarcoma risk （GG vs. AA： OR=1.63, 95% CI=1.24-2.13; GG ＋ GA vs. AA： OR=1.56, 95% CI=1.21-2.01; AA ＋ GA vs. GG： OR=0.83, 95% CI=0.71-0.97; G vs. A： OR=1.21, 95% CI=1.08-1.36）. No significant heterogeneity was observed across the studies. No significant associations were found between rs5742909 polymorphism of CTLA-4 or rs1800629 polymorphism of TNF-a and osteosarcoma risk. Conclusions： These results suggest that the rs231775 polymorphism of CTLA-4 may play an important role in carcinogenesis of osteosarcoma.
文摘细胞毒性T淋巴细胞相关抗原4(cytotoxic T lymphocyte associated antigen-4,CTLA-4)是一种跨膜蛋白质,能够抑制T细胞的增殖与活化,降低机体抗肿瘤免疫反应。CTLA-4与多种肿瘤的形成相关,其与肺癌的内在联系也备受关注。同时在肺癌的免疫治疗中CTLA-4也扮演着重要的角色。本文就近年来CTLA-4与肺癌的研究进展进行综述。
文摘EMulate Therapeutics has developed a system for emulating the effects of solvated molecules via their magnetic field recordings. Recordings of magnetic field emissions of select small inhibitor RNAs (siRNAs;murine targeting CTLA-4 and murine targeting PD-1) were tested on C57Bl/6 mice implanted subcutaneously with the GL261 murine tumor cell line. A signal composed of concatenated recordings of siRNA molecules targeting the murine CTLA-4 and PD-1 receptors (labeled A2) was used in immune competent C57Bl/6 mice. The mice were flank implanted with the murine glioblastoma cell line GL261. Mice were exposed to the signal continuously (24 hours a day) until tumor volumes reached the designated volume limit. Tumors were excised and analyzed via PAGE/Western blot for the expression of CTLA-4, PD-1, Ki67, Caspase 3, CD4 and CD8. Terminal blood draws were used for CBCs. We report the down regulation of the checkpoint inhibitors CTLA-4 in the exposed mice. Significant tumor volume reduction was observed in mice exposed to the siRNA signal compared to control mice;no adverse events were recorded. Cell blood counts (CBC) and protein expression patterns were observed to correlate with the expected function of protein expression inhibition of the targets.
文摘目的探索免疫治疗在恶性胸膜间皮瘤(malignant pleural mesothelioma,MPM)中免疫疗效相关关键分子及其可能的机制。方法2018年7月至2020年7月,纳入GEO数据库中GSE117358的表达谱进行分析;首先,根据是否对免疫治疗是否有效分为两组:免疫治疗反应组和免疫治疗无反应组,同时分析两组之间差异有统计学意义基因;其次,分析两组差异有统计学意义基因在基因本体(gene ontology,GO)生物学行为及京都基因与基因组百科全书(Kyoto encyclopedia of genes and ge‐nomes,KEGG)富集信号通路等方面的差异;最后,对差异有统计学意义基因构建蛋白-蛋白互作网络,筛选在生物学行为中的重要模块及关键基因,并对关键基因在TCGA数据库中进行整合分析验证。结果在免疫治疗反应组(12个样本)及免疫治疗无反应组(12个样本)中共筛选出1025个差异基因,相对于免疫治疗无反应组,在免疫治疗反应组中有782个上调和243个下调基因。GO和KEGG分析显示,这些差异基因的功能主要集中在细胞因子受体通路、细胞黏附通路、T细胞受体通路及NFkappa B信号通路等;在蛋白-蛋白互作网络分析中,筛选出节点度最高的10个核心基因包括Tnf,Il6,Ptprc,Csf2,Cd86,Cxcl9,Sell,Cxcr3,Ccl2,Cd40。TCGA数据库整合分析显示,Tnf,Il6,Cd86,Cxcl9,Sell,Cxcr3,Cd40等疗效相关关键基因在肉瘤样胸膜间皮瘤中呈现相对高表达,且差异有统计学意义。结论核心基因Tnf,Il6,Ptprc,Csf2,Cd86,Cxcl9,Sell,Cxcr3,Ccl2,Cd40有望成为预测MPM的分子标志物及治疗的潜在靶点。
文摘目的系统评价中国人群弥漫性毒性甲状腺肿（Graves′disease,GD）与细胞毒性T淋巴细胞相关抗原4（CTLA-4）基因外显子1＋49位点A/G（A49G）和3′非翻译区A/G（CT60）多态性的相关性。方法通过中国学术期刊全文数据库（CNKI）、PubMed数据库、万方数据库、中国生物医学文献数据库（CBM）,收集国内外关于中国人群细胞毒性T淋巴细胞相关抗原-4（CTLA-4）基因A49G和CT60位点多态性与GD病相关性的病例对照研究,通过严格筛选文献,评价文献质量,提取所需文献原始数据,用RevMan5.3软件和Stata12.0软件进行Meta分析和Egger′s线性回归检验,分别统计描述基因频率模型（G vs A）、共显性模型（GG vs AA）、显性模型（GG＋AG vs AA）、隐性模型（GG vs AG＋AA）的合并OR值及95%CI。结果入选文献25篇,中文16篇,英文9篇。CTLA-4基因A49G多态性的基因频率模型、共显性模型、显性模型、隐性模型合并OR值（95%CI）分别是1.94（1.67-2.25）、3.93（2.84-5.45）、2.69（2.07-3.50）、2.09（1.73-2.53）;CTLA-4基因CT60位点多态性的基因频率模型、共显性模型、显性模型、隐性模型合并OR值（95%CI）分别是1.38（1.26-1.51）、1.61（1.28-2.03）、1.58（1.26-1.97）、1.40（1.26-1.56）。结论 GD病与CTLA-4基因A49G和CT60位点多态性有关,且为正相关,即两位点多态性是GD病发病的危险因素。
