Background:Cytotoxic T lymphocytes(CD8+T)cells function critically in mediating anti-tumor immune response in cancer patients.Characterizing the specific functions of CD8+T cells in lung adenocarcinoma(LUAD)could help ...Background:Cytotoxic T lymphocytes(CD8+T)cells function critically in mediating anti-tumor immune response in cancer patients.Characterizing the specific functions of CD8+T cells in lung adenocarcinoma(LUAD)could help better understand local anti-tumor immune responses and estimate the effect of immunotherapy.Methods:Gens related to CD8+T cells were identified by cluster analysis based on the single-cell sequencing data of three LUAD tissues and their paired normal tissues.Weighted gene co-expression network analysis(WGCNA),consensus clustering,differential expression analysis,least absolute shrinkage and selection operator(LASSO)and Cox regression analysis were conducted to classify molecular subtypes for LUAD and to develop a risk model using prognostic genes related to CD8+T cells.Expression of the genes in the prognostic model,their effects on tumor cell invasion,and interactions with CD8+T cells were verified by cell experiments.Results:This study defined two LUAD clusters(CD8+0 and CD8+1)based on CD8+T cells,with cluster CD8+0 being significantly associated with the prognosis of LUAD.Three heterogeneous subtypes(clusters 1,2,and 3)differing in prognosis,genome mutation events,and immune status were categorized using 42 prognostic genes.A prognostic model created based on 11 significant genes(including CD200R1,CLEC17A,ZC3H12D,GNG7,SNX30,CDCP1,NEIL3,IGF2BP1,RHOV,ABCC2,and KRT81)was able to independently estimate the death risk for patients in different LUAD cohorts.Moreover,the model also showed general applicability in external validation cohorts.Low-risk patients could benefit more from taking immunotherapy and were significantly related to the resistance to anticancer drugs.The results from cell experiments demonstrated that the expression of CD200R1,CLEC17A,ZC3H12D,GNG7,and SNX30 was significantly downregulated,while that of CDCP1,NEIL3,IGF2BP1,RHOV,ABCC2 and KRT81 was upregulated in LUAD cells.Inhibition of CD200R1 greatly increased the invasiveness of the LUAD cells,but inhibiting CDCP1 expression weakened the invasion ability of LUAD cells.Conclusion:This study defined two prognostic CD8+T cell clusters and classified three heterogeneous molecular subtypes for LUAD.A prognostic model predictive of the potential effects of immunotherapy on LUAD patients was developed.展开更多
目的探究外周血群集分化8阳性细胞(cluster of differentiation 8-positive cells,CD8+)T淋巴细胞水平和循环肿瘤细胞(circulating tumor cell,CTC)表达对Ⅲ期结直肠癌根治性术后辅助放化疗患者预后的影响。方法选取我院进行治疗的Ⅲ期...目的探究外周血群集分化8阳性细胞(cluster of differentiation 8-positive cells,CD8+)T淋巴细胞水平和循环肿瘤细胞(circulating tumor cell,CTC)表达对Ⅲ期结直肠癌根治性术后辅助放化疗患者预后的影响。方法选取我院进行治疗的Ⅲ期结直肠癌根治性术后辅助放化疗患者156例作为本次研究对象,对患者进行为期6个月的随访,根据患者在随访期内是否复发进行分组:未复发组112例,复发组44例,对患者术后1 d的T淋巴细胞亚群水平进行检测,并对其CTC表达水平进行检测,探究CTC表达阳性率与患者临床病理特征间的关系,并探究上述指标对患者预后的预测价值。结果与未复发组相比,复发组CD3+、CD4+、CD4+/CD8+水平较低,但CD8+水平较高(P<0.05)。测定患者外周血中CTC表达情况,未复发组CTC计数为(2.56±0.87)个,复发组CTC计数为(6.68±2.74)个,差异有统计学意义(t=9.782,P<0.05)。患者CTC表达与患者的性别、年龄、淋巴结是否转移、组织分化程度无关(P>0.05)。采用ROC曲线分析T淋巴细胞亚群水平及CTC表达对患者复发的预测价值,CD3+、CD4+、CD8+、CD4+/CD8+及CTC表达对患者术后复发曲线下面积(area under the curve,AUC)分别为0.852、0.703、0.712、0.747、0.920,对上述指标联合应用对患者的复发情况进行预测,其AUC值为0.954。结论患者的CD3+、CD4+、CD4+/CD8+低表达,CD8+及CTC高表达会增加Ⅲ期结直肠癌根治性术后辅助放化疗患者术后复发概率,且各指标联合检测对患者预后结局具有一定预测价值。展开更多
文摘目的研究长链非编码RNA(long non-coding RNA,LncRNA)LINC01137在非小细胞肺癌(nonsmall cell lung cancer,NSCLC)免疫逃逸中的生物学功能及其潜在的调节机制。方法采集24例健康志愿者和24例NSCLC患者血液样本,并收集NSCLC肿瘤组织和癌旁组织检测LINC01137水平。利用Starbase数据库预测LINC01137与miR-22-3p的结合位点,荧光素酶报告基因分析进行验证。采用A549细胞来源的外泌体和/或sh-LINC01137干扰序列转染A549细胞,检测细胞增殖和侵袭能力;收集转染后的细胞上清液培养CD8^(+)T细胞,检测CD8^(+)T细胞耗竭标志物干扰素-γ(interfereron-γ,IFN-γ)、肿瘤坏死因子-α(tumor necrosis factor-α,TNF-α)、颗粒霉素B(granzyme B)和白细胞介素-2(interleukin-2,IL-2)水平,以及PD-1+Tim3^(+)CD8^(+)T细胞百分比。采用外泌体和/或miR-22-3p模拟物(miR-22-3p mimic)转染CD8^(+)T细胞,检测PD-1蛋白水平。结果与癌旁组织相比,NSCLC肿瘤组织中LINC01137表达(3.357±0.548 vs 1.011±0.371)明显升高;与健康志愿者相比,NSCLC患者外周血LINC01137表达(3.216±0.342 vs 1.007±0.313)亦明显升高,差异具有统计学意义(t=-17.367,-17.147,均P<0.001)。肿瘤组织LINC01137表达与外周血中LINC01137表达呈正相关(r=0.755,P<0.05)。在A549细胞来源的外泌体中LINC01137显著富集。与Exo+sh-NC组相比,Exo+sh-LINC01137组细胞活力(65.852%±4.715%vs 100.153%±11.934%)及细胞侵袭(21.464%±3.481%vs 43.126%±1.447%)能力显著降低,差异具有统计学意义(t=4.630,9.953,均P<0.01)。NSCLC患者外周血中LINC01137表达和CD8^(+)T细胞百分比呈负相关(r=-0.520,P<0.05)。与Exo+sh-NC组相比,Exo+sh-LINC01137组IFN-γ(3865.314±543.852 pg/ml vs 1786.971±105.982 pg/ml),TNF-α(4631.930±510.715pg/ml vs 1973.242±379.623pg/ml),Granzyme B(3876.496±312.438pg/ml vs 1879.439±287.584pg/ml)和IL-2 mRNA水平(3.286±0.437 vs 1.015±0.314)升高,PD-1+Tim3^(+)CD8^(+)T细胞百分比(7.680%±2.185%vs 18.952%±3.216%)降低,差异具有统计学意义(t=-6.497,-7.237,-8.146,-7.310,5.021,均P<0.01)。miR-22-3p是LINC01137的靶基因。与Exo+NC mimic组相比,Exo+miR-22-3p组PD-1蛋白水平(0.384±0.087 vs 1.003±0.147)显著降低,差异有统计学意义(t=6.277,P<0.01)。结论NSCLC患者肿瘤组织及外周血中LINC01137表达显著上调;NSCLC细胞来源的外泌体中LINC01137通过靶向CD8^(+)T细胞中miR-22-3p并抑制其表达,诱导CD8^(+)T细胞耗竭,促进NSCLC细胞免疫逃逸。
文摘Background:Cytotoxic T lymphocytes(CD8+T)cells function critically in mediating anti-tumor immune response in cancer patients.Characterizing the specific functions of CD8+T cells in lung adenocarcinoma(LUAD)could help better understand local anti-tumor immune responses and estimate the effect of immunotherapy.Methods:Gens related to CD8+T cells were identified by cluster analysis based on the single-cell sequencing data of three LUAD tissues and their paired normal tissues.Weighted gene co-expression network analysis(WGCNA),consensus clustering,differential expression analysis,least absolute shrinkage and selection operator(LASSO)and Cox regression analysis were conducted to classify molecular subtypes for LUAD and to develop a risk model using prognostic genes related to CD8+T cells.Expression of the genes in the prognostic model,their effects on tumor cell invasion,and interactions with CD8+T cells were verified by cell experiments.Results:This study defined two LUAD clusters(CD8+0 and CD8+1)based on CD8+T cells,with cluster CD8+0 being significantly associated with the prognosis of LUAD.Three heterogeneous subtypes(clusters 1,2,and 3)differing in prognosis,genome mutation events,and immune status were categorized using 42 prognostic genes.A prognostic model created based on 11 significant genes(including CD200R1,CLEC17A,ZC3H12D,GNG7,SNX30,CDCP1,NEIL3,IGF2BP1,RHOV,ABCC2,and KRT81)was able to independently estimate the death risk for patients in different LUAD cohorts.Moreover,the model also showed general applicability in external validation cohorts.Low-risk patients could benefit more from taking immunotherapy and were significantly related to the resistance to anticancer drugs.The results from cell experiments demonstrated that the expression of CD200R1,CLEC17A,ZC3H12D,GNG7,and SNX30 was significantly downregulated,while that of CDCP1,NEIL3,IGF2BP1,RHOV,ABCC2 and KRT81 was upregulated in LUAD cells.Inhibition of CD200R1 greatly increased the invasiveness of the LUAD cells,but inhibiting CDCP1 expression weakened the invasion ability of LUAD cells.Conclusion:This study defined two prognostic CD8+T cell clusters and classified three heterogeneous molecular subtypes for LUAD.A prognostic model predictive of the potential effects of immunotherapy on LUAD patients was developed.
文摘目的探究外周血群集分化8阳性细胞(cluster of differentiation 8-positive cells,CD8+)T淋巴细胞水平和循环肿瘤细胞(circulating tumor cell,CTC)表达对Ⅲ期结直肠癌根治性术后辅助放化疗患者预后的影响。方法选取我院进行治疗的Ⅲ期结直肠癌根治性术后辅助放化疗患者156例作为本次研究对象,对患者进行为期6个月的随访,根据患者在随访期内是否复发进行分组:未复发组112例,复发组44例,对患者术后1 d的T淋巴细胞亚群水平进行检测,并对其CTC表达水平进行检测,探究CTC表达阳性率与患者临床病理特征间的关系,并探究上述指标对患者预后的预测价值。结果与未复发组相比,复发组CD3+、CD4+、CD4+/CD8+水平较低,但CD8+水平较高(P<0.05)。测定患者外周血中CTC表达情况,未复发组CTC计数为(2.56±0.87)个,复发组CTC计数为(6.68±2.74)个,差异有统计学意义(t=9.782,P<0.05)。患者CTC表达与患者的性别、年龄、淋巴结是否转移、组织分化程度无关(P>0.05)。采用ROC曲线分析T淋巴细胞亚群水平及CTC表达对患者复发的预测价值,CD3+、CD4+、CD8+、CD4+/CD8+及CTC表达对患者术后复发曲线下面积(area under the curve,AUC)分别为0.852、0.703、0.712、0.747、0.920,对上述指标联合应用对患者的复发情况进行预测,其AUC值为0.954。结论患者的CD3+、CD4+、CD4+/CD8+低表达,CD8+及CTC高表达会增加Ⅲ期结直肠癌根治性术后辅助放化疗患者术后复发概率,且各指标联合检测对患者预后结局具有一定预测价值。
