Hepatocellular carcinoma(HCC),which is essentially primary liver cancer,is closely related to CD8^(+)T cell immune infiltration and immune suppression.We constructed a CD8^(+)T cells related risk score model to predic...Hepatocellular carcinoma(HCC),which is essentially primary liver cancer,is closely related to CD8^(+)T cell immune infiltration and immune suppression.We constructed a CD8^(+)T cells related risk score model to predict the prognosis of HCC patients and provided therapeutic guidance based on the risk score.Using integrated bulk RNA sequencing(RNA-seq)and single-cell RNA sequencing(scRNA-seq)datasets,we identified stable CD8^(+)T cell signatures.Based on these signatures,a 3-gene risk score model,comprised of KLRB1,RGS 2,and TNFRSF1B was constructed.The risk score model was well validated through an independent external validation cohort.We divided patients into high-risk and low-risk groups according to the risk score and compared the differences in immune microenvironment between these two groups.Compared with low-risk patients,high-risk patients have higher M2-type macrophage content(P<0.0001)and lower CD8^(+)T cells infiltration(P<0.0001).High-risk patients predict worse response to immunotherapy treatment than low-risk patients(P<0.01).Drug sensitivity analysis shows that PI3K-β inhibitor AZD6482 and TGFβRII inhibitor SB505124 may be suitable therapies for high-risk patients,while the IGF-1R inhibitor BMS-754807 or the novel pyrimidine-based anti-tumor metabolic drug Gemcitabine could be potential therapeutic choices for low-risk patients.Moreover,expression of these 3-gene model was verified by immunohistochemistry.In summary,the establishment and validation of a CD8^(+)T cell-derived risk model can more accurately predict the prognosis of HCC patients and guide the construction of personalized treatment plans.展开更多
目的研究细胞程序性死亡配体-1(programmed cell death protein ligand-1,PD-L1)功能抑制调控免疫活化影响ApoE^(-/-)小鼠动脉粥样硬化发生发展的机制。方法将24只ApoE^(-/-)小鼠随机分为正常组,高脂组和高脂^(+)抗PD-L1单抗组,通过高...目的研究细胞程序性死亡配体-1(programmed cell death protein ligand-1,PD-L1)功能抑制调控免疫活化影响ApoE^(-/-)小鼠动脉粥样硬化发生发展的机制。方法将24只ApoE^(-/-)小鼠随机分为正常组,高脂组和高脂^(+)抗PD-L1单抗组,通过高胆固醇饲料喂养建立动脉粥样硬化(atherosclerosis)模型。实验动物饲养70 d后,分离各组实验动物血管(主动脉根部至腹主动脉)及肝脏组织,进行油红O染色;HE染色检测肝组织病理改变;ELISA检测血清中总胆固醇(CHO)、甘油三酯(TG)、高密度脂蛋白(HDL-c)、低密度脂蛋白(LDL-c)和炎症因子(IFN-γ、TNF-α、IL-1β)含量。流式细胞计数检测肝脏淋巴细胞(CD4^(+)、CD8^(+)、CD4^(+)IFN-γ^(+)和CD8^(+)IFN-γ^(+)T细胞)。RT-PCR检测肝脏组织IFN-γ、TNF-α、IL-1β、CD4和CD8表达。结果与高脂组比较,给予抗PD-L1单抗后促血管壁及肝脏脂质累积并上调血清及肝组织CHO、TG、LDL-c和HDL-c含量。高脂饲养条件下给予抗PD-L1单抗促血清和肝组织谷丙转氨酶(GPT)和谷草转氨酶(GOT)含量升高,但是对碱性磷酸酶(AKP)含量没有影响。高脂饲养条件下给予抗PD-L1单抗促血清和肝脏组织IFN-γ、TNF-α和IL-1β含量升高。高脂饲养条件下给予抗PD-L1单抗抑制CD4表达及促CD8表达。高脂饲养条件下给予抗PD-L1单抗促肝脏CD8^(+)T和CD8^(+)IFN-γ^(+)T细胞活化,但是对CD4^(+)IFN-γ^(+)T细胞活化没有影响。结论高脂饲养条件下给予抗PD-L1单抗通过活化肝脏CD8^(+)IFN-γ^(+)T细胞损伤肝脏功能加重动脉粥样硬化。展开更多
A novel coronavirus, severe acute respiratory syndrome (SA RS)-associated coronavirus (SARS-CoV), has been identified as the causal agent of SARS. Spike (S) protein is a major structural glycoprotein of the SARS virus...A novel coronavirus, severe acute respiratory syndrome (SA RS)-associated coronavirus (SARS-CoV), has been identified as the causal agent of SARS. Spike (S) protein is a major structural glycoprotein of the SARS virus and a potential target for SARS-specific cell-mediated immune responses. A pa nel of S protein-derived peptides was tested for their binding affinity to HLA -A *0201 molecules. Peptides with high affinity for HLA-A *0201 were then as se ssed for their capacity to elicit specific immune responses mediated by cytotoxi c T lymphocytes (CTLs) both in vivo, in HLA-A2.1/K b transgenic mice, a nd in vitro, from peripheral blood lymphocytes (PBLs) harvested from healthy HLA-A 2.1 + donors. SARS-CoV protein-derived peptide-1 (SSp-1 RLNEVAKNL), induced pepti de-specific CTLs both in vivo (transgenic mice) and in vitro (human PBL s), which specifically released interferon-gamma (IFN-gamma) upon stimulation with SSp-1-pulsed autologous dendritic cells (DCs) or T2 cells. SSp-1-specif ic CTLs also lysed major histocompatibility complex (MHC)-matched tumor cell lines engineered to express S proteins. HLA-A *0201-SSp-1 tetramer staining re vealed the presence of significant populations of SSp-1-specific CTLs in SSp- 1-induced CD8 + T cells. We propose that the newly identified epitope SSp-1 w ill help in the characterization of virus control mechanisms and immunopathology in SARS-CoV infection, and may be relevant to the development of immunotherape utic approaches for SARS.展开更多
基金国家自然科学基金项目(No.81902513)山西省应用基础研究计划项目(No.202303021211114 and 202103021224228)山西省高等教育百亿工程“科技引导”专项(No.BYJL047)资助。
文摘Hepatocellular carcinoma(HCC),which is essentially primary liver cancer,is closely related to CD8^(+)T cell immune infiltration and immune suppression.We constructed a CD8^(+)T cells related risk score model to predict the prognosis of HCC patients and provided therapeutic guidance based on the risk score.Using integrated bulk RNA sequencing(RNA-seq)and single-cell RNA sequencing(scRNA-seq)datasets,we identified stable CD8^(+)T cell signatures.Based on these signatures,a 3-gene risk score model,comprised of KLRB1,RGS 2,and TNFRSF1B was constructed.The risk score model was well validated through an independent external validation cohort.We divided patients into high-risk and low-risk groups according to the risk score and compared the differences in immune microenvironment between these two groups.Compared with low-risk patients,high-risk patients have higher M2-type macrophage content(P<0.0001)and lower CD8^(+)T cells infiltration(P<0.0001).High-risk patients predict worse response to immunotherapy treatment than low-risk patients(P<0.01).Drug sensitivity analysis shows that PI3K-β inhibitor AZD6482 and TGFβRII inhibitor SB505124 may be suitable therapies for high-risk patients,while the IGF-1R inhibitor BMS-754807 or the novel pyrimidine-based anti-tumor metabolic drug Gemcitabine could be potential therapeutic choices for low-risk patients.Moreover,expression of these 3-gene model was verified by immunohistochemistry.In summary,the establishment and validation of a CD8^(+)T cell-derived risk model can more accurately predict the prognosis of HCC patients and guide the construction of personalized treatment plans.
文摘目的研究细胞程序性死亡配体-1(programmed cell death protein ligand-1,PD-L1)功能抑制调控免疫活化影响ApoE^(-/-)小鼠动脉粥样硬化发生发展的机制。方法将24只ApoE^(-/-)小鼠随机分为正常组,高脂组和高脂^(+)抗PD-L1单抗组,通过高胆固醇饲料喂养建立动脉粥样硬化(atherosclerosis)模型。实验动物饲养70 d后,分离各组实验动物血管(主动脉根部至腹主动脉)及肝脏组织,进行油红O染色;HE染色检测肝组织病理改变;ELISA检测血清中总胆固醇(CHO)、甘油三酯(TG)、高密度脂蛋白(HDL-c)、低密度脂蛋白(LDL-c)和炎症因子(IFN-γ、TNF-α、IL-1β)含量。流式细胞计数检测肝脏淋巴细胞(CD4^(+)、CD8^(+)、CD4^(+)IFN-γ^(+)和CD8^(+)IFN-γ^(+)T细胞)。RT-PCR检测肝脏组织IFN-γ、TNF-α、IL-1β、CD4和CD8表达。结果与高脂组比较,给予抗PD-L1单抗后促血管壁及肝脏脂质累积并上调血清及肝组织CHO、TG、LDL-c和HDL-c含量。高脂饲养条件下给予抗PD-L1单抗促血清和肝组织谷丙转氨酶(GPT)和谷草转氨酶(GOT)含量升高,但是对碱性磷酸酶(AKP)含量没有影响。高脂饲养条件下给予抗PD-L1单抗促血清和肝脏组织IFN-γ、TNF-α和IL-1β含量升高。高脂饲养条件下给予抗PD-L1单抗抑制CD4表达及促CD8表达。高脂饲养条件下给予抗PD-L1单抗促肝脏CD8^(+)T和CD8^(+)IFN-γ^(+)T细胞活化,但是对CD4^(+)IFN-γ^(+)T细胞活化没有影响。结论高脂饲养条件下给予抗PD-L1单抗通过活化肝脏CD8^(+)IFN-γ^(+)T细胞损伤肝脏功能加重动脉粥样硬化。
文摘A novel coronavirus, severe acute respiratory syndrome (SA RS)-associated coronavirus (SARS-CoV), has been identified as the causal agent of SARS. Spike (S) protein is a major structural glycoprotein of the SARS virus and a potential target for SARS-specific cell-mediated immune responses. A pa nel of S protein-derived peptides was tested for their binding affinity to HLA -A *0201 molecules. Peptides with high affinity for HLA-A *0201 were then as se ssed for their capacity to elicit specific immune responses mediated by cytotoxi c T lymphocytes (CTLs) both in vivo, in HLA-A2.1/K b transgenic mice, a nd in vitro, from peripheral blood lymphocytes (PBLs) harvested from healthy HLA-A 2.1 + donors. SARS-CoV protein-derived peptide-1 (SSp-1 RLNEVAKNL), induced pepti de-specific CTLs both in vivo (transgenic mice) and in vitro (human PBL s), which specifically released interferon-gamma (IFN-gamma) upon stimulation with SSp-1-pulsed autologous dendritic cells (DCs) or T2 cells. SSp-1-specif ic CTLs also lysed major histocompatibility complex (MHC)-matched tumor cell lines engineered to express S proteins. HLA-A *0201-SSp-1 tetramer staining re vealed the presence of significant populations of SSp-1-specific CTLs in SSp- 1-induced CD8 + T cells. We propose that the newly identified epitope SSp-1 w ill help in the characterization of virus control mechanisms and immunopathology in SARS-CoV infection, and may be relevant to the development of immunotherape utic approaches for SARS.
