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Tumor-derived DEFB1 induces immune tolerance by inhibiting maturation of dendritic cell and impairing CD8+T cell function in esophageal squamous cell carcinoma
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作者 Jingjing Duan Haotian Wang +10 位作者 Minglu Liu Yin Chen Ning Li Jieqiong Liu Lingxiong Wang Lin Li Yaru Liu Pengfei Dong Xiuxuan Wang Zhongyi Fan Shunchang Jiao 《Chinese Journal of Cancer Research》 SCIE CAS CSCD 2024年第4期351-367,共17页
Objective:CD8+T cells are the key effector cells in the anti-tumor immune response.The mechanism underlying the infiltration of CD8+T cells in esophageal squamous cell carcinoma(ESCC)has not been clearly elucidated.Me... Objective:CD8+T cells are the key effector cells in the anti-tumor immune response.The mechanism underlying the infiltration of CD8+T cells in esophageal squamous cell carcinoma(ESCC)has not been clearly elucidated.Methods:Fresh ESCC tissues were collected and grouped according to the infiltration density of CD8+T cells.After the transcriptome sequencing on these samples and the combined analyses with The Cancer Genome Atlas(TCGA)ESCC data,a secreted protein DEFB1 was selected to explore its potential role in the infiltration of CD8+T cells.Bioinformatics analyses,histological verification and in vitro experiments were then performed.Results:DEFB1 was highly expressed in ESCC,and the high expression of DEFB1 was an independent risk factor for overall survival.Since the up-regulation or down-regulation of DEFB1 did not affect the proliferation,migration and apoptosis of ESCC cells,we speculated that the oncogenic effect of DEFB1 was achieved by regulating microenvironmental characteristics.Bioinformatics analyses suggested that DEFB1 might play a major role in the inflammatory response and anti-tumor immune response,and correlate to the infiltration of immature dendritic cell(imDC)in ESCC.Histological analyses further confirmed that there were less CD8+T cells infiltrated,less CD83+mature DC(mDC)infiltrated and more CD1a+imDC infiltrated in those ESCC samples with high expression of DEFB1.After the treatment with recombinant DEFB1 protein,the maturation of DC was hindered significantly,followed by the impairment of the killing effects of T cells in both 2D and 3D culture in vitro.Conclusions:Tumor-derived DEFB1 can inhibit the maturation of DC and weaken the function of CD8+T cells,accounting for the immune tolerance in ESCC.The role of DEFB1 in ESCC deserves further exploration. 展开更多
关键词 CD8+T cells DEFB1 dendritic cells esophageal squamous cell carcinoma tumor immune microenvironment
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Predicting the Prognosis and Immunotherapeutic Response of Triple-Negative Breast Cancer by Constructing a Prognostic Model Based on CD8+T Cell-Related Immune Genes
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作者 Nani Li Xiaoting Qiu +3 位作者 Jingsong Xue Limu Yi Mulan Chen Zhijian Huang 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 2024年第6期581-593,共13页
Objective Triple-negative breast cancer(TNBC)poses a significant challenge for treatment efficacy.CD8+T cells,which are pivotal immune cells,can be effectively analyzed for differential gene expression across diverse ... Objective Triple-negative breast cancer(TNBC)poses a significant challenge for treatment efficacy.CD8+T cells,which are pivotal immune cells,can be effectively analyzed for differential gene expression across diverse cell populations owing to rapid advancements in sequencing technology.By leveraging these genes,our objective was to develop a prognostic model that accurately predicts the prognosis of patients with TNBC and their responsiveness to immunotherapy.Methods Sample information and clinical data of TNBC were sourced from The Cancer Genome Atlas and METABRIC databases.In the initial stage,we identified 67 differentially expressed genes associated with immune response in CD8+T cells.Subsequently,we narrowed our focus to three key genes,namely CXCL13,GBP2,and GZMB,which were used to construct a prognostic model.The accuracy of the model was assessed using the validation set data and receiver operating characteristic(ROC)curves.Furthermore,we employed various methods,including Kyoto Encyclopedia of Genes and Genomes(KEGG)pathway,immune infiltration,and correlation analyses with CD274(PD-L1)to explore the model's predictive efficacy in immunotherapeutic responses.Additionally,we investigated the potential underlying biological pathways that contribute to divergent treatment responses.Results We successfully developed a model capable of predicting the prognosis of patients with TNBC.The areas under the curve(AUC)values for the 1-,3-,and 5-year survival predictions were 0.618,0.652,and 0.826,respectively.Employing this risk model,we stratified the samples into high-and low-risk groups.Through KEGG enrichment analysis,we observed that the high-risk group predominantly exhibited enrichment in metabolism-related pathways such as drug and chlorophyll metabolism,whereas the low-risk group demonstrated significant enrichment in cytokine pathways.Furthermore,immune landscape analysis revealed noteworthy variations between(PD-L1)expression and risk scores,indicating that our model effectively predicted the response of patients to immune-based treatments.Conclusion Our study demonstrates the potential of CXCL13,GBP2,and GZMB as prognostic indicators of clinical outcomes and immunotherapy responses in patients with TNBC.These findings provide valuable insights and novel avenues for developing immunotherapeutic approaches targeting TNBC. 展开更多
关键词 Breast Cancer IMMUNOTHERAPY PROGNOSIS CD8+T cells PD-L1
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Smad8 is involvement in follicular development via the regulation of granulosa cell growth and steroidogenesis in mice
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作者 DAOLUN YU DEYONG SHE +4 位作者 KAI GE LEI YANG RUINA ZHAN SHAN LU YAFEI CAI 《BIOCELL》 SCIE 2024年第1期139-147,共9页
Background:SMAD family proteins(SMADs)are crucial transcription factors downstream of transforming growth factor beta(TGF-ß)/SMAD signaling pathways that have been reported to play a pivotal role in mammalian rep... Background:SMAD family proteins(SMADs)are crucial transcription factors downstream of transforming growth factor beta(TGF-ß)/SMAD signaling pathways that have been reported to play a pivotal role in mammalian reproduction.However,the role of SMAD family member 8(SMAD8,also known as SMAD9),a member of the SMAD family,in mammalian reproduction remains unclear.Methods:We employed RNA interference techniques to knock down Smad8 expression in mouse granulosa cells(GCs)to investigate the effects of Smad8 on GC growth and steroidogenesis.Results:Our findings revealed a significant decrease in the proliferative capacity and a substantial increase in the apoptosis rate of GCs after transfection with Smad8-siRNA for 48 h.Subsequent hormone assays demonstrated a significant decrease in estradiol(E2)levels,whereas progesterone(P4)remained unchanged.Further mechanistic analysis showed that the mRNA expression of proliferating cell nuclear antigen(Pcna),Cyclin D2,cell cycle-dependent kinase 4(Cdk4),B-cell lymphoma-2(Bcl-2),estrogen receptor(Er),luteinizing hormone receptor(Lhr)and cytochrome P450 family 19 subfamily A member 1(Cyp19a1)significantly decreased.Conversely,the mRNA of cysteine aspartate proteinase 3(Caspase 3)significantly increased,wheras Bcl2-associated X(Bax),folliclestimulating hormone receptor(Fshr)and cytochrome P450 family 11 subfamily A member 1(Cyp11a1)remained unchanged compared to the controls.Conclusion:This study indicates that Smad8 knockdown inhibits cell proliferation,promotes apoptosis,reduces Er and Lhr transcription,and decreases E2 production in mouse GCs.These findings suggest that Smad8 may serve as a novel genetic marker for mammalian reproduction. 展开更多
关键词 MOUSE Smad8 RNA interference Granulosa cells Growth and steroidogenesis
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Identification of prognostic molecular subtypes and model based on CD8+ T cells for lung adenocarcinoma
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作者 HONGMIN CAO YING XUE +3 位作者 FEI WANG GUANGYAO LI YULAN ZHEN JINGWEN GUO 《BIOCELL》 SCIE 2024年第3期473-490,共18页
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
关键词 CD8+T cell Lung adenocarcinoma Molecular subtype Prognostic model IMMUNOTHERAPY
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Inhibitory Effect of Flavonoid Glycosides from Chlorophytum comosum on Nasopharyngeal Carcinoma 5-8F Cells and Its Mechanism
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作者 Chenliang CHU Xinchen WANG +2 位作者 Kuan LU Liang QIN Lu JIN 《Medicinal Plant》 2024年第1期66-70,共5页
[Objectives]To study the inhibitory activity of two flavonoid glycosides isolated from Chlorophytum comosum Laxum R.Br on human nasopharyngeal carcinoma(NPC)cell line 5-8F in vitro and its mechanism.[Methods]The flavo... [Objectives]To study the inhibitory activity of two flavonoid glycosides isolated from Chlorophytum comosum Laxum R.Br on human nasopharyngeal carcinoma(NPC)cell line 5-8F in vitro and its mechanism.[Methods]The flavonoid glycosides were isolated and purified from the ethanol alcoholic extract of the roots of Liliaceae plant Chlorophytum comosum by silica gel column chromatography,macroporous resin column chromatography,Sephadex LH-20,and reverse column chromatography(ODS).The inhibitory activity of flavonoid glycosides on human nasopharyngeal carcinoma cells was analyzed by CCK-8 method,and the potential mechanism was preliminarily analyzed by molecular docking.[Results]Two flavonoid glycosides were identified as isovitexin 2″-0-rhamnoside and 7-2″-di-O-β-glucopyranosylisovitexin.Two flavonoid glycosides showed promising inhibitory effect on human nasopharyngeal carcinoma cell line 5-8F,with IC_(50) values of 24.8 and 27.5μmol/L,respectively.Molecular docking results showed that the potential targets of two flavonoid glycosides include CyclinD1,Bcl-2β-Catenin,ILK,TGF-β,in addition,two glycosides showed higher predicted binding affinity towards CyclinD1,which verifies the cytotoxicity of the two compounds on human nasopharyngeal carcinoma cell line 5-8F in vitro.[Conclusions]Two flavonoid glycosides are the active molecules in Chlorophytum comosum that can inhibit the proliferation of human nasopharyngeal carcinoma cells,and have the potential to be used in the research and development of anti nasopharyngeal carcinoma drugs. 展开更多
关键词 Chlorophytum comosum Laxum R.Br. Flavonoid glycosides 5-8F cells Antitumor mechanism
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miR-567通过调控CDK8在NSCLC增殖、迁移和细胞周期中的作用及其临床相关性研究 被引量:1
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作者 李海洋 赵振山 +4 位作者 李静 戎瑶 郑爱民 郝孟辉 田发明 《国际检验医学杂志》 CAS 2024年第3期335-340,346,共7页
目的探讨微小RNA(miR)-567通过调控周期蛋白依赖性激酶8(CDK8)在非小细胞肺癌(NSCLC)增殖、迁移和细胞周期中的作用及其临床相关性研究。方法收集40例NSCLC患者的肿瘤组织和临近癌旁组织,采用实时荧光定量PCR(qRT-PCR)检测miR-567和CDK... 目的探讨微小RNA(miR)-567通过调控周期蛋白依赖性激酶8(CDK8)在非小细胞肺癌(NSCLC)增殖、迁移和细胞周期中的作用及其临床相关性研究。方法收集40例NSCLC患者的肿瘤组织和临近癌旁组织,采用实时荧光定量PCR(qRT-PCR)检测miR-567和CDK8的表达。将miR-NC mimic、miR-567 mimic、oe-NC和oe-CDK8转染至A549和H1975细胞中,使用qRT-PCR检测miR-567和CDK8的表达,CCK-8法检测细胞增殖水平,Transwell法检测细胞迁移水平,流式细胞术检测细胞周期变化。通过荧光素酶报告基因实验检测miR-567与CDK8的靶向性。结果在NSCLC患者的肿瘤组织中,miR-567表达降低,而CDK8表达升高,二者呈负相关(P<0.05)。在A549和H1975细胞中,miR-567 mimic组相较于miR-NC mimic组,miR-567表达升高,CDK8表达降低,细胞增殖和迁移水平降低,细胞G1期比例升高,S期比例降低;miR-567 mimic组在正常型CDK8中,荧光强度低于miR-NC mimic组;miR-567 mimic+oe-CDK8组相较于miR-567 mimic+oe-NC组,CDK8表达升高,细胞增殖和迁移水平升高,细胞G1期比例降低,S期比例升高。结论miR-567通过靶向抑制CDK8表达,控制肿瘤细胞在S期阻滞,从而抑制NSCLC的增殖和迁移能力。 展开更多
关键词 非小细胞肺癌 细胞周期 细胞周期蛋白依赖性激酶8 微小RNA-567
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MFG-E8抑制青光眼大鼠视网膜神经节细胞凋亡的机制研究
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作者 杨静 曾明兵 +2 位作者 杨军 史贻玉 陈海波 《中国医科大学学报》 CAS 北大核心 2024年第7期591-596,共6页
目的 探讨乳脂肪球表皮生长因子8 (MFG-E8)在青光眼大鼠视神经保护中的作用与机制。方法 构建青光眼大鼠模型,将MFG-E8或D89E注射至大鼠玻璃体腔内。检测大鼠的眼压变化。通过HE染色、TUNEL染色、免疫荧光染色分别检测大鼠视网膜组织病... 目的 探讨乳脂肪球表皮生长因子8 (MFG-E8)在青光眼大鼠视神经保护中的作用与机制。方法 构建青光眼大鼠模型,将MFG-E8或D89E注射至大鼠玻璃体腔内。检测大鼠的眼压变化。通过HE染色、TUNEL染色、免疫荧光染色分别检测大鼠视网膜组织病理损伤、节细胞凋亡和小胶质细胞激活水平;通过Western blotting检测视网膜组织中cleaved caspase-3、caspase-3、cleaved caspase-9、caspase-9和BAX蛋白表达;通过ELISA和实时定量PCR检测视网膜组织中IL-10、TGF-β和NGF的表达水平。结果 与对照组相比,青光眼大鼠的眼压显著增加,视网膜神经节细胞复合体(GCC)层变薄,凋亡节细胞增加,cleaved-caspase 3/caspase-3、cleaved caspase-9/caspase-9和BAX水平升高,IBA1阳性细胞数增加,且IL-10、TGF-β、NGF水平增高;经MFG-E8治疗后,青光眼大鼠视网膜GCC层厚度增加,cleaved caspase-3/caspase-3、cleaved caspase-9/caspase-9、BAX水平降低,IBA1阳性细胞数和IL-10、TGF-β、NGF水平均增加;而MFG-E8失活异构体D89E处理后,大鼠青光眼进展进一步加重。结论 MFG-E8能够介导小胶质细胞激活,抑制神经节细胞凋亡,减缓大鼠青光眼的进展。 展开更多
关键词 青光眼 乳脂肪球表皮生长因子8 视网膜神经节细胞 小胶质细胞
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乳腺癌患者病理特征与Bcl-2、CXCL13、PAX8表达情况的关系分析 被引量:1
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作者 王洋 刘伟 +2 位作者 韩晓东 马娜 秦蕊 《检验医学与临床》 CAS 2024年第10期1431-1435,共5页
目的分析乳腺癌患者病理特征与B细胞淋巴瘤/白血病-2基因(Bcl-2)、趋化因子配体13(CXCL13)、配对盒基因8抗体(PAX8)表达情况的关系。方法收集2021年1月至2023年1月该院收治的160例乳腺癌患者临床资料。采用免疫组化法对其癌组织与癌旁组... 目的分析乳腺癌患者病理特征与B细胞淋巴瘤/白血病-2基因(Bcl-2)、趋化因子配体13(CXCL13)、配对盒基因8抗体(PAX8)表达情况的关系。方法收集2021年1月至2023年1月该院收治的160例乳腺癌患者临床资料。采用免疫组化法对其癌组织与癌旁组织Bcl-2、CXCL13、PAX8表达情况进行检测,并分析3项指标与患者病理特征的关系。结果与癌旁组织比较,癌组织Bcl-2、CXCL13、PAX8阳性率更高,差异有统计学意义(P<0.05)。与雌激素受体(ER)阴性、肿瘤最大径≥3 cm、孕激素受体(PR)阴性患者比较,ER阳性、肿瘤最大径<3 cm、PR阳性患者中Bcl-2高表达占比更高,差异有统计学意义(P<0.05);与无淋巴结转移、Ⅰ~Ⅱ期患者比较,淋巴结转移、Ⅲ~Ⅳ期患者中CXCL13高表达占比更高,差异有统计学意义(P<0.05);与Ⅰ~Ⅱ期、高/中分化、无淋巴结转移患者比较,Ⅲ~Ⅳ期、低分化、有淋巴结转移患者中PAX8高表达占比更高,差异有统计学意义(P<0.05)。ER、PR表达情况与Bcl-2表达情况呈正相关(P<0.05),肿瘤最大径与Bcl-2表达情况呈负相关(P<0.05);临床分期、淋巴结转移情况与CXCL13、PAX8表达情况呈正相关(P<0.05);分化程度与PAX8表达情况呈负相关(P<0.05)。结论乳腺癌患者Bcl-2、CXCL13、PAX8表达情况对疾病的发生和发展具有明显影响,有望成为评估乳腺癌患者病情严重程度的标志物。 展开更多
关键词 乳腺癌 B细胞淋巴瘤/白血病-2 趋化因子配体13 配对盒基因8抗体 临床病理
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急性胆囊炎患者胆囊切除术后血清CCK-8、TREM1水平与发生感染的关系
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作者 陈立坤 董彩丽 +4 位作者 顾春芳 杨淑红 尹玉杰 朱小静 渠兴甫 《检验医学与临床》 CAS 2024年第17期2476-2479,2485,共5页
目的分析急性胆囊炎(AC)患者胆囊切除术后血清胆囊收缩素-8(CCK-8)、髓系细胞触发受体1(TREM1)水平与发生感染的关系。方法将该院2020年12月至2022年12月收治的70例胆囊切除术后发生感染的AC患者纳入研究组,66例胆囊切除术后未发生感染... 目的分析急性胆囊炎(AC)患者胆囊切除术后血清胆囊收缩素-8(CCK-8)、髓系细胞触发受体1(TREM1)水平与发生感染的关系。方法将该院2020年12月至2022年12月收治的70例胆囊切除术后发生感染的AC患者纳入研究组,66例胆囊切除术后未发生感染的AC患者纳入对照组。采用酶联免疫吸附试验检测血清CCK-8、TREM1水平。采用Pearson相关分析胆囊切除术后发生感染AC患者血清中CCK-8、TREM1水平与炎症因子水平的相关性。采用受试者工作特征(ROC)曲线分析血清CCK-8、TREM1水平对AC患者胆囊切除术后发生感染的诊断价值。采用多因素Logistic回归分析AC患者胆囊切除术后感染的影响因素。结果研究组与对照组有胆囊结石、胆囊周边积液比例比较,差异均有统计学意义(P<0.05)。与对照组比较,研究组血清CCK-8水平明显降低,TREM1水平明显升高,差异均有统计学意义(P<0.05)。研究组C反应蛋白(CRP)、白细胞介素-8(IL-8)、肿瘤坏死因子-α(TNF-α)水平明显高于对照组,差异均有统计学意义(P<0.05)。胆囊切除术后发生感染的AC患者血清CCK-8水平与CRP、IL-8、TNF-α水平均呈负相关(P<0.05),TREM1水平与CRP、IL-8、TNF-α水平均呈正相关(P<0.05)。ROC曲线分析显示,血清CCK-8与TREM1联合检测诊断AC患者胆囊切除术后发生感染的曲线下面积(AUC)明显大于CCK-8、TREM1单独检测的AUC(Z=5.703,P<0.001;Z=4.584,P<0.001)。有胆囊结石、胆囊周边积液及血清CCK-8水平降低、血清TREM1水平升高均为AC患者胆囊切除术后发生感染的危险因素(P<0.05)。结论胆囊切除术后发生感染的AC患者血清CCK-8水平降低,TREM1水平升高,二者联合检测能够提高对AC患者胆囊切除术后发生感染的诊断价值。 展开更多
关键词 急性胆囊炎 胆囊收缩素-8 髓系细胞触发受体1 感染 酶联免疫吸附试验 胆囊切除术
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不同品牌ELISA试剂盒检测细胞培养上清液中IL-8对比研究
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作者 张梅 阳小凤 +2 位作者 饶忠美 余福勋 叶芝旭 《现代医药卫生》 2024年第5期741-744,749,共5页
目的 对比研究2种不同品牌ELISA试剂盒检测细胞培养上清液中人白细胞介素-8(IL-8)水平情况。方法 不同浓度聚肌胞苷酸(Poly I:C)刺激A549细胞10、24 h,收集细胞上清液,共获得40份样本,分为1~10组,每组4份。采用2种ELISA试剂盒(试剂盒A... 目的 对比研究2种不同品牌ELISA试剂盒检测细胞培养上清液中人白细胞介素-8(IL-8)水平情况。方法 不同浓度聚肌胞苷酸(Poly I:C)刺激A549细胞10、24 h,收集细胞上清液,共获得40份样本,分为1~10组,每组4份。采用2种ELISA试剂盒(试剂盒A、试剂盒B)检测细胞培养上清液中IL-8水平,对比2个试剂盒检测得到的组间数据或同组数据的一致性或差异性。结果 2种试剂盒拟合曲线中相关系数值分别为:0.999 600、0.999 602,检测标准品结果相关性良好。试剂盒B检测样品1、2组中IL-8水平比较,差异有统计学意义(P<0.01),但试剂盒A检测样品1、2组中IL-8水平比较,差异无统计学意义(P>0.05);2种试剂盒检测样品8、9组及样品9、10组中IL-8水平比较,差异均有统计学意义(P<0.01)。仅试剂盒B检测样品1、5组中IL-8水平明显低于试剂盒A,差异有统计学意义(P<0.01)。结论 不同品牌ELISA试剂盒均可用于检测IL-8水平,但检测结果仍在一定程度上存在差异。为避免实验误差,研究中应尽量选择同一个厂家生产的同品牌试剂盒。 展开更多
关键词 酶联免疫吸附试验 上皮细胞 白细胞介素-8 细胞培养 实验室检测
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细胞周期蛋白激酶抑制调控蛋白p21在HHV-8病毒裂解复制周期的作用
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作者 张庆 秦苏萍 +3 位作者 李小翠 王晓天 刘晓梅 周峰 《徐州医科大学学报》 CAS 2024年第2期95-99,共5页
目的研究细胞周期蛋白激酶抑制调控蛋白p21对人类疱疹病毒8型(human herpesvirus 8,HHV-8)病毒裂解复制周期的影响。方法组蛋白去乙酰化酶(histone deacetylase,HDAC)抑制剂SAHA预处理后,倒置荧光显微镜观察红色荧光蛋白(RFP)阳性的iSLK... 目的研究细胞周期蛋白激酶抑制调控蛋白p21对人类疱疹病毒8型(human herpesvirus 8,HHV-8)病毒裂解复制周期的影响。方法组蛋白去乙酰化酶(histone deacetylase,HDAC)抑制剂SAHA预处理后,倒置荧光显微镜观察红色荧光蛋白(RFP)阳性的iSLK.219细胞数,实时定量PCR检测TREx-K-Rta BCBL-1细胞中HHV-8病毒相关基因的mRNA水平。脂质体转染p21-siRNA后,免疫印迹法检测iSLK.219和TREx-K-Rta BCBL-1细胞中p21蛋白表达,计算RFP阳性iSLK.219细胞百分率,检测TREx-K-Rta BCBL-1细胞中ORF50和PAN的mRNA水平,CCK-8法和台盼蓝染色观察细胞存活情况。结果SAHA显著增强iSLK.219细胞RFP阳性率、TREx-K-Rta BCBL-1细胞中HHV-8裂解复制周期相关基因ORF50、PAN及K8.1的mRNA水平和p21蛋白表达,差异有统计学意义(P<0.05)。siRNA沉默p21后,iSLK.219细胞RFP阳性率、TREx-K-Rta BCBL-1细胞中HHV-8裂解复制周期相关基因ORF50和PAN mRNA水平显著下降,差异有统计学意义(P<0.05),且保护SAHA介导的TREx-K-Rta BCBL-1细胞死亡。结论抑制HDAC活性通过调控p21促进HHV-8病毒裂解复制。 展开更多
关键词 人类疱疹病毒8 病毒裂解复制周期 组蛋白去乙酰化酶 细胞周期蛋白激酶抑制调控蛋白p21 细胞死亡
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The Mechanisms of CD8+ T Cells Exhaustion in the Tumor Microenvironment and Immune Therapy 被引量:1
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作者 Haiyuan An Shiqi Song Jian Huang 《Journal of Cancer Therapy》 CAS 2023年第4期161-169,共9页
In the tumor immune microenvironment, CD8<sup>+</sup> T cells differentiate towards functional failure. The exhaustion of CD8<sup>+</sup> T cells (Tex) showed varying degrees of effect dysfunct... In the tumor immune microenvironment, CD8<sup>+</sup> T cells differentiate towards functional failure. The exhaustion of CD8<sup>+</sup> T cells (Tex) showed varying degrees of effect dysfunction, loss of proliferation ability, and sustained high expression of a variety of inhibitory receptors, with metabolic and epigenetic changes. Tex cells are heterogeneous, including several subsets with different characteristics at different stages of differentiation. Immune checkpoint inhibitors (ICIs) can restore the effect or function of Tex cells, indicating that this T cell subset plays a key role in tumor immunotherapy. The understanding of the mechanism of CD8<sup>+</sup> T cell exhaustion will be helpful to the implementation of tumor immunotherapy. This article reviews the production, differentiation and functional characteristics of Tex cells and their relationship with tumor immunotherapy. 展开更多
关键词 CD8+ T cell Exhaustion Exhausted CD8+ T cells IMMUNOTHERAPY TUMOR
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CCR8在卵巢癌浸润性Treg上的表达与意义 被引量:1
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作者 陶子琦 茅晔鹏 +6 位作者 刘书娜 娄鉴芳 付鑫 张磊 严丽娜 王婷 王芳 《南京医科大学学报(自然科学版)》 CAS 北大核心 2024年第3期305-312,共8页
目的:分析趋化因子受体8(C⁃C motif chemokine receptor 8,CCR8)在卵巢癌肿瘤浸润性调节性T细胞(regulatory T cell,Treg)中的表达,探讨CCR8对Treg分化的作用。方法:构建C57BL/6小鼠卵巢癌细胞ID8荷瘤模型;流式细胞术检测小鼠肿瘤组织... 目的:分析趋化因子受体8(C⁃C motif chemokine receptor 8,CCR8)在卵巢癌肿瘤浸润性调节性T细胞(regulatory T cell,Treg)中的表达,探讨CCR8对Treg分化的作用。方法:构建C57BL/6小鼠卵巢癌细胞ID8荷瘤模型;流式细胞术检测小鼠肿瘤组织、脾脏和外周血中Treg上CCR8的表达比例,CCR8^(+)Treg上免疫检查点相关蛋白程序性细胞死亡蛋白1(programmed cell death protein 1,PD⁃1)、细胞素性T淋巴细胞抗原4(cytotoxic T⁃lymphocyte antigen 4,CTLA⁃4)、可诱导的T细胞共刺激分子(inducible T cell costimulators,ICOS)、淋巴细胞激活基因3(lymphocyte activation gene 3,LAG⁃3)的表达;流式细胞术检测CCR8变构抑制剂AZ084加入前后对C57BL/6小鼠脾脏中初始CD4^(+)T细胞向Treg分化的影响。结果:卵巢癌荷瘤小鼠肿瘤中Treg上的CCR8表达相比脾脏、外周血的Treg显著增高;相比CCR8^(-)Treg,CCR8^(+)Treg上免疫检查点相关蛋白表达更高;AZ084有效抑制小鼠脾脏中初始CD4^(+)T细胞向Treg的分化。结论:CCR8^(+)Treg在肿瘤浸润性Treg中占主要比例,CCR8作为卵巢癌浸润性Treg的主要标志物,变构CCR8蛋白可以抑制Treg的分化。靶向消除CCR8^(+)Treg可为改善卵巢癌肿瘤微环境的免疫抑制状态提供新思路。 展开更多
关键词 卵巢癌 趋化因子受体8 调节性T细胞 趋化因子
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转录因子HOXC13通过上调PCNA表达促进喉鳞状细胞癌AMC-HN-8细胞的恶性生物学行为
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作者 兰利利 牛云峰 +3 位作者 胡国斌 刘猛 徐玉茹 王晶田 《中国肿瘤生物治疗杂志》 CAS CSCD 北大核心 2024年第6期558-565,共8页
目的:本研究旨在探讨转录因子HOXC13在喉鳞状细胞癌(LSCC)中的表达、功能及可能的调控机制。方法:常规培养LSCC细胞,将其分为sh-NC组、sh-HOXC13组、pcDNA3.1-NC组、pcDNA3.1-HOXC13组、pcDNA3.1-PCNA组和sh-HOXC13+pcDNA3.1-PCNA组,用... 目的:本研究旨在探讨转录因子HOXC13在喉鳞状细胞癌(LSCC)中的表达、功能及可能的调控机制。方法:常规培养LSCC细胞,将其分为sh-NC组、sh-HOXC13组、pcDNA3.1-NC组、pcDNA3.1-HOXC13组、pcDNA3.1-PCNA组和sh-HOXC13+pcDNA3.1-PCNA组,用转染试剂将相应核酸和质粒转染各组细胞。用数据库数据分析HOXC13mRNA在LSCC组织中的表达;收集2019年1月至2022年12月在联勤保障部队第九八〇医院耳鼻咽喉头颈外科手术切除的62对LSCC组织及配对的癌旁组织,免疫组织化学法检测中国人LSCC组织中HOXC13蛋白的表达,qPCR检测中国人LSCC组织、癌旁组织以及各组细胞中HOXC13和PCNAmRNA的表达,MTS法检测各组AMC-HN-8细胞的增殖能力,平板克隆实验检测各组AMC-HN-8细胞的克隆形成能力,Transwell小室实验检测各组AMC-HN-8细胞的迁移和侵袭能力,双萤光素酶报告基因实验和染色质免疫沉淀技术(ChIP)验证HOXC13与PCNA之间的结合关系。结果:HOXC13和PCNA在LSCC组织和细胞中均呈高表达(P<0.05或P<0.01)且两者的表达水平呈正相关(P<0.01),HOXC13的表达水平与TNM分期有明显关联(P<0.01)。敲减HOXC13可明显抑制AMC-HN-8细胞的增殖、迁移和侵袭能力(均P<0.01),过表达HOXC13则促进TU686细胞的增殖、迁移和侵袭能力(均P<0.01)。HOXC13可与PCNA启动子区结合并调控其转录。敲低PCNA可部分逆转HOXC13对AMC-HN-8细胞的恶性生物学行为的促进作用(均P<0.01)。结论:HOXC13通过上调PCNA促进LSCC细胞的恶性生物学行为,HOXC13是LSSC临床诊断和治疗的潜在靶点。 展开更多
关键词 转录因子 HOXC13 喉鳞状细胞癌 AMC-HN-8细胞 增殖 侵袭 迁移 PCNA
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miR-125a靶向转录无调性碱性螺旋环螺旋转录因子8对肺腺癌恶性进展的影响
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作者 姜昌瑞 张楚函 +1 位作者 刘洋 李玥 《中国医科大学学报》 北大核心 2024年第2期114-120,共7页
目的探讨miR-125a通过靶向转录无调性碱性螺旋环螺旋转录因子8(ATOH8)对肺腺癌恶性进展的影响。方法通过在线数据库UALCAN分析ATOH8在肺腺癌中的表达水平及其与患者生存率的相关性,以及miR-125a在肺腺癌中的表达水平及其与肺癌进展的关... 目的探讨miR-125a通过靶向转录无调性碱性螺旋环螺旋转录因子8(ATOH8)对肺腺癌恶性进展的影响。方法通过在线数据库UALCAN分析ATOH8在肺腺癌中的表达水平及其与患者生存率的相关性,以及miR-125a在肺腺癌中的表达水平及其与肺癌进展的关系;提取肺腺癌及癌旁正常组织总RNA,实时PCR分析ATOH8表达水平差异;将ATOH8过表达载体转染至肺腺癌细胞中,CCK-8法检测过表达ATOH8对肺腺癌细胞存活能力的影响;预测与ATOH8的3’非翻译区(UTR)结合的微RNA(miRNA),将miR-125a模拟物和抑制物转染至肺腺癌细胞中,实时PCR和Western blotting检测ATOH8的表达水平变化。结果数据库及实时PCR验证结果显示,ATOH8在肺腺癌组织中显著下调(P<0.01);过表达ATOH8能够显著降低肺腺癌细胞存活能力(P<0.05);高表达ATOH8组患者5年生存率显著升高(P<0.05);miR-125a能够与ATOH8的3’UTR结合,显著抑制其表达(P<0.05)。miR-125a在有吸烟史、中晚期和淋巴转移的肺腺癌患者中显著上调(P<0.05)。结论ATOH8是肺腺癌潜在的抑癌基因,能够抑制肺腺癌细胞存活的能力,影响患者的5年生存率。miR-125a表达水平与吸烟史、肿瘤分期和淋巴转移密切相关。miR-125a能够靶向抑制肺腺癌患者ATOH8表达,是ATOH8在肺腺癌中异常表达的潜在因素。 展开更多
关键词 无调性碱性螺旋环螺旋转录因子8 肺腺癌 miR-125a 细胞存活
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MicroRNA-370-5p inhibits pigmentation and cell proliferation by downregulating mitogen-activated protein kinase kinase kinase 8 expression in sheep melanocytes
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作者 JI Kai-yuan WEN Ru-jun +3 位作者 WANG Zheng-zhou TIAN Qian-qian ZHANG Wei ZHANG Yun-hai 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2023年第4期1131-1141,共11页
In mammals,microRNAs(miRNAs)play key roles in multiple biological processes by regulating the expression of target genes.Studies have found that the levels of miR-370-5p expression differ significantly in the skins of... In mammals,microRNAs(miRNAs)play key roles in multiple biological processes by regulating the expression of target genes.Studies have found that the levels of miR-370-5p expression differ significantly in the skins of sheep with different hair colors;however,its function remains unclear.In this study,we investigated the roles of miR-370-5p in sheep melanocytes and found that the overexpression of miR-370-5p significantly inhibited cell proliferation(P<0.01),tyrosinase activity(P=0.001)and significantly reduced(P<0.001)melanin production.Functional prediction revealed that the 3′-untranslated region(UTR)of MAP3K8 has a putative miR-370-5p binding site,and the interaction between these two molecules was confirmed using luciferase reporter assays.In situ hybridization assays revealed that MAP3K8 is expressed in the cytoplasm of melanocytes.The results of quantitative RT-PCR and Western blotting analyses revealed that overexpression of miR-370-5p in melanocytes significantly inhibits(P<0.01)MAP3K8 expression via direct targeting of its 3′UTR.Inhibition of MAP3K8 expression by siRNA-MAP3K8 transfection induced a significant inhibition(P<0.01)of melanocyte proliferation and significant reduction(P<0.001)in melanin production,which is consistent with our observations for miR-370-5p.Target gene rescue experiments indicated that the expression of MAP3K8 in melanocytes co-transfected with miR-370-5p and MAP3K8-cDNA(containing sites for the targeted binding to miR-370-5p)was significantly rescued(P≤0.001),which subsequently promoted significant increases in cell proliferation(P<0.001)and melanin production(P<0.01).Collectively,these findings indicate that miR-370-5p plays a functional role in inhibiting sheep melanocyte proliferation and melanogenesis by downregulating the expression of MAP3K8. 展开更多
关键词 MICRORNA mitogen-activated protein kinase kinase kinase 8 MELANOGENESIS sheep melanocytes cell proliferation
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Combined TIM-3 and PD-1 blockade restrains hepatocellular carcinoma development by facilitating CD4+ and CD8+T cellmediated antitumor immune responses
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作者 Xu-Sheng Zhang Hong-Cai Zhou +5 位作者 Peng Wei Long Chen Wei-Hu Ma Lin Ding Shi-Cai Liang Ben-Dong Chen 《World Journal of Gastrointestinal Oncology》 SCIE 2023年第12期2138-2149,共12页
BACKGROUND Immune checkpoint inhibitors(ICIs)targeting programmed cell death protein 1(PD-1)and T cell immunoglobulin and mucin domain-containing protein 3(TIM-3)are beneficial to the resumption of anti-tumor immunity... BACKGROUND Immune checkpoint inhibitors(ICIs)targeting programmed cell death protein 1(PD-1)and T cell immunoglobulin and mucin domain-containing protein 3(TIM-3)are beneficial to the resumption of anti-tumor immunity response and hold extreme potential as efficient therapies for certain malignancies.However,ICIs with a single target exhibit poor overall response rate in hepatocellular carcinoma(HCC)patients due to the complex pathological mechanisms of HCC.AIM To investigate the effects of combined TIM-3 and PD-1 blockade on tumor development in an HCC mouse model,aiming to identify more effective immunotherapies and provide more treatment options for HCC patients.METHODS The levels of PD-1 and TIM-3 on CD4+and CD8+T cells from tumor tissues,ascites,and matched adjacent tissues from HCC patients were determined with flow cytometry.An HCC xenograft mouse model was established and treated with anti-TIM-3 monoclonal antibody(mAb)and/or anti-PD-1 mAb.Tumor growth in each group was measured.Hematoxylin and eosin staining and immunohistochemical staining were used to evaluate T cell infiltration in tumors.The percentage of CD4+and CD8+T cells in tissue samples from mice was tested with flow cytometry.The percentages of PD-1+CD8+,TIM-3+CD8+,and PD-1+TIM-3+CD8+T cells was accessed by flow cytometry.The levels of the cytokines including tumor necrosis factor alpha(TNF-α),interferon-γ(IFN-γ),interleukin(IL)-6,and IL-10 in tumor tissues were gauged with enzyme-linked immunosorbent assay kits.RESULTS We confirmed that PD-1 and TIM-3 expression was substantially upregulated in CD4+and CD8+T cells isolated from tumor tissues and ascites of HCC patients.TIM-3 mAb and PD-1 mAb treatment both reduced tumor volume and weight,while combined blockade had more substantial anti-tumor effects than individual treatment.Then we showed that combined therapy increased T cell infiltration into tumor tissues,and downregulated PD-1 and TIM-3 expression on CD8+T cells in tumor tissues.Moreover,combined treatment facilitated the production of T cell effector cytokines TNF-α and IFN-γ,and reduced the production of immunosuppressive cytokines IL-10 and IL-6 in tumor tissues.Thus,we implicated that combined blockade could ameliorate T cell exhaustion in HCC mouse model.CONCLUSION Combined TIM-3 and PD-1 blockade restrains HCC development by facilitating CD4+ and CD8+T cell-mediated antitumor immune responses. 展开更多
关键词 Hepatocellular carcinoma T cell immunoglobulin and mucin domain-containing protein 3 Programmed cell death protein 1 CD4+T cells CD8+T cells
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System analysis based on the T cell exhaustion‑related genes identifies CD38 as a novel therapy target for ovarian cancer
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作者 TIANMING SHI RONGRONG YAN MI HAN 《Oncology Research》 SCIE 2023年第4期591-604,共14页
Ovarian cancer(OV)is highly heterogeneous tumor with a very poor prognosis.Studies increasingly show that T cell exhaustion is prognostically relevant in OV.The aim of this study was to dissect the heterogeneity of T ... Ovarian cancer(OV)is highly heterogeneous tumor with a very poor prognosis.Studies increasingly show that T cell exhaustion is prognostically relevant in OV.The aim of this study was to dissect the heterogeneity of T cell subclusters in OV through single cell transcriptomic analysis.The single RNA-sequencing(scRNA-seq)data of five OV patients were analyzed,and six major cell clusters were identified after threshold screening.Further clustering of T cell-associated clusters revealed four subtypes.Pathways related to oxidative phosphorylation,G2M checkpoint,JAK-STAT and MAPK signaling were significantly activated,while the p53 pathway was inhibited in the CD8+exhausted T cells.The standard marker genes of CD8+T cell exhaustion were screened to develop a T-cell related gene score(TRS)based on random forest plots in TCGA cohort.The patients with low TRS have better prognosis compared to the patients with high TRS in both TCGA and GEO.In addition,most genes included in the TRS showed significant differences in expression levels between the high-and low-risk groups.Immune cell infiltration was analyzed using the MCPcounter and xCell algorithms,which revealed significant differences between the two risk groups,indicating that the different prognoses may stem from the respective immune landscapes.In addition,CD38 knockdown in OV cell lines increased apoptosis and inhibited invasion in vitro.Finally,we performed a drug sensitivity analysis and identified six potential drug candidates for OV.To summarize,we identified the heterogeneity and clinical significance of T cell exhaustion in OV and built a superior prognostic model based on T cell exhaustion genes,which can contribute to the development of more precise and effective therapies. 展开更多
关键词 CD8+T exhausted Ovarian cancer Prognostic model Single cell sequencing
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白细胞介素8在骨再生中的作用及机制 被引量:1
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作者 罗鹏 王溢 +4 位作者 王安素 党祎 马亚萍 张怡 王信 《中国组织工程研究》 CAS 北大核心 2024年第24期3910-3914,共5页
背景:白细胞介素8是一种重要的细胞因子,研究发现它在骨再生过程中可通过多途径发挥着重要的作用。目的:综合叙述白细胞介素8对骨再生影响的作用机制,为接下来白细胞介素8的研究提供思路。方法:通过检索中国知网数据库(1999年1月至2023... 背景:白细胞介素8是一种重要的细胞因子,研究发现它在骨再生过程中可通过多途径发挥着重要的作用。目的:综合叙述白细胞介素8对骨再生影响的作用机制,为接下来白细胞介素8的研究提供思路。方法:通过检索中国知网数据库(1999年1月至2023年2月)及PubMed数据库(1985年1月至2023年2月)中关于报道白细胞介素8在骨相关细胞及血管化中作用的相关文献,中文检索词为“白细胞介素8,骨修复,骨代谢,间充质干细胞,成骨细胞,破骨细胞,血管化”,英文检索词为“interleukin-8”or“bone repair”or“bone metabolism”or“mesenchymal stem cells”or“osteoblasts”or“osteoclasts”or“vascularization”,初检得到中英文文献508篇,按纳入排除标准共纳入51篇文章进行综述分析。结果与结论:据现有研究显示白细胞介素8能够通过多途径促进骨细胞再生助力骨愈合,其主要分为3个方面:①促进骨细胞及间充质干细胞、成骨细胞等的增殖和分化、促使细胞朝着促进骨愈合的方向发展;②白细胞介素8能够促进血管生成,为骨组织提供充足的营养和氧气,从而进一步提高骨愈合的质量和稳定性;③白细胞介素8有利于缺氧诱导因子1α、血管内皮生长因子、基质金属蛋白酶等的表达,可营造利于骨再生的微环境,从而促进骨组织的再生和修复。综上所述,白细胞介素8在骨愈合中发挥着重要的作用,它能够促进骨细胞增殖和分化、促进血管生成和提高骨再生的机械性能,也能通过破骨细胞、间充质干细胞等作用点影响骨代谢。 展开更多
关键词 白细胞介素8 间充质干细胞 破骨细胞 成骨细胞 血管化
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Peripheral CD4^(+)CD8^(+) double positive T cells:A potential marker to evaluate renal impairment susceptibility during systemic lupus erythematosus
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作者 Kai Chang Wanlin Na +4 位作者 Chenxia Liu Hongxuan Xu Yuan Liu Yanyan Wang Zhongyong Jiang 《The Journal of Biomedical Research》 CAS CSCD 2023年第1期59-68,共10页
Lupus nephritis(LN) has a high incidence in systemic lupus erythematosus(SLE) patients, but there is a lack of sensitive predictive markers. The purpose of the study was to investigate the association between the CD4^... Lupus nephritis(LN) has a high incidence in systemic lupus erythematosus(SLE) patients, but there is a lack of sensitive predictive markers. The purpose of the study was to investigate the association between the CD4^(+)CD8^(+)double positive T(DPT) lymphocytes and LN. The study included patients with SLE without renal impairment(SLE-NRI), LN, nephritic syndrome(NS), or nephritis. Peripheral blood lymphocyte subsets were analyzed by flow cytometry. Biochemical measurements were performed with peripheral blood in accordance with the recommendations proposed by the National Center for Clinical Laboratories. The proportions of DPT cells in the LN group were significantly higher than that in the SLE-NRI group(t=4.012, P<0.001), NS group(t=3.240,P=0.001), and nephritis group(t=2.57, P=0.011). In the LN group, the risk of renal impairment increased significantly in a DPT cells proportion-dependent manner. The risk of LN was 5.136 times(95% confidence interval, 2.115–12.473) higher in cases with a high proportion of DPT cells than those whose proportion of DPT cells within the normal range. These findings indicated that the proportion of DPT cells could be a potential marker to evaluate LN susceptibility, and the interference of NS and nephritis could be effectively excluded when assessing the risk of renal impairment during SLE with DPT cell proportion. 展开更多
关键词 CD4^(+)CD8^(+)double positive T cells lupus nephritis SUSCEPTIBILITY systemic lupus erythematosus
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