程序性死亡受体1/程序性死亡配体1信号各组分在急性冠脉综合征患者外周血中的表达及意义

目的 探讨程序性死亡受体1/程序性死亡配体1信号各组分在急性冠脉综合征(ACS)患者外周血中的表达及意义.方法 采用流式细胞术检测CD4+ CD28-T细胞表面程序性死亡受体1(PD-1)以及单核细胞表面程序性死亡配体1(PD-L1)的表达;采用酶联免疫吸附实验(ELISA)检测外周血中可溶性程序性死亡受体1(sPD-1),可溶性程序性死亡配体1(sPD-L1)和干扰素-γ(IFN-γ)的浓度.结果 与稳定性心绞痛(SA)和正常对照组(HC)相比,ACS患者CD4+ CD28-T细胞表面PD-1和单核细胞表面PD-L1的表达明显上调(P＜0.05),外周血中sPD-1、sPD-L1和IFN-γ的水平显著升高(P＜0.05).其中,sPD-L1和IFN-γ的水平呈显著正相关(r=0.772,P＜0.05).sPD-1和IFN-γ的水平无相关性(r =0.306,P＜0.05).结论 ACS患者体内CD4+ CD28-T细胞过量产生的IFN-γ是单核细胞表面PD-L1表达上调和外周血sPD-L1水平升高的原因之一,为进一步研究CD4+ CD28-T细胞的增殖活化和防治ACS提供理论依据.     

PD-1/PD-L1在复发性流产患者外周血T淋巴细胞中的表达及意义

目的:探究程序性死亡因子1(PD-1)/程序性死亡因子配体1(PD-L1)在复发性流产患者外周血T淋巴细胞中的表达及意义。方法:选取2015年7月至2017年2月本院收治的复发性流产患者57例为观察组,另选取42例正常妊娠妇女为对照组,采用流式细胞仪检测两组PD-1/PD-L1在外周血T淋巴细胞表达水平。并对患者实施淋巴细胞免疫治疗,检测治疗过程中PD-1/PD-L1水平变化情况及妊娠结局。结果:观察组CD3⁺、CD8⁺显著低于对照组,CD4⁺、CD4⁺/CD8⁺显著高于对照组(P<0.05);观察组PD-1/CD4⁺、PD-1/CD8⁺、PD-L1/CD4⁺、PD-L1/CD8⁺显著低于对照组(P<0.05);患者治疗后4周、治疗后8周PD-1/CD4⁺、PD-1/CD8⁺、PD-L1/CD4⁺、PD-L1/CD...     

急性HIV感染者外周血T淋巴细胞CD57抗原动态表达及临床意义分析

目的 研究CD57在HIV急性感染者外周血T淋巴细胞的动态表达情况及临床意义.方法 随机选取2006年11月-2009年12月期间确诊为HIV-1急性感染的17位患者为研究对象,15例健康体检者为对照组,收集HIV感染者1、3、6个月时间点及对照组外周血单个核细胞(PBMC),以流式细胞仪双色、三色分析法分别分析CD3+ CD57+T淋巴细胞、CD3+ CD4+ CD57+T淋巴细胞、CD3+CD8+CD57+T淋巴细胞的比例,并分析其与病毒载量、CD4+T细胞计数间的相关性.结果 在感染1、3、6个月外周血淋巴细胞中,CD57+T淋巴细胞比例分别为15.24％±1.49％、13.51％±2.45％及14.65％ ±1.83％,正常对照组CD57+T淋巴细胞比例为3.72％±0.56％,HIV感染1、3、6个月CD57+T淋巴细胞比例较正常对照组明显增高,差异有统计学意义(P均＜0.0001).在感染的1个月、3个月外周血中CD8+CD57+在淋巴细胞中的比例分别为7.79％ +2.10％、9.88％±2.36％,与对应时间点的病毒载量成正相关关系,R2分别为0.3700、0.3768,P值分别为0.0096、0.0088;与对应时间点CD4+T细胞计数成负相关关系,R2分别为0.3768、0.4235,P值分别为0.0215、0.0017.急性HIV感染1个月时间点,6例病情快速进展患者与11例病情非快速进展患者,CD8+ CD57+T细胞比例分别为11.20％±2.21％、6.16％±1.09％,CD4+ CD57+T淋巴细胞比例分别为2.79％ ±0.31％、1.40％±0.30％,病情快速进展患者CD8+CD57+T、CD4+CD57+T淋巴细胞比例均高于病情非快速进展组,P值分别为0.0338、0.0106.结论 HIV感染急性期CD57+T淋巴细胞比例增加,其中CD8+ CD57+T淋巴细胞百分比可反映HIV病毒载量变化及CD4+T淋巴细胞的计数情况,HIV急性感染早期CD57在淋巴细胞高表达提示病情进展迅速.     

系统性红斑狼疮患者外周血CD4+和CD8+T细胞PD-1的表达和意义

目的 探讨程序性死亡分子1 (PD-1)在系统性红斑狼疮(SLE)患者外周血CD4+和CD8+T细胞上的表达及临床意义.方法 应用流式细胞仪检测51例SLE患者和38例健康对照者外周血T细胞亚群表面PD-1表达水平,比较SLE稳定组、活动组和健康对照组以及狼疮肾炎组和无狼疮肾炎组之间CD4+和CD8+T细胞表面PD-1表达的百分比,并分析其与临床表现及实验室检查数据的相关性.结果 SLE活动组CD4+T细胞PD-1表达水平高于健康对照组和不活动组,差异均有统计学意义(P＜0.05).SLE活动组、稳定组CD8+T细胞PD-1表达水平均高于健康对照组,差异有统计学意义(P＜0.05).狼疮肾炎患者CD4+PD-1+和CD8+PD-1+T细胞分别高于无狼疮肾炎患者(P＜0.01).SLE患者中抗dsDNA抗体、抗Sm抗体、抗核小体抗体阳性组外周血CD4+和CD8+T细胞PD-1表达水平均高于对应阴性组.SLE患者CD4+和CD8+T细胞PD-1表达百分率与SLE疾病活动度指数(SLEDAI)、尿蛋白定量呈正相关,与补体C3呈负相关.结论 SLE患者外周血CD4+和CD8+T细胞PD-1表达异常,与SLEDA1和自身抗体产生有明确的相关性.     

PD-1受体在HBV—ACLF患者外周血CD8^＋T细胞上的表达研究

目的探讨乙型肝炎病毒所致慢加急性肝衰竭（HBV—ACLF）患者外周血中CD8^＋T细胞上PD-1（Programmed death-1）的表达以及对CD8^＋T细胞的影响。方法收集60例HBV—ACLF患者外周血;应用流式细胞仪检测外周血中CD8^＋淋巴细胞上的PD-1、CD95、穿孔素、颗粒酶A、颗粒酶B、CD107a的表达以及CD14细胞上PD—L1的表达;根据不同病情分期和不同预后比较各分子的表达差异;设15名肝硬化患者及15名健康人为对照组。结果（1）HBV-ACLF患者CD8^＋T细胞上PD-1较肝硬化组和健康组表达上调（P〈0．05）;好转组PD-1表达率低于无效组（P〈0．05）;早、中、晚三期PD-1表达率呈上升趋势（P〈0．05）;（2）PD—L1在好转组及病情早期表达相对最低;（3）PD-1与CD95在死亡组表达明显升高;穿孔素、颗粒酶及CD107a在死亡组表达升高,但PD-1在这三类细胞上表达率非常低。结论PD-1在HBV．ACLF患者外周血CD8^＋T细胞上表达上调,且与病情严重程度呈正比。其上调表达可能促进总CD8^＋T细胞的凋亡,但对于具有杀伤活性的CD8^＋T细胞抑制作用相对较弱。     

NK相关抗原在HIV/AIDS患者CD8+T淋巴细胞上的表达

目的　探讨NK相关抗原CD5 6、CD16在HIV AIDS患者CD8 T淋巴细胞上的表达。方法　取外周血细胞 ,用标记荧光的抗体进行染色 ,以CD8强阳 淋巴细胞为门 ,用流式细胞仪分析CD8 T淋巴细胞上CD5 6、CD16的表达。结果　HIV AIDS患者CD8 T淋巴细胞表达CD5 6 、CD5 6 CD16 - 、CD5 6 CD16 均明显低于HIV抗体阴性健康对照组 (P <0 .0 5 ) ;经高效抗逆转录病毒疗法 (HAART)治疗后CD8 T淋巴细胞表达的CD5 6 、CD5 6 CD16 - 、CD5 6 CD16 呈逐渐升高趋势。HIV AIDS患者表达CD5 6 CD16 - 的CD8 T淋巴细胞亚群绝对数与CD4 T淋巴细胞绝对数呈正相关 ,r=0 .393,P <0 .0 5 ;表达CD5 6 - CD16 的CD8 T淋巴细胞百分数与CD4 T细胞绝对数呈负相关 ,r=- 0 .32 4 ,P <0 .0 5。结论　表达CD5 6的CD8 T淋巴细胞在HIV AIDS患者中明显缺失 ,HAART治疗可恢复缺失。CD8 T淋巴细胞上CD5 6的表达是HIV感染中值得关注的重要指标之一 ,对评价抗病毒疗效具有指导意义。     

PD-1及其配体在原发性干燥综合征患者唇腺中的表达及临床意义

目的:观察干燥综合征(Sjogren's syndrome,SS)患者唇腺活检组织中程序性死亡分子-1(programmed death-1,PD-1)、程序性死亡配体-1(programmed death ligand-1,PD-L1)、程序性死亡配体-2(programmed death ligand-2,PD-L2)的表达,以及其与临床病理特征的相关性.方法:对所有患者和正常对照组的唇腺活检标本进行HE染色观察淋巴细胞浸润程度,免疫组织化学观察PD-1,PD-L1和PD-L2的表达.结果:SS患者唇腺活检组织中PD-1,PD-L1和PD-L2的表达较正常对照组明显增强.SS患者唇腺活检标本淋巴细胞的浸润程度与PD-1和PD-L2的表达强度无明显相关性,与PD-L1的表达强度呈正相关.SS患者疾病活动度评分与PD-1,PD-L1及PD-L2的表达强度均无明显相关性.SS患者疾病损害评分与PD-1的表达强度无明显相关性,与PD-L1和PD-L2的表达强度呈负相关.结论:PD-1,PD-L1及PD-L2在SS患者唇腺活检组织中的表达明显增强,PD-1/PD-L信号通路可能在SS的免疫病理损害中起重要作用.     

新型IFN-α/anti-PD-L1融合蛋白通过活化肿瘤特异性CD8~+T淋巴细胞促进抗肿瘤疗效

共抑制和共刺激通路对T淋巴细胞活化都是至关重要的,调节这些通路的抗体都是十分有前景的肿瘤治疗候选物。虽然阻断PD-L1、PD-1和CTLA-4的抗体在一些肿瘤患者中取得了良好的效果,但仍有约70%的患者对这些治疗反应不佳。许多内在机制,特别是低肿瘤突变负荷和有限数量的肿瘤浸润淋巴细胞是造成该耐药性的主要原因。为克服这些因素,课题组设计了新型IFN-α/anti-PD-L1融合蛋白,其可以同时增加肿瘤浸润淋巴细胞数量并阻断PD-1-PD-L1免疫抑制通路。IFN-α/anti-PD-L1融合蛋白在体内外均显示出活化T淋巴细胞能力,这有助于后者提高有效的体内抗肿瘤活性。综上,课题组视IFN-α/anti-PD-L1融合蛋白应用于临床为肿瘤免疫治疗新策略。     

系统性红斑狼疮患者外周血 CD19+ CD25+ Breg比例和细胞表面PD-1和PD-L1的表达及其与临床指标的相关性

目的 研究程序性死亡蛋白1(PD-1)与其配体PD-L1在系统性红斑狼疮(SLE)患者外周血CD19⁺CD25⁺调节性B细胞(Breg)的表达及临床意义。方法 收集50例SLE患者和41例健康人(HC)外周血标本,采用流式细胞仪检测外周血中CD19⁺CD25⁺ Breg的比例,以及CD19⁺CD25⁺Breg的PD-1、 PD-L1表达,同时采集患者的临床表现和实验室指标等临床信息。使用免疫磁珠分选CD4⁺ T细胞与CD19⁺ B细胞,体外细胞共培养,检测Breg的分化。结果 SLE患者活动组外周血中CD19⁺CD25⁺Breg比例低于HC,CD25⁺B细胞PD-1、 PD-L1的表达高于HC; SLE患者有胸腔积液、关节炎、 C反应蛋白(CRP)上升的患者Breg频率高于对应阴性组;SLE患者有IgM下降、抗核糖核蛋白(RNP)抗体阳性的患者Br...     

宫颈癌患者外周血中CD4+CD25+Foxp3+调节性T淋巴细胞及血清中IL-10、TGF-β的表达及其临床意义

目的 探讨宫颈癌患者外周血CD4+ CD25+ Foxp3+调节性T淋巴细胞(regulatory T cells,Treg)、T淋巴细胞亚群以及血清IL-10、TGF-β1、TGF-β2细胞因子的表达及其临床意义.方法 选取32例宫颈癌患者和24位健康体检者为研究对象,采用流式细胞术检测受试者外周血中CD4+ CD25+ Foxp3+ Treg占CD4+T淋巴细胞的比例、T淋巴细胞亚群细胞比例;采用ELISA方法检测血清中细胞因子IL-10、TGF-β1、TGF-β2的含量.结果 与健康对照组相比,宫颈癌组外周血中CD4+CD25+ Foxp3+ Treg占CD4+T淋巴细胞的比值明显增高,差异有统计学意义(P＜0.01),T淋巴细胞亚群(CD3+、CD4+、CD8+、CD4 +/CD8+、CD19+)比例差异无统计学意义(P＞0.05),血清IL-10含量明显增高,TGF-β2含量明显降低,差异有统计学意义(P＜0.01),TGF-β1的含量差异无统计学意义(P＞0.05);宫颈癌组手术后、化疗后CD4+ CD25+ Foxp3+ Treg占CD4+T淋巴细胞的比例,血清IL-10、TGF-β1、TGF-β2含量均明显降低,差异有统计学意义(P＜0.01),CD4+ CD25+ Foxp3+Treg与TGF-β1之间存在正相关(r=0.673,P＜0.01).结论宫颈癌患者CD4+ CD25+ Foxp3+ Treg占CD4+T淋巴细胞的比值增高,且与TGF-B1含量呈正相关,可能在宫颈癌的肿瘤发生发展及肿瘤免疫逃逸中起着重要作用.     

Immunohistochemical localization of programmed death-1 ligand-1 (PD-L1) in gastric carcinoma and its clinical significance

The present study examined programmed death-1 ligand-1 (PD-L1) detected by immunohistochemical labeling in 102 cases of human gastric carcinoma, 10 adenoma and 10 normal tissues. The relationship between PD-L1 immunolocalization and clinical pathological features, as well as the prognosis of gastric carcinoma, was explored. There was no PD-L1 detectable in normal gastric tissues and very weak immunolabeling in gastric adenomas, but it could be detected in 42.2% of gastric carcinoma tissues. There was no correlation between PD-L1 immunolocalization and patient age, sex, tumor location or the degree of tumor differentiation in the gastric carcinomas. However, PD-L1 immunodetection was significantly correlated to tumor size, invasion, lymph node metastasis and survival time of patients. PD-L1 immunolabeling was significantly enhanced (P<0.01) when the tumor infiltrated into the deep muscular layers, with lymph node metastasis or survival time of less than 2 years, Moreover, multivariate analysis demonstrated that PD-L1 immunodetection could be used as an independent factor to evaluate the prognosis of gastric carcinoma.     

癌灶CD4~+CD25~+和CD8~+ T细胞亚群与卵巢浆液性癌患者生存期相关

检测卵巢浆液性癌患者癌组织中CD4+CD25+及CD8+T细胞的数目,探讨其两种T细胞介导的免疫功能对疾病发展及预后的影响。免疫组织化学双标及单标的染色方法检测41例卵巢浆液性癌患者手术切除癌组织标本中CD4+CD25+和CD8+T细胞的数目。结果显示,癌灶中CD4+CD25+T淋巴细胞为(19.95±11.50)个/10HPF,CD8+T淋巴细胞为(43.46±16.69)个/10HPF。生存分析发现高CD4+CD25+T细胞组患者总生存期较低CD4+CD25+T细胞组缩短,差异有显著性(P<0.05);而高CD8+T细胞组患者总生存期与低CD8+T细胞组相比延长,且差异有显著性(P<0.05),此外两种T细胞数目与患者年龄、病理分级、临床分期、腹水细胞学及淋巴结转移等临床病理因素均无关(P>0.05)。结果表明,卵巢浆液性癌中高CD4+CD25+T细胞提示患者预后不良,可能与CD4+CD25+T细胞介导的免疫抑制导致肿瘤免疫逃逸有关;癌组织中高CD8+T细胞提示患者预后较好,两种T细胞对卵巢浆液性癌预后的评估有重要的价值,同时可以通过阻断CD4+CD25+T细胞的免疫抑制作用改善卵巢浆液性癌患者的预后,为卵巢癌治疗提供靶目标。     

Circulating CD4+CD8+ T lymphocytes in patients with Kawasaki disease

We serially monitored cell surface antigen expression on mononuclear cells in peripheral blood isolated from patients with Kawasaki disease (KD), and found, for the first time, that a markedly increased number of CD4⁺CD8⁺ T lymphocytes was present in some of the patients (11 of the 24 cases). The cases of five of these 11 patients were complicated with coronary artery lesion (CAL); the 13 patients with normal numbers of CD4⁺CD8⁺ T lymphocytes did not have CAL. The patients' age, sex and grade of systemic inflammation evaluated by peripheral leucocyte count and serum C-reactive protein levels were not correlated to the number of CD4⁺CD8⁺ T lymphocytes. Other cell surface antigen characteristics of the CD4⁺CD8⁺ T lymphocytes included CD3⁺, CD45RA⁺, CD45RO⁺, CD16^?, and HLA-DR⁺. These results indicate that the surface antigen characteristics of the KD peripheral blood examined were the same as those of Epstein–Barr virus infection without CD45RA⁺. These findings provide useful information for the analysis of the pathogenesis of KD.     

Lower percentage of CD8+ T cells in peripheral blood of patients with sporotrichosis

PurposeTo characterize the peripheral immunity and immunity response of patients with sporotrichosis, in this study we determined the lymphocyte subsets in the peripheral blood of Chinese patients with sporotrichosis.MethodsIn this retrospective study, peripheral blood was collected from 69 sporotrichosis patients (37, fixed cutaneous form; 32 lymphocutaneous) and 66 healthy controls. Lymphocyte subsets were analyzed using flow cytometry.ResultsCompared to controls, the percentage of CD8+ T cells was lower in sporotrichosis patients. The percentage of CD8+ T cells in peripheral blood tended to become lower with disease duration and disease severity, although the difference was not statistically significant for either acute, subacute and chronic patients or fixed cutaneous and lymphocutaneous patients.ConclusionOur data indicate that the decrease of CD8+ T cells in peripheral blood of patients with sporotrichosis is associated with disease severity, although the difference was not statistically significant for either duration or clinical forms of the disease. Combining antifungal agents and immunomodulators in patients with long disease duration and lymphocutaneous may be more beneficial than antifungal monotherapy.     

Non-antigen specific CD8+ T suppressor lymphocytes

Abstract. The homeostasis of peripheral immune system function is maintained by the activity of regulatory lymphocytes. Among these cells, a subset of CD8+CD28- T suppressor lymphocytes has recently been characterized for the capacity to mediate their effects without antigen restriction. These non-antigen-specific CD8+ T suppressor lymphocytes originate from circulating CD8+CD28- T lymphocytes after stimulation with interleukin-2 and interleukin- 10. CD8+ suppressor cells inhibit both antigen-specific CD4+ T cell proliferation and cellular cytoxicity through secretion of cytokines such as interferon-, interleukin-6, and interleukin-10. The function of CD8+ suppressor cells is impaired in patients with systemic lupus erythematosus in relapse as well as in patients with systemic sclerosis with disease progression, suggesting the involvement of CD8+ suppressor cells in the pathogenesis of autoimmune diseases. Interestingly, CD8+ suppressor cells have been found among tumor-infiltrating lymphocytes, which could be related to tumor-induced-immunosuppression. Failure to generate CD8+ suppressor cells from the peripheral blood is frequently observed in HIV-infected patients. It remains to be clarified whether this phenomenon is due to depletion and/or functional impairment of this cell subset or to their compartmentalization in peripheral tissues and immunocompetent organs where they could contribute to the induction of immunodeficiency.     

RA患者外周血CD8＋CD28-和CD4＋CD25＋调节性T细胞的表达及疾病活动性指标相关性分析

目的：检测类风湿性关节炎（RA）患者外周血CD8＋CD28-、CD4＋CD25＋调节性T细胞亚群,探讨其与临床活动性指标的关系。方法：采用流式细胞术检测台州医院RA患者外周血CD8＋CD28-、CD4＋CD25＋ T细胞亚群比例,探讨调节性T细胞与RA活动性、类风湿因子（RF）、免疫球蛋白（Ig）、C反应蛋白（CRP）、补体C3、抗CCP抗体、抗核抗体（ANA）、血小板（PLT）及血沉（ESR）的关系。结果：活动期RA患者外周血CD4＋CD25＋调节性T细胞亚群比例显著低于正常对照组（P〈0.01）,但稳定期RA患者与正常对照组结果差异无统计学意义（P〉0.05）。活动期和稳定期RA患者CD8＋CD28-与正常对照组相比较,结果无统计学意义（P〉0.05）;CD4＋CD25＋与CRP密切相关（r=-0.593,P〈0.05）,CD8＋CD28-与ESR相关系数呈弱相关。CD4＋CD25＋和CD8＋CD28-细胞与RF、IGG、C3、ANA、anti-CCP和PLT未见明显相关性。结论：活动期RA患者外周血CD4＋CD25＋ T细胞亚群比例减少,CD4＋CD25＋ T细胞可能与类风湿性关节炎疾病进展有关。     

TIGIT and PD-1 may serve as potential prognostic biomarkers for gastric cancer

Gastric Cancer (GC) is the fifth leading cause of cancer-related death in the world, and in urgent need of specific therapeutic targets to acquire prominent effectiveness. T-cell immunoglobulin and immunoreceptor tyrosine–based inhibitory motif (ITIM) domain (TIGIT) and programmed cell death protein 1 (PD-1) are identified to be abnormally overexpressed in various types of cancers including GC. This study aimed to investigate whether TIGIT and PD-1 could serve as potential prognostic biomarkers for GC. Firstly, TCGA GC dataset analysis and correlation analysis were utilized to inspect the relationship between expression of TIGIT, PD-1 and CD8 + T cells in GC and adjacent normal tissues. Then, flow cytometry was used to verify the data after collecting the peripheral blood, GC and adjacent normal tissues from 150 GC patients. Lastly, quantitative RT-PCR was performed to detect the expression of CD155, CD113, CD112 and TIGIT in six human GC cell lines and 631 GC patients in KM Plotter Database to conduct prognostic analysis. As results, we found that TIGIT and PD-1 were upregulated in GC tissues with high CD8 + T cells infiltration, while correlation analysis indicated they were in high-positive correlation. In addition, the flow cytometry analysis further showed that the high-expression of TIGIT in tumor microenvironment of GC could suppress the function of infiltrative CD8 + T cells, which leads to the escape of GC cells from immune killing. Furthermore, CD155 and CD112 were found abnormally upregulated in GC tissues and cell lines and the high expression of CD155, CD112 and TIGIT demonstrated poor prognosis results. In conclusion, these results provided potential therapeutic targets and prognostic biomarkers for treatment of GC in clinic.     

Programmed death-1 upregulation is correlated with dysfunction of tumor-infiltrating CD8+ T lymphocytes in human non-small cell lung cancer

T-cell tolerance is an important mechanism for tumor escape, but the molecular pathways involved in T-cell tolerance remain poorly understood. It remains unknown whether the inhibitory immunoreceptor programmed death-1 (PD-1) plays a role in conditions of human non-small cell lung cancer (NSCLC). In this study, we detected PD-1 expression on CD8⁺ T cells from healthy control peripheral blood mononuclear cells (PBMCs) and the PBMCs of NSCLC patients as well as NSCLC tissues. Results showed that tumor-infiltrating CD8⁺ T cells had increased PD-1 expression and impaired immune function, including reducing cytokine production capability and impairing capacity to proliferate. Blockade of the PD-1/PD-L1 pathway by the PD-L1-specific antibody partially restored cytokine production and cell proliferation. These data provide direct evidence that the PD-1/PD-L1 pathway is involved in CD8⁺ T-cell dysfunction in NSCLC patients. Moreover, blocking this pathway provides a potential therapy target in lung cancer.