HIV／AIDS患者血浆病毒载量及外周血T淋巴细胞亚群的变化

目的：观察国内HIV／AIDS患者血浆病毒载量和外周血CD4^ 、CD8^ T淋巴细胞的变化，探讨这些变化的临床意义。方法：选择未经抗病毒治疗的HIV／AIDS患者124例，用bDNA法检测血浆病毒载量，并用流式细胞仪检测外周血CD4^ 、CD8^ T淋巴细胞。结果：AIDS患者的血浆病毒载量明显高于HIV感染者，血浆病毒载量与CD4^ 细胞计数呈显著负相关，但其最高峰位于CD4^ 细胞计数100／μl处，然后随着CD4^ 细胞计数的下降而减少。CD4^ T细胞计数为AIDS组＜HIV组＜正常对照组：HIV感染者的CD8^ T细胞计数显著高于正常组和AIDS组，而AIDS患者CD8^ T细胞数则随着CD4^ T细胞减少而下降。结论：血浆病毒载量随着疾病进展而显著升高，但在疾病晚期则有所降低。外周血CD4^ T细胞计数随着疾病的进展而进行性减少；CD8^ T细胞计数在感染早期显著升高，进入晚期则减少。在评价HIV感染者和AIDS患者病情时，应结合病毒载量、CD4^ 、CD8^ T细胞计数综合分析。     

T淋巴细胞激活亚群在HIV感染中的变化及其临床意义

目的：研究HIV／AIDS患者T淋巴细胞激活亚群的变化，探讨其临床意义。方法：用流式细胞仪检测59例HIV／AIDS患者和51例健康献血员的T淋巴细胞，对其中40例患者的所有健康献血员进一步分析T淋巴细胞激活亚群（HLA－DR^ CD4^ 、HLA-DR^ CD8^ 和CD38^ CD8^ ）；用bDNA病毒定量检测仪检测59例HIV／AIDS患者的血浆HIV病毒载量。结果：与正常人组相比，HIV组和AIDS组的T淋巴细胞各激活亚群的百分比均显著升高，所有激活亚群均与T4细胞计数成反比，而与病毒载量成正比。其中，CD38^ CD8^ 亚群的百分比与T4细胞计数和病毒载量的相关性最为密切，相关系数分别为r=-0.603和r=0.523，（P＜0．01）。结论；HIV／AIDS患者的T淋巴细胞发生持续和异常的免疫激活，细胞激活程度与疾病进展高度相关，测定这些激活的T细胞亚群变化不仅有助于评价HIV／AIDS患者的免疫状况、判断病毒复制的活跃程度，而且对预示疾病进展和临床疗效评价方面均具有重要价值。     

正常T细胞分泌激活因子基因多态性与HIV-1感染者病毒载量、CD+4细胞计数和CD+4/CD+8比值的关系

目的分析正常T细胞分泌激活因子(RANTES)启动子和内含子等位基因,对艾滋病病毒1型(HIV-1)感染者外周血CD+4细胞计数、CD+4/CD+8比值和病毒载量的关系,以期探讨RANTES单核苷酸多态性(SNP)和艾滋病(AIDS)发病的关系.方法用流式细胞仪和real time法对40例汉族HIV-1感染者测定外周血CD+4、CD+8细胞计数和病毒载量,应用PCR-RFLP法进行基因分型.结果对RANTES-403、-28和In1.1三个位点等位基因与外周血CD+4T淋巴细胞计数、CD+4/CD+8+比值和病毒载量的关系的分析表明,具有RANTESIn1.1 C/C和T/C基因型的感染者,与较高的病毒载量、较低的C+4T细胞计数和C+4/CD+8比值有关.In1.1 T/T与T/C、C/C基因型的log10病毒载量的差异有非常显著的统计学意义(P＜0.01),但是不同基因型之间CD+4T淋巴细胞计数和CD+4/CD+8细胞比值则无显著性差异.log10病毒载量和CD+4T淋巴细胞计数(r=-0.447,P＜0.01)、CD+4/CD+8比值(r=-0.369,P＜0.05)有显著的负相关关系.结论所研究人群中,具有RANTES In1.1C的基因型者,与较高的病毒载量、较低的CD+4T细胞计数和CD+4/CD8+比值有关,它们是反映AIDS进程的主要指标,可能加速AIDS发病进程;而RANTES-403和-28等位基因的影响则处于相对次要的作用.     

人类免疫缺陷病毒感染者及艾滋病患者CD8+ CD38+ CD8+ HLA-DR+比IV载量的相关性研究

目的 研究人类免疫缺陷病毒(HIV)感染者和获得性免疫缺陷综合征(AIDS,艾滋病)患者CD8+ T细胞激活分子CD38、人类白细胞Ⅱ类抗原(HLA-DR)与血浆HIV载量的相关性,分析用CD8+ CD38+、CD8+ HLA-DR+的比例替代HIV载量的可行性.方法 采集1998-2006年期间在北京协和医院初诊的HIV感染者或AIDS患者236例和56名同期健康献血员的抗凝静脉血,用流式细胞术分析CD8+ T细胞分别表达CD38和HLA-DR的比例,用分支DNA技术(bDNA)检测血浆病毒载量(VL).用受试者工作特征曲线(ROC)分别预测VL＞1×103拷贝/mL、＞1×104拷贝/mL和＞1×105拷贝/mL时CD8+ CD38+、CD8+ HLA-DR+比例的临界值范围.结果 236例患者的CD4+ T细胞计数138(16,262)×106/L,显著低于对照组(P＜0.01);CD8+ T细胞计数618(353,879),显著高于对照组(P＜0.05);CD8+ CD38+、CD8+ HLA-DR+的比例分别为85.4%(72.5%,92.2%)和40.3%(17.5%,59.7%),显著高于对照组(P＜0.01),与HIV载量的相关性分别为0.429(P＜0.01)和0.282(P＜0.01).用CD8+ CD38+＞80.4%预测VL＞1×103拷贝/mL的敏感度和特异度为80.6%和75.0%;用CD8+ HLA-DR+预测VL＞1×105拷贝/mL的敏感度和特异度为78.7%和81.4%.结论 对HIV感染或AIDS初诊的患者可以尝试用CD38和HLA-DR激活亚群来预测血浆HIV载量,这种替代检测方法具有一定的可行性.     

北京市50例HIV/AIDS病人CCR5 CXCR4 HLA-DR和CD38表达与疾病进展关系

目的了解艾滋病病毒(HIV)感染者/艾滋病(AIDS)病人(HIV/AIDS病人)淋巴细胞表面CCR5、CX-CR4、HLA-DR和CD38表达,分析其与疾病进展的关系,探讨HIV感染的免疫学基础。方法收集50例HIV/AIDS病人及14例健康对照的抗凝全血,用流式细胞仪检测CCR5、CXCR4、HLA-DR和CD38表达,并分析其与疾病进展情况的相关性。结果艾滋病组、HIV感染者和正常对照CCR5/CD4,CXCR4/CD4,CD38/CD4,CCR5/CD8,CD38/CD8和HLA-Dr/CD8表达有显著性差异,CXCR4/CD4和CD38/CD4与疾病进程呈明显正相关,CCR5/CD8和CD38/CD8与疾病进程呈明显负相关。结论 HIV/AIDS病人淋巴细胞表面CCR5、CXCR4和CD38表达与疾病进展密切相关。     

HIV感染长期不进展者与艾滋病患者HIV-1 gag特异性CD+8 T细胞应答

目的探讨欧美流行的人类免疫缺陷病毒(HIV)-1 B亚型株与我国HIV感染和艾滋病(AIDS)病人 gag特异性CD+8 T细胞应答交叉反应性.方法研究对象为长期不进展者(LTNP)7例和艾滋病患者9例,将覆盖HXB2 HIV-1 gag全长的125个重叠肽段组成11个肽段库作为抗原,用γ干扰素刺激原酶联免疫斑点试验方法检测LTNP和AIDS病人的特异性CD+8 T细胞应答,观察两组病人间的差异及其与CD+4 T细胞和病毒载量的相关性.结果 LTNP组和AIDS组HIV-1 gag特异性CD+8 T细胞应答强度分别为(1212±796)斑点形成细胞数(SFC)/106外周血单个核细胞(PBMC)和(182±203) SFC/106PBMC,识别肽段库的个数(间接反应了细胞毒性T淋巴细胞应答的宽度)分别为3.0±0.8和0.8±0.7,LTNP组显著高于AIDS组.CD+8 T细胞应答的强度和宽度与CD+4 T细胞计数呈正相关,与病毒载量呈负相关.结论欧美流行株与我国病毒株之间具有交叉反应性,HIV-1 gag特异性CD+8 T细胞应答在阻止疾病进展中可能发挥重要作用.     

静脉吸毒人群HIV感染者CD+3 CD+4 CD+8 T淋巴细胞定量研究与分析

目的　定量分析静脉吸毒人群艾滋病病毒 (HIV)感染者CD+ 3 、CD+ 4 、CD+ 8T淋巴细胞水平。方法　采用流式细胞技术 (FCM) ,对 76例无症状抗 HIV阳性的静脉吸毒者 ,16 5例抗 HIV阴性的静脉吸毒者及 6 1名正常对照 ,分别检测CD+ 3 、CD+ 4 、CD+ 8T淋巴细胞绝对计数和CD+ 4 /CD+ 8比值。结果　HIV感染组与静脉吸毒组及正常对照组各项指标间差异有非常显著的统计学意义 (F =10 5 0 2、15 9 13、2 2 0 0 8,P均 <0 0 1) ;CD+ 4 细胞计数和CD+ 4 /CD+ 8比值表现为HIV感染组 <静脉吸毒组 <正常对照组 (q =18 4、2 4 6、11 1,P均 <0 0 1) ,CD+ 3 细胞计数呈现为HIV感染组 >健康对照组 >静脉吸毒组 (q=19 8、6 5、10 8,P均 <0 0 1) ,CD+ 8细胞计数表现为HIV感染组 >静脉吸毒组 >健康对照组 (q=2 7 2、2 4 9,P均 <0 0 1;q =3 4 8,P均 <0 0 5 )。结论　HIV感染和 /或静脉吸毒均可不同程度的导致CD+ 4 和CD+ 8细胞水平的改变 ,有关静脉吸毒合并HIV感染对免疫细胞水平的影响尚需进一步深入研究。     

CXCR5~+CD8~+ T细胞在HIV感染中的免疫特征及其与疾病进展关系的研究

目的探讨HIV感染者外周血CXCR5~+CD8~+T细胞的频率、功能变化及其与病情进展的相关性。方法收集40例HIV感染者和15例健康对照者,采用流式细胞分析术检测其外周血CXCR5~+CD8~+T细胞频率及IFN-γ和IL-10表达,并分析其与血浆HIV载量和外周血CD4~+T细胞计数的相关性。结果与健康对照组相比,HIV感染组外周血CXCR5~+CD8~+T细胞频率上调(P0.05),且与外周血CD4~+T细胞计数呈弱正相关(r=0.349,P=0.027),与血浆HIV载量呈弱负相关(r=-0.377,P=0.040);HIV感染者外周血CXCR5~+CD8~+T细胞IFN-γ表达与血浆HIV载量呈负相关(r=-0.514,P=0.002);而CXCR5~+CD8~+T细胞IL-10的表达在HIV感染者中明显上调(P0.05),与外周血CD4~+T细胞计数呈弱负相关(r=-0.317,P=0.046),与血浆HIV载量呈正相关(r=0.670,P=0.002)。结论 HIV感染者外周血CXCR5~+CD8~+T细胞频率功能变化与疾病进展密切相关。     

AIDS患者高效抗逆转录病毒联合治疗后外周血CD+8 CD+38T细胞与病毒载量同步变化

目的了解艾滋病(AIDS)患者高效抗逆转录病毒联合治疗(HAART)前后外周血CD+38抗原在CD+8T淋巴细胞上的表达情况.方法应用流式细胞仪采用双色荧光抗体检测技术检测CD+8 CD+38 T细胞;用罗式核酸扩增荧光定量聚合酶链反应(PCR)法检测血浆病毒载量(VL).结果 HAART后2周内CD+8 CD+38 T细胞数与VL开始同步下降,12周后83%AIDS患者的VL降至＜500拷贝/ml,同时CD+8 CD+38 T细胞计数与治疗前相比非常明显地降低(P＜0.001).而且63%的AIDS患者在血浆VL低于检测水平时,其CD+8 CD+38 T细胞数仍继续下降(与VL开始达到检测水平以下时相比,P＜0.001).结论 AIDS患者在HAART开始后,CD+8 CD+38 T细胞数与VL快速下降,在24周左右降至正常水平;并且CD+8 CD+38 T细胞数在VL达到检测不到时仍继续下降,提示在血浆VL低于检测水平时,CD+8 CD+38 T细胞数能够作为判断病毒是否复制的标记.     

慢性HBV感染者外周血CD8+T细胞中Mg~(2+)水平及其临床意义

目的检测慢性乙型肝炎病毒(HBV)感染者外周血CD8+T细胞中Mg~(2+)水平以及其表面活性抑制分子PD-1、CD95和活化分子CD38、NKG2D的表达情况,为HBV的临床治疗提供理论依据。方法选取2016年1月至2017年2月在我院肝病门诊就诊的未经抗病毒治疗的HBV感染患者62例及健康对照者30例为研究对象,根据外周血HBV DNA水平将HBV感染患者分为高病毒载量组和低病毒载量组。检测HBV感染患者及健康对照者外周血及CD8+T细胞内Mg~(2+)浓度,采用流式细胞术检测三组对象CD8+T细胞表面分子PD-1、CD95、CD38和NKG2D的表达水平。结果 HBV感染患者及健康对照者外周血Mg~(2+)浓度比较差异无统计学意义(P0.05);慢性HBV感染者CD8+T细胞中Mg~(2+)浓度显著低于健康对照者(P0.05),高病毒载量组患者CD8+T细胞中Mg~(2+)浓度显著低于低病毒载量组(P0.05)。HBV感染患者CD8+T细胞表面分子PD-1表达水平显著高于健康对照者,高病毒载量组患者PD-1的表达水平显著高于低病毒载量组(P0.05);高病毒载量组患者CD95表达水平显著高于低病毒载量组和健康对照组(P0.05),低病毒载量组与健康对照组CD95表达水平比较差异无统计学意义(P0.05);高病毒载量组患者CD38表达水平显著低于低病毒载量组和健康对照组(P0.05),低病毒载量组与健康对照组CD38表达水平比较差异无统计学意义(P0.05)。HBV感染患者NKG2D表达水平显著低于健康对照者(P0.05),高病毒载量组患者NKG2D表达水平显著低于低病毒载量组(P0.05)。结论 HBV感染者外周血CD8+T细胞内Mg~(2+)浓度下降可能与CD8+T细胞功能耗竭存在一定的关联,可能与Mg~(2+)转运体功能异常有关。     

HIV/AIDS外周血T淋巴细胞活化与病情进展的临床研究

目的 探讨HIV/AIDS外周血T淋巴细胞活化水平与病情进展的关系.方法 检测105例HIV/AIDS患者外周血可溶性CD27(sCD27)水平,CD28+CD8+、CD28+CD4+、HLA-DRCD8+和CD38+CD8+比例以及CD4+T淋巴细胞计数,并在正常体检人群中随机抽取15名健康人作为对照组.分别用流式细胞技术和ELISA方法检测和分析T细胞活化指标(CD2+CD8+、CD28+CD4+、CD38+CD8+、HLA-DRCD8+、sCD27)与疾病分期、CD4+T淋巴细胞计数的相关性.结果 HIV/AIDS的sCD27水平和HLA-DRCD8+和CD38+CD8+比例较正常人显著升高(P＜0.05),sCD27在AIDS C3期患者中明显升高,与B3期患者比较有显著性差异,CD28+CD4+、CD28+CD8+、HLA-DRCD8+和CD38+CD8+比例在CD4+T淋巴细胞计数超过200/ul的患者中显著升高(P＜0.05).结论 T淋巴细胞活化水平与AIDS病情进展密切相关,HIV/AIDS的T淋巴细胞活化水平明显升高,CD4+T淋巴细胞计数超过200/μl患者的T淋巴细胞活化水平高于CD4+T淋巴细胞计数低于200/μl的患者.     

Autoantibodies in HIV-infected Hemophilia Patients against Different Epitopes on CD4+Lymphocytes and Recombinant CD4

We studied 684 sera obtained from 20 hemophilia patients with AIDS/AIDS-related complex (ARC), 89 asymptomatic HIV+, 76 HIV- hemophilia patients and 151 healthy controls for antibodies against recombinant CD4 (rCD4). Twenty-two percent of AIDS/ARC patients, 10% of asymptomatic HIV+ patients, 17% of HIV-patients, and 1% of healthy controls had anti-rCD4 antibodies. Purified anti-rCD4 antibodies did not react with human CD4+ lymphocytes. This may explain why formation of anti-rCD4 antibodies correlated neither with the occurrence of autoantibodies against CD4+ lymphocytes nor with a decrease in CD4+ cell counts. Antibodies that were eluted from CD4+ lymphocytes after sequential adsorption and elution with separated CD8+ and CD4+ cells reacted with CD4+ lymphocytes of only some healthy individuals, suggesting diversity of CD4 expression.     

Expression of activation antigens, HLA-DR and CD38, on CD8 lymphocytes during HIV-1 infection.

OBJECTIVE: To study the expression of the activation markers human leukocyte antigen (HLA)-DR and CD38 antigen on CD8+ T-lymphocytes in HIV-infected subjects and HIV-negative controls. DESIGN: Two- and three-colour flow-cytometric analysis. METHODS: Fresh peripheral venous blood was obtained from 16 HIV-infected subjects, representing four different stages of HIV disease, and from six HIV-negative controls. Three-colour lymphocyte immunophenotyping was performed using peridinyl chlorophyll-A protein (PerCP)-conjugated anti-CD8 monoclonal antibody (MAb) in combination with anti-HLA-DR (phycoerythrin) and anti-CD38 (fluorescein isothiocyanate) MAb. RESULTS: The relative percentage of the lymphocyte populations thus defined differed between HIV-negative and HIV-positive subjects and between HIV-infected subjects at different clinical stages of disease. Simultaneous expression of HLA-DR and CD38 within the CD8 T-lymphocyte compartment increased from 8% in controls to 49% in asymptomatic HIV-infected subjects (P less than 0.005). Symptomatic patients differed from asymptomatic seropositives by a further increase in the HLA-DR+ CD38+ CD8 subset. In AIDS patients, the HLA-DR+ CD38- CD8 subset decreased (P less than 0.05) and the HLA-DR- CD38+ CD8 subset increased (P less than 0.05), compared with the other HIV disease stage patients. CONCLUSION: There is a stage-associated pattern of HLA-DR and CD38 expression on CD8 T-lymphocytes during HIV infection; specific phenotypic patterns may have functional correlates in the host response to the virus.     

Loss of CD4 T lymphocytes in patients infected with human immunodeficiency virus type 1 is more pronounced in the duodenal mucosa than in the peripheral blood. Berlin Diarrhea/Wasting Syndrome Study Group.

Although changes in T lymphocyte subset distribution in the peripheral blood of patients infected with human immunodeficiency virus (HIV) are well defined it is not known whether these changes reflect changes in lymphoid compartments clearly involved in HIV related disease like the intestinal mucosa. This study analysed lymphocytes isolated simultaneously from the peripheral blood and duodenal biopsy specimens by three colour flow cytometry in eight asymptomatic HIV infected patients, 26 AIDS patients, and 23 controls. The proportion of CD4, CD8, CD4-CD8-, or gamma delta T cells did not correlate between circulating and duodenal T cells. CD4 T cells were reduced in the peripheral blood (7.5% (25th-75th percentile, 2-16%) v 52% (41-63%), p < 0.0005) and even more reduced in the duodenum (1% (1-2%) v 36% (23-57%), p < 0.0005) of AIDS patients compared with controls. Patients with asymptomatic HIV infection had intermediate CD4 T cells in the peripheral blood (24% (22-35%); p < 0.002 v controls; p < 0.01 v AIDS) but like AIDS patients very low CD4 T cells in the duodenum (3% (1-6%); p < 0.002 v controls). The ratio of duodenal to circulating CD4+ T cells was significantly reduced to 0.2 (0-1) in AIDS patients (p < 0.001) and even to 0.1 (0.04-0.5) in asymptomatic HIV infected patients (p < 0.002) compared with 0.72 (0.44-0.95) in controls. These findings show an early and preferential loss of duodenal CD4 T cells in HIV infection. Immunological abnormalities in HIV infection are distinct between lymphoid compartments, and profound immunodeficiency may occur in the intestinal immune system although circulating T cells are largely preserved.     

Human immunodeficiency virus DNA is present in a high percentage of CD4+ lymphocytes of seropositive individuals.

Human immunodeficiency virus type 1 (HIV-1) infects predominantly CD4+ cells in human peripheral blood and infection is associated with CD4+ lymphocyte dysfunction in patients with AIDS. To determine the frequency of HIV-1 infection in CD4+ lymphocytes in vivo, peripheral blood CD4+ lymphocytes were isolated by fluorescence-activated cell sorting from HIV-1-infected persons with clinical disease ranging from asymptomatic to AIDS. Using standard and booster polymerase chain reaction analyses, study patients with AIDS and AIDS-related complex (ARC) were found to harbor the HIV-1 genome in at least 10% of CD4+ lymphocytes, and approximately 10-fold less infected cells were found in those with asymptomatic infection. In addition, the peripheral blood mononuclear cells from patients with ARC frequently contained a higher absolute number of HIV-1-infected CD4+ lymphocytes than those with AIDS or asymptomatic infection. It is likely that this high level of infection of CD4+ lymphocytes is the primary cause for the progressive immunologic deficiency observed in patients infected with HIV-1.     

Generation and characterization of ex vivo propagated autologous CD8+ cells used for adoptive immunotherapy of patients infected with human immunodeficiency virus

Cytolytic T lymphocytes play an important role in host defense against viral infections, including human immunodeficiency virus (HIV). In a phase I clinical trial (protocol 080 of the AIDS Clinical Trials Group), generation of CD8+ effector cells from peripheral blood of patients with acquired immunodeficiency syndrome (AIDS)-related complex (ARC) or AIDS and safety of autologous adoptive transfer of these cells were evaluated. For therapeutic infusions, CD8+ T cells were purified by positive selection on anti-CD8 monoclonal antibody-coated flasks from leukapheresed peripheral blood of seven patients. These CD8+ T cells were cultured in the presence of interleukin-2 and phytohemagglutinin for up to 3 weeks to obtain cells sufficient for therapeutic infusions (10(8) to 10(10)). All 31 cell cultures established from the seven patients and used for therapy were highly enriched in CD8+ (mean, 97%), CD8+HLA-DR+ (50%), cytotoxic CD8+CD11b- (82%), and memory CD29+ (78%) T lymphocytes. In vitro expanded CD8+ cells had excellent cytotoxic function at the time they were used for therapy, including HIV-specific activity against autologous targets infected with vaccinia vectors expressing HIV-IIIb antigens, gag, pol, and env. Anti-HIV activity of cultured CD8+ cells was significantly higher than that of autologous fresh peripheral blood lymphocytes. Our results show that CD8+ T lymphocytes obtained from peripheral blood of symptomatic HIV-infected patients can be purified, cultured to obtain large numbers of cells with enhanced anti-HIV activity, and safely infused into patients with AIDS as a form of immunotherapy.     

Parallel decline of CD8＋CD38＋ lymphocytes and viremia in treated hepatitis B patients

AIM:To assess the peripheral T lymphocyte subsets in chronic hepatitis B virus(HBV) infection,and their dynamics in response to adefovir dipivoxil monotherapy.METHODS:Proportions and absolute counts of peripheral natural killer cells,B cells,CD8+,CD4+,CD8+ CD38+,CD8+CD28+ and CD4+CD28+ T cells were determined using three-color flow cytometry in chronic hepatitis B patients(n = 35),HBV carriers(n = 25) and healthy controls(n = 35).Adefovir dipivoxil was initiated in 17 chronic hepatitis B patients who were r...     

CD4+CD7-CD57+ T cells: a new T-lymphocyte subset expanded during human immunodeficiency virus infection.

CD7 and CD57 are two cell surface molecules related to the differentiation or functional stages of CD4+ T cells. The CD4+CD7- T cells represent a minor subset of CD4+ cells in normal individuals and are considered to contain the normal counterpart of Sézary T cells; the CD4+CD57+ peripheral blood lymphocytes (PBL) are detectable in long-term renal allograft recipients. We compared the cell surface expression of these CD7 and CD57 markers on CD4+ T lymphocytes in peripheral blood and lymphoid organs from normal individuals and human immunodeficiency virus (HIV)-infected patients. Our results indicate that CD4+CD7- T cells in normal PBL do not express CD57 and were poorly responsive to anti-CD3 monoclonal antibody (MoAb), the activation being restored by addition of anti-CD28 MoAb. This CD4+CD7- cell subset is increased in peripheral blood during HIV infection, and its progressive expansion mirrors both the absolute and relative decrease of CD4+ T cells. The lack of CD7 expression is correlated with CD57 acquisition on CD4+ T cells because CD4+CD7-CD57+ cells represent a major component of the CD4+CD7- subset in HIV-infected patients. Our results suggest that the presence and the expansion of CD4+CD7-CD57+ T lymphocytes, which do not behave as previously defined helper subsets, may participate to the immune dysfunction observed during HIV infection.     

Biochemical and immunologic abnormalities in peripheral blood T lymphocytes of patients with hemophilia A

Subset distribution, ecto-5'nucleotidase (5'NT) activity, and the generation of allospecific cytotoxic T lymphocytes (CTL) were investigated in peripheral blood T lymphocytes from 39 hemophilia A patients divided into three groups: group A and group B (HIV-patients with CD4:CD8 ratio less than 1 and greater than 1 respectively), and group C (HIV + patients). 5'NT activity was significantly decreased compared with healthy controls in groups B and C. In group B, this deficiency was attributable to expansion of CD8 + CD11 + suppressor cells. In group C, activated (HLA-DR+) CD8+ cells were also present and contributed to 5'NT deficiency. The suppressor cell expansion seemed to be mainly related to AHF infusions, whereas HLA-DR expression was related to HIV infection. CD11+ and HLA-DR+ cells were also expanded in the CD4+ subpopulation of all three groups, whereas CD4+ CD28+ lymphocytes were significantly decreased in group C only. Lastly, alloreactive cytotoxicity was decreased in group B and was normal in groups A and C.