健康傣族人CD3+ CD4+和CD8+ T淋巴细胞绝对数正常值调查

目的了解德宏州健康傣族人群外周静脉血CD3 、CD4 、CD8 T淋巴细胞绝对数和CD4 /CD8 比值的正常值范围。方法应用流式细胞仪(FACSCount)检测253例健康傣族人的CD3 、CD4 、CD8 T淋巴细胞绝对数和CD4 /CD8 比值,并观察以上数值在性别和年龄上的差异。结果CD3 、CD4 、CD8 和CD4 /CD8 的正常值参考范围分别为(1 543±443)个/μl(、849±261)个/μl(、567±225)个/μl和1.63±0.55。CD3 、CD4 在性别和年龄组别间的差异均无统计学意义,而CD8 和CD4 /CD8 在年龄组别间的差异有统计学意义。结论初步建立了健康傣族人群CD3 、CD4 、CD8 和CD4 /CD8 的正常值参考范围,对于指导德宏州艾滋病的诊断及治疗工作有重要意义。     

健康傣族人CD3+ CD4+和CD8+ T淋巴细胞绝对数正常值调查

目的 了解德宏州健康傣族人群外周静脉血CD3^＋、CD4^＋、CD8^＋T淋巴细胞绝对数和CD4^＋／CD8^＋比值的正常值范围。方法应用流式细胞仪（FAcscount）检测253例健康傣族人的CD3^＋、CD4^＋、CD8^＋T淋巴细胞绝对数和CD4^＋／CD8^＋比值，并观察以上数值在性别和年龄上的差异。结果 CD3^＋、CD4^＋、CD8^＋和CD4^＋／CD8^＋的正常值参考范围分别为（1543±443）个/μl、（849±261）个/μl、（567±225）个/μl和1．63±0．55。CD3^＋、CD4^＋在性别和年龄组别间的差异均无统计学意义，而CD8^＋和CD4^＋／CD8^＋在年龄组别间的差异有统计学意义。结论 初步建立了健康傣族人群CD3^＋、CD4^＋、CD8^＋和CD4^＋／CD8^＋的正常值参考范围，对于指导德宏州艾滋病的诊断及治疗工作有重要意义。     

系统性红斑狼疮病人外周血CD8+CD28-细胞群的检测及意义

目的观察系统性红斑狼疮(SLE)病人外周血CD8^ CD28^-细胞群比例与疾病活动程度和临床表现的关系。方法二色流式细胞术检测SLE病人(活动期25例,稳定期26例)及正常人(30名)外周血CD8^ CD28^-细胞群的比例,结合病人血清免疫球蛋白含量等进行分析。结果SLE活动期病人外周血CD8^ CD28^-细胞群的比例较正常人略有升高,而稳定期病人较正常人显著升高;同一活动期SLE病人经过治疗病情缓解后,外周血CD8^ CD28^-细胞较活动期升高,但差异无显著性;复发患者外周血CD8^ CD28^-细胞群的比例明显高于初发患者和正常人;血清免疫球蛋白(IgG、IgA和IgM)含量正常的患者外周血CD8^ CD28^-细胞群的比例明显高于正常人。结论SLE病人外周血CD8^ CD28^-T细胞群的比例的异常与疾病的病程和临床表现相关联．可能参与了疾病的致病机制。     

慢性乙型肝炎外周血淋巴细胞CD8+和CD11b+的表达

为了解慢性乙型肝炎与慢性重型肝炎细胞毒性和抑制性T细胞的变化，我们检测了外周血淋巴细胞CD8^ 、CD11b^ 和CD11b^ 的表达。     

广西壮族自治区健康成年人T淋巴细胞亚群分类绝对计数及CD4/CD8比值调查

目的初步建立广西壮族自治区健康人群外周静脉血CD3、CD4、CD8T淋巴细胞绝对数值和CD4/CD8比值的参考范围.方法用流式细胞仪(FACSCalibur,FCS)、三色免疫荧光试剂和绝对计数管(TnTEST/TruCOUNT),检测110名广西健康成年人(16～56岁)静脉全血CD3、CD4、CD8T淋巴细胞绝对数值和CD4/CD8比值,并观察T淋巴细胞亚群分类计数在性别、年龄和民族上的差别.结果 110名健康成年人检测结果平均值CD3为524±541,CD4为823±305,CD8为601±248,CD4/CD8为1.49±0.53.进一步分析发现,CD4和CD4/CD8在民族分布上(汉族79名、壮族31名)的差异有显著的统计学意义(P＜0.05).结论这次初步建立CD3、CD4、CD8T细胞绝对数值和CD4/CD8比值正常参考范围,对于指导广西的艾滋病诊断及治疗工作有重要意义.     

系统性红斑狼疮患者外周血CD4+ CD8+和CD22+淋巴细胞活化分子CD69的表达

目的探讨系统性红斑狼疮(SLE)患者外周血淋巴细胞(PBL) T细胞(CD4+、CD8+)和B细胞(CD22+)活化分子CD69的表达.方法应用双染色流式细胞术检测CD4、CD8、和CD22细胞亚群CD69分子;在植物凝集素(PHA)刺激后20 h淋巴细胞亚群CD69分子的表达.结果①SLE患者PBMC的CD69分子活动期高于静止期(P＜0.001)和正常对照组(P＜0.01)的表达,SLE静止期患者与正常对照组CD69表达差异无显著性(P＞0.05).②进一步分析CD4+、CD8+和CD22+淋巴细胞亚群的CD69的表达,其中,SLE活动期患者CD4+细胞的CD69表达显著高于静止期(P＜0.001)和正常对照组(P＜0.01)的表达,SLE静止期患者与正常对照组CD69表达差异无显著性(P＞0.05);CD8+细胞活动期高于静止期患者(P＜0.05),其余组间差异无显著性(P＞0.05);CD22+B细胞各组间差异无显著性.③PHA刺激20 h后,CD4+、CD22+B细胞的CD69表达,活动期显著高于静止期患者和正常对照组(P＜0.01).结论 SLE患者外周血CD4+T细胞和CD22+B细胞存在着异常的活化,这种淋巴细胞的异常活化是SLE重要的发病机制之一.     

上海地区健康成人CD4、CD8及CD4/CD8正常值与HIV感染者初诊时值比较

目的 对上海地区 HIV感染者初诊时的 CD4、CD8、CD4/CD8比值与正常值进行比较,以了解早期 T细胞亚群的变化。方法 选取上海地区 64例 HIV感染者,取其 CD4淋巴细胞计数及 CD4/CD8初始值,与正常成人CD4淋巴细胞计数及其CD4/CD8进行比较。并且取其中47例根据感染时间的长短分为2年之内、3～5年、6～8年三组,比较三组之间的差异。结果HIV感染者CD4淋巴细胞计数初始值与正常成人CD4淋巴细胞计数比较差异有显著性,CD4/CD8比值比较差异亦有显著性。结论HIV感染者早期即有CD4淋巴细胞计数下降和CD4/CD8比值下降。感染时间越长,CD4淋巴细胞计数及CD4/CD8比值越低,CD8淋巴细胞计数值也是逐渐下降的。     

流式细胞术检测人外周血CD4^＋,CD8^＋T淋巴细胞方法的建立

外周血ＣＤ４＋、ＣＤ８＋Ｔ淋巴细胞的绝对计数在评价患者免疫状态和监测免疫抑制剂的使用中有着极其重要的作用。所以临床迫切需要一个快速、准确、重复性好和实用的检测方法以及可以参考的正常范围。有关健康中国人外周血ＣＤ４＋、ＣＤ８＋淋巴细胞的正常值范围目前国...     

慢性HBV感染者CD8^＋ T细胞免疫反应的研究

目的观察不同慢性HBV感染者外周血CD8^＋ T细胞的细胞内毒性颗粒和细胞因子的表达水平。方法用rHBcAg作为刺激剂,采用免疫荧光染色结合流式细胞术分析慢性乙型肝炎中度、重度患者以及无症状HBV携带者外周血CD8^＋ T细胞的IFN-γ/IL-4和穿孔素/颗粒酶B表达水平。结果慢性乙型肝炎重度患者CD8^＋T细胞的穿孔素及颗粒酶B百分率显著高于正常对照（P〈0.01）和HBV携带者（P〈0.05,P〈0.01）,中度患者显著高于正常对照（P〈0.05）。2组慢性乙型肝炎IFN-γ＋/CD8^＋ T细胞（Tc1）百分率均高于正常对照和HBV携带者（P〈0.05）。HBV携带者CD8^＋T细胞的穿孔素和颗粒酶B表达以及Tc1百分率与健康对照差异无统计学意义。IL-4^＋/CD8^＋ T细（Tc2）表达各组间差异无统计学意义（P〉0.05）。结论 CD8^＋ T细胞中穿孔素/颗粒酶B表达率的增加以及Tc1细胞增加与慢性HBV感染的肝损伤有关。     

系统性红斑狼疮患者CD4+ CD8+T细胞caspase-3及TNF相关凋亡诱导配体受体的表达

目的探求系统性红斑狼疮（SLE）患者CD4^＋,CD8^＋T淋巴细胞caspase-3及肿瘤坏死闪子相关凋亡诱导配体（TRAIL）受体的表达。方法采用免疫磁珠的方法对20例系统性红斑狼疮患者及10名正常人外周血CD4^＋、CD8^T淋巴细胞进行分离，采用反转录聚合酶链反应（RT—PCR）对CD4^＋、CD8^＋T淋巴细胞caspase-3及TRAIL受体的表达进仃分析。结果TRAIL—R3及TRAIL—R4在两符之间的表达差异无统计学意义，但SLE患者CD8^＋T细胞caspase-3（P=0．003）及TRAIL-R2（P=0．024）的表达增加显著高于正常对照。结论TRAIL—R2介导的通路可能在TRAIL诱导SLE患者T淋巴细胞凋亡中发挥重要的作用。     

Expansions of CD8+CD28- and CD8+TcRVbeta5.2+ T cells in peripheral blood of heavy alcohol drinkers

BACKGROUND: Despite heavy alcohol consumption, only a low percentage of heavy drinkers develop liver disease. Imbalances in T-cell subsets and iron metabolism parameters are common findings in heavy drinkers, yet the possible role played by discrete T-lymphocyte subsets under heavy alcohol consumption remains unclear. METHODS: To gain new insights into the possible role played by T lymphocytes during alcohol consumption, characterization of CD28 expression and TcR repertoire in peripheral blood CD4+ and CD8+ T cells by two and three-color flow cytometry was performed. A group of heavy alcohol drinkers (AHD, n = 71) and a group of age-matched controls (n = 81), both HLA-phenotyped and HFE-genotyped, constituted the groups under study. RESULTS: Marked expansions of CD28- T cells within the CD8+ but not the CD4+ T-cell pool were observed in AHD compared with controls. These CD8+CD28- expansions were paralleled by expansions of CD8+ T cells bearing specific TcR Valpha/beta chains, namely VP5.2. Moreover, AHD, but not controls, carrying the H63D mutation in the HFE gene showed significantly higher percentages of CD28- T cells within the CD8+ T-cell pool than AHD carrying the normal HFE gene. Finally, high numbers of CD8+CD28- T cells in AHD were associated with lower levels of the liver-related enzymes ALT and GGT. CONCLUSIONS: This study showed that under active ethanol consumption, expansions of discrete CD8+ T-cell subsets occur within the CD8+ T-cell pool, that molecules of the MHC-class I locus seem to influence the extent of the expansions, and that high numbers of CD8+CD28- T cells are associated with low levels of liver enzymes in AHD.     

CD8-positive adult T-cell leukemia cells with an integrated defective HTLV-I genome show a paracrine growth to IL-2

We describe a 50-year-old man with adult T-cell leukemia complicated by laryngeal tuberculosis whose tumor cells proliferate in response to IL-2 in a paracrine manner. On admission, the patient's white blood cell count was 17,900/mm³; 73% were abnormal lymphocytes with convoluted nuclel. FACS analysis showed that the tumor cells were CD4-negative, CD8-positive T cells. Southern blot analysis of tumor cells revealed integration of a defective HTLV-I genome lacking gag and pol genes. He was diagnosed with chronic ATL complicated by laryngeal tuberculosis. The primary leukemic cells expressed IL-2Rα and IL-2Rβ detected by FACS and Northern blot analysis and showed marked growth in response to exogenously added recombinant IL-2 in short-term cultures. Northern blot analysis did not show any IL-2 mRNA. We have previously demonstrated that primary leukemic cells from some ATL patients grow in response to IL-2 in an autocrine or paracrine manner. These results suggest that in CD8 ATL, IL-2 may beinvolved in a paracrine manner. © 1994 Wiley-Liss, Inc.     

CD8 cytotoxic T cells in cutaneous leishmaniasis

CD8 T cells are essential in the defence against viruses, yet little is known of their participation in the host defence against parasites, such as Leishmania, which can cause a variety of clinical diseases, such as localized cutaneous, diffuse cutaneous, mucocutaneous and visceral leishmaniasis. Murine models of leishmaniasis suggest that CD8 T cells participate through IFN-gamma production, yet their cytotoxic capacity also plays an important role, as has been found in patients infected with various Leishmania strains, where CD8 T cell cytotoxicity and apoptosis of autologous Leishmania-infected macrophages correlate with cure. Yet the mechanisms underlying the CD8 T activation in patients with leishmaniasis remain an enigma. It is possible that dendritic cells activate CD8 T cells through mechanisms that include antigen cross-presentation. Here we summarize the recent findings of CD8 T cells in cutaneous leishmaniasis and discuss their significance in the control of the disease. Further knowledge in this field will undoubtedly improve the design of therapeutic and vaccine strategies.     

Clonal CD5-positive B lymphocytes in myelodysplastic syndrome with systemic vasculitis and trisomy 8

 Bone marrow and peripheral blood from a myelodysplastic syndrome (MDS) patient with trisomy 8 and associated systemic vasculitis was investigated for clonal lymphoid lineage involvement using simultaneous metaphase and interphase fluorescence in situ hybridization (FISH) and immunocytochemistry with antibodies against CD13 (granulocytic), glycophorin A (GPA, erythroid), and the lymphocytic antigens CD3, CD5, CD20, and CD22. Trisomy 8 was detected in 55% of CD13+, 40% of GPA+, 6% of CD5+, and 5% of CD20/22+, but not in CD3+ cells. In a complementary experiment using interphase FISH on bone marrow cells sorted by flow cytometry, 13% of CD5/CD19 double-positive cells (76% purity) were found to be trisomic. The results indicate the existence of a small CD5-positive B-lymphoid clone as part of the MDS process in this patient. Since CD5/19-positive cells have been proposed to be autoantibody producing, this finding might be a clue to the pathogenesis underlying the propensity for MDS patients to develop immune-mediated complications. Received: 2 September 1996 / Accepted: 17 October 1996     

1型糖尿病患者外周血中CD4^＋CD25^＋与CD8^＋CD28^-调节性T细胞水平的研究

流式细胞仪检测1型糖尿病（T1DM）患者外周血CD4^＋CD25^＋与CD8^＋CD28^-调节性T细胞的水平,发现其外周血CD4^＋CD25^＋T淋巴细胞水平[（2．02±0．43）％]显著低于2型糖尿病（T2DM）组[（6．79±1．75）％]和健康对照（NC）组[（7．84±1．45）％],而CD8^＋CD28^-调节性T细胞水平三组间无差异。     

雷公藤内酯醇对EAE大鼠外周血CD4+、CD8+的影响

目的探讨雷公藤内酯醇（Tri）对急性实验性变态反应性脑脊髓炎（EAE）大鼠外周血CD4^＋、CD8^＋的影响。方法模型组采用豚鼠髓鞘蛋白和福氏完全佐剂诱发大鼠EAE;治疗组在模型组的基础上予以不同剂量Tri,观察各组的发病情况;流式细胞仪检测外周血CD4^＋、CD8^＋;HE染色和Loyez氏髓鞘染色分别观察病理和髓鞘改变。结果高剂量Tri组未出现临床症状,与模型组和低剂量Tri组比较,高剂量Tri组CD8^＋明显增高、CD4^＋／CD8^＋值明显降低（P〈0．05,〈0．05）;脑和脊髓炎症细胞浸润明显减少;髓鞘结构完整。结论Tri对EAE的治疗有剂量相关性,其作用机制与其增加CD8^＋、降低CD4^＋／CD8^＋值,从而调节机体免疫平衡有关。     

Subpopulations of CD34-positive haemopoietic progenitors in fetal blood

Flow cytometry was used to determine the percentage and number of circulating CD34⁺ cells in fetal blood from 100 pregnancies at 13-38 weeks gestation. When expressed as a percentage of the total number of lymphocytes, the proportion of CD34⁺ cells decreased exponentially from a mean of 11.1% (9.2 x 10⁷/1) at 13 weeks to 1.0% (3.0 x 10⁷/1) at 38 weeks (r = 0.751, P < 0.0001. The use of primitive fetal blood CD34⁺ progenitor cells for prenatal somatic gene therapy may have distinct advantages over postnatal somatic gene therapy.