癌症病人抑郁情绪和T细胞等与NK活性关系的研究

本文对癌症病人进行抑郁情绪调查和T淋巴细胞及其亚群和NK细胞活性检测，结果表明，病人的抑郁严重度指数与T4／T8之间有较明显的负相关关系，与T3之间也存在一定的负相关关系，说明病人的抑郁严重度越高，抗肿瘤细胞免疫功能越差。     

头颈部恶性肿瘤患者外周血IL-2和T淋巴细胞亚群的分析

IL—2通过增强NK细胞和LAK细胞的活性,在肿瘤免疫中起着十分重要的作用;而机体免疫应答是十分复杂的。其中T_H细胞(OKT_4~ )和Ts细胞(OKT_(?)~ )及其比值(T_4/T_8)的动态平衡是决定机体免疫状态的重要环节。目前,对同一头颈部恶性肿瘤患者的外周血IL-2活性水平和T细胞亚群平行测定的研究尚未见报道,故本实验对此进行探讨。     

发作期哮喘患者外周血T细胞亚群、B细胞和NK细胞的变化及临床意义

目的：探讨发作期哮喘患者外周血T细胞亚群、B细胞和NK细胞变化及临床意义。方法：采用直接免疫荧光法,用流式细胞术检测30例发作期哮喘患者和30例正常人对照的T细胞亚群、B细胞和NK细胞的变化。结果：与正常对照组比较,发作期哮喘患者CD4^＋T细胞、CD19^＋B细胞和CD4^＋／CD8^＋比值显著增高（P〈0．01）,CD8^＋T细胞显著下降（P〈0．01）和CD56^＋CD16^＋NK细胞下降（P〈0．05）。CD3^＋T细胞无明显变化。结论：发作期哮喘患者的免疫功能紊乱在哮喘发病中起着重要作用。     

胃癌病人自身免疫机能的临床研究

本文报道我科近年来应用经典的NK 酶释放法和间接免疫荧光技术对30例进展期胃癌病人检测其自然杀伤细胞(NK)活性和T 细胞亚群,结果提示胃癌病人术前NK 活性明显低下,仅有1例近于正常值为35.7%,平均为16.70±1.40%,与正常值34.92±0.39%(n=50)比较有显著差异(P<0.     

宫颈癌患者外周血T淋巴细胞及NK细胞的检测及其临床意义

为探讨宫颈癌患者外周血T淋巴细胞亚群和NK细胞活性检测的临床意义,采用流式细胞仪测定宫颈癌患者外周血T淋巴细胞亚群和NK细胞活性,以正常人作对照分析。结果表明,宫颈癌患者外周血CD3＋、CD3＋CD4＋、NK细胞数量及CD3＋CD4＋/CD3＋CD8＋比值较正常对照组均明显下降（P〈0.05）,而CD3＋CD8＋细胞水平显著升高。外周血T淋巴细胞亚群和NK细胞数量的改变与宫颈癌临床病理分期有关,分期越晚,CD3＋细胞、CD3＋CD4＋细胞、CD3＋CD4＋/CD3＋CD8＋细胞比值及NK细胞数量越低,CD3＋CD8＋细胞水平越高;Ⅰ、Ⅱ期宫颈癌患者与Ⅲ、Ⅳ期患者之间有显著差异（P〈0.05）。实验结果提示,宫颈癌患者细胞免疫功能低下,且临床病理分期越晚,其免疫功能越低,检测T淋巴细胞亚群、NK细胞可用于宫颈癌患者的免疫监测。     

调节性T细胞对NK细胞体外杀伤乳腺癌细胞的影响

目的探讨调节性T细胞(Regulatory T cells,T-reg细胞)对NK细胞的影响及可能机制。方法流式细胞术(Flowcytometry,FCM)检测乳腺癌患者外周血中T-reg细胞、NK细胞以及T细胞亚群比例。乳酸脱氢酶(Lactate dehydrogenase,LDH)法检测NK细胞对四种乳腺癌细胞株杀伤活性。ELISA检测上清液中IFN-γ和TGF-β1含量。结果乳腺癌和健康人外周血T-reg细胞分别占CD4~+T细胞的(7.5±3.0)%和(5.1±1.5)%(P<0.01=。T-reg细胞能抑制NK细胞杀伤乳腺癌细胞,同时下调NK细胞分泌IFN-γ,上清液中TGF-β1含量随着T-reg细胞比例的增高而增加。结论T-reg细胞抑制NK细胞杀伤乳腺癌的作用,其机制与T-reg细胞分泌细胞因子TGF-β1有一定关系。     

非霍奇金淋巴瘤患者T细胞亚群、NK细胞检测的临床意义

目的：研究非霍奇金淋巴瘤（NHL）患者外周血T淋巴细胞亚群、NK细胞检测结果的变化与该病的关系及与慢性淋巴腺炎患者细胞免疫功能的不同变化。方法：采用流式细胞仪（FCM）检测非霍奇金淋巴瘤（NHL）患者、慢性淋巴腺炎及正常人外周血T淋巴细胞亚群比例、NK细胞的变化。结果：非雹奇金淋巴瘤患者与正常人比较总的T淋巴细胞、辅助性T淋巴细胞及CD4^＋／CD8^＋比值明显下降（P〈0．05），细胞毒性T淋巴细胞明显升高（P〈0．05），NK细胞则无明显变化（P〉0．05）。非霍奇金淋巴瘤患者与慢性淋巴腺炎患者比较，细胞毒性T淋巴细胞、NK细胞明显升高（P〈0.05），而总的T淋巴细胞、辅助性T淋巴细胞无明显改变（P〉0．05），CD4^＋／CD8^＋比值略有下降但无明显统计学意义。结论：非霍奇金淋巴瘤患者细胞免疫功能明显受到抑制，T细胞亚群及NK细胞的检测对NHL的诊断、治疗、预后判断有一定的临床价值。     

B细胞淋巴瘤患者外周血T淋巴细胞亚群及NK细胞活性的监测

B细胞淋巴瘤为一类较为常见的非霍奇金淋巴瘤（non—Hodgkin lymphoma,NHL）,其发生发展与多种因素有关,但这些因素所起作用仍未完全明确。近年来,随着分子免疫学的发展,越来越多的证据表明T淋巴细胞及NK细胞参与NHL的发病过程。本文采用流式细胞术检测32例B细胞淋巴瘤患者治疗前后外周血T淋巴细胞亚群及NK细胞活性变化,     

结肠癌浸润T淋巴细胞亚群的临床意义

目的目前有报道认为淋巴细胞浸润与结肠癌(CRC)病理学变化相关,但CRC病人体内的淋巴细胞亚群各自的临床意义不清楚,本研究就此进行了探讨。方法我们使用了组织芯片和免疫组化技术检测67例CRC病人肿瘤组织中心区和边缘区CD4+和CD8+细胞密度,并分析其临床意义。结果我们发现,肿瘤浸润淋巴细胞亚群与病人的年龄、肿瘤大小、肿瘤的分期/分级不相关,且CD4+T细胞在不同分期/分级病人的肿瘤中心区和边缘区均无显著性差异。但是,与M1级病人相比,M0级病人肿瘤边缘区有更高的CD8+T细胞密度,而肿瘤中心区CD8+T细胞在两者间无差别。结论肿瘤边缘区高密度的CD8+T细胞与低肿瘤转移率相关。结果还提示对肿瘤浸润淋巴细胞亚群的分析有利于深入理解免疫系统对肿瘤的作用及其机制,且对开发相关干预措施提供了线索。     

Vδ2 γδ T细胞亚群在慢性HCV感染中的特征

目的:探讨γδT细胞及其亚群Vδ1和Vδ2 T细胞在慢性HCV感染中的作用。方法:采用流式细胞术检测人外周血γδT细胞及其亚群Vδ1和Vδ2 T细胞比例变化。结果:慢性HCV感染病人外周血中γδT细胞及其亚群Vδ1和Vδ2 T细胞比例与健康对照者相比无显著差异。相关性分析显示HCV感染患者Vδ2 T细胞数目与肝脏损伤成正相关而与病毒滴度不相关。慢性HCV感染病人Vδ2 T细胞处于活化状态,CD107a表达高于对照组。结论:Vδ2 T细胞亚群参与慢性HCV感染所致肝损伤。     

淋巴结外恶性淋巴瘤外周血T淋巴细胞亚群与免疫指标测定分析

目的：检测原发性淋巴结外恶性淋巴瘤（Primary extranodal lymphoma，PENL）患者外周血T淋巴细胞亚群比例和免疫球蛋白（Ig）水平的变化。方法：分别应用流式细胞术（FCM）和免疫速率比浊法测定T淋巴细胞亚群比例和免疫球蛋白（Ig）以及补体C3、C4含量。结果：PENL组CD3^＋、CD4^＋和CD8^＋明显降低（P〈0．01），原发性结性恶性淋巴瘤（结性组）CD4^＋／CD8^＋比值和NK细胞比较其他两组有显著意义（P〈0．01）；提示PENL组、结性组中CD3^＋、CD4^＋和NK细胞与IgA、IgG、C3比较有显著的相关性（P〈0．01）。结论：结外恶性淋巴瘤患者免疫功能的改变，在其发病机制中的作用不容忽视，可以作为病情进展的免疫学指标。     

小儿急性白血病患者外周血T淋巴细胞亚群的研究

本文用单克隆抗体SACI-Ig花环法测定了小儿急性白血病及再生障碍性贫血患者外周血T淋巴细胞亚群的变化。结果显示,在急性淋巴细胞性白血病及再生障碍性贫血患儿OKT8~ 细胞均明显高于正常,OKT4~ /OKT8~ 比值显著降低,但在急性粒细胞性白血病患儿淋巴细胞亚群变化不明显。这提示,抑制性T细胞(OKT8~ )的增多可能与小儿急性淋巴细胞性白血病及再生障碍性贫血的发生或发展有关。     

Natural killer cells in Behçet''s disease.

We studied natural killer (NK) cell activity and numbers in the peripheral blood obtained from patients with Behçet''s disease (BD) in inactive and convalescent stage, and from healthy controls. Ratios of helper/suppressor cells (OKT4/OKT8) were below 1.0 in patients with active stage and were normal in the convalescent stage of BD. A relative increase of OKT8+ cells and at the same time of Leu 7+ cells was obtained in the active and convalescent BD stages. Double marker analysis revealed that the sub-population of cells expressing both the T8+ and the Leu 7+ antigen (T8+/Leu 7+) was increased in patients with active stage, and normal in the convalescent stage. The frequency of cells reactive with Leu 11 monoclonal antibody (active NK cells) was evaluated in patients with BD. Data from peripheral blood showed an increased sub-population of T8+/Leu 7+ double marker cells, and a decreased Leu 11+ cell sub-population in patients with active BD, but the majority of Leu 7+ cells in patients with convalescent stage lacked OKT8 antigen when investigated in a double marker system. A parallel increase of Leu 11+ cells was observed in the convalescent stage. This phenotypic analysis was carried out with the NK in vitro functional evaluation of cell populations from peripheral blood. NK cell activity in the clinically active stage of BD was significantly lower than that of healthy controls and patients in the convalescent stage. The decrease of peripheral blood NK function in patients with active BD may be related to the presence of immature forms of NK cells and/or to the increased percentage of T8+/Leu 7+ cells.     

Peripheral T Cell Lymphomas: An Immunological Study of Seven Unusual Cases

A multiparameter study of malignant lymph node cells and peripheral blood lymphocytes of seven patients with peripheral T cell lymphoma is presented. The results of monoclonal marker studies showed three cases of helper-suppressor T cell lymphoma (OKT4+, OKT8+), one case of suppressor T cell lymphoma (OKT8+), and three cases of helper T cell lymphoma (OKT4+). Immunophenotypic heterogeneity of neoplastic T cells with expression of pan-T antigens, OKT3+, and OKT11+ (erythrocyte rosetting+) was observed in most patients. Six of the seven cases tested showed Ia and DR antigens. No relationship was detected between patterns of reactivity with T cell reagents and histological types. When tested, the in-vitro malignant T cells of five patients proliferated in response to concanavalin A (Con A), but had poor response to phytohaemagglutinin. The interleukin 2 receptors showed maximum expression on Con A-activated T cells of five patients, and phytohaemagglutinin-activated T cells of one patient. The neoplastic T cells (OKT4+, OKT8+) of one patient studied had suppressor activity for IgG and IgA, and helper activity for IgM synthesis on pokeweed mitogen-induced normal B cell differentiations.     

In vitro immune cell function in six cases of immunoproliferative small intestinal disease after long term remission

We have studied several parameters of in vitro immune cell function in peripheral blood mononuclear cells from six patients with immunoproliferative small intestinal disease after long term remission. We have observed two groups of patients with different patterns of response. (a) After stimulation with pokeweed mitogen (PWM) and Staphylococcus aureus, three patients showed a significant reduction of the Ig synthesis (A, G and M) and the proliferative response. In two of them, we found increased spontaneous suppressor T cell activity. In the third case, the diminished response could not be attributed, according to our assays, either to suppressor T cells, lack of T helper activity (although the number of OKT4+ cells was diminished) or an intrinsic B cell defect. The three patients showed normal or augmented NK activity and an inversion of the OKT4+/OKT8+ ratio was detected in two of them. (b) The remaining three patients showed a normal Ig synthesis after stimulation with PWM and a slightly depressed IgM synthesis in response to S. aureus. They expressed a normal T helper cell function and did not show increased spontaneous suppressor T cell activity. They had low levels of natural killer cytotoxicity and the OKT4+/OKT8+ ratio was not significantly altered. Taken together, our data indicate that significant alterations of the in vitro immune response can be found in peripheral blood mononuclear cells of some immunoproliferative small intestinal disease patients after long term remission.     

In vivo activated cytotoxic T cells in the thyroid infiltrate of patients with Hashimoto''s thyroiditis.

High proportions of T8+ cells with inverted T4/T8 ratio were found in freshly isolated thyroid lymphocytes from patients with Hashimoto's thyroiditis. In addition, about one third of thyroid infiltrating cells expressed the TAC antigen, whereas in patient peripheral blood (PB) or normal lymphocytes from PB or lymphoid organs the percentage of TAC-positive cells was consistently lower than 10%. Following negative selection with OKT4 or OKT8 monoclonal antibodies and complement, TAC+ T cells were enriched in the T8+ cell population. Thyroid infiltrating T cells from two patients underwent two different cloning procedures. In the first, single T cells were initially activated with phytohaemagglutinin (PHA) and interleukin 2 (IL-2), in the other with recombinant IL-2 (rIL-2) alone. The majority of T cell clones obtained by initial PHA-stimulation (55-65%) had the T8+ phenotype, but the frequency of T8+ clones obtained by stimulating T cells with rIL-2 alone was even higher (78 & 71%, respectively). The majority of T8+ clones elicited by PHA (35/37 & 36/38) and all the T8+ clones (36/36 & 22/22) obtained from thyroid infiltrates with initial stimulation by rIL-2 displayed cytolytic activity. Most of cytolytic T8+ clones obtained from thyroid infiltrates with both cloning procedures, displayed NK activity against human K562 and MOLT-4 target cells, but not against a NK-resistant target, such as Raji cells. These data suggest that in Hashimoto's disease a considerable proportion of thyroid infiltrating T cells are in vivo activated T8+ cytolytic T cells with NK activity, which may be of importance in determining or maintaining the tissue damage of the target gland.     

Immunoregulatory T cell subpopulations in patients with scleroderma using monoclonal antibodies.

Twenty-eight patients with scleroderma were compared with 22 healthy age-matched subjects. Monoclonal antibodies were used to detect the whole T cell population (OKT3), T helper cells (OKT4), and T suppressor/cytotoxic cells (OKT8) by indirect immunofluorescence on isolated peripheral blood mononuclear cells. A subset of scleroderma patients (i.e. 30% or eight of 28 patients) exhibited an elevated ratio of OKT4/OKT8 cells which could be accounted for, mainly by a reduction in OKT8 cells compared with controls. The scleroderma patients with an elevated OKT4/OKT8 ratio tended to be younger, have a shorter disease duration and more extensive skin involvement than patients with a normal OKT4/OKT8 ratio. There was no correlation with the presence of autoantibodies, drug therapy, or HLA-DR type. In order to further determine whether this imbalance in immunoregulatory cell subpopulations was specific for scleroderma, we further studied 16 patients with psoriatic arthritis but without manifest autoimmunity and delineated a similar subset of patients with an elevated OKT4/OKT8 cell ratio (i.e. 38% or six of 16 patients). The results demonstrate similar immunoregulatory T cell imbalances in patients with scleroderma and psoriatic arthritis. These findings suggest that numerical imbalances in lymphocyte subpopulations may not be specific for autoimmune disorders.     

Imbalance of T cell subpopulations in patients with chronic lymphocytic leukaemia of the B cell type.

T cell enriched mononuclear cells from the peripheral blood of 20 patients with histologically and immunologically defined chronic lymphocytic leukaemia of the B cell type (B-CLL) and 20 healthy individuals of various ages were investigated with T cell-specific monoclonal antibodies (OKT 4 and OKT 8) with regard to their subpopulation distribution. In B-CLL, a significant increase of lymphocytes reacting with OKT 8 could be demonstrated. Whereas there was a ratio of OKT 4 to OKT 8 of 1 X 72 in the control group, an OKT 4 to OKT 8 ratio of 0 X 67 was found in the B-CLL as a whole. With increasing clinical stage in accordance with the Rai scheme (Rai et al., 1975), a further displacement of this ratio in favour of OKT 8 positive cells was found. These results clearly show that, in peripheral blood of patients with B-CLL, an abnormal distribution pattern of circulating T cell subpopulations is present and that this also has prognostic relevance.