新辅助化疗对局部进展期乳腺癌患者T淋巴细胞亚群及NK细胞免疫功能的影响

目的:探讨局部进展期乳腺癌患者新辅助化疗前、后T淋巴细胞亚群及NK细胞免疫功能的变化。方法:采用流式细胞术检测54例局部进展期乳腺癌患者新辅助化疗前后的静脉血T淋巴细胞亚群及NK细胞免疫功能。美国癌症联合会(American Joint Commitree on Cancer,AJCC)肿瘤分期为Ⅱb期(仅T3N0M0)和Ⅲ期(不包括N3),静脉血于第1周期新辅助化疗治疗前及第3周期化疗后21日抽取,淋巴细胞亚群检测包括:T(CD3+,CD4+,CD8+),NK(CD56+,CD16+),经过3周期新辅助化疗CEF方案(表柔比星、环磷酰胺和5-氟尿嘧啶),根据新辅助化疗临床效果评价分为2组,化疗有效组38例(CR和PR),化疗无效组16例(SD和PD),并与正常体检健康者(40例)作比较。结果:乳腺癌患者治疗前CD4+、CD4+/CD8+明显低于对照组(P<0.01),NK细胞明显低于对照组(P<0.05),新辅助化疗后,有效组总CD3+、CD4+、CD4+/CD8+、NK细胞较治疗前均显著升高(P<0.05),CD8+降低(P<0.05);无效组CD3+、CD4+/CD8+及NK细胞较治疗前显著降低(P<0.05),而CD8+升高(P<0.05)。结论:局部进展期乳腺癌患者免疫功能低下,有效的辅助化疗能提高患者的免疫功能,定期监测免疫功能对指导临床治疗有意义。     

慢性髓系白血病患者外周血T淋巴细胞亚群和NK细胞检测的临床意义

目的 研究不同分期慢性髓系白血病患者外周血T淋巴细胞亚群、NK细胞的变化特点,以及应用伊马替尼治疗后获得完全细胞遗传学反应(complete cytogenetic reponse,CCyR)患者淋巴细胞亚群表达情况.方法 选取我院诊治40例慢性髓系白血病患者,其中急变期9例,慢性期31例.采用流式细胞术检测外周血T淋巴细胞亚群、NK细胞水平,并与正常对照组进行比较.结果 初治慢性期、急变期CML患者外周血CD3+、CD4+、CD8+T细胞百分率及CD4+/CD8+比值均低于正常对照组,且急变期CD3+、CD4+T细胞百分率及CD4 +/CD8+比值下降尤为突出(P＜0.01);初治慢性期患者NK细胞百分率与正常对照组相比无差异,而急变期患者低于正常对照组(P＜0.05).与正常组对比,伊马替尼治疗首次获得完全细胞遗传学反应患者仅CD4+T细胞百分率降低,差异具有统计学意义(P＜0.05);但获得完全细胞遗传学反应后应用伊马替尼治疗大于12月患者,CD3+、CD4+T细胞百分率及CD4 +/CD8+比值较正常对照组均有所下降(P＜0.05).与治疗前相比,治疗首次获得完全细胞遗传学反应患者CD3+、CD4+T细胞百分率升高(P＜0.05),而缓解后应用伊马替尼治疗大于12月患者T淋巴细胞亚群无改变(P＞0.05);各组的NK细胞百分比无差异(P＞0.05).初诊CML患者、急变期CD4+/CD8+的比值与BCR-ABLl/ABL1的比值呈负相关.结论 CML患者存在细胞免疫调节功能异常,且机体免疫功能与疾病分期密切相关.伊马替尼治疗初次获得完全细胞遗传学反应患者细胞免疫功能得到改善,但长期应用抑制患者细胞免疫功能.     

多发性硬化患者淋巴细胞亚群的研究

目的观察多发性硬化患者外周血及脑脊液中淋巴细胞亚群的水平. 方法用碱性磷酸酶抗磷酸酶法检测了56例多发性硬化(MS)活动期患者外周血和脑脊液(CSF)的淋巴细胞亚群.结果:活动期MS患者外周血CD4+、CD8+细胞较对照组减少,CD25+细胞、CD4+/CD8+比值较对照组升高(p<0.05).CSF中CD4+、CD25+细胞、CD4+/CD8+比值较对照组升高,CD8+细胞降低(p<0.05<0.05),且CSF中淋巴细胞亚群均高于自身外周血中的相应细胞(p<0.05).经肾上腺皮质类固醇激素治疗后,随病情缓解,外周血、CSF中的淋巴细胞亚群均有不同程度的改善. 结论淋巴细胞亚群可能参与MS的发病,并与MS的缓解-复发有关.     

恢复期SARS患者淋巴细胞亚群分布及其与T淋巴细胞Ag-NOR含量相关性的初步分析

目的　通过检测恢复期SARS患者外周血淋巴细胞亚群分布及其与T淋巴细胞核仁形成区嗜银蛋白 (Ag NOR)含量的相关性分析 ,探讨恢复期SARS患者的免疫状态及淋巴细胞亚群与活性状态改变的关系。方法　以流式细胞术检测患者外周血淋巴细胞亚群 ,用KL型免疫图像分析系统检测外周血T淋巴细胞Ag NOR ,对两者进行相关分析。结果　恢复期患者T淋巴细胞总数及CD4 +亚群基本正常 ,而CD8+亚群偏高 ,CD4 +/CD8+降低 ,CD4 +/CD8+<1的比例占 37.4 % ,激活T细胞中以CD8+细胞为主。B细胞比例正常。NK细胞明显低于对照组。重症患者CD4 +、CD4 +/CD8+、CD1 9+CD5+降低及CD8+、CD3+HLA DR+升高。 50岁以上及使用大剂量激素患者CD3+HLA DR+升高。淋巴细胞Ag NOR的含量 (IS % )在正常范围 ,但患者IS值呈偏态分布 ,低于正常范围者占 4 4.99%。淋巴细胞Ag NOR的含量与CD3+、NK、CD3+HLA DR+、CD3+CD2 5+在统计学上具有相关性。结论　恢复期SARS患者免疫功能趋于恢复正常 ,但部分患者的淋巴细胞亚群数量及淋巴细胞活性仍未恢复正常 ,这些病人在临床症状得到改善之后 ,尚需一定时间的观察随访 ,以了解SARS病毒对人体免疫机能的长期影响。     

传染性单核细胞增多症患儿外周血淋巴细胞亚群的分布及意义

探讨传染性单核细胞增多症(infectious mononucleosis,IM)患儿外周血中淋巴细胞亚群的分布及临床意义。采用流式细胞术检测131例IM患儿和50例体检健康儿童外周血中淋巴细胞亚群的表达,131例IM患儿中有26例患儿收集到对应的丙种球蛋白(intravenous immunoglobulin,IVIG)治疗后全血,流式细胞术检测淋巴细胞亚群在IM患儿IVIG治疗前后分布比例的差异。结果显示,与健康对照组相比,IM患儿CD3~+T细胞和CD8+T细胞的表达水平明显增高(均P<0.000 1),CD4~+T细胞、NK细胞、B淋巴细胞及CD4~+/CD8+T细胞比值水平明显降低(均P<0.000 1)。IM患儿急性期CD4~+、CD8~+T细胞及CD4~+/CD8~+T细胞比值升高及降低水平与患儿外周血异型淋巴细胞升高的百分率呈现正相关趋势。与IVIG治疗前相比,IM患儿IVIG治疗后外周血CD3~+T细胞和CD8~+T细胞的表达水平有所减低,但仍高于健康对照组(均P<0.01),治疗后CD4~+T细胞、NK细胞、B淋巴细胞及CD4~+/CD8~+T细胞比值水平增高,但其中治疗后CD4~+T细胞、B淋巴细胞及CD4~+/CD8~+T细胞比值水平仍显著低于健康对照组(均P<0.01)。综上所述,检测淋巴细胞亚群对IM患儿的细胞免疫状况评估、辅助诊断和指导治疗具有重要的临床意义。     

多发性骨髓瘤患者淋巴细胞亚群变化对免疫功能的影响研究

目的分析多发性骨髓瘤（MM）患者外周血T 淋巴细胞尧B 淋巴细胞和自然杀伤（NK）细胞的变化遥方法收集69 例 MM 患者及52 例健康体检人员的抗凝血,用流式细胞仪检测外周血淋巴细胞总数（Lym）尧CD3+ T 淋巴细胞尧CD19+ B 淋巴细 胞及CD16+56+NK细胞数量遥结果与对照组比较,MM 组Lym尧CD3+尧CD4+尧CD8+尧CD4+/CD8+尧CD19+等6个项目差异均有 统计学意义（约0.05）,CD16+56+差异无统计学意义（跃0.05）遥结论MM患者在疾病进程中与T淋巴细胞亚群及B淋巴细胞尧 Lym 密切相关,对评价MM 患者的免疫状况尧疾病进展和疗效等方面具有重要作用遥     

手足口病危重型患儿淋巴细胞亚群及免疫球蛋白检测

目的:观察手足口病危重型患儿外周血淋巴细胞亚群及免疫球蛋白的变化。方法:以临床确诊入住ICU的60例手足口病危重型患儿为研究对象,并与30例健康儿童进行对比分析。应用流式细胞术检测抗凝外周全血的淋巴细胞亚群:T淋巴细胞(CD3+CD19-)、辅助T细胞Th(CD3+CD4+)、抑制T细胞Ts(CD3+CD8+)、B细胞(CD3-CD19+)和NK细胞(CD3-CD56+)的相对计数,计算Th/Ts比值。同时进行免疫球蛋白IgG、IgA、IgM测定。结果:手足口病危重型患儿外周血T淋巴细胞、Th细胞、Ts细胞的百分率均明显低于对照组(P<0.05);B细胞的百分率及免疫球蛋白IgG、IgA则显著高于对照组(P<0.05);两组间NK细胞百分率、免疫球蛋白IgM及Th/Ts比值均无明显差异(P>0.05)。结论:手足口病危重型患儿存在细胞免疫和体液免疫功能紊乱。     

急性脾破裂患者手术前后外周血淋巴细胞亚群的变化及临床意义

目的:观察急性脾破裂患者在脾切除后外周血淋巴细胞亚群水平的改变。探讨短期内脾切除术对机体免疫功能的影响。方法:利用流式细胞仪测定74例急性脾破裂患者在手术前后淋巴细胞亚群水平。结果:急性脾破裂患者手术后CD 3T淋巴细胞及CD 4T淋巴细胞较手术前升高(P<0.01);CD(16 56)细胞(即NK细胞)和CD 19B淋巴细胞较手术前降低(P<0.05);而CD 8T淋巴细胞及CD 4/CD 8较手术前无明显差异(P>0.05)。结论:脾切除术后,短期内患者的免疫功能有改变。     

多发性骨髓瘤患者外周血淋巴细胞亚群分析及与预后因子的相关性

目的 通过对多发性骨髓瘤(MM)患者外周血淋巴细胞亚群的检测以评价MM患者机体的免疫功能状态.方法 采用流式细胞术检测36例MM患者和25例健康志愿者外周血T、B淋巴细胞、NK细胞及CD4+CD25T细胞的表达.结果 与正常对照组相比,MM患者外周血的CD4、CD19细胞的表达显著下调,CD8细胞的表达显著上调,CD4/CD8比值则显著降低(P＜0.05或＜0.01);MM患者外周血的CD4+CD25T细胞占CD3+T细胞的比例明显增高(P＜0.01),且与血清中的β2-MG浓度成正相关(γ=0.56,P＜0.05).结论 MM患者体内存在淋巴细胞亚群的异常表达、CD4+CD25+Treg细胞的异常扩增,可能是MM患者体内广泛存在免疫缺陷的一个主要原因.     

卵巢癌患者的免疫功能探讨

目的分析卵巢癌患者外周血T淋巴细胞亚群、免疫球蛋白的变化,监测卵巢癌患者的免疫功能水平。方法用流式细胞仪测定45例卵巢癌患者、35例卵巢良性肿瘤患者和30名健康对照组的外周血T淋巴细胞亚群,采用免疫比浊法测定3组样本血清Ig A、Ig G、Ig M含量。结果卵巢癌患者全血CD8+明显高于健康对照组(P<0.05),而血CD4+及CD4+/CD8+比值则显著低于健康对照组(P<0.05)。Ig G、Ig M水平均高于对照组(P<0.05),而Ig A水平两组无显著差异(P>0.05)。外周血T淋巴细胞亚群和免疫球蛋白的改变与卵巢癌病理分期有关,分期越晚,CD4+及CD4+/CD8+比值越低,CD8+、Ig G、Ig M水平越高,Ⅱ期与Ⅲ期、Ⅳ期之间有显著性差异(P<0.05)。结论卵巢癌患者细胞免疫功能降低,体液免疫功能增强。外周血T细胞亚群和免疫球蛋白的检测对判断卵巢癌患者的病情、预后以及机体的免疫功能的判断有一定意义。     

Abnormalities in the T and NK lymphocyte phenotype in patients with Nijmegen breakage syndrome

Nijmegen breakage syndrome (NBS) is a rare autosomal recessive disorder characterized by spontaneous chromosomal instability with predisposition to immunodeficiency and cancer. In order to assess the cellular basis of the compromised immune response of NBS patients, the distribution of functionally distinct lymphocyte subsets in peripheral blood was evaluated by means of double-colour flow cytometry. The study involved the 36 lymphopenic patients with a total lymphocyte count < or =1500 microl (group A) and seven patients (group B) having the absolute lymphocyte count comparable with the age-matched controls (> or =3000 microl). Regardless of the total lymphocyte count the NBS patients showed: (1) profound deficiency of CD4+ and CD3/CD8+ T cell subsets and up to fourfold increase in natural killer (NK) cells, almost lack of naive CD4+ T cells expressing CD45RA isoform, unchanged percentage of naive CD8+ cell subset (CD8/CD45RA+) but bearing the CD8 receptor of low density (CD8low); (2) normal expression of CD45RA isoform in the CD56+ lymphocyte subset, profound decrease in alpha beta but up to threefold increase in gamma delta-T cell-receptor (TCR)-positive T cells; (3) shift towards the memory phenotype in both CD4+ and CD8+ lymphocyte subpopulations expressing CD45RO isoform (over-expression of CD45RO in terms of both the fluorescence intensity for CD45RO isoform and the number of positive cells); and (4) an increase in fluorescence intensity for the CD45RA isoform in NK cells population. These results indicate either a failure in T cell regeneration in the thymic pathway (deficiency of naive CD4+ cells) and/or more dominant contribution of non-thymic pathways in lymphocyte renewal reflected by an increase in the population of CD4+ and CD8+ memory cells, gamma delta-TCR positive T as well as NK cell subsets.     

广州市健康儿童和成人淋巴细胞亚群数量的对比分析

目的比较儿童和成人淋巴细胞亚群百分率和绝对数量的异同,更好地为本地区临床诊断和治疗提供参考。方法采用双色流式细胞术分析健康儿童和成人外周血T淋巴细胞亚群(CD3+细胞、CD3+CD4+细胞、CD3+CD8+细胞)、B淋巴细胞(CD19+)、CD3-CD56+NK细胞(自然杀伤细胞)的数量。结果儿童组总淋巴细胞(百分率和绝对数)、CD19+淋巴细胞(百分率和绝对数)、CD3+淋巴细胞百分率、CD3+CD4+淋巴细胞百分率、CD3+CD8+淋巴细胞绝对数、CD3-CD56+细胞绝对数、CD4+/CD8+细胞比值与成人组比较差异均有统计学意义;CD3+CD8+淋巴细胞百分率、CD3-CD56+细胞百分率、CD3+淋巴细胞绝对数和CD3+CD4+淋巴细胞绝对数与成人组比较差异无统计学意义。儿童组CD3+CD8+淋巴细胞、CD19+淋巴细胞、CD3-CD56+细胞的百分率和绝对数均高于成人组,CD3+淋巴细胞(百分率和绝对值)、CD3+CD4+淋巴细胞(百分率和绝对值)和CD4+/CD8+细胞比值低于成人组。相同与不同性别组内均有多个指标存在显著差异。结论淋巴细胞亚群的分布受年龄、性别因素的影响,淋巴细胞亚群绝对数与百分率随年龄的变化不总是保持一致的。用于血液性和免疫性疾病诊断时,采用淋巴细胞亚群绝对数作为参考指标优于百分比率。     

Differential expression of T cell antigens in normal peripheral blood lymphocytes: a quantitative analysis by flow cytometry.

AIMS: To obtain reference values of the level of expression of T cell antigens on normal lymphocyte subsets in order to disclose differences which could reflect their function or maturation stages, or both. METHODS: Peripheral blood from 15 healthy donors was processed by flow cytometry with triple colour analysis. For each sample phycoerythrin (PE) conjugated CD2, CD4, CD5, CD8, and CD56 monoclonal antibodies were combined with Cy5-R-phycoerythrin (TC) conjugated CD3 and fluorescein isothiocyanate (FITC) conjugated CD7; CD2- and CD7-PE were also combined with CD3-TC and CD4-FITC. Standard microbeads with different capacities to bind mouse immunoglobulins were used to convert the mean fluorescence intensity (MFI) values of the lymphocyte subsets identified by multiparametric flow cytometry into the number of antigen molecules per cell, measured as antibody binding capacity (ABC). RESULTS: CD4+ (helper/inducer) T cells exhibit a higher CD3 antigen expression compared with CD8+ (suppressor/ cytotoxic) T lymphocytes. Within the CD4+ T cells, the CD4+CD7- subset expressed a lower level of CD3 compared with CD4+CD7+ and CD8+CD7+ cells, and higher CD2 and CD5 expression than the main CD3+CD7+ subset. Major differences in antigen expression were also detected between CD3+ T cells and CD3-CD56+ natural killer (NK) cells: NK cells exhibited higher levels of CD7 and CD56 and lower levels of CD2 and CD5 than T cells. Significantly lower CD5 expression was also detected in the small CD5+ B lymphocyte subset compared with T cells. CONCLUSIONS: Quantitative flow cytometry with triple colour analysis may be used to detect antigen modulations in disease states and to increase the accuracy of diagnosis by comparison with findings in normal counterparts.     

Maturational alterations of peripheral T cell subsets and cytokine gene expression in 22q11.2 deletion syndrome

Chromosome 22q11.2 deletion syndrome is a common disorder characterized by thymic hypoplasia, conotruncal cardiac defect and hypoparathyroidism. Patients have a risk of infections and autoimmunity associated with T lymphocytopenia. To assess the immunological constitution of patients, the numerical changes and cytokine profile of circulating T cells were analysed by flow cytometry and real-time polymerase chain reaction (PCR). CD3+, CD4+, T cell receptor (TCR)alphabeta+ or CD8alphaalpha+ cell counts were lower, and CD56+ cell counts were higher in patients than in controls during the period from birth to adulthood. The ageing decline of CD3+ or CD4+ cell counts was slower in patients than in controls. The proportion of CD8alphaalpha+ cells increased in controls, and the slope index was larger than in patients. On the other hand, both the number and proportion of Valpha24+ cells increased in patients, and the slope indexes tended to be larger than in controls. The positive correlation of the number of T cells with CD8alphaalpha+ cells was observed only in patients, and that with Valpha24+ cells was seen only in controls. No gene expression levels of interferon (IFN)-gamma, interleukin (IL)-10, transforming growth factor (TGF)-beta, cytotoxic T lymphocyte antigen 4 (CTLA4) or forkhead box p3 (Foxp3) in T cells differed between patients and controls. There was no significant association between the lymphocyte subsets or gene expression levels and clinical phenotype including the types of cardiac disease, hypocalcaemia and frequency of infection. These results indicated that T-lymphocytopenia in 22q11.2 deletion patients became less severe with age under the altered composition of minor subsets. The balanced cytokine profile in the limited T cell pool may represent a T cell homeostasis in thymic deficiency syndrome.     

Origin of CD57+ T cells which increase at tumour sites in patients with colorectal cancer.

Human T cells carrying natural killer (NK) markers, CD57 or CD56 antigens, appear to be distinguishable from other T cell subsets in terms of their granular lymphocyte morphology and their numerical increase in patients with AIDS and in recipients of bone marrow transplantation. At the beginning of this study, we observed that CD57+ T cells as well as CD56+ T cells were abundant at tumour sites in many patients with colorectal cancer. Since all these findings for CD57+ T cells are quite similar to those of extrathymic T cells seen in mice, we investigated how CD57+ T cells are distributed to various immune organs in humans. They were found to be present mainly in the bone marrow and liver, but to be completely absent in the thymus. Similar to the case of extrathymic T cells in mice, they were observed to consist of double-negative CD4-8- subsets as well as single-positive subsets (preponderance of CD8+ cells), and to contain a considerable proportion of gamma delta T cells. These features are striking when compared with those of CD57- T cells, which are characterized by an abundance of CD4+ subsets and alpha beta T cells. Not only at tumour sites but also in the peripheral blood, some patients with colorectal cancer displayed elevated levels of CD57+ cells. These results suggest that CD57+ T cells may be of extrathymic origin, possibly originating in the bone marrow and liver, and may be associated with tumour immunity, similar to another extrathymic population of CD56+ T cells in humans.     

Normal expression of p55 interleukin 2 receptor (CD25) by lymphocytes from former blood donors seropositive for human T lymphotropic virus.

Dysregulated expression of the p55 interleukin 2 receptor (CD25) is characteristic of adult T cell leukemia (ATL) associated with human T lymphotropic virus (HTLV) infection. In order to determine if similar changes characterize HTLV infection in the apparent absence of ATL, CD25 expression by peripheral blood lymphocytes from HTLV-seropositive former blood donors was measured using a sensitive dual-color cytofluorometric assay. When comparing the HTLV-seropositive group (N = 19) and a seronegative control group (N = 20), no significant differences were observed in either the proportions of the major lymphocyte subsets (CD3, CD4, CD8, CD19, CD16/56) coexpressing CD25 or the phenotypic distribution of CD25+ cells among these lymphocyte subsets. Similarly, the total percentages of CD3, CD4, CD8, and CD19 cell subsets were unchanged; however, the percentage of CD16/56+ cells was significantly decreased in the HTLV group and reflected a decrease in the percentage of CD16/56 cells lacking CD25. These findings indicate that HTLV infection without ATL is characterized by normal CD25 expression by lymphocytes and a decreased percentage of lymphocytes with a phenotype characteristic of natural killer cells.     

Lymphocyte subsets in HTLV-II-infected former blood donors: relationship to spontaneous lymphocyte proliferation.

Previous studies showed that over 70% of HTLV-seropositive blood donors from the Los Angeles area are infected with HTLV-II; further, mononuclear cells from about half of these HTLV-II+ donors exhibit spontaneous lymphocyte proliferation (SLP) during in vitro culture. To determine if HTLV-II+SLP+ donors exhibit more marked immune system changes than HTLV-II+SLP- donors, lymphocyte subsets for these two HTLV-II+ groups were compared to an uninfected control group. The percentage of lymphocytes expressing CD3 was significantly increased and the percentage expressing a CD16/56+CD3- phenotype (natural killer cells) was significantly decreased in the HTLV-II+SLP+ group (N = 34) versus the control group (N = 49). On the basis of absolute numbers, the lymphocyte number was significantly higher in the HTLV-II+SLP+ group than in the control group and reflected significant increases in the numbers of both CD4 and CD8 subsets of T cells. Analysis of proportional changes in CD4 and CD8 cell subsets revealed significant increases in the proportions of CD4 cells expressing HLA-DR, CD8 cells expressing HLA-DR, and CD8 cells expressing CD45RO for the HTLV-II+SLP+ group versus the control group. For all phenotypic parameters measured, no significant differences were noted when comparing the HTLV-II+SLP- group (N = 21) and the control group. Cell culture experiments utilizing purified CD4 cells and CD8 cells from a subset of each study group revealed that in vitro spontaneous proliferative capacity resides within both the CD4 cell and CD8 cell populations from SLP+ individuals. These findings show that changes in circulating lymphocyte subsets in HTLV-II infection are found only in association with SLP, and that the capacity to exhibit SLP characterizes both CD4 and CD8 lymphocyte subsets.     

慢性HIV/AIDS患者T淋巴细胞凋亡与疾病进展关系的研究

目的 探讨慢性未经抗病毒治疗的HIV/AIDS患者T淋巴细胞及各亚群凋亡与疾病进展的相关性.方法 以36例慢性未经抗病毒治疗的HIV/AIDS患者为研究对象,根据CD4细胞计数分为3组:<200个/μl组,200～350个/μl组,>350个/μl组,同时选取16例健康志愿者作对照,分离外周血单核细胞(PBMC)后,采用CD45RO及CD27标记T细胞亚群,Annexin V标记细胞凋亡,用流式细胞仪检测各项指标.其中4例患者及4例健康志愿者的PBMC在体外培养,比较分析体外培养0、3、6、12、24 h不同时间点T细胞凋亡的变化情况.结果 (1)HIV/AIDS患者CD4~+、CD8~+T细胞及各亚群上Annexin V表达百分比均显著高于健康人(P<0.05),但3组患者之间比较差异无统计学意义(P>0.05);(2)HIV/AIDS患者CD4~+、CD8~+T细胞及各业群上Annexin V表达百分比与CD4~+T细胞计数及病毒载显均无显著相关性(P>0.05);(3)随着体外细胞培养时间的延长,HIV/AIDS患者CD4~+T细胞的凋亡及死亡细胞百分比均显著高于健康人(P<0.05),并且HIV/AIDS患者CD4~+T细胞较CD8~+T细胞更易发生凋亡和死亡.结论 HIV/AIDS患者的T细胞凋亡水平显著高于健康人,并且CD4~+T细胞较CD8~+T细胞更易发生凋亡和死亡,但是T细胞凋亡水平与HIV的疾病进展程度并没有相关性.     

环孢素A联合沙利度胺治疗骨髓增生异常综合征对T细胞亚群影响的初步研究

为探讨环孢素A联合沙利度胺治疗骨髓增生异常综合征对T细胞亚群的影响,我们对2007年6月至2012年6月我院血液内科门诊和住院低中危MDS患者22例,在给予环孢素A联合沙利度胺治疗前后,应用流式细胞仪对于患者和健康志愿者外周血标本进行T淋巴细胞亚群检测。我们发现:CD4+T细胞在MDS患者外周血的百分比低于正常对照组(P<0.05),CD4/CD8比值与正常对照组相比有显著性差异(P<0.05)。治疗显效组患者治疗后的CD4+T细胞百分率增高(P<0.05),CD8+T细胞百分率减低(P<0.01),CD4/CD8比值在治疗前后有显著性差异(P<0.05)。在治疗前,无效组和显效组在T细胞总数百分率,CD4+T、CD8+T细胞百分率以及CD4/CD8的比值均有统计学意义(P<0.05)。由此我们认为,MDS患者存在T淋巴细胞亚群免疫失调,细胞免疫功能紊乱。CsA以及沙利度胺治疗MDS的机制可能与Th,Ts细胞比率改变有关。