无症状期艾滋病HIV感染者CD+4 CD+8 T淋巴细胞检测结果分析

目的分析本地区人类免疫缺陷病毒(HIV)感染者免疫力被破坏情况,制订相应的艾滋病(AIDS)防治方案.方法对1344例无症状HIV感染者进行CD+4、CD+8 T淋巴细胞检测.结果发现18例免疫力极度低下(CD+4＜30个/mm3)的处于无症状期的HIV感染者,其CD+8T淋巴细胞值≥(400～800个/mm3).结论无症状的HIV感染者中存在着免疫力极度低下者,由于高水平的CD+8T淋巴细胞的抗病毒作用而使之处于无症状期,但其免疫系统已严重受损,任何机会性感染都会诱发他们发展为AIDS.测定其CD+4、CD+8T淋细胞作为预见HIV感染状态和进展为AIDS的重要参考指标,具有不可替代的作用.     

851例HIV/AIDS患者抗病毒治疗后病毒载量和CD4+T淋巴细胞检测结果分析

目的 了解郑州市851例HIV/AIDS患者抗病毒治疗后免疫重建效果及病毒抑制情况,分析病毒载量与CD4+T淋巴细胞的相关性.方法 采集HIV/AIDS患者的外周血用于CD4+T淋巴细胞的计数,分离血浆后采用荧光探针法检测病毒载量(VL).应用SPSS 22.0对数据进行统计分析.结果 抗病毒治疗后,58.99％患者C...     

CD8~+ T淋巴细胞对HIV感染者生存质量的作用

目的分析探讨CD8+ T淋巴细胞对HIV感染者生存质量的作用,为提高患者的生存质量和免疫重建提供思路。方法对844例感染HIV病毒14年以上的艾滋病感染者和艾滋病患者,进行CD4+和CD8+ T淋巴细胞检测。结果发现25例长期感染者,CD4+ T细胞低下≤200个/mm3个,但CD8+ T细胞≥800个/mm3,他们没有并发症状,身体基本健康,生存质量明显高于有并发症的艾滋病患者。结论高水平的CD8+ T淋巴细胞,对于感染者抵抗并发症状,提高生存质量可能起到非常重要的作用,提示CD8+ T淋巴细胞在患者免疫重建和对抗击HIV病毒可能起到了重要的作用。     

抑肽酶对脑缺血再灌注大鼠脑组织CD4~+、CD8~+T淋巴细胞表达的影响

目的:探讨抑肽酶在细胞免疫应答的干预下对脑缺血再灌注后继发性脑损伤的保护作用。方法:105只SD大鼠随机分为假手术组、模型组、抑肽酶组(n=35),采用大鼠大脑中动脉闭塞法制作局灶性脑缺血再灌注模型。抑肽酶组在大鼠脑缺血前24h及再灌注即刻、24h、4d、6d、8d、10d、12d、14d分别尾静脉给予抑肽酶,其余组给予生理盐水。应用免疫组织化学方法检测大鼠脑缺血再灌注不同时间段CD4+、CD8+T淋巴细胞的浸润情况。结果:与假手术组比较,模型组大鼠在缺血再灌注损伤后各时间点脑组织内CD4+、CD8+T淋巴细胞计数均明显增加,10d达高峰;与模型组比较,抑肽酶组大鼠脑组织内CD4+、CD8+T淋巴细胞计数在缺血再灌注损伤后各时间点均更低(P<0.05),8d达高峰。结论:抑肽酶可能通过抑制CD4+、CD8+T淋巴细胞在缺血再灌注损伤后脑组织内的浸润而减少细胞免疫应答介导的神经元凋亡,从而减轻脑组织继发性损伤。     

HIV病毒阳性患者合并口腔病损与CD4+T淋巴细胞免疫识别的相关性

目的 分析HIV阳性合并各种口腔病损患者CD+4T细胞免疫识别的变化趋势,探讨识别特征性细胞因子对于认识AIDS的发生发展规律及控制口腔表征的临床治疗具有重要意义.方法 现将作者在埃塞俄比亚首都亚的斯亚贝巴大学口腔医学中心收住的32例HIV感染伴口腔黏膜损害患者入选本项临床观测;在入院后1周内及治疗过程中反复采集外周血...     

HIV/AIDS患者外周血总淋巴细胞数与CD4+T淋巴细胞数的相关性分析

目的 探讨HIV/AIDS患者外周血总淋巴细胞数(total lymphocytecount,TLC)与CD4阳性(CD4 )T淋巴细胞数的相关性,了解用TLC预测CD4 T淋巴细胞数的可行性.方法 分析602例HIV/AIDS患者共计1883例次TLC和CD4 T淋巴细胞数相关性,根据灵敏度、特异度、阳性预测值和阴性预测值,估计预测CD4＜100个/μl、CD4＜200个/μl和CD4＜350个/μl的TLC的临界值.相关分析和回归分析采用SPSS 13.0统计软件.结果 TLC与CD4 T淋巴细胞数显著正相关(r=0.631,P＜0.001).用TLC＜1200个/μl预测CD4＜100个/μl灵敏度为70.3%,特异度为82.9%,阳性预测值为71%,阴性预测值为80.6%;TLC＜1500个/μl预测CD4＜200个/μl灵敏度为71.1%,特异度为75.4%,阳性预测值为80.6%,阴性预测值为64.4%;用TLC＜1800个/μl预测CD4＜350个/μl灵敏度为76.1%,特异度为75.9%,阳性预测值为92.7%,阴性预测值为45.1%.结论 在无条件检测CD4 T淋巴细胞计数的情况下,可用TLC预测CD4 T淋巴细胞计数.分别以TLC＜1200个/μl、＜1500个/μl和＜1800个/μl预测CD4＜100个/μl、＜200个/μl和＜350个/μl是比较合适的.     

HIV/AIDS患者T淋巴细胞变化情况及其临床意义

目的探讨HIV/AIDS免疫病理的改变特点,为AIDS防治工作提供科学依据。方法以71例HIV感染者和54例AIDS患者为研究对象,并选取140例健康体检者为对照组,检测分析3组外周血CD4＋、CD8＋T淋巴细胞的变化及其临床意义。结果 CD4＋细胞计数正常对照组[（670±361）个/μL]〉HIV组[（378±235）个/μL]〉AIDS组[（154±104）个/μL]（P〈0.01）;CD8＋细胞计数HIV组[（918±823）个/μL]明显高于正常成人组[（489±250）个/μL]与AIDS组[（512±319）个/μL]（P〈0.05）;CD4＋/CD8＋的比值正常成人组（1.48±0.89）明显高于HIV组（0.41±0.37）和AIDS组（0.18±0.16）（P〈0.05）。结论本地区HIV/AIDS患者T淋巴细胞亚群的变化过程与疾病进展有良好的相关性。     

HIV/HBV/HCV共感染者CD4＋、CD_8＋T淋巴细胞计数的对比分析

目的研究HIV/HBV/HCV共感染者外周血CD4＋、CD8＋T淋巴细胞计数变化,探讨共感染对HIV感染进程及患者机体免疫功能的影响。方法对75例HIV共感染样本进行外周血CD4＋、CD8＋T淋巴细胞计数测定并进行分析。结果 4组的CD4＋T淋巴细胞计数比较差异无统计学意义（P〉0.05）;4组的CD8＋T淋巴细胞计数及CD4＋/CD8＋比较差异有统计学意义（P〈0.05）。结论共感染会影响患者外周血CD8＋T淋巴细胞计数及CD4＋/CD8＋比值,HIV/HBV/HCV三重感染患者的CD8＋T淋巴细胞计数较其他组高。     

CD4~+细胞与CD8~+细胞比值与新生儿缺氧缺血性脑病的相关性分析

目的明确CD4~+细胞与CD8~+细胞比值与新生儿缺氧缺血性脑病病情的相关性。方法选取2015年10月～2018年6月中山市人民医院新生儿科住院的60例HIE患儿及同期我院产科出生正常新生儿73例。应用流式细胞仪测定血CD3~+、CD4~+、CD8~+细胞及CD4~+/CD8~+比值。结果 HIE患儿T细胞亚群的表达均明显低于正常新生儿(P均<0.05);重度HIE患儿CD3~+、CD4~+细胞及CD4~+/CD8~+比值明显均低于中度HIE患儿(P均<0.05),中度HIE患儿CD3~+、CD4~+细胞及CD4~+/CD8~+比值明显均低于轻度HIE患儿(P均<0.05),而不同分度HIE的CD8~+细胞则无统计学差异(P> 0.05);CD3~+、CD4~+及CD4~+/CD8~+与HIE病情分度均呈负相关(P均<0.05)。结论 CD4~+/CD8~+比值与HIE新生儿的病情危重程度密切相关,可作为患儿病情严重程度的有效预测指标。     

CD4+与CD8+ T淋巴细胞在骨关节炎中作用的研究进展

骨关节炎是一种慢性、进行性、破坏性的关节炎性病变,常累及软骨及周围组织,最终可导致关节衰竭并伴有疼痛和残疾。许多证据表明免疫机制贯穿骨关节炎的发生发展,目前研究发现,CD⁺₄、CD⁺₈ T淋巴细胞介导的细胞免疫通过细胞分化、组织浸润、免疫亚群失衡以及释放不同的细胞因子,激活相关细胞通路,造成滑膜炎症、软骨丢失、降解、内稳态失衡以及软骨下骨重建等。现就CD⁺₄、CD⁺₈ T淋巴细胞在骨关节炎中作用的研究进展进行总结。     

In vitro susceptibility of CD4+ and CD8+ T cell subsets to fludarabine

Administration of the adenosine analogue fludarabine (FLU) in vivo induces a profound and prolonged T lymphopenia which mainly affects CD4(+) cells. To better understand the mechanistic basis underlying this preferential depletion, we analyzed the in vitro susceptibility of T cell subsets to FLU-induced apoptosis. Contrasting with observations in vivo, our results showed that treatment of peripheral blood mononuclear cells with FLU induced a higher level of apoptosis in CD8(+) than in CD4(+) T lymphocytes. This increased sensitivity of CD8(+) T cells to FLU was observed in samples from both, healthy donors and B cell chronic lymphocytic leukemia patients, and resulted in higher CD4:CD8 ratios in FLU-treated than in untreated cultures (P<0.01). Expression of factors involved in FLU transport and metabolism was then evaluated by quantitative real time-PCR in normal T cell subsets. It was found that mRNA levels of human equilibrative nucleoside transporter-1 nucleoside transporter were higher whereas deoxycytidine kinase and IMP/GMP selective 5'-nucleotidase mRNA levels were lower in CD4(+) cells. However the dCK/cN-II ratio was 2-fold greater in CD8(+) than in CD4(+) T lymphocytes, which could account for the higher apoptosis levels observed in the CD8(+) subset. These results favor the view that decreased CD4:CD8 ratios in FLU-treated patients should be attributed to differences in cell recovery and/or homing between T cell subsets.     

Induction of CD4+ regulatory T cells by TPA in mice: contra-suppression by CD8+ T cells

Among the eight inbred mouse strains employed in our preceding report, 12-O-tetradecanoylphorbol 13-acetate (TPA) painting alone induced CD4+ regulatory T (Tr) cells in four strains (e.g., C3H/He) at 6-8 weeks of age, but not in the remaining strains (e.g., C57BL/6, BALB/c). In the present study, the effect of growth from 4-14 weeks on delayed-type hypersensitivity (DTH) response was investigated in three inbred murine strains, C3H/He (H-2k), C57BL/6 (H-2b) and BALB/c (H-2d) mice. In all strains older than 10 weeks, DTH response was suppressed exclusively by TPA painting. The defect of suppressive activity for DTH in several of the strains at 6-8 weeks of age was dependent on the presence of cells, which blocked regulatory cell activity at 6-8 weeks of age, but not at 10 weeks of age. The age-dependent difference in regulatory activity was caused by the presence of CD8+ contra-regulatory T (Tcr) cells. CD8+ contra-regulatory T cells are required to contact regulatory cells in order to block DTH suppressive activity. Adhesion molecules were of great importance in contra-suppression, as antibody treatment to LFA-1 or ICAM-1 blocked this activity. ICAM-1 expression on CD4 T cells greatly increased following growth in 10 week-BALB/c mice receiving TPA than 6-week-old mice, however, a slight increase in growth occurred in 6-to-10-week-old animals in which TPA was absent. The degree of increment in body weight was very similar in these inbred strains. Thymus involution in C3H/He mice was the earliest signal among these mice. This result may suggest that the period of differentiation and maturation of T cells in a first lymphoid tissue for the growth process differs in these three inbred strains. This study provides an interesting example of genetic control of maturation or proliferation of peripheral T cells.     

Differential effect of sodium arsenite during the activation of human CD4+ and CD8+ T lymphocytes

Contamination of water with arsenic is a problem affecting several regions of the world. Peripheral blood mononuclear cells (PBMC) from chronically exposed individuals show a lower replicating activity than non-exposed individuals when stimulated with phytohemagglutinin (PHA). We have previously reported that PBMC from healthy donors treated in vitro with 1 muM sodium arsenite (NaAsO2) and stimulated with PHA showed a reduction in proliferation by a delay in cell cycle entry and a decrease in the rounds of cell division. In this paper we tested the effect of 1-5 muM NaAsO2 on the proliferation, viability, blast transformation, expression of the CD4 and CD8 molecules, and during the activation and proliferation of both CD4+ and CD8+ T lymphocytes. We found a reduction in cell proliferation and an increase in non-dividing cells with higher concentrations of NaAsO2 (2-5 microM) when proliferation was studied by 5,6-carboxyfluorescein diacetate succinimidyl ester (CFSE) dilution. The use of 7-aminoactinomycin D (7-AAD) in CFSE-labeled cells allowed us to detect an increase in percentage of non-dividing cells, and an increase in apoptotic/dead cells mainly in non-proliferating cells. Analysis of the expression of CD4 and CD8 molecules on these cells showed that concentrations > or = 2 microM NaAsO2 reduced the expression of the CD8 molecule and induced apoptosis/death in CD4+ cells. Analysis of blast transformation by flow cytometry showed an accumulation of CD8+ resting cells in the presence of NaAsO2. Analysis of CD25 and CD69 expression in kinetics experiments in both subtypes showed a delay in the expression of CD25 and a delay in the downregulation of the CD69 molecule, in both CD4+ and CD8+ cells. However, in the case of CD8+ cells, we detected an accumulation of a CD25- CD69- population in the presence of increasing concentrations of NaAsO2. Altogether, our results show that NaAsO2 alters the expression kinetics of the early activation molecules CD25 and CD69 similarly in both subtypes. In addition, activated and non-activated CD4+ cells die by apoptotic mechanisms and although a percentage of CD8+ cells also die by apoptosis, a subpopulation of these cells is unable to activate and thus accumulates as resting cells.     

CD8 blockade promotes the expansion of antigen-specific CD4+ FOXP3+ regulatory T cells in vivo

Treatment with a cocktail of CD4 and CD8-specific monoclonal antibodies (mAb) induces long-term transplantation tolerance and regulatory CD4(+) T cells that induce tolerance in non-tolerant T cells. In contrast, treatment with a CD4-specific mAb alone fails to induce long-term tolerance. The current study was designed to test the hypothesis that CD8 blockade plays a role in promoting the development of CD4(+) regulatory T cells. Using the DO11.10 CD4(+) TCR transgenic mouse model we show that treatment with a CD4/CD8-specific mAb cocktail induces antigen-specific tolerance to OVA, measured by a significant decrease in OVA-specific IgG, on challenge with antigen. Although treatment with OVA and the CD4-specific mAb alone also induces a significant decrease in OVA-specific antibody, the number of DO11.10 cells is significantly greater in mice treated with the CD4/CD8-specific mAb cocktail, and this is associated with a significant increase in proliferation of DO11.10 cells in response to specific antigen. DO11.10 cells sorted from mice made tolerant to OVA with the CD4/CD8-specific mAb cocktail promote an OVA-specific IgG1 (Th2-type) response but not an OVA-specific IgG3 (Th1-type) response on transfer into new syngeneic recipients, suggesting their ability to regulate the type of antigen-specific immune response that ensues after priming with antigen. In addition, DO11.10 cells from tolerant mice express markers that are characteristic of CD4(+) regulatory cells, including FOXP3, GITR and CTLA4, but not CD25. Taken as a whole, these data suggest that CD8 blockade promotes CD4(+) FOXP3(+) regulatory CD4(+) T cells by promoting their proliferation in tolerant mice.     

同种异体大鼠小肠移植中监测CD4+ T细胞和CD8+ T细胞数比值的意义

目的 探讨CD4+T细胞数/CD8+T细胞数作为大鼠同种异体小肠移植急性免疫排斥反应指标的可行性.方法 选取健康雄性成年SD、Wistar大鼠建立同种异体小肠移植模型,于大鼠术前和术后1、3、5、7、9d共6个时间段静脉取血,应用免疫荧光染色技术及流式细胞仪检测CD4+T细胞和CD8+T细胞百分率,并计算其比值.同期取移植小肠标本做组织学检测.结果 术后CD4+T细胞数和CD8+T细胞数比值前期增高后期降低.组织病理学检测发现术后小肠移植物的排斥反应由轻到重,术后第5天始CD4+T细胞数和CD8+T细胞数比值与急性免疫排斥反应程度呈正相关.结论 CD4+T细胞和CD8+T细胞数比值作为大鼠同种异体小肠移植术后急性免疫排斥反应的监测指标的可行性较大.     

艾滋病患者机会性感染与CD4^＋T细胞计数的关联分析

目的观察艾滋病患者治疗6个月内的机会性感染与CD4^＋ T细胞计数之间的关系。方法对136例患者在治疗6个月内机会性感染与CD^4＋ T细胞计数进行回顾性调查分析。结果治疗3个月内有87.5%（119/136）的患者CD4^＋ T细胞数≤200个/μl,治疗6个月内41.9%（57/136）的患者CD4^＋T细胞数≤200个/μl。初始治疗时CD4^＋ T细胞数≤200个/μl的136例中发生多种机会性感染82例,感染率为60.3%;治疗6个月时而CD4^＋ T细胞计数〉200个/μl的79例患者中,只有3例发生了机会性感染,其感染率3.8%。结论艾滋病患者在CD4^＋ T细胞数≤200个/μl时机会性感染出现频率较少,CD4^＋ T细胞数〈200个/μl〈200个/μl时机会性感染的频率明显增加;初始治疗时全部患者CD4^＋ T细胞数〈200个/μl,很容易发生各种机会性感染。