Increase in CD57 + CD16 - lymphocytes in workers exposed to benzidine and beta-naphthylamine: assessment of natural killer cell subpopulations

Previously, we found a decrease in CD4+CD45RA+T lymphocytes in workers exposed to the aromatic amines (AAs) [benzidine (BZ) and beta naphthylamine (BNA)]. For further investigation of the effects of AAs on lymphocyte subpopulations, we measured natural killer (NK) cell subpopulations using two-color staining with anti-Leu7 (CD57) and anti-Leu11 (CD16) monoclonal antibodies in peripheral blood in 78 male dyestuff workers. The workers had been exposed to AAs before 1972 at a chemical plant, either in the production of AAs (40 workers, high-exposure group) or in other work that involved handling dye-stuffs (38 workers, low-exposure group). The controls were 30 “healthy” male volunteers without a history of occupational exposure to AAs or hazardous chemicals. The number of CD57+CD16-cells in the high-exposure group was significantly higher than that in the controls (P<0.01, analysis of covariance with age as a covariate). No significant differences were found in CD57+CD16-, CD57+CD16+ and CD57-CD16+NK cells between the low-exposure group and the controls. It is suggested that a decrease in the number of CD4+ T lymphocytes following exposure to AAs might be compensated by the increase in CD57+CD16- cells, i.e. circulating peripheral lymphocytes with poor NK cell activity.     

Decreases of CD4- and CD8-positive T lymphocytes in retired chromate workers

To investigate the effects of chromates on the human immune system, we measured total T lymphocytes and their two major subpopulations (CD4 + and CD8 + T lymphocytes) in the peripheral blood of 19 retired male workers who had been exposed to chromate at a chemical plant. The results indicated that both CD4 + and CD8 + T lymphocytes were significantly decreased, resulting in decreases in total T lymphocytes and total lymphocytes.     

足月妊娠分娩发动前后孕妇蜕膜中NK细胞及CD4~+CD25~+T细胞的变化

目的:检测足月妊娠分娩发动前后孕妇蜕膜中NK细胞及CD4+CD25+T细胞的变化情况,探讨它们与分娩发动的关系。方法:对40例健康足月孕妇按临产情况分为足月未临产组和足月临产组,收集孕妇蜕膜组织,密度梯度离心法分离出淋巴细胞,流式细胞术(FCM)检测两组中NK细胞、CD4+CD25+T细胞含量。结果:足月临产组的蜕膜NK细胞占蜕膜淋巴细胞的(36.3±6.5)%,足月未临产组蜕膜NK细胞占蜕膜淋巴细胞的(33.9±3.0)%,差异无统计学意义;足月临产组的蜕膜NK细胞表面CDl6的表达明显高于足月未临产组,两者分别为(8.9±1.1)%与(4.6±0.9)%(P<0.05);足月临产组的蜕膜CD4+CD25+T细胞含量明显小于足月未临产组CD4+CD25+T细胞的含量,两者分别为(4.5±0.7)%与(9.1±1.0)%(P<0.05)。结论:足月妊娠分娩发动前、后蜕膜中的NK细胞及CD4+CD25+T细胞发生变化,推测NK细胞与CD4+CD25+T细胞可能参与了分娩发动。     

HIV感染者抗病毒治疗前后CD3+CD4+T及NK/NKT细胞变化的临床意义

目的 了解HIV感染者抗病毒治疗前后不同时期CD3+CD4+T和NK/NKT细胞的变化,探讨CD3+CD4+T、NK/NKT细胞作为抗病毒治疗后评价免疫状况指标的临床意义。方法 采用重复测量资料方差分析对40个HIV 感染者抗病毒治疗前、治疗后6个月和12个月的CD3+CD4+T、NK、NKT细胞绝对计数差异进行比较,分析治疗前后CD3+CD4+T细胞计数与NK、NKT细胞计数的相关性。结果 感染者不同时间测得的CD3+CD4+T细胞数量差异有统计学意义（F =68.16,P <0.001）,两两比较差异均有统计学意义（P <0.001）。NK和NKT细胞计数三次测量结果差异有统计学意义（F =10.701,P <0.001;F =44.177,P <0.001）,两两比较发现治疗前分别和治疗后6个月、12个月的绝对计数差异有统计学意义（P <0.001）;CD3+CD4+T与NK、NKT细胞绝对计数的相关性不具有统计学意义。结论 经过1年抗病毒治疗后,CD3+CD4+T淋巴细胞有明显的提高,提示患者免疫状况显著改善。NK和NKT细胞在前6个月增加明显,6个月到12个月期间无明显增加,说明NK和NKT细胞在早期抗病毒中同样发挥了重要作用。NK/NKT细胞的变化可以评价患者治疗后天然免疫状况,但与获得性免疫的CD3+CD4+T淋巴细胞变化没有相关性。     

手术前后卵巢癌患者外周血T细胞亚群及CD4~+CD25~+调节性T细胞表达及临床意义

目的:探讨手术前后卵巢癌患者外周血T细胞亚群及CD4+CD25+调节性T细胞的变化及其临床意义。方法:采用流式细胞术检测80例卵巢癌患者外周血T淋巴细胞亚群、NK细胞及CD4+CD25+调节性T细胞水平。结果:与对照组相比,卵巢癌患者外周血中CD3+,CD4+,CD4+/CD8+比值及NK细胞含量均降低(P0.05),CD8+升高(P0.05);随着疾病进展Ⅲ期+Ⅳ期与Ⅰ期+Ⅱ期比较CD3+,CD4+,CD4+/CD8+比值及NK细胞含量均降低(P0.05),CD8+升高(P0.05)。卵巢癌患者外周血CD4+CD25+细胞比例高于正常对照组(P0.05);手术后卵巢癌患者T细胞亚群比例与术前比较并未明显恢复(P0.05),但CD4+CD25+调节性T细胞水平有所恢复(P0.05)。结论:卵巢癌患者免疫功能低下,术后短期并不能恢复,CD4+CD25+调节性T细胞水平升高,术后明显恢复,提示其在免疫耐受中起重要作用。     

Immunologic findings among lead-exposed workers

A comprehensive panel of immune parameters was evaluated among 145 lead-exposed workers with a median blood lead level (BLL) of 39 μg/dL (range: 15–55 μg/dL) and 84 unexposed workers. After adjusting for covariates, we found no major differences in the percentage of CD3+ cells, CD4+ T cells, CD8+ T cells, B cells, or NK cells between lead-exposed and unexposed workers, although the association between lead exposure and the number of CD4+ T cells was modified by age. We also found no differences between exposed and unexposed workers in serum immunoglobulin levels, salivary IgA, C3 complement levels, or lymphoproliferative responses. However, among exposed workers, the percentage and number of B cells were positively associated with current BLL, serum IgG was negatively associated with cumulative lead exposure, and the percentage and number of CD4+/CD45RA+ cells were positively associated with cumulative lead exposure. We found no evidence of a marked immunotoxic effect of lead at the exposure levels studied, although some subtle differences in immunologic parameters were noted. Am. J. Ind. Med. 33:400–408, 1998. Published 1998 Wiley-Liss, Inc.

1 This article is a US Government work and, as such, is in the public domain in the United States of America.

     

Decreases in CD8+ T, naive (CD4+CD45RA+) T, and B (CD19+) lymphocytes by exposure to manganese fume

To examine the effects of exposure to manganese (Mn) on the cellular and humoral immune system in men, T lymphocyte subpopulations, B (CD19+) lymphocytes, natural killer (NK) cells, and serum immunoglobulins (i.e., IgG, IgA and IgM) together with total T (CD3+) lymphocytes and total lymphocytes were measured in blood samples from 21 welders mainly exposed to Mn fume with blood Mn (BMn) concentrations of 0.6-2.3 (mean 1.4) microg/dl and 21 healthy controls working in the same factory (BMn concentrations: 0.7 to 1.7, mean 1.1 microg/dl). The workers engaged in welding for 6 to 36 (mean 17) yr. All the study subjects were divided into 3 equally sized groups (n=14 for each group) according to BMn concentrations. Numbers of CD8+ T, total T (CD3+), B (CD19+), and total lymphocytes were significantly lower in high-BMn group than those in low-BMn group; the numbers of CD8+ T lymphocytes were significantly lower in moderate-BMn group compared to low-BMn group. After adjusting for age and smoking, significant inverse correlations between BMn concentrations and CD4+CD45RA+ T, CD4+ T, CD8+ T, CD3+ T, and total lymphocytes were found. We conclude that T lymphocytes, especially CD8+ and CD4+CD45RA+ T lymphocytes, as well as CD19+ B lymphocytes are affected by exposure to Mn fume.     

HCV感染者和HCV/HIV合并感染者免疫调节

目的　探讨我国单纯丙型肝炎病毒(HCV)感染者和HCV/HIV合并感染者免疫应答的相关机制。方法　分离人外周血单个核细胞;流式细胞仪(FACS)检测CD4 + T细胞和CD4 + CD2 5 + T细胞表达水平。结果　CD4 +CD2 5 + T细胞占外周血单个核细胞中CD4 + T细胞比例(%CD4 + CD2 5 + ) ,HCV感染组明显高于健康对照组(19. 2 %>13 8% ,P <0 . 0 5 ) ,HCV/HIV合并感染组明显低于对照组(6. 9% <13. 8% ,P <0 .0 0 1) ,更明显低于HCV感染组(P <0 . 0 0 1)。结论　HCV感染者体内CD4 + CD2 5 + T细胞增殖明显,提示CD4 + CD2 5 + T细胞在HCV慢性感染中发挥免疫调节作用。HCV/HIV合并感染时,CD4 + CD2 5 + T细胞受损,从而影响免疫调节功能。     

病毒学抑制的HIV - 1感染者免疫衰老相关CD4+T淋巴细胞亚群的分析

目的 了解病毒学抑制的HIV - 1感染者CD4+ T淋巴细胞免疫衰老状态,探索主成分分析法能否用于评价HIV - 1患者的免疫衰老。方法 选择抗逆转录疗法治疗半年以上成年病毒学抑制HIV - 1感染者,根据CD4+T淋巴细胞计数结果分为CD4无缺陷组（≥500个/μl）和缺陷组（＜500个/μl）,每组65人,另选择22名未暴露且HIV - 1抗体检测阴性者作为对照组,采用流式细胞仪检测其CD4+T淋巴细胞（CD45RA+CD27+）、活化CD4+T淋巴细胞（HLA - DR+CD38+）和复制性衰老CD4+T淋巴细胞（CD57+CD28-）水平,运用主成分分析对三种细胞进行综合分析。结果 缺陷组（27.64%）和无缺陷组（32.04%）的初始CD4+T淋巴细胞较对照组（51.27%）有明显下降（F = 24.35,P＜0.001）,活化CD4+T淋巴细胞（14.26%,13.03%）较对照组（2.35%）有明显上升（F = 19.75,P＜0.001）;缺陷组（12.64%）的复制性衰老CD4+T淋巴细胞较无缺陷组（7.36%）和对照组（3.58%）有明显升高（F = 6.68,P = 0.002）,而无缺陷组和对照组之间无统计学差异;主成分分析能区分出三组对象CD4+T淋巴细胞免疫衰老的差异程度:缺陷组＞无缺陷组＞对照组（F = 20.787,P＜0.001）。结论 病毒学抑制良好的HIV - 1感染者即使CD4+T细胞数量正常也表现为免疫衰老,CD4+T细胞数量异常的人免疫衰老状态更严重,可运用主成分分析对病毒学抑制的HIV - 1感染者免疫衰老相关细胞进行综合分析。     

内蒙古新发现HIV感染者首次CD4~+T淋巴细胞检测分析

目的:通过对内蒙古地区新发现的HIV感染者首次CD4+T淋巴细胞进行检测分析,了解其免疫状况及疾病进展情况。方法:采用流式细胞术对采集的全血样本进行CD4+T淋巴细胞绝对值检测,统计分析其测定值。结果:能随访到的182例HIV感染者CD4+T淋巴细胞绝对值的均值为(459.85±240.21)个/μl。不同年龄组HIV感染者间CD4+T淋巴细胞绝对值差异具有统计学意义(F=9.509,P=0.0001**<0.05),且随年龄增长CD4+T淋巴细胞绝对值具有下降趋势。结论:内蒙古新发现HIV感染者中1/3已进入艾滋病期,需要监测疾病进程并及时对其进行抗病毒治疗。加强宣传,早发现、早干预、早管理,以提高HIV感染者的生存质量。     

吸毒人群外周血CD4~+CD25~+调节性T细胞和免疫功能变化及意义

目的通过测定不同吸毒方式的吸毒人群外周血中CD4+CD25+调节性T细胞(regulatoryTcell,Treg)的变化,从免疫调节方面探讨吸毒对人体免疫功能的影响以及机体的调节功能改变。方法清晨空腹抽取静脉血,采用流式细胞仪同期测定吸毒组和正常对照组人群CD4+CD25+Treg细胞和CD4+CD25+Foxp3Treg细胞及CD8+T淋巴细胞、CD4+T淋巴细胞的表达。结果口吸组和静脉注射组调节性T细胞与正常对照组比较,差异有统计学意义(LSD-t=2.34,4.35,P﹤0.05),静脉注射组和口吸组CD4+CD25+、CD4+CD25+Foxp3Treg细胞相比差异有统计学意义(LSD-t=3.37,4.07,P﹤0.05);不同吸毒途径淋巴细胞CD4+、CD8+表达不同,与对照组比较口吸组、静脉注射组CD4+和CD8+T淋巴细胞差异有统计学意义(LSD-t=5.18,4.94,2.17,2.23,P﹤0.05)。结论吸毒人群CD4+CD25+调节性T细胞功能代偿升高和不同吸毒方式导致机体免疫功能受损程度也不同。     

大鼠上皮性卵巢癌动物模型CD4~+CD25~+调节性T细胞的变化

目的:为明确CD4+CD25+调节性T细胞与上皮性卵巢癌的关系,探讨上皮性卵巢癌中CD4+CD25+调节性T细胞的变化、来源以及CD4+CD25+调节性T细胞对上皮性卵巢癌免疫功能的影响。方法:应用Fischer 344大鼠建立上皮性卵巢癌动物模型,应用流式细胞仪和RT-PCR方法检测大鼠胸腺和脾脏中CD4+CD25+调节性T细胞的变化。结果:上皮性卵巢癌大鼠动物模型脾脏T淋巴细胞功能增强,CD4+CD25+调节性T细胞占CD4+T细胞比例及FOXP3 mRNA表达较正常大鼠均明显增加,而胸腺无明显改变。结论:提示上皮性卵巢癌由外周诱导导致CD4+CD25+调节性T细胞占CD4+T细胞比例增加,表达增强。     

Decrease of suppressor-inducer (CD4+ CD45RA) T lymphocytes and increase of serum immunoglobulin G due to perceived job stress in Japanese nuclear electric power plant workers

To clarify the effects of perceived job stress on the immune system, a cross-sectional study was conducted in 116 male Japanese workers of a nuclear electric power plant (age, 20 to 39; mean, 31 years). Perceived job stress, i.e., psychological job demand, job control, worksite social support, and job strain, was assessed by means of the Japanese version of the Job Content Questionnaire. The job strain score was calculated as the ratio of the job demand score to the job control score. Blood samples were taken from all workers, and numbers of T and natural killer cell subpopulations, B lymphocytes, total lymphocytes and white blood cells, and serum concentrations of immunoglobulins (IgG, IgM, IgA, IgE and IgD) in their blood were measured. The workers were divided into higher and lower strain groups according to their job strain scores. The number of CD4+ CD45RA+ T lymphocytes in the higher strain group having the job strain score of 0.5 or more (41 workers) was significantly smaller than that in the lower strain group having the score of less than 0.5 (75 workers). In contrast, the serum IgG concentration in the former group was significantly higher than that in the latter group (analysis of covariance with age and smoking as covariates). Also, the numbers of total CD4+ T and total T (CD3+) lymphocytes and of white blood cells in the former group were significantly smaller than those in the latter group. After controlling for age and smoking by the partial correlation coefficient in all 116 workers, the number of CD57+ CD16+ natural killer cells was inversely correlated with job demand and with job strain; the number of CD8+ T lymphocytes was positively correlated with worksite social support; and serum IgG and IgM concentrations were positively correlated with job strain. It is suggested that higher job strain decreases the number of CD4+ CD45RA+ T lymphocytes in male Japanese workers but increases serum IgG concentrations.     

Development of a novel ZIKV vaccine comprised of immunodominant CD4+ and CD8+ T cell epitopes identified through comprehensive epitope mapping in Zika virus infected mice

Zika virus (ZIKV) caused over two million human infections in more than 80 countries around 2015–2016. Current vaccines under development are mostly focused on inducing antibodies that despite capable of inhibiting the virus, may have the potential to trigger antibody dependent enhancement (ADE). T cell vaccines that do not induce antibodies targeting viral surface will unlikely cause ADE, but be capable of potentiating the effectiveness of an antibody-inducing vaccine. To develop such a protective T cell vaccine, we first examined the repertoire of antigen-specific T cells in immunocompetent mice that have been transiently infected by ZIKV. Through epitope mapping using 427 overlapping peptides spanning the entire length of ZIKV polyprotein, we discovered 27 immunodominant epitopes scattered throughout the virus on C, E, NS1-NS5 proteins. Among them, 8 were confirmed as CD4+ T cell epitopes, and 16 as CD8+ T cell epitopes, while 3 for both T cell subsets. From these 27 newly identified epitopes, the top 10 epitopes were selected to formulate three T cell vaccines comprised of either CD4+ T cell epitopes, or CD8+ T cell epitopes, or a mixture of both. Immunization with these T cell epitopes induced T cell-mediated cytotoxicity and cytokine production, and conferred varying degrees of protection against ZIKV challenge. Moreover, these new T cell vaccines also improved the protective efficacy of a neutralizing antibody-inducing recombinant E80 protein vaccine. Together, our results provided additional evidence in support of the protective role of ZIKV-specific CD4+ and CD8+ T cells, and laid foundation for future development of T cell vaccines for ZIKV.     

CD4~+ T淋巴细胞内ATP含量与膀胱癌复发相关性的研究

目的:探讨CD4+T淋巴细胞内三磷酸腺苷(adenosine triphosphate,ATP)含量与膀胱癌术后复发的关系。方法:本研究采集67例膀胱癌患者(非复发53例,复发14例)及53名健康志愿者的外周血标本,用ImmuKnowTM免疫细胞功能测定试剂盒检测CD4+T淋巴细胞内ATP值。结果:健康对照组、非复发组、复发组的CD4+T淋巴细胞内ATP含量分别为(449±116)ng/ml(、298±101)ng/ml(、141±98)ng/ml;复发组和非复发组的CD4+T淋巴细胞内ATP值显著低于健康对照组(P<0.01),复发组的ATP含量显著低于非复发组(P<0.01),ATP值降低(<142ng/ml)时膀胱癌复发的风险增加。结论:CD4+T淋巴细胞内ATP含量与膀胱癌术后复发有良好相关性,监测膀胱癌术后患者的上述指标对评估其免疫状态、制定个体化治疗方案,预防复发具有良好的指导作用。     

CD4~+ CD25~+调节性T细胞在HIV/AIDS患者中的作用及其与HIV病毒载量的相关性研究

目的研究HIV感染者/AIDS患者外周血CD4~+CD25~+调节性T细胞(CD4~+CD25~+ regulatory T cell,Treg)频率、功能及其临床意义。方法选择31例HIV感染者/AIDS患者和30例健康对照者,采用流式细胞仪检测各组外周血Treg的表型和频率。采取MACS磁珠分选Treg,利用[~3H]胸腺嘧啶掺入法检测Treg在特异性HIV抗原刺激下对CD4~+CD25~+T细胞的增殖影响。结果HIV/AIDS患者组与正常对照组相比较,外周血CD4~+CD25~+调节性T细胞在统计学上无显著性意义。与正常对照组比较,HIV感染者外周血Treg比例升高,差异有统计学意义(P<0.01);与正常对照组比较,AIDS患者外周血Treg比例降低,差异有统计学意义(P<0.0001)。HIV RNA病毒载量与患者外周血Treg细胞数量呈正相关性(P<0.01)。Treg具有抑制HIV特异性的CD4~+CD25~- T细胞的增殖作用。结论HIV感染者/AIDS患者的细胞免疫功能紊乱,Treg能抑制HIV感染者/AIDS患者的HIV特异性细胞免疫反应,促进HIV病毒复制,与形成持续HIV感染有关。     

肺结核患者外周血CD4~+CD25~+调节性T细胞的检测及意义

[目的]通过对肺结核患者外周血中CD4+CD25+调节性T细胞的分析,探讨其在肺结核患者中的临床意义。[方法]采用流式细胞技术多色荧光分析法,测定84例肺结核患者及29例健康体检者外周血中CD4+CD25+调节性T细胞水平,观察肺结核患者与健康对照者之间、各型肺结核之间及结核杆菌阳性与阴性者之间的差别。[结果]肺结核患者CD4+CD25+所占比例为(10.81±2.65)%,与健康对照组差异有统计学意义(P0.05);各型结核之间、抗酸杆菌阳性与阴性之间的差异有统计学意义(P0.05);初治肺结核与复治肺结核也有一定的差异,但无统计学意义(P0.05)。[结论]CD4+CD25+调节性T细胞可作为判断肺结核患者免疫功能的指标,它对肺结核患者的免疫状态、指导用药、疗效观察有一定的临床意义。     

Association of low job control with a decrease in memory (CD4+ CD45RO+) T lymphocytes in Japanese middle-aged male workers in an electric power plant

To clarify the relationship between perceived job stress and lymphocyte subpopulations, a cross-sectional study was conducted in 231 male electric power plant workers (aged 40 to 60, mean 46 years). Job stress, i.e., job control, job demands, and social support at work, was assessed by means of the Japanese version of the Job Content Questionnaire. Blood samples were taken from all the workers, and numbers of CD4+ T lymphocyte subpopulations, total CD4+ T, T (CD3+) lymphocytes, CD16CD56+ natural killer (NK) cells, total lymphocytes, and white blood cells were determined. After controlling for age, number of cigarettes smoked per day, alcohol drinking, frequency of regular exercise, job demands, and social support at work by the partial correlation coefficients, numbers of memory (CD4+ CD45RO+) T, total CD4+ T, and total T (CD3+) lymphocytes were positively correlated with job control (p<0.05). Neither job demands nor social support at work showed significant correlations with lymphocyte subpopulations. It is suggested that lower job control is associated with a decrease in the number of CD4+ CD45RO+ T lymphocytes in male middle-aged workers.     

Effects of mercury vapor exposure on neuromotor function in Chinese miners and smelters

Objectives Current risk assessment of elemental mercury vapor is based on the tremor toxicity. To clarify the neuromotor effects of occupational exposure to mercury vapor, hand tremor and postural sway were measured in 27 miners and smelters (i.e., exposed workers) and 52 unexposed subjects. Methods Urine samples were collected and total mercury and creatinine concentrations were determined. Data of the tremor and postural sway were analyzed using the fast Fourier transformation. Results The geometric means of the urinary mercury level (UHg) were 228 (range 22.6–4,577) μg/g creatinine for the exposed workers and 2.6 (1.0–17.4) μg/g creatinine for the unexposed subjects. Total tremor intensity and frequency-specific tremor intensities at 1–6 and 10–14 Hz were significantly larger in the exposed workers than in the unexposed subjects (P < 0.05), but they were not significantly related to the UHg among the exposed workers (P > 0.05). In contrast, there were no significant differences in any postural sway parameters between the above two groups (P > 0.05), but the transversal sway with eyes open was positively related to the UHg among the exposed workers in using multiple regression analysis (P < 0.05). Conclusions These findings suggest that postural sway, as well as hand tremor, may be affected by elemental mercury vapor exposure, but the former test seems to be less sensitive to mercury than the latter one.     

实验性抗磷脂综合征小鼠CD4~+CD25~+调节性细胞及foxp3表达的变化

目的:观察实验性抗磷脂综合征(experimental anti-phospholipid antibody syndrome,EAPS)进展过程中小鼠CD4+CD25+调节性T细胞(CD4+CD25+Treg)数量和功能变化。方法:以重组人β2糖蛋白1(rhβ2GP1)主动免疫BALB/c小鼠建立实验性APS模型,免疫12周后检测抗β2糖蛋白1抗体(anti-β2-GP1)、抗心磷脂抗体(ACA)、流产率(%)、活化部分凝血活酶时间(aPTT)、血小板计数(PLT PBC)。以流式细胞术检测小鼠PBMC中CD4+CD25+Treg细胞频率,RT-PCR检测转录因子Foxp3 mRNA的表达水平。结果:模型小鼠anti-β2-GP1、aCL水平明显升高,aPTT延长,PLT PBC降低,流产率提高,差异有统计学意义(P0.05)。模型小鼠PBMC中foxp3基因表达在4周短暂高于对照组(P0.05),8周后随着APS进展开始逐渐降低,12周后明显低于对照组(P0.05)。PBMC中CD4+CD25+Treg细胞频率8周前与对照组相比差异无统计学意义(P0.05),12周后逐渐减少,明显低于对照组(P0.05)。结论:CD4+CD25+Treg数量和功能下降参与抗磷脂综合征的发病机制。