胃癌患者手术前后CD4+CD25+调节性T细胞的变化

目的 研究胃癌患者手术前、后调节性T细胞(Treg)及FoxP3表达的变化.方法 采用流式细胞术检测20例胃癌患者术前及其中15例接受了手术者术后1周(简称术后)以及15例因胃部不适接受胃镜检查的自愿者(正常对照组)外周血中Treg数量的变化,用RT-PCR法检测Treg的特异性分子标志物FoxP3的转录水平,同时用免疫组织化学法检测胃癌组织中FoxP3蛋白的表达情况.结果 胃癌患者术前外周血中CD4+T细胞中的CD4+ CD25+比例明显高于正常对照组[(19.39±5.58)%比(9.91±3.23)%,P＜0.01],而术后CD4+ CD25+比例较术前明显下降[(13.50±5.93)%比(19.39±5.58)%,P＜0.05].胃癌患者术前外周血中FoxP3转录水平明显高于正常对照组(0.86±0.03比0.64±0.02,P＜0.01),而术后较术前明显下降(0.73±0.04比0.86±0.03,P＜0.05),提示FoxP3转录水平与Treg变化一致.胃癌患者外周血中CD4+T细胞在单个核细胞中的比例与正常对照组相比明显下降(P＜0.01),而手术前、后变化不明显.20例胃癌患者中13例胃癌癌细胞的细胞浆中有不同程度的FoxP3蛋白表达(强阳性2例,中阳性6例,弱阳性5例),7例胃癌患者的胃癌细胞中不表达.结论 Treg可能通过免疫抑制作用在胃癌的发生、发展中发挥作用,肿瘤组织本身可能是引起Treg变化的重要始动因素.     

胃癌患者外周血调节性T细胞检测及初步分析

目的 检测胃癌患者外周血调节性T细胞(Treg)水平并对其进行初步分析.方法 四色流式细胞仪检测术前胃癌患者(n=25)及正常健康者(n=25)外周血CD4+ CD25+ FOXP3+Treg水平.结果 正常对照组CD4+ CD25+ FOXP3+ Treg/PBL为(1.229±0.656)%,胃癌组CD4+ CD25+ FOXP3+ Tres/PBL为(1.993±0.830)%.胃癌患者外周血Treg较正常对照组明显升高(P<0.01).结论 胃癌患者周血Treg水平升高,可因其免疫负调作用而导致免疫抑制.     

胰十二指肠切除术对胰头癌患者CD4~+CD25~+调节性T细胞的影响及临床意义

目的研究胰头癌患者外周血中CD4+CD25+调节性T细胞(Treg)比例及其在手术前、后的变化趋势。方法采用流式细胞仪检测胰头癌患者及正常对照组外周血中CD4+CD25+调节性T细胞的数量,同时监测CD4+/CD8+比值,并进行手术前、后的比较。结果胰头癌患者术前外周血中CD4+CD25+和CD4+CD25highTreg所占比例较正常对照组高(P<0.05),术后则出现不同程度下降,以术后第3天下降最明显(P<0.01,P<0.05);胰头癌患者术后CA19-9水平低于术前,以术后第14天下降明显(P<0.05)。CD4+CD25highTreg与CA19-9的变化趋势大致相同。胰头癌患者术前CD4+/CD8+比值比正常对照组低(P<0.05),手术后进一步降低,于手术后第7天达最低(P<0.05)。结论胰十二指肠切除术可能有助于机体抗肿瘤免疫的恢复,胰头癌患者围手术期可作为免疫干预的重要窗口期,CD4+CD25+调节性T细胞可作为免疫干预的靶点。     

胃癌患者CD4+CD25+Foxp3+调节性T细胞与TGF-β1检测的意义

目的:探讨胃癌患者外周血CD4+CD25+Foxp3+调节性T细胞(CD4+CD25+Foxp3+Tergs)以及血清TGF-β1水平的变化及意义。方法:检测并比较42例胃癌患者(胃癌组)与24例健康体检者(对照组)外周血CD4+CD25+Foxp3+Tergs与血清TGF-β1水平,分析两者水平与胃癌患者临床病理因素的关系。结果:胃癌组CD4+CD25+Foxp3+Tergs和TGF-β1水平均明显高于对照组(均P<0.05)。胃癌患者外周血CD4+CD25+Foxp3+Tergs水平与TNM分期、淋巴结转移有关(均P<0.05),而血清TGF-β1的表达水平与TNM分期、分化程度、淋巴结转移有关(均P<0.05);胃癌组患者外周血内CD4+CD25+Foxp3+Tergs的表达水平与血清内TGF-β1的表达水平呈明显正相关(r=0.801,P<0.05)。结论:胃癌患者外周血CD4+CD25+Foxp3+Tergs水平及血清TGF-β1水平升高,检测两者水平有助于患者病情与预后的判断。     

不同分期前列腺癌患者外周血CD4~+ CD25~+ Foxp3~+调节性T细胞的变化及与胰岛素抵抗的相关性

目的 :观察不同分期前列腺癌患者外周血单个核细胞CD4+CD25+Foxp3+调节性T细胞的变化及与胰岛素抵抗的关系。方法:采用流式细胞术检测62例前列腺癌患者(患者组,临床TNM分期Ⅰ期5例、Ⅱ期16例、Ⅲ期21例、Ⅳ期20例)外周血单个核细胞(PBMC)中CD4+CD25+Foxp3+调节性T细胞数目,计算CD4+CD25+Foxp3+调节性T细胞占CD4+T淋巴细胞的百分率;并检测其空腹胰岛素及空腹血糖水平,计算胰岛素抵抗指数(HOMA-IR);采用ELISA法测定外周血胰岛素样生长因子1(IGF-1)水平,分析CD4+CD25+Foxp3+调节性T细胞与胰岛素抵抗的相关性,并与42例健康体检者进行对照。结果:与健康对照组相比,前列腺癌患者HOMAIR明显升高(6.68±1.66 vs 3.68±1.42),IGF-1水平明显下降[(96.39±21.21)ng/ml vs(164.56±30.58)ng/ml],PBMC CD4+CD25+Foxp3+Treg占CD4+T淋巴细胞的百分率[(13.88±0.96)%vs(5.33±0.65)%]及CD4+CD25+Foxp3+Treg绝对值[(3.55±0.29)×107vs(1.99±0.78)×107]明显升高(P0.05,P0.01)。患者PBMC CD4+CD25+Foxp3+Treg占CD4+T淋巴细胞的百分率及CD4+CD25+Foxp3+Treg绝对数﹑HOMA-IR均随TNM分期逐渐加重而增加,IGF-1逐渐下降;相关性分析表明:CD4+CD25+Foxp3+Treg/CD4+T及CD4+CD25+Foxp3+Treg绝对数均与HOMA-IR呈明显正相关(r分别为0.689、0.722,P0.01),与IGF-1呈明显负相关(r分别为-0.896、-0.747,P0.01)。结论:前列腺癌患者存在不同程度的胰岛素抵抗,且随着疾病程度的加重,外周血CD4+CD25+Foxp3+调节性T细胞数目和比例及胰岛素抵抗逐渐加重;CD4+CD25+Foxp3+调节性T细胞可能通过调节胰岛素抵抗参与其形成和发展。     

肝癌患者外周血CD4~+CD25~+调节性T细胞的变化及其意义

目的 探讨应用流式细胞术检测肝癌患者外周血中CD4~+CD25~+调节性T细胞的变化及意义.方法 应用三色免疫荧光流式细胞仪测定37例肝癌患者及30例肝硬化患者外周血T细胞亚群CD4~+CD25~+/CD~+比值.采用酶联免疫吸附试验(ELISA)法检测外周血中转化生长因子β1(TGF-B1)的表达水平.结果 肝癌患者外周血CD4~+CD25~+/CD4~+比值较肝硬化患者显著增高,两者比较差异有统计学意义(P<0.05);肝癌患者外周血中CD4~+CD25~+T细胞水平与肝癌原发肿瘤的大小、TGF-βl呈正相关(P<0.05).结论 肝癌患者外周血中CD4~+CD25~+调节性T细胞增多,对肝癌患者具有免疫抑制作用.     

肾移植患者术后外周血CD4+CD25+调节性T细胞的检测及其与瘦素水平的相关性

目的:了解肾移植患者术后外周血中CD4 CD25 调节性T细胞的比例和瘦素水平的变化及其临床意义,探讨CD4 CD25 调节性T细胞与瘦素水平的相关性。方法:应用放射免疫方法检肾移植患者及健康对照者外周血中瘦素的水平,流式细胞术检测外周血中CD4 CD25 调节性T细胞占CD4 T细胞的比例。结果:移植近期组(1年)与对照组患者血浆中瘦素浓度比较无差异,但移植远期组的瘦素浓度(2.5年)高于对照组和移植近期组。且外周血中CD4 CD25 调节性T细胞的比例与瘦素呈显著负相关(r=-0.83,P<0.01)。结论:肾移植术后的远期高瘦素血症可能对CD4 CD25 调节性T细胞具有负性调节作用,也许不利于移植耐受的维持。     

原发性肝癌患者体内的CD4+CD25+ T细胞变化及其意义

目的:探讨原发性肝细胞癌(HCC)患者体内CD4+CD25+T细胞变化的及其意义。 方法:实验分HCC组（n=20）与正常人对照组(n=10)，采用免疫荧光标记法，流式细胞仪分离出外周血CD4+CD25+T细胞，分析两组CD4+CD25+T细胞所占T细胞的比例。计算并比较癌组织与癌旁组织中CD4+CD25+T细胞所占T细胞的比例。结果:HCC组机体的CD4+CD25+T 细胞比例为(19.3±3.0) %，明显高于对照组(5.2±1.6) % (P<0.05)。癌组织中CD4+CD25+T 细胞比例为(6.5±2.9) %，癌旁组织中CD4+CD25+T 细胞比例为(5.8 ±2.1) %， (P>0.05)。结论:原发性肝细胞癌患者机体免疫功能降低的原因之一可能是外周血CD4+CD25+T 细胞数明显增加。     

Ⅲ型前列腺炎患者外周血中CD4+CD25+Treg及前列腺液中MCP-1的检测及意义

目的 探讨Ⅲ型前列腺炎/慢性骨盆底疼痛综合征(CAP/CPPS)患者外周血中CD4+CD25+调节性T细胞占CD4+T细胞的比率以及检测其前列腺液(EPS)中单核细胞趋化蛋白-1(MCP-1)的水平,分析各检测指标与临床症状的相关性.方法 采用流式细胞仪检测48例CAP/CPPS患者和10例正常对照者外周血CD4+CD25+Treg占CD4+T淋巴细胞的百分比;ELISA法检测两组受试者EPS中MOP-1水平.结果 CAP/CPPS组外周血中CD4+T细胞及CD4+CD25highTreg/CD4+T细胞(28.12±4.32)%,(3.99±0.61)%与对照组(28.29±4.30)%(3.96±0.66)%相比;差异无统计学意义,P>0.05.Ⅲ a组外周血中CD4+T细胞及CD4+CD25highTreg/CD4+T细胞(28.33±4.35)%,(3.98±0.60)%与Ⅲb组(27.91±4.26)%(4.01±0.62)%相比;P>0.05.Ⅲ型组CD4+CD25+Treg/CD4+T细胞(6.48±1.34)%,低于对照组(14.66±2.16)%;P<0.01.CAP/CPPS组外周血中CD4+T细胞以及CD4+CD25hignTreg/CD4+T细胞与患者慢性前列腺炎症状指数评分(CPSI)均无相关性(P>0.05):CD4+CD25+Treg/CD4+T细胞与患者疼痛评分呈负相关(r=-0.702,P<0.05).CAP/CPPS组外周血中CD4+CD25+Treg/CD4+T细胞与EPS中MCP-1水平呈负相关(r=-0.682,p>0.05).CAP/CPPS患者前列腺液中MCP-1(0.45±0.09)ng/ml较对照组(0.18±0.02)ng/ml显著升高;P<0.01.Ⅲ a组EPS中MCP-1水平(0.54±0.02)ng/ml较Ⅲb组(0.35±0.02)ng/ml显著升高;P<0.01.CAP/CPPS组EPS中MCP-1水平与NIH-CPSI呈正相关(r=0.716,P<0.01),且与患者疼痛评分明显相关(r=0.875,P<0.01),CAP/CPPS患者前列腺液中MCP-1水平与EPS中白细胞数呈正相关(r=0.898,P<0.01).结论 Ⅲ型前列腺炎患者外周血中CD4+CD25+Treg数量表达下调,导致患者自身免疫反应增强,可能是CAP/CPPS的发病机制之一;MCP-1在CAP/CPPS的发病过程中起重要作用,并且与临床症状密切相关,MCP-1可能成为CAP/CPPS临床诊断的一个指标.     

乳腺癌患者CD4+CD25+Foxp3+调节性T细胞的变化及意义

目的:探讨乳腺癌患者CD4+CD25+Foxp3+调节性T细胞(简称Foxp3+Treg)的变化及意义。方法:选择40例乳腺癌患者和32例乳腺良性肿瘤患者,采用流式细胞术检测外周血Foxp3+Treg、CD8+CD28+T细胞、NK细胞水平;用Western blot和RT-PCR病变乳腺组织Foxp3蛋白与m RNA表达。结果:乳腺癌患者外周血中Foxp3+Treg比例较乳腺良性肿瘤患者明显升高,而CD8+CD28+T细胞、NK细胞比例明显降低(均P0.05),且乳腺癌患者外周血Foxp3+Treg水平与CD8+CD28+T细胞和NK细胞水平呈负相关(r=-0.631,r=-0.578,均P0.05);乳腺癌患者术后外周血Foxp3+Treg水平较术前明显降低(P0.05)。乳腺癌组织中Foxp3蛋白与m RNA的表达均较乳腺良性肿瘤组织明显升高(均P0.05)。结论:Foxp3+Treg和其标记分子Foxp3在乳腺癌患者中的表达增加,且可能通过抑制CD8+CD28+T细胞和NK细胞而产生肿瘤免疫抑制。     

Acceleration of apoptosis in CD4+CD8+ thymocytes by rapamycin accompanied by increased CD4+CD25+ T cells in the periphery

BACKGROUND: Rapamycin (Rapa) is an immunosuppressant that is used in patients and animal models to control allograft rejection. Its mechanisms of action are not fully understood. In this article, the authors have investigated the effects of therapeutic doses of Rapa on both thymic and peripheral T-cell populations in the adult rat. METHODS: The therapeutic dosage of Rapa was optimized using cardiac transplantation between LEW and DA rats. Thymic morphology was assessed by hematoxylin-eosin staining. Flow cytometric analysis was performed to analyze T-cell phenotype and apoptosis. T-cell receptor (TCR)-mediated T-cell responsiveness was evaluated by 3[H]-thymidine deoxyribose incorporation. RESULTS: Rapa induced atrophy in the thymus but not in peripheral lymphoid organs. Moreover, fibrosis occurred in thymus that was long-lasting after Rapa withdrawal. In animals treated with Rapa, there was a significant reduction in CD4+CD8+ thymocytes caused by accelerated apoptosis, whereas CD4-CD8-, CD4+CD8-, and CD8+CD4- populations remained unaffected. In contrast, the cellularity of the periphery lymphoid organs was not altered. Within the CD4+ thymocyte population, CD4+CD25+ thymocytes were resistant to Rapa-accelerated apoptosis, and in the periphery, the ratio of CD4+CD25+ to CD4+CD25- T cells was increased. Notably, the peripheral CD4+CD25+ T cells were hyporesponsive to TCR-mediated activation. CONCLUSIONS: The resistance of the peripheral CD4+CD25+ T cells to Rapa treatment might contribute to its immunosuppressive action. The long-term effects of Rapa on thymus atrophy and thymocyte development requires consideration with respect to its clinical application.     

肝癌、肝硬化组织中CD3、CD57、CD20细胞数量与临床病理表现及预后的关系

目的探讨CD3、CD57、CD20细胞在原发性肝细胞癌(HCC)、癌旁、肝硬化及正常肝组织中的数量及意义.方法HCC 60例,单纯性肝硬化62例,正常肝组织23例,以免疫组化SP法进行CD3、CD57、CD20染色,对阳性细胞数进行定量分析并与临床资料进行相关探讨.结果(1)各组CD3+细胞平均数从高到低为癌旁组织、癌组织、肝硬化组织、正常肝组织(P＜0.05);各组CD57+细胞平均数从高到低为癌组织、癌旁组织、正常肝组织、肝硬化组织(P ＜0.05);各组CD20+细胞平均数从高到低为癌组织、癌旁组织、肝硬化组织、正常肝组织(P ＜0.01).(2)HCC中CD3+细胞、CD57+细胞、CD20+细胞与组织学分级均无明显关系.(3)HCC中CD57+细胞和CD20+细胞随着临床分期的发展有下降的趋势(P ＜0.05);HCC中CD3+细胞平均数与临床TNM分期无关.(4)HCC中15月内有转移组的CD57+、CD3+细胞数均少于无转移组(P＜0.01).HCC患者15月内有无转移与HCC和癌旁组织中的B细胞分布均无关.结论临床上,随着HCC患者的病情恶化,CD3+、CD57+、CD20+细胞逐渐减少.CD3+、CD57+、CD20+细胞可成为反映机体抗肿瘤特异性细胞免疫状态和生物学行为及判断患者预后的重要指标.     

血清微环境对小鼠T细胞衰老的调节作用

目的：探讨血清微环境对小鼠T细胞衰老的调节作用。方法：分别取年老（12～14月龄）及年轻（1.5～2月龄）小鼠各10只,提取其脾脏淋巴细胞及血清,实验分4组。组I为年老鼠T淋巴细胞＋10%年轻鼠血清;组II为年老鼠T淋巴细胞＋10%年老鼠血清;组III为年轻鼠T淋巴细胞＋10%年轻鼠血清;组IV为年轻鼠T淋巴细胞＋10%年老鼠血清。培养48h后,经流式细胞术研究CD8＋CD28＋共表达率差异。结果：组I和组II T细胞表面的CD8＋CD28＋共表达率分别是（10.84±0.6841）%和（3.18±0.1789）%,组III和组IV T细胞表面的CD8＋CD28＋共表达分别是（12.5±0.9445）%和（8.36±0.2074）%。各组间对比有统计学差异（P〈0.05）结论：血清微环境具有调节小鼠T细胞衰老的作用,年轻鼠血清能使年老鼠的T细胞表面的CD8＋CD28＋共表达率提高,年老鼠的血清能使年轻鼠的T细胞表面的CD8＋CD28＋共表达率降低。     

CD19+CD5+ B cells in primary IgA nephropathy

The source of IgA and the mechanism for deposition of IgA in the mesangium remain unknown for primary IgA nephropathy. Because CD19(+)CD5(+) B cells are important producers of IgA and contribute to several autoimmune diseases, they may play an important role in IgA nephropathy. In this study, flow cytometry, quantitative PCR, and confocal microscopy were used to assess the frequency, distribution, Ig production, CD phenotypes, cytokine production, and sensitivity to apoptosis of CD19(+)CD5(+) B cells in the peripheral blood, peritoneal fluid, and kidney biopsies of 36 patients with primary IgA nephropathy. All patients with IgA nephropathy were significantly more likely to have CD19(+)CD5(+) B cells in the peripheral blood, peritoneal fluid, and kidney biopsies than were five control subjects and 10 patients with active systemic lupus erythematosus. The 33 patients who had IgA nephropathy and responded to treatment demonstrated a significant decrease in CD19(+)CD5(+) B cells in the peripheral blood, peritoneal fluid, and kidney (all P < 0.01). In the three patients who had IgA nephropathy and did not respond to treatment, the frequency of CD19(+)CD5(+) B cells did not change. CD19(+)CD5(+) B cells isolated from patients with untreated IgA nephropathy expressed higher levels of IgA, produced more IFN-gamma, and were more resistant to CD95L-induced apoptosis than cells isolated from control subjects and patients with lupus; these properties reversed with effective treatment of IgA nephropathy. In conclusion, these results strongly suggest that CD19(+)CD5(+) B cells play a prominent role in the pathogenesis of primary IgA nephropathy.     

CD4+CD25+ cells regulate CD8 cell anergy in neonatal tolerant mice

BACKGROUND: Injection of neonatal BALB/c mice with semi-allogeneic splenocytes leads to antigen-specific tolerance lasting into adulthood. Tolerant mice accept A/J skin grafts and fail to generate CD8 cytotoxic T lymphocyte (CTL) activity against A/J targets. Anergic CD8 T cells are present in tolerant mice, and CD4 regulatory cells function to maintain CD8 cell anergy. METHODS: Neonatal BALB/c mice were injected with 108 live CAF, splenocytes, and mice were deemed tolerant by accepting A/J grafts over 40 days. CD8 cell proliferation was measured by in vitro incorporation of bromodeoxyuridine coupled with fluorescence-activated cell sorter analysis. Alloantigen-specific cytotoxicity was tested using 51Cr release assays of A/J or third-party targets. RESULTS: We demonstrate that A/J-specific anergic CD8 cells are present in neonatal primed mice that develop tolerance but not in neonatal primed mice that reject A/J skin grafts. Anergic CD8 cells show decreased proliferation and no CTL activity against A/J targets. Addition of interleukin-2 (IL-2) to unfractionated cultures fails to restore CTL activity against A/J targets. However, addition of IL-2 to CD4-depleted cultures restores A/J-specific CD8 CTL activity. Removal of CD4+/CD25+ cells, but not CD4+/CD25- cells, also restores CD8 CTL activity against A/J in the presence, but not the absence, of IL-2. Moreover, when added back into cultures, purified CD4+/CD25+ cells from tolerant mice inhibit the generation of CD8 CTL against A/J targets. CONCLUSION: These data indicate that CD8 anergy is associated with the state of tolerance, and that CD4+CD25+ cells from tolerant mice function to maintain A/J-specific CD8 cell anergy in vitro.