Influence of Danshen Injection on airway inflammation and CD4^＋CD25^＋ regulatory T cells of asthmatic rats

Objective： To investigate the influence of Danshen Injection on airway inflammation and CD4^＋CD25^＋ regulatory T cells（CD4^＋CD25^＋ Tr） of asthmatic rats, and elucidate the possible mechanism of Danshen Injection in treatment of asthma. Methods： 30 Wister rats were randomly divided into control group, asthma group and Danshen Injection treated group. Bronchoalveolar lavage fluids （BALF） were collected, and cytology studies were conducted. Lung tissues were obtained and pathologic analyses were done with hematoxylin and eosin stain （HE）. Flow cytometry was used to detect the CD4^＋CD25^＋ Tr ratio in peripheral blood mononuclear cells （PBMCs）. Results： Total cell, the percentage of lymphocytes, neutrophils and eosinophils （Eos） in BALF of Danshen Injection-treated group were lower than that in asthma group （P〈0.05, P〈0.01）. Compared with asthma group, less infiltration of inflammatory cells in lung tissues was observed in Danshen Injection-treated group. CD4^＋CD25^＋ Tr of asthma group was lower than that of control and Danshen Injection treated group （P〈0.05）. Conclusion： Danshen Injection can suppress airway inflammation of asthmatic rats, probably by increasing the number of CD4^＋CD25^＋ Tr.     

Correlation of Thl7 cells and CD4＋CD25＋ regulatory T cells with clinical parameters in patients with systemic sclerosis

Background Systemic sclerosis （SSc） is an autoimmune disease that has three major components： inflammation, fibrosis, and vasculopathy. T-helper 17 cell （Th17） and regulatory T cell （Treg） are considered to be critical for autoimmune disease pathogenesis. The role of Th17 and Treg in SSc is still unclear. The aim of this study was to detect the presence of Th17s and CD4＊CD25~ Tregs in peripheral blood samples from SSc patients and to investigate the possible roles of these two T cell subsets in SSc pathogenesis. Methods Th17s （CD4 and IL-17 positive） and CD4＊CD25~ Tregs （CD4, CD25 and Foxp3 positive） in the peripheral blood mononuclear cells of 53 SSc patients and 27 healthy controls were counted by flow cytometry. The differences between SSc and control patients were analyzed. Clinical parameters, including disease duration, duration of the second symptoms, Modified Rodnan Skin Score （MRSS）, anti-topoisomerase I antibody, anti-U1 ribonucleoprotein （RNP） antibody, systemic involvements, pulmonary function test （PFT） and high resolution computed tomography （HRCT） score were prospectively collected following EUSTAR （EULAR scleroderma trial and research group） protocols. The correlations between the experimental and clinical data were investigated. Results The ratio of Th17 in SSc patients was significantly elevated compared to healthy controls （8.74% vs. 4.41%, P 〈0.001）. The amount of Th17 was positively correlated with disease duration （R=-0.531, P=-0.013） and duration of the second symptoms （R=-0.505, P=0.023）. The ratio of CD4＊CD25＊ Treg in SSc patients also significantly differed from the healthy controls （3.04% vs. 2.24%, P=0.018）. Elevated Tregs were more frequently observed in patients with a high interstitial lung disease （ILD） score on computed tomography （24/36） compared with patients with normal ILD scores （4/12, ,P=-0.043）. Elevated Tregs were also more often observed in patients with low carbon monoxide diffusing capacity     

Changes of CD4＋ CD25＋ Regulatory T Cells in Peripheral Blood in Patients with Hepatocellular Carcinoma Before and after TACE

This study investigated the changes of CD4 CD25 regulatory T cells (Tregs) in periph-eral blood of patients with hepatocellular carcinoma before and after transcatheter arterial chemoem-bolization (TACE). The proportion of CD4 CD25 Tregs among CD4 T lymphocytes in peripheral blood of 33 patients with hepatocellular carcinoma was determined by flow cytometry before, 1 week and 1 month after TACE. And 25 healthy volunteers served as control. One month after TACE, the patients were divided into two groups: 22 in group A, who were in stable condition or getting better; and 10 in group B, who were deteriorating. One patient died and was excluded. The results showed that the percentage of CD4 CD25 Tregs among CD4 T lymphocytes did not significantly change in the 33 patients 1 week after TACE as compared with that before TACE, however, the difference was significant (P<0.01) between the patients with hepatocellular carcinoma and the healthy subjects. The percentage of CD4 CD25 Tregs among CD4 T lymphocytes in group A 1 month after TACE was decreased significantly in comparison with that before and 1 week after TACE (P<0.01), whereas, that in group B was increased significantly 1 month after TACE (P<0.01). It was concluded that patients with hepatocellular carcinoma had a higher proportion of CD4 CD25 Tregs in peripheral blood. TACE did not significantly affect the level of CD4 CD25 Tregs within short time (such as 1 week). The proportion of CD4 CD25 Tregs in peripheral blood 1 month after TACE was related to the prognosis of hepatocellular carcinoma.     

fas介导系统性红斑狼疮患者Foxp3+CD4+CD25+Treg细胞凋亡的研究

目的 探讨fas凋亡信号传导途径在系统性红斑狼疮(SLE)患者Foxp3+CD4+CD25+Treg凋亡异常中的作用.方法 选取活动期SLE患者25例、缓解期SLE患者20例及健康对照25名为研究对象,检测所有研究对象外周血Foxp3+CD4+CD25+Treg表面fas的表达,同时分析CD4+CD25+T细胞Foxp3表达.并分别将fas表达率及Foxp3表达率与病情活动性(SLEDAI评分)进行相关分析.结果 (1)外周血Foxp3+CD4+CD25+Treg上fas的表达:活动期SLE组为(23.72±2.35)%,缓解期SLE组为(14.0±2.1)%,对照组为(10.1±1.2)%,在活动期SLE组明显高于缓解期SLE组(P＜0.01)和对照组(P＜0.01),而缓解期SLE组与对照组差异无统计学意义(P＞0.05),fas在Foxp3+CD4+CD25+Treg上的表达与SLEDAI评分呈正相关(r=0.336,P＜0.05).(2)外周血CD4+CD25+T细胞Foxp3的表达:活动期SLE组为(2.83±0.30)%,缓解期SLE组为(5.38±0.63)%,对照组为(8.12-±0.70)%.活动期SLE组外周血 CD4+CD25+T细胞Foxp3表达明显低于缓解期SLE组(P＜0.01)和对照组(P＜0.01);而缓解期SLE组亦低于对照组(P＜0.05).外周血Foxp3表达与SLEDAI评分呈负相关(r=-0.581,P＜0.01).(3)Foxp3与fas的表达呈负相关(r=-0.349,P＜0.01).结论 SLE患者中存在由fas介导的Foxp3+CD4+CD25+Treg的过度凋亡,这可能是导致SLE病情活动的机制之一.

Abstract：

Objective To explore the role of fas apoptosis signal transduction pathway in the abnormal apoptosis of Foxp3 + CD4 + CD25 + Treg in patients with systemic lupus erythematosus ( SLE ).Methods Twenty-five active SLE patients, 20 remission SLE patients and 25 controls were selected. The level of fas expression on peripheral blood Foxp3 + CD4 + CD25 + Treg surface was detected in SLE patients.And analyzed the expression rate of Foxp3 on CD4 + CD25 + T cells was analyzed to explore the relationship between the expression rate and disease activity. Results ( 1 ) The expression rate of fas on Foxp3 + CD4 +CD25 + Treg was (23.72 ± 2. 35 )% , ( 14. 0 ± 2. 1 )% in active and remission SLE groups respectively versus ( 10. 1 ± 1.2)% in control group. The fas expression rate of active SLE group was significantly higher than those of remission SLE group( P ＜ 0. 01 ) and control group ( P ＜ 0. 01 ). And the remission SLE and control groups were not statistically significant ( P ＞0. 05 ). The expression rate of fas on the Foxp3 + CD4 +CD25 + Treg was positively correlated with the SLEDAI ( SLE disease activity index ) score ( r = 0. 336, P ＜0.05). (2) The expression rate of Foxp3 on CD4 +CD25 +T cells was (2.83 ±0.30)%, (5.38 ±0. 63 ) % in active and remission SLE groups respectively versus ( 8. 12 ± 0. 70 ) % in control group. The expression rate of Foxp3 was significantly lower in active SLE group than that in remission SLE group ( P ＜0. 01 )and control group( P ＜0. 01 ). And the Foxp3 expression rate of remission group was also lower than that of control group ( P ＜ 0.05 ). The expression rate of Foxp3 was negatively correlated with the SLEDAI score (r = -0. 581, P ＜ 0. 01 ). (3) The expression rate of Foxp3 was negatively correlated with fas (r=- 0. 349, P ＜ 0. 01 ). Conclusion The abnormal apoptosis of Foxp3 + CD4 + CD25 + Treg mediated by the fas apoptosis signal transduction pathway may be one of the pathogenic mechanisms of disease activity in SLE patients.     

Changes of CD4＋ CD25＋ Regulatory T Cells in Peripheral Blood in Patients with Hepatocellular Carcinoma Before and after TACE

This study investigated the changes of CD4＋ CD25＋ regulatory T cells （Tregs） in periph-eral blood of patients with hepatocellular carcinoma before and after transcatheter arterial chemoem-bolization （TACE）. The proportion of CD4＋ CD25＋ Tregs among CD4＋ T lymphocytes in peripheral blood of 33 patients with hepatocellular carcinoma was determined by flow cytometry before, 1 week and 1 month after TACE. And 25 healthy volunteers served as control. One month after TACE, the patients were divided into two groups： 22 in group A, who were in stable condition or getting better; and 10 in group B, who were deteriorating. One patient died and was excluded. The results showed that the percentage of CD4＋CD25＋ Tregs among CD4＋ T lymphocytes did not significantly change in the 33 patients 1 week after TACE as compared with that before TACE, however, the difference was significant （P〈0.01） between the patients with hepatocellular carcinoma and the healthy subjects. The percentage of CD4＋ CD25＋ Tregs among CD4＋ T lymphocytes in group A 1 month after TACE was decreased significantly in comparison with that before and 1 week after TACE （P〈0.01）, whereas, that in group B was increased significantly 1 month after TACE （P〈0.01）. It was concluded that patients with hepatocellular carcinoma had a higher proportion of CD4＋CD25＋ Tregs in peripheral blood. TACE did not significantly affect the level of CD4＋ CD25＋ Tregs within short time （such as 1 week）. The proportion of CD4＋CD25＋ Tregs in peripheral blood 1 month after TACE was related to the prognosis of hepatocellular carcinoma.     

CD4^＋CD25^high Regulatory Cells in Peripheral Blood of NSCLC Patients

The proportion and changes of CD4 CD25high regulatory T cells (Trs) in peripheral blood of non-small cell lung cancer (NSCLC) patients were analyzed and their clinical significance explored. The peripheral blood was collected from 61 patients with NSCLC and 15 healthy controls. By using monoclonal antibodies, the blood samples were evaluated with the flow cytometry for lymphocyte subsets (CD3 , CD4 and CD8 ) and CD4 CD25high Tr cells. The results showed that the proportion of CD4 CD25high Tr cells in NSCLC group was significantly higher than in control group [(4.36±2.07) % vs (2.04±1.03) %, P<0.01]. The proportion of CD4 CD25 high Tr cells in late stage was higher than that in early stage [stages I II (2.26 0.6) %; stage III (3.28 1.38) %; stage IV (6.06±4.08) %] (P<0.05). Kaplan-Meier survival analysis revealed that the prognosis of the patients who had higher proportion of CD4 CD25high Tr cells in peripheral blood was worse (P=0.0026). In conclusion, the relative increase in CD4 CD25high Tr cells in peripheral blood may be related to im-munosuppression and tumor progression in patients with NSCLC. This finding suggests that CD4 CD25 high Tr cells in peripheral blood of NSCLC may be positive for prognosis analysis. The use of depletion of the CD4 CD25high Tr cell therapy to treat NSCLC patients may be an effective strategy.     

Changes of CD4^＋CD25^＋ Regulatory T Cells in Patients with Acute Coronary Syndrome and the Effects of Atorvastatin

The function of CD4＋CD25＋ regulatory T lymphocytes （Treg） in patients with acute coronary syndrome （ACS） and the effects of atorvastatin were investigated. Forty-eight patients with ACS were randomly divided into two groups： group C receiving conventional therapy （n=24）, and group C＋A receiving conventional therapy＋atorvastatin （10 mg/day, n=24）. T lymphocytes from ACS patients （before and 2 weeks after the treatment） or 18 healthy subjects were separated and the flow cytometry was used to measure the percentage of Treg. The inhibitory ability of Treg on effector T cells was determined by mixed lymphocyte reaction （MLR）. ELISA was used to measure the serum levels of cytokines （IL-10, TGF-β1 and IFN-γ） before and after treatment. The results showed that as compared with normal control group, Treg percentage was decreased significantly （P〈0.01）, the inhibitory ability of Treg on the T lymphocytes proliferation was reduced （P〈0.01）, IFN-γ levels were increased and IL-10 and TGF-β1 levels were lowered in ACS patients. After treatment with atorvastatin, Treg percentage and the inhibitory ability of Treg on T lymphocytes proliferation were significantly increased in ACS patients. Serum IFN-γ was decreased significantly, while IL-10 and TGF-β1 were elevated significantly as compared with the non-atorvastatin group. The number of Treg was positively correlated with serum TGF-β1, but negatively with serum IFN-γ and CRP. It was concluded that ACS was associated with decreased number and defected function of Treg, which may play an important role in initiating immune-inflammatory response in ACS. The inhibitory effects of atorvastatin on inflammation in ACS may be due to its beneficial effects on Treg and restoration of immune homeostasis.     

从Th17和CD4+CD25+Foxp3+T细胞功能变化探讨肺结核的耐药机制

目的 分析耐药肺结核患者外周血Th17细胞与CD4+CD25+Foxp3+T细胞比例及细胞因子的变化,从免疫学角度探讨其耐药机制。 方法 分别选取33例耐药肺结核(耐药组)、49例普通肺结核(普通组)及51例健康志愿者(对照组)展开对比研究。检测Th17细胞与CD4+CD25+Foxp3+T细胞比例;采用RT-PCR检测其特异性转录因子RORγt与Foxp3的mRNA表达水平;采用ELISA实验检测IL-17A、IL-17F、TGF-β1及IL-10的血清水平。 结果 普通组Th17细胞比例和RORγt mRNA表达水平低于对照组,耐药组低于普通组;普通组CD4+CD25+Foxp3+T细胞比例和Foxp3 mRNA表达水平高于对照组,耐药组高于普通组;普通组Th17/CD4+CD25+Foxp3+T和RORγt/Foxp3低于对照组,耐药组低于普通组(P＜0.05)。普通组IL-17A、IL-17F水平低于对照组,耐药组低于普通组;普通组TGF-β1、IL-10水平高于对照组,耐药组高于普通组;其组间差异均有统计学意义(P＜0.05)。 结论 Th17/CD4+CD25+Foxp3+T平衡向CD4+CD25+Foxp3+T偏移、免疫系统功能抑制,可能是结核病慢性化和产生耐药的重要机制之一。      

成人微小病变肾病患者外周血CD4~＋Foxp3~＋调节性T细胞的研究

目的研究CD4＋Foxp3＋调节性T细胞（CD4＋Foxp3＋Treg）及亚群在成人微小病变肾病（MCD）患者外周血CD4＋T细胞中的分布,探讨CD4＋Foxp3＋Treg参与MCD发病的可能机制。方法以27例经肾穿刺活检确诊为MCD的初发成人患者作为研究对象,采用Foxp3-FITC/CD45RA-PE/CD3-ECD/CD4-PC7抗体组合经流式细胞仪检测外周血单个核细胞（PBMCs）中CD4＋Foxp3＋Treg及亚群占CD4＋T细胞的百分比。Real-Time PCR检测PBMCs中Foxp3、Th17转录因子RORc以及细胞因子TGF-β1、IL-6、IL-17A、IL-23mRNA表达。设立正常对照。结果流式细胞检测显示CD4＋Foxp3＋Treg分成3个细胞群体,分别为CD45RA＋Foxp3low（Ⅰ区,静息期Treg）、CD45RA-Foxp3high（Ⅱ区,活化Treg）和CD45RA-Foxp3low（Ⅲ区）。MCD组Ⅰ区＋Ⅱ区细胞和Ⅱ区细胞占CD4＋T细胞的百分比显著低于对照组（P〈0.01）。MCD组PBMCs中Foxp3mRNA表达较对照组下调（P〈0.05）,RORcmRNA表达较对照组上调（P〈0.05）,IL-6、IL-17A、IL-23mRNA表达均显著高于对照组（P〈0.05和P〈0.01）。相关性分析显示,MCD组IL-17A mRNA表达与Ⅱ区细胞占CD4＋T细胞的百分比呈显著负相关（r=-0.81,P〈0.05）。结论成人MCD患者外周血Treg及其活化功能亚群减少,同时伴有Th17转录基因及其相关细胞因子表达的异常升高。提示Treg Foxp3 mRNA表达下调及Treg/Th17细胞比例失衡可能与MCD的发病有关。     

肿瘤细胞对CD4~+CD25~+Treg细胞数量和功能的影响

目的：探讨肿瘤细胞与免疫细胞相互作用对CD4+CD25+Treg细胞数量和功能的影响。方法：建立Lewis肺癌细胞与小鼠脾淋巴细胞共培养体系。Lewis肺癌细胞与不同浓度小鼠脾淋巴细胞共培养,分为4组：实验组Ⅰ（5×105个Lewis肺癌细胞与1×106个淋巴细胞共培养）、对照组Ⅰ（1×106个淋巴细胞单独培养）、实验组Ⅱ（5×105个Lewis肺癌细胞
与2×106个淋巴细胞共培养）、对照组Ⅱ（2×106个淋巴细胞单独培养）;Lewis肺癌细胞与
淋巴细胞共培养不同时间,采用3个时间点：24、48和72 h;Lewis肺癌细胞培养上清与淋巴细
胞共培养,选择培养上清浓度为20%和50%。采用流式细胞术检测了Lewis肺癌细胞与脾淋巴
细胞共培养系统中CD4+CD25+Treg细胞数量变化,通过RT-PCR方法检测了共培养对Foxp
3 mRNA表达的影响。结果：与对照组比较,实验组Ⅰ 中CD4+CD25+Treg细胞数量和Foxp3 mRN
A表达明显增强（P<0.05）,实验组Ⅱ中CD4+CD25+Treg细胞数量和Foxp3 mRNA表达无明
显变化（P>0.05）;Lewis肺癌细胞与淋巴细胞培养24及48 h可见CD4+CD25+Treg细胞数量及Foxp3
mRNA表达明显升高（P<0.05）,而72 h后变化不明显;20%和50% Lewis肺癌细胞培养上清
均可明显提高CD4+CD25+Treg数量及Foxp3 mRNA表达（P<0.05）。结论：肿瘤细胞及其培养
上清可诱导CD4+CD25+Treg细胞数量增加、功能增强,由肿瘤细胞所引起的CD4+CD25+Treg细
胞产生及功能增强可能是肿瘤逃避免疫监视机制之一。     

哮喘患者外周血调节性T细胞和Th17细胞数量及其转录因子的变化

[摘要] 目的： 观察哮喘患者外周血CD4+CD25+Foxp3+、CD4+IL-17+细胞的百分比和Foxp3、白介素-17(IL-17)、RORγt mRNA的表达水平的变化与哮喘发病的关系。方法： 分别取23例哮喘缓解期患者、25例哮喘急性发作期患者和20例健康人（对照组）的外周血单个核细胞（PBMC）,免疫磁珠阴选CD4+T细胞,采用Foxp3、IL-17胞内染色的方法,通过流式细胞术检测CD4+CD25+Foxp3+以及CD4+IL-17+细胞的百分比,应用RT-PCR检测Foxp3、IL-17、RORγt mRNA水平。结果： 免疫磁珠阴选CD4+T细胞纯度达90％以上。急性发作组患者外周血CD4+CD25+Foxp3+细胞百分比以及Foxp3 mRNA水平较对照组和缓解组明显降低（P＜0.01）,而缓解组和对照组比较,差异无统计学意义（P＞0.05）;急性发作组CD4+IL-17+细胞比例以及IL-17、RORγt mRNA表达较对照组和缓解组明显增高（P＜0.01）,而缓解组亦明显高于对照组（P＜0.05）。结论： Treg/Th17失衡可能和哮喘发病密切相关。     

Foxp3 expression in CD4<Superscript>+</Superscript>CD25<Superscript>+</Superscript>Foxp3<Superscript>+</Superscript> regulatory T cells promotes development of colorectal cancer by inhibiting tumor immunity

The mechanism underlying CD4⁺CD25⁺Foxp3⁺ regulatory T cells (Tregs) promoting the development of colorectal cancer (CRC) was elucidated in the present study. Forty-eight cases of colorectal carcinomas, 22 cases of colon polyps and 21 cases of normal colorectal tissues were collected. The correlation among Foxp3, IL-10 and Stat3, and the clinical relevance of these three indexes were analyzed. The results showed that the levels of Foxp3 expressed in infiltrating CD4⁺CD25⁺Foxp3⁺Tregs, and IL-10 and Stat3 in CRC tissues were all significantly higher than those in polypus tissues and normal colon tissues (P< 0.01). Pearson correlation analysis indicated that the expression level of Foxp3 was positively correlated with Stat3 at mRNA level (r=0.526, P=0.036), and was positively correlated with IL-10 at protein level (r=0.314, P=0.030). The Foxp3 expressed in CD4⁺CD25⁺Foxp3⁺Tregs was correlated with the histological grade, lymph node metastasis and TNM stage of CRC (P<0.05 for all). The IL-10 expression was correlated with the histological grade and TNM stage (both P<0.05). The Stat3 expression was correlated with the lymph node metastasis and TNM stage (both P<0.05). It was concluded that CD4⁺CD25⁺Foxp3⁺Tregs can inhibit tumor immunity in combination with some other related inhibitory cytokines and that Foxp3 expression in CD4⁺CD25⁺Foxp3⁺Tregs correlates with CRC progression.     

毛细支气管炎CD4+ CD25+调节性T细胞和Foxp3 mRNA表达与激素调控

目的 探讨毛细支气管炎(简称毛支)的发病机制与激素治疗.方法 对呼吸道合胞病毒(RSV)阳性的毛支患儿,根据血清总IgE是否增高以及有无湿疹、皮炎等过敏病史,分为特应体质和非特应体质2组,各50例,另选健康对照组25名.毛支患儿按临床评分分为轻、中、重度(18、62、20例);再随机分成激素组(49例)和非激素组(51例).流式细胞仪检测外周血CD4+ CD25+调节性T细胞(Treg)的比例;反转录(RT)-PCR检测Foxp3 mRNA的表达量.结果 CD4+ CD25+ Treg的数量和Foxp3 mRNA表达量:健康对照组、非特应体质组、特应体质组分别为(10.5±1.6)%和0.34±0.11、(8.8±2.2)%和0.26±0.08、(7.6±1.8)%和0.21±0.09,差异均有统计学意义(均P<0.05);轻、中、重组分别为(9.7±1.6)%和0.28±0.08、(7.8±2.1)%和0.24±0.06、(6.7±1.3)%和0.20±0.07(均P<0.05).CD4+ CD25+ Treg数量、Foxp3 mRNA的表达量与临床评分均呈显著负相关(r=-0.62、-0.71,均P<0.01);激素治疗后两者均升高[(9.5±2.1)%和0.33±0.10分别比(8.5±1.8)%和0.27±0.12,P<0.05和<0.01].结论 CD4+ CD25+ Treg和Foxp3 mRNA与RSV毛支气道炎症关系密切,可反映毛支的病情严重程度.激素可促进CD4+ CD25+ Treg的发育和功能.     

低剂量环磷酰胺对Lewis肺癌小鼠CD4+CD25+Treg细胞功能的影响

目的：研究低剂量环磷酰胺（CTX）单次注射对Lewis肺癌小鼠CD4⁺CD25⁺Treg细胞功能的影响,探讨CD4⁺CD25⁺Treg 细胞与肿瘤发生、发展的关系。方法：将传代培养的Lewis肺癌细胞接种于C57BL/6小鼠右腋皮下,建立Lewis肺癌模型,随机分成3组：CTX组、肿瘤组、单纯对照组。采用CTX单次注射,观测各组肿瘤体积动态变化;采用流式细胞术检测各组小鼠脾脏CD4⁺CD25⁺Treg细胞数量变化;采用半定量RT-PCR方法检测各组小鼠脾脏Foxp3 mRNA表达水平;采用MTT法检测脾脏T淋巴细胞增殖功能;采用LDH释放法检测脾脏特异性细胞毒性T淋巴细胞(CTLs)细胞的杀伤活性。结果：与未治疗肿瘤组相比,CTX治疗可延缓荷19 d Lewis肺癌小鼠的肿瘤生长;CTX组小鼠脾脏CD4⁺CD25⁺Treg细胞数量低于肿瘤组（P< 0.05）;CTX组小鼠脾脏Foxp3 mRNA表达水平明显低于肿瘤组（P< 0.05）;CTX组小鼠脾脏T淋巴细胞功能明显高于肿瘤组（P<0. 05）;CTX组小鼠脾脏T淋巴细胞杀伤活性比肿瘤组略高,但变化不显著（P>0.05）。结论：CTX单次注射可降低Lewis肺癌小鼠脾脏CD4⁺CD25⁺Treg细胞的数量及Foxp3 mRNA表达,使T淋巴细胞增殖功能及脾细胞中CTLs杀伤功能增强。     

丹参注射液对哮喘大鼠气道炎症及CD4+CD25+调节性T细胞的影响

目的 观察丹参注射液对支气管哮喘(哮喘)大鼠气道炎症和CD4 CD25 调节性T细胞(CD4 CD25 Tr)的影响,探讨丹参注射液治疗哮喘的新机制.方法 30只Wistar大鼠随机分成正常对照组、哮喘组、丹参治疗组.计数支气管肺泡灌洗液(BALF)中细胞总数并分类,应用苏木精一伊红染色行肺组织病理学检查,流式细胞仪检测外周血单个核细胞(PBMCs)中CD4 CD25 Tr的比例.结果 丹参治疗组BALF细胞总数及淋巴细胞、中性粒细胞和嗜酸性粒细胞(Eos)百分率较哮喘组均明显减少(P<0.05,P<0.01),与正常对照组比较差异无显著性意义(均P>0.05).病理组织学显示:丹参治疗组较哮喘组肺组织炎性细胞浸润明显减少.哮喘组PBMCs中CD4 CD25 Tr的比例较正常对照组明显减少(P<0.05),丹参治疗组CD4 CD25 Tr的比例较哮喘组明显增加(P<0.05).结论 丹参注射液可减轻哮喘大鼠气道炎症反应,其机制可能与促进CD4 CD25 Tr的产生有关.