上气道咳嗽综合征患者Th1、Th2细胞表达水平研究

目的探讨上气道咳嗽综合征（UACS）患者外周血辅助性T细胞（Th）亚群平衡偏移及其意义。方法收集78例UACS患者（慢性扁桃体炎25例、鼻后滴流综合征17例、过敏性鼻炎36例）,与40例健康体检者进行比较。以γ-干扰素（IFNγ-）代表Th1型细胞因子,白介素4（IL-4）代表Th2型细胞因子,ELISA法测定患者血清IL-27、IFN-γ、IL-4、肿瘤坏死因子α（TNF-α）浓度水平。结果正常组与UACS组之间比较,IL-27、IFN-γ、IL-4和TNF-α差异有统计学意义,正常组IL-27和IFN-γ浓度高于UACS组,差异有统计学意义,正常组IL-4和TNF-α浓度低于UACS组,且UACS组Th1/Th2比例失衡。结论 Th1、Th2细胞因子参与了UACS的发病,且Th1/Th2比例失衡可能是导致其发病的重要因素。     

乙型肝炎病毒感染者外周血单个核细胞内IL-2、IL-4和IFN-γ检测及意义

目的研究辅助性T淋巴细胞Th1/Th2细胞与乙型肝炎病毒（HBV）感染状态的关系。方法 25例慢性乙型肝炎患者（CHB组）、5例健康志愿者（健康对照组）、5例HBV感染后自然痊愈者（既往感染组）及5例CHB抗病毒治疗后完全应答者（完全应答组）的外周血单个核细胞（PBMC）经PMA诱导后,用流式细胞术检测其Th1和Th2细胞分泌IL-2、IL-4和IFN-γ的水平。结果慢性乙型肝炎患者Th1细胞分泌的细胞因子IFN-γ（0.1602±0.0657）、IL-2（0.1616±0.0639）,明显低于健康对照IFN-γ（0.4680±0.0377）、IL-2（0.5000±0.0625）和既往感染者IFN-γ（0.336±0.2908）、IL-2（0.256±0.17799）（P〈0.001）。CHB抗病毒治疗完全应答患者Th1细胞分泌的细胞因子IFN-γ（0.1620±0.0396）、IL-2（0.1940±0.0416）,亦明显低于健康对照（P〈0.001）,Th2细胞分泌的细胞因子IL-4（0.5096±0.1329）,明显高于健康对照IL-4（0.2820±0.0622）（P〈0.001）。既往感染者Th1细胞分泌的细胞因子IFN-γ（0.336±0.29082）、IL-2（0.256±0.17799）低于健康对照（P〈0.001）,Th2细胞分泌的细胞因子IL-4（1.29±0.16778）明显高于健康对照组、CHB患者组和HBV感染完全应答患者组（0.2820±0.0622、0.5096±0.1329、0.5740±0.06693）（P〈0.001）。结论 Th1/Th2细胞的功能与HBV感染的发展过程相关。     

儿童支气管哮喘血清IL-4、IL-10和IFN-γ浓度的测定及其临床意义

目的探讨血清白介素4（IL-4）、IL-10和干扰素γ（IFN-γ）与支气管哮喘（简称哮喘）的关系及其临床意义。方法随机收集于2008年6月至2009年1月期间在山东大学齐鲁儿童医院就诊的哮喘患儿纳入哮喘组,哮喘诊断全部符合2003年中华医学会儿科分会呼吸学组修订的支气管哮喘诊断标准,共计47例。同时选取性别和年龄与哮喘组匹配的51例健康体检儿童作为正常对照组。收集外周静脉血,采用双抗体夹心ELISA方法测定两组血清IL-4、IL-10、IFN-γ浓度,比较两组之间血清IL-4、IL-10、IFN-γ浓度的差异。结果哮喘组血清IL-4浓度[（346.74±82.92）ng/L]显著高于正常对照组[（199.87±59.25）ng/L]（P〈0.01）;哮喘组血清IL-10浓度[（86.38±58.58）ng/L]与正常对照组[（98.77±37.05）ng/L]的差异无统计学意义（P〉0.05）,哮喘组血清IFN-γ浓度[（94.51±22.92）ng/L]低于正常对照组[（110.75±47.11）ng/L]（P〈0.05）。结论 Th2类细胞因子IL-4在哮喘患儿血清中浓度升高,而Th1类细胞因子IFN-γ浓度下降,哮喘患儿存在Th1/Th2细胞免疫失衡;血清IL-4、IFN-γ浓度检测可以作为儿童哮喘的辅助诊断手段,同时本研究为使用抗IL-4制剂、补充IFN-γ等免疫学方法治疗哮喘提供依据。     

基因甲基化对哮喘Th1/Th2相关细胞因子表达的影响研究

正支气管哮喘(asthma)的变态反应性炎症和CD4+T细胞的活化及其所分泌的细胞因子有关。Th1细胞主要分泌干扰素(IFN-γ)减轻气道过敏性炎症,而Th2相关细胞因子以IL-4、IL-5为主,与哮喘血浆Ig E水平升高、趋化因子分泌增多、气道嗜酸粒细胞募集、气道平滑肌细胞增生肥大等均相关。DNA甲基化是     

细胞因子与过敏性哮喘

支气管哮喘是一种慢性气道炎症性疾病。在气道炎症反应中，无论是Th2型细胞因子（IL-4、IL-5、IL-13等），还是Th1型细胞因子IFN-γ均起着重要作用。新近研究进一步表明调节性T细胞（Treg）产生的细胞因子也与过敏性哮喘的发病密切相关。     

Graves 病患者血清 Th1／Th2细胞因子水平变化及意义

目的：观察Graves病（ GD）患者血清Th1/Th2细胞因子水平变化,并分析其意义。方法选择52例GD患者（ GD组）及60例同期健康体检者（对照组）,以ELISA法检测血清Th1细胞因子肿瘤坏死因子α（ TNF-α）、γ-干扰素（ IFN-γ）及Th2细胞因子IL-4、IL-10水平,以化学发光法检测甲状腺功能指标游离三碘甲状腺氨酸（ FT3）、游离甲状腺素（ FT4）、促甲状腺素（ TSH）水平,Pearson相关分析法分析上述两类指标间的关系。结果 GD组血清细胞因子水平均高于对照组,TNF-α/IL-4、TNF-α/IL-10、IFN-γ/IL-4和IFN-γ/IL-10均低于对照组（P均＜0．05）;GD组血清IL-4、IL-10与FT3、FT4均呈明显正相关,与TSH呈明显负相关（P均＜0．05）。结论 GD患者存在血清Th1/Th2细胞因子平衡紊乱,Th2细胞因子介导的体液免疫可能在其发病中具有重要作用。     

拉米夫定对慢性乙型肝炎的抗病毒疗效与Th1/Th2变化的关系

目的观察拉米夫定（LAM）治疗前后患者血清Th1/Th2比值的动态变化。方法用酶联免疫吸附（ELISA）方法分别检测60例慢性乙型肝炎患者在拉米夫定治疗前,治疗后第3、6、9、12月时的血清IFN-γ和IL-4水平。选取20名健康献血员作为正常对照。结果LAM治疗前ALT高水平组IFN-γ水平及IFN-γ/IL-4比值较高,完全应答率较高,无应答率较低;治疗后完全应答组IFN-γ/IL-4水平接近或高于对照组,部分应答组和无应答组IFN-γ/IL-4水平低于对照组。结论拉米夫定治疗慢性乙型肝炎可增加Th1类细胞因子IFN-γ分泌,抑制Th2类细胞因子IL-4分泌,治疗后Th1/Th2平衡的恢复与抗病毒疗效有关。T细胞免疫功能的恢复是抗病毒治疗的关键之一。     

T细胞在哮喘免疫调节中的作用

哮喘是由T细胞、嗜酸粒细胞、肥大细胞等多种炎症细胞参与的气道慢性炎症性疾病,气道慢性炎症导致气道高反应性（AHR）的形成.其中Th2细胞通过分泌IL-4、IL-5、IL-9、IL-13等多种细胞因子在哮喘发病中起主要作用,而Th1分泌的IFN-γ抑制Th2的功能,近年来研究发现CD4^＋T细胞还包括多种具有调节功能的细胞群体并参与哮喘的免疫调节.另外,NKT细胞和CD8^＋T细胞在哮喘免疫调节中亦具有一定的作用.     

猪带绦虫抗原刺激囊虫病患者PBMC Th1/Th2细胞因子的表达及其免疫调节

目的检测猪带绦虫不同虫期抗原刺激囊虫病患者外周血单个核细胞(PBMC)Th1/Th2细胞因子的表达水平,并分析其在囊虫病免疫调控中的作用。方法用流式细胞仪检测囊虫病患者新鲜血T淋巴细胞亚群,并以猪带绦虫六钩蚴抗原或囊尾蚴抗原刺激囊虫病患者PBMC,分别在刺激的第0d、5d、10d和15d时检测Th1/Th2细胞因子(IFN-γ及IL-4),对分泌IFN-γ或IL-4的不同细胞群体进行数据分析。结果囊虫病患者新鲜血T淋巴细胞亚群CD3+与CD4+细胞较正常人升高,CD4+/CD8+较正常人升高,分泌IFN-γ及IL-4的CD3+细胞百分率较正常人升高;猪囊尾蚴抗原刺激囊虫病患者PB-MC第0d、5d、10d和15d时,分泌IFN-γ的CD3+细胞百分率分别为25.42%±5.53%,30.46%±4.94%,36.52%±4.73%,38.69%±5.58%;分泌IL-4的CD3+细胞百分率分别为2.52%±0.52%,3.00%±0.57%,3.81%±0.70%,5.03%±0.73%。六钩蚴抗原刺激囊虫病患者PBMC分泌IFN-γ及IL-4的CD3+细胞百分率亦呈现相同的变化趋势。结论囊虫病患者与正常人相比PBMC中存在T淋巴细胞的极化水平异常,CD3+与CD4+细胞百分率均显著升高,T细胞亚群比例失调,免疫功能紊乱;随着囊尾蚴抗原刺激外周血PBMC时间延长,分泌IFN-γ和IL-4的CD3+细胞百分率逐渐升高。     

干扰素治疗对慢性乙型肝炎患者细胞免疫应答的影响

目的探讨Th1／Th2类细胞因子在CHB患者PBMC表达,及干扰素治疗慢性乙型肝炎（CHB）对患者Thl／Th2类细胞因子的影响。方法30例CHB患者给予干扰素治疗,治疗前后采用双抗体夹心法检测外周血单个核细胞IL-4、IL-10和IFN-γ的水平,同时选择15例健康人群作对照组。结果CHB组PBMC培养上清分泌IL-4水平显著高于健康对照组（P〈0．05）,而IFN-1水平则显著低于健康对照组（P〈0．01）;HBVDNA水平与IL-4水平呈正相关,与IFN-γ水平呈负相关。治疗结束后IL-4、IL-10水平较治疗前显著降低（P〈0．01,P〈0．05）,IFN-γ水平较治疗前显著升高（P〈0．01）。结论CHB存在异常细胞免疫应答,干扰素治疗CHB可提高患者Th1型细胞因子水平、降低Th2型细胞因子的水平。     

The Effect of Safranal on Th1/Th2 Cytokine Balance

Background: Several biological and medical benefits of Saffron, Crocus sativus (Iridaceae), have been demonstrated. However, mechanisms of actions for purified constituents are greatly unknown. Objective: To examine the effects of Safranal, a main constituent of Saffron stigma, on cell viability and cytokine profile of peripheral blood mononuclear cells (PBMC) were examined. Methods: Effects of Safranal at 0.1, 0.5 and 1 mM concentrations were evaluated on cell viability and production of interleukin 4 (IL-4), IL-10 and interferon-γ (IFN-γ) from non-stimulated and phytohemagglutinin (PHA) stimulated PBMCs, compared to 0.1 mM dexamethasone and saline. Results: In stimulated cells, different concentrations of Safranal caused significant decrease of lymphocytes viability (p<0.001 for all concentrations). All concentrations of Safranal inhibited IFN-γ and IL-10 secretion in stimulated cells (p<0.01). In addition, high concentration of Safranal significantly decreased cell viability of non-stimulated PBMCs (p<0.001). The effect of 1 mM Safranal on IL-4 secretion was less than dexamethasone (p<0.05). Safranal showed a stimulatory effect on IFN-γ secretion in non-stimulated cells. The IFN-γ/IL-4 ratio at the presence of two higher Safranal concentrations both in non-stimulated and stimulated cells were significantly higher than those of control and PHA stimulated groups, respectively (p<0.05). Conclusion: The IFN-γ/IL-4 ratio increases in the presence of Safranal which indicates an effect on Th1/Th2 balance. Therefore, Safranal may have therapeutic effects in inflammatory diseases associated with Th1/Th2 imbalance.     

拉米夫定治疗对慢性乙型肝炎患者干扰素-γ和白细胞介素-4的影响

目的 观察拉米夫定治疗慢性乙型肝炎患者血清IFN-γ和IL-4水平的动态变化.方法 ELISA法分别检测66例慢性乙型肝炎患者在拉米夫定治疗前,治疗后第3、6、9、12个月时的血清IFN-γ和IL-4水平.选取20名健康献血员作为健康对照.治疗前后比较用t检验,计数资料采用非参数秩和检验.结果 HBeAg阳性患者拉米夫定治疗前.完全应答组IFN-γ水平为(21.03±4.44)ng/L,明显高于部分应答组的(13.85±3.92)ng/L及无应答组的(10.63±3.11)ng/L(t=7.56,t=11.87,均P<0.01);以IFN-γ为15.66 ng/L为界,治疗前IFN-γ高水平患者完全应答率明显高于低水平患者(31.0%比8.7%,x2=8.391,P<0.01),无应答率明显低于低水平患者(13.8%比52.2%,x2=4.256,P<0.01).治疗后完全应答组患者IFN-γ/IL-4接近或高于对照组,部分应答组和无应答组低于对照组;HBeAg阴性患者拉米夫定治疗后IFN-γ/IL-4缓慢上升,但未达对照组水平.结论 拉米夫定治疗慢性乙型肝炎可增加IFN-γ释放,抑制IL-4释放,治疗应答程度与治疗后辅助性T淋巴细胞(Th)1/Th2平衡的恢复及治疗前IFN-γ水平有关.     

Atorvastatin Modulates Th1/Th2 Response in Patients With Chronic Heart Failure

BackgroundThe T-helper (Th)1/Th2 imbalance has been demonstrated to be involved in chronic heart failure (CHF). We sought to determine whether atorvastatin exhibited any effect on CHF through modulating the Th1/Th2 response.Methods and ResultsWe measured serum concentrations of interleukin (IL)-12, -18, interferon (IFN)-γ, IL-4, and IL-10 from 20 controls and 72 patients with nonischemic CHF by enzyme-linked immunosorbent assay. To investigate the effect of atorvastatin in vivo, CHF patients were either classified into a usual therapy group (n = 35) or usual therapy plus atorvastatin (10 mg/day) group (n = 37). Patient serum levels of IFN-γ and IL-4 were measured at time of admission and 2 weeks after treatment. Peripheral blood mononuclear cells from patients of CHF group were cultured in the presence or absence of atorvastatin (0, 0.4, 1, and 4 μmol/L) in vitro, and IFN-γ and IL-4 levels were detected. Serum levels of IL-12, IL-18, and IFN-γ were significantly higher in the CHF group than in the control group. The levels of IFN-γ and the ratios of IFN-γ:IL-4 were significantly decreased with atorvastatin treatment both in vivo and in vitro, whereas levels of IL-4 did not differ significantly.ConclusionsTh1 polarization exists in patients with CHF, and atorvastatin can modulate the Th1/Th2 response through inhibiting Th1 cytokine production.     

Th2 cytokine-primed airway smooth muscle cells induce mast cell chemotaxis via secretion of ATP

Objective: Mast cell infiltration into airway smooth muscle (ASM) bundle is an important feature of asthma. Extracellular adenosine triphosphate (eATP) contributes to the initiation of airway inflammation. eATP induces mast cells migration by acting through purinergic receptors. CD39 is an ectonucleotidase that degrades ATP to ADP and AMP. Whether eATP participates in the migration of mast cell towards ASM cells is still unknown. Methods: Airway smooth muscle cells (ASMCs) were isolated from C57/BL6J mice sensitized and challenged with OVA. ASMCs were in vitro cultured and stimulated with IL-4?+?IL-13 in the presence or absence of exogenous CD39 or CD39 inhibitor ARL67156. ATP level in the supernatants was measured with ATP content determination kit. CXCL10 concentration in the ASMCs supernatants was measured by ELISA, the mRNA expression of CXCL10 in ASMCs was determined with real-time PCR. Human mast cell line HMC-1 was cultured in Iscove’s-Modified Dubecco’s Medium. The expression of CXCR3 in HMC-1 cells was determined with flow cytometry and real-time PCR, respectively. HMC-1 migration rates were determined with transwell system. Results: In the supernatants of Th2 cytokine-stimulated ASMCs, ATP level was higher than that without stimulation. CD39 decreased, whereas ARL67156 increased ATP level in the supernatants. Both ATP and the supernatants of Th2 cytokine-stimulated ASMCs induced migration of HMC-1 cells. The surface and mRNA expression of CXCR3 in HMC-1 cells, and the mRNA expression and secretion of CXCL10 in ASMCs were increased after stimulation with ATP or Th2 cytokines. All these effects were partially inhibited by CD39. Conclusion: Our data suggested ASMCs in the asthma microenvironment promoted the migration of mast cells via secretion of ATP and the expression of CXCL10/CXCR3 axis. CD39 could reverse this effect and may be a new target for the treatment of asthma.     

羟氯喹抑制紫外线诱导的系统性红斑狼疮CD4+T细胞白细胞介素-10和干扰素-γ的表达

目的 研究紫外线对系统性红斑狼疮(SLE)CD4+T细胞因子的影响和羟氯喹的抑制作用.方法 选择SLE 30例,健康对照10名.磁珠分选SLE患者和健康人的CD4+T细胞,紫外线311 nm窄谱中波紫外线暴露,加入羟氯喹共培养,酶联免疫吸附试验(ELISA)检测培养上清白细胞介素(IL)-10和干扰素-γ的表达水平.采用t检验进行统计学分析.结果 SLE患者CD4+T细胞IL-10表达高于健康对照[(27±4)和(18±3) pg/ml,P=0.011];经45、100 mJ/cm2紫外线暴露后,SLE活动患者CD4+T细胞IL-10表达升高[(27±4)和(77±42) pg/ml,(40±18)和(77±42) pg/ml,P=0.022,P=0.048],经100 mJ/cm2紫外线暴露后,活动患者CD4+T细胞IL-10表达高于稳定患者[(77±42)和(24±4)pg/ml,P=0.029];羟氯喹降低SLE活动患者CD4+T细胞IL-10和干扰素-γ表达[(2.6±4.0)和(17.9±2.3)pg/ml,P=0.018,P=-0.017)];羟氯喹降低经45,100 mJ/cm2紫外线暴露后SLE活动患者T细胞IL-10表达[(40±18)和(22±6)pg/ml,(77±42)和(21±5) pg/ml,P=0.037,P=0.04];羟氯喹降低经100 mJ/cm2紫外线暴露的SLE活动和稳定患者T细胞干扰素-γ表达[(18±3)和(13±14) pg/ml,(19±7)和(12±5) pg/ml,P=0.013,P=0.049].结论 紫外线加重SLE患者体内Th1/Th2细胞因子的比例失衡;羟氯喹抑制了紫外线诱发SLE患者干扰素-γ和IL-10的表达.

Abstract：

Objective To explore the role of hydroxychloroquine (HCQ) in ultraviolet B (UVB)- induced expression of interleukin (IL)-10 and interferon (IFN)-γ from CD4+T cells in patients with systemic lupus erythematosus (SLE). Methods Thirty patients with SLE and 10 healthy controls were enrolled in the study. CD4+ T cells were isolated using magnetic beads from SLE patients and healthy controls. HCQ was added in culture media before and after irradiation with UVB 311 nm narrow band ultraviolet B (NB-UVB). The levels of IL-10 and IFN-γ in the supernatant were detected with enzyme-linked immunosorbent (ELISA). Comparisons between groups were performed by t-test. Results The level of IL-10 was higher in SLE patients [(27±4) pg/ml] than that in healthy controls [(18±3) pg/ml, P=0.011]. After exposure of CD4+T cells to UVB in 45 or 100 mJ/cm2 dosages, the level of IL-10 was increased significantly in patients with active disease (P=0.022, P=0.048). After exposure of CD4+T cells to UVB in 100 mJ/cm2 dosages, the levels of IL-10 was higher in patients with active disease [(77±42) pg/ml] than patients with stable disease [(24± 4) pg/ml, P=0.029]. When CD4+ T cell were cultured with HCQ, IL-10 and IFN-γ levels in patients with active disease [(2.6±4.0), (17.5±2.3) pg/ml] were decreased significantly (P=0.018, P=0.017). HCQ reversed UVB-induced IL-10 expression in active SLE patients after exposure of CD4+T cells to UVB in 45 or 100 mJ/cm2 dosages (P=0.037, P=0.04). HCQ also reversed UVB-induced IFN-7 expression in active SLE patients and stable SLE patients after exposure to CD4+T cells with UVB in 100 mJ/cm2 dosages (P=0.013, P= 0.049). Conclusion UVB can aggravate the imbalance of Th1 and Th2 cytokines. HCQ inhibits UVB-induced IL-10 and IFN-7 expression of CD4+T cells in patients with SLE, especially in patients with active disease.     

特发性血小板减少性紫癜患者治疗前后Th1／Th2水平变化及其临床意义

目的：研究特发性血小板减少性紫癜（ITP）患者药物治疗前后辅助性T淋巴细胞（Th）1/Th2细胞因子水平的变化情况及其临床意义。方法：应用流式细胞仪检测60例ITP患者药物治疗前后干扰素γ（IFN-y）、白细胞介素（IL）-2、IL-4、IL-10水平,分析Th1/Th2细胞因子水平的变化情况,并结合疗效作相关性分析。以60名健康体检者为对照。结果：药物治疗有效的ITP患者治疗后Th1细胞因子IL-2、IFN-1水平较治疗前及对照组均显著升高（P〈0．01）。而Th2细胞因子IL-4及IL-10水平在3组间均无显著性差异（P＞0．051．Th1/Th2比例升高。ITP患者Th1细胞因子IL-2、IFN．叮水平在治疗显效组表达均明显高于良效及进步组和无效组（P〈0．05）,良效及进步组与治疗无效组比较亦有显著性差异（P〈0．05）;经相关性分析,患者的疗效与IFN-γ、IL-2均呈正相关。结论：ITP患者药物治疗后Th1细胞因子IL-2、IFN-γ表达升高,且Th1与ITP患者疗效密切相关。     

Interferon-γ brings additive anti-viral environment when combined with interferon-α in patients with chronic hepatitis C

T-cell hyporesponsiveness may lead to chronicity of hepatitis C virus (HCV) infection. We evaluated whether interferon (IFN)-γ injection can bring a Th1-dominant environment to patients with chronic hepatitis C. Seventeen patients with genotype 1b received natural IFN-α 5MU daily for the first 2 weeks and three times a week for the next 22 weeks followed by natural IFN-γ 1 MU daily for 2 weeks. In 4 of 17 patients (23.5%), alanine aminotransferase (ALT) was normalized and 3 of these 4 patients (75.0%) cleared HCV RNA. β2 microglobulin (BMG), neopterin and soluble (s) Fas increased with IFN-α and increased more with IFN-γ. Serum interleukin (IL)-12, CD4 and CD8 remained unchanged with IFN-α but increased after IFN-α was replaced by IFN-γ. IL-10 was not changed either with IFN-α or γ. Productions of IL-2, IFN-γ and tumor necrosis factor (TNF)-α by peripheral blood mononuclear cells did not change by IFN-α therapy, however, they were enhanced at the end of IFN-γ therapy. Productions of IL-2 and 4 were unaffected. These results show that some immune parameters become Th1-dominant by additional IFN-γ in patients with chronic hepatitis C. Combination of these two IFNs should be explored.     

T-helper Type 1 and 2 Cytokine Levels in Patients with Benign and Malignant Salivary Gland Tumors

Background: Salivary gland tumors are among malignancies that have high recurrence rate. Immune responses in salivary gland tumors have not been well elucidated. T helper type 1 (Th1) and Th2 cytokines have been reported to play a role in the outcome of head and neck cancers. Objective: To evaluate the serum levels of interferon gamma (IFN- γ), as the hallmark of Th1 cytokines, and interleukin-4 (IL-4), as the hallmark of Th2 cytokines, in patients with benign and malignant salivary gland tumors in comparison with healthy controls. Methods: Fifty patients with benign and 14 patients with malignant salivary gland tumors, as well as 23 healthy individuals were recruited. Serum levels of IFN-γ and IL-4 were measured using ELISA method. Nonparametric tests were used for data analysis. Results: Serum levels of IFN-γ and IL-4 were found not to be significantly different in patients compared to the control group (0.68 ± 0.29 vs. 1.03 ± 0.57 pg/ml, p=0.58 for IFN-γ, 4.57 ± 1.57 vs. 4.41 ± 1.31 pg/ml, p=0.28 for IL-4). IFN-γ and IL-4 serum levels were also not significantly different between patients with benign and malignant salivary gland tumors (p=0.54 and p=0.86, respectively). Conclusion: The systemic levels of IL-4 and IFN-γ seem not to be associated with salivary gland tumor in our study. Investigation of other cytokines produced by Th1 and Th2 cells are warranted.     

HLA-DRB1＊15及相应位点下Th1／Th2细胞相关因子对乙肝疫苗免疫效果的影响

目的探讨广西人群HLA—DRB1＊15基因及相应位点下Th1／Th2细胞相关因子IFN-γIL-4对乙肝疫苗免疫应答水平的影响。方法选取完成重组乙型肝炎疫苗标准全程接种的广西籍汉族健康大学生中抗-HBsS／N值〈10mIU／ml的无、弱应答者80名（A组）作为研究对象,随机选取抗-HBsS／N值〉10mIU／ml的中、强应答者62名（B组）作为对照。应用PCR—SSP进行HLA-DRB1＊15等位基因的检测,采用酶联免疫吸附试验（ELISA）检测血清中Th1／Th2细胞相关因子干扰素-γ（IFN-γ）、白细胞介素-4（IL-4）。结果①A组HLA—DRB1＊15基因表达频率为11．25％,显著低于B组的36．67％（P=0．001）;②A组中IFN-γ的平均表达水平为（6．28±6．84）pg／ml,显著低于B组（16．28±10．05）pg/ml（P=0．000）;③A组的IL-4平均表达水平为（2．36±1．91）pg／ml。显著低于B组（8．50±6．68）pg／ml（P=0．000）;④HLA—DRB1＊15阳性组IFN-γ平均表达水平为（13．82±9．89）pg／ml,显著高于HLA—DRB1＊15阴性组（9．76±9．54）pg／ml（P=0．029）;⑤HLA-DRB1＊15阳性组IL-4平均表达水平为（5．81±4．27）pg／ml,阴性组IL-4平均表达水平为（4．82±5．84）pg／ml,两组间差异无统计学意义（P=0．207）。结论①HLA—DRB1＊15基因可能是促进广西人群乙肝疫苗免疫应答的相关基因;②Th1／Th2细胞相关因子IFN-1、IL-4的表达水平可能影响机体乙肝疫苗的免疫效果;③HLA—DRBB1＊15基因可能是通过影响Th1细胞相关因子IFN-γ的表达水平,而不是通过影响Th2细胞相关因子IL-4的表达水平来影响乙肝疫苗的免疫应答。