红桂木凝集素对Jurkat T淋巴细胞生长的影响

目的 研究红桂木凝集素(ALL)对Jurkat T淋巴细胞生长的影响.方法 将ALL单独作用于CD4+T淋巴细胞系Jurkat E6-1细胞株,WST-8比色法检测细胞增殖;倒置显微镜观察细胞生长变化;酶联免疫夹心法(ELISA)检测IL-2、IL-10和IFN-γ的分泌水平.结果 ALL(0.36～360 μg/ml...     

Effect of Interleukin-1β on the Elevation of Cytoplasmic Free Calcium of the Cultured Hippocampal Neurons Induced by L-Glutamate

Ｃｏｍｐｌｉｃａｔｅｄｍｏｄｕｌａｔｉｎｇｍｅｃｈａｎｉｓｍｓａｒｅｉｎｖｏｌｖｅｄｉｎｔｈｅｎｅｔｗｏｒｋｂｅｔｗｅｅｎｎｅｒ－ｖｏｕｓａｎｄｉｍｍｕｎｅｓｙｓｔｅｍ．Ｉｎｔｅｒｌｅｕｋｉｎ－１（ＩＬ－１）,ａｓａｎｉｍｐｏｒｔａｎｔｃｙｔｏｋｉｎ...     

IL-17调控IL-6/IL-6R/JAK1/STAT3信号通路影响喉癌细胞的侵袭和转移

目的 研究白介素(IL)-17通过IL-6/1L-6R/JAK1/STAT3信号通路调控人源性高分化喉癌细胞(Hep-2)侵袭、转移.方法 以Hep-2细胞为研究对象,设IL-17刺激剂0、1、50、100 ng/ml浓度组,Westem blot法检测不同分组在IL-17的刺激下,Hep-2细胞中IL-6、IL-6R、JAK1、p-JAK1、STAT3、p-STAT3的表达变化.迁移、侵袭实验观察IL-17的刺激对Hep-2细胞侵袭、迁移的影响.结果 Western blot实验中,在IL-17刺激下,1、50、100 ng/ml浓度组较0 ng/ml浓度组Hep-2细胞的IL-6、IL-6R、p-JAK1、p-STAT3的表达明显增加(p＜0.01),50、100 ng/ml浓度组较1 ng/ml浓度组Hep-2细胞的IL-6、1L-6R、p-JAK1、p-STAT3的表达明显增加(P＜0.01),100 ng/ml浓度组较50 ng/ml浓度组Hep-2细胞的IL-6R、p-JAK1、p-STAT3的表达明显增加(P＜0.01);各组间JAK1、STAT3的表达无明显变化.侵袭与迁移实验显示IL-17可以促进Hep-2细胞的侵袭和迁移.结论 IL-17可能通过IL-6/IL-6R/JAK1/STAT3信号通路促进Hep-2细胞的侵袭和转移.     

Cytokine profile of HIV-positive Kaposi's sarcoma derived cells in vitro

Kaposi's sarcoma (KS) is the most frequent neoplastic complication observed in HIV-infected patients. Cutaneous KS is the most common manifestation but visceral and lymph node involvement may occur. HIV-infection does not only lead to a decrease of certain cell types (CD4 T-lymphocytes), but also modifies the function of non-infected cells such as B-lymphocytes and NK-cells by upregulating cytokine release of IL-1, IL-6, GM-CSF, IFN-gamma and TNF-alpha. These multifunctional mediators show both autocrine and paracrine proliferative effects on normal endothelial cells and AIDS-related KS-cells. Using ELISA-, RIA- and IRMA-techniques we analysed the influence of seven cytokines (IL-1beta, IL-6, TNF-alpha, GM-CSF, IFN-alpha, IFN-beta, IFN-gamma) and the soluble IL-2 receptor (sIL-2R) on the growth of eight different KS-derived cell lines compared with eight fibroblast cell lines, established from skin biopsies of HIV-positive individuals. Furthermore, we analysed the dose-dependent effect of the above mentioned cytokines on KS-derived cells in vitro. The KS-derived cell culture medium demonstrated significantly higher concentrations than the fibroblast cell lines in view of the following cytokines: sIL-2R, IL-1beta, IL-6, TNF-alpha, GM-CSF, IFN-gamma (p<0.05). The most pronounced differences between KS-cells and fibroblasts were observed for IL-1beta and IFN-gamma. The antiproliferative effect of IFN-beta and IFN-gamma began at a concentration of 20 and 50 IU/ml, respectively, whereas for IFN-alpha an antiproliferative effect was observed at a concentration of 100 U/ml. Furthermore we observed a proliferative effect in low concentrations (2-5 IU/ml) of IFN-gamma in our in vitro model     

IL-2-PE66~(4Glu)融合蛋白生物学活性测定

ＩＬ－２－ＰＥ６６４Ｇｌｕ是由白介素２同改构的绿脓杆菌外毒素通过基因融合构成的嵌合蛋白。我们研究了它对ＣｏｎＡ诱导的小鼠脾母细胞和ＰＨＡ激活的人外周血淋巴细胞的细胞毒活性，结果显示其半数抑制剂量（ＬＤ５０）分别是５０ｎｇ／ｍｌ和２０ｎｇ／ｍｌ，而对ＩＬ－２Ｒ细胞则无明显的作用；同时，探讨了ＩＬ－２的浓度、ＭＴＴ浓度及作用时间对实验结果的影响     

L1210细胞表面IL—2受体的表达和以IL—2为导向的免疫？…

目的 证明Ｌ１２１０细胞表面表达ＩＬ－２受体（ＩＬ－２Ｒ）,并以此为基础建立检测以ＩＬ－２为导向的免疫毒素的杀伤细胞活性的体内、体外实验模型。方法 采用免疫荧光染色及流式细胞测定技术,测定Ｌ１２１０细胞表面ＩＬ－２Ｒ。用ＭＴＴ法测定ＩＬ－２与两种由突变改型的绿脓杆菌毒素片段构建的两种融合蛋白（ＩＬ－２－ＰＥＺＮＭ和ＩＬ－２－Ｋ－ＰＥＺＮＭ）的体外杀伤细胞活性;以腹腔注射Ｌ１２１０细胞诱发小鼠腹水瘤     

结直肠癌细胞所致免疫抑制及免疫抑制分子分泌模式的研究

目的探讨结直肠癌细胞分泌的免疫抑制物质及抑制免疫功能的模式。方法制备结直肠癌Colon26细胞培养上清,采用MTT法检测其对T细胞转化和NK细胞的影响,直接免疫荧光FCM法检测对IL-2Rα、CD3ε+ζ+及CD3ε-ζ+表达的影响;定量ELISA法测定上清中TGF-β1、VEGF、IL-4、IL-6、IL-10和PGE2含量。结果 Colon26细胞可使5项免疫功能指标明显受抑制,抑制率分别为37.88%±7.38%、68.30%±10.44%、69.60%±5.15%、68.15%±2.17%、23.34%±2.86%。Colon26细胞可稳定分泌免疫抑制分子,以TGF-β1含量最高,为(1295.23±29.85)pg/ml;VEGF、IL-4、IL-6、IL-10、PGE2分泌量分别为(29.18±1.90)pg/ml、(27.70±0.70)pg/ml、(26.55±0.60)pg/ml、(29.52±2.50)pg/ml、(9.69±0.42)pg/ml。结论 Colon26细胞对T细胞增殖、活化及信号转导水平的抑制接近70%,对NK杀伤及ζ链介导的活化信号水平的抑制约30%。结直肠癌细胞可能通过分泌以TGF-β1为主的多种免疫抑制分子抑制NK细胞和T细胞免疫功能,介导肿瘤的免疫逃逸。     

乌司他丁对肢体缺血再灌注致肺功能损伤防护效果研究

目的：观察乌司他丁对肢体缺血再灌注（LIR）致肺功能损伤的防护效果并探讨其保护机 制。方法: 选择应用止血带的下肢手术病例30例,随机分为对照组和乌司他丁组,各15例。对照 组在上止血带前10min静滴生理盐水100mL;乌司他丁组则在相同时间内静滴乌司他丁注射液 （0.6×104U/kg）100mL,于上止血带前（T0）、上止血带后1h（T1）、松止血带后0.5h（T2）、2h（T3）、6h （T4）、24h（T5）取血进行血气分析,计算P（A-a）DO2和OI值,并测定血浆中NO、ET-1、IL-6浓度 值。结果: 对照组在T4时点P（A-a）DO2值较T0点增大（P<0.01）,乌司他丁组各时点组内变化无统 计学意义（P>0.05）;乌司他丁组T4时点的差值增大幅度小于对照组（P<0.05）。各组OI值变化与P （A-a）DO2值相反,而两组PaCO2值在T2、T3时都有升高（P<0.01）,T4时点恢复,且两组间差异无统 计学意义（P>0.05）。两组T1、T2、T3、T4时血浆NO浓度下降,乌司他丁组下降幅度小于对照组,且 在T3、T4时NO浓度高于对照组（P<0.01）。而两组血浆ET-1、IL-6浓度变化则刚好相反。结论：乌 司他丁通过抑制炎性细胞与血管内皮细胞黏附、抑制ET-1释放、减轻NO消耗、抑制体液炎性因子 的过度作用,减轻肢体缺血再灌注对肺的损伤,改善LIR后的肺氧合功能。     

Effect of Diallyl Trisulfide on the Activation of T Cell and Macrophage－mediated Cytotoxicity

(冯作化)(张桂梅)(郝天玲)(周斌)(张慧)(姜志尧)ＥｆｆｅｃｔｏｆＤｉａｌｌｙｌＴｒｉｓｕｌｆｉｄｅｏｎｔｈｅＡｃｔｉｖａｔｉｏｎｏｆＴＣｅｌｌａｎｄＭａｃｒｏｐｈａｇｅ－ｍｅｄｉａｔｅｄＣｙｔｏｔｏｘｉｃｉｔｙ￥ＦＥＮＧＺｕｏ－ｈｕａ；ＺＨＡＮＧＧｕｉ－...     

Änderungen in den Lymphozytensubpopulationen,in der Expression von HLA-DR Antigen und Interleukin-2 Rezeptor bei Patienten mit Lupusnephritis

In this study peripheral blood mononuclear cells were tested for T lymphocytsubpopulations, interleukin-2 receptor (IL-2R) and HLA-DR antigen by monoclonal antibodies in 14 LN patients. In comparison with normal controls, 14 LN patients showed a decrease of T₄ lymphocyte (0.01<P<0.05) and increase of T₈ cells (P<0.01) with reduction of T₄/T₈ ratio (P<0.0l). The expression of HLA-DR cells increased (P<0.0l), the expression of IL-2R activited by PHA significantly decreased (P<0.0l), while nonactivited IL-2R expression significantly increased (P<0.01). T₄/T₈ ratio was significantly correlated with activited IL-2R expression (P<0.01, r = 0.6599). The results indicated that there was a immunological defect in LN patients. The pathogenesis of LN might be heterogeneous.     

Investigation on signal transduction pathways after H1 receptor activated by histamine in C6 glioma cells: Involvement of phosphatidylinositol and arachidonic acid metabolisms

BackgroundInformation related to histamine-induced cellular responses in C6 glioma cells through second messenger pathways has not been fully studied, especially the involvement of arachidonic acid (AA) metabolism. In addition, specific labeled ligand binding to histamine receptor sites still needs to be clarified.MethodsLabeled mepyramine ligand was used to study its binding sites; [³H] inositol was used to detect inositol 4-phosphate (IP₁) formation, and fura-2/AM was used to detect intracellular free calcium ion ([Ca²⁺]i) level activated by the phosphatidylinositol-phospholipase C (PI-PLC) pathway. Also, labeled AA was used to detect the metabolism of AA and its metabolites release via the activation of phospholipase A2 in the presence of histamine.ResultsC6 glioma cells incubated with histamine in the presence of 10 mM LiCl for 60 minutes induced an increase of IP₁ and glycerophosphoric-inositol (GPI) accumulation. In addition, histamine caused an increase of extracellular AA with its metabolite release, eliciting a transient and sustained increase of free [Ca²⁺]i. The sustained increase of [Ca²⁺]i was almost or completely blocked by La³⁺ and excess ethylene diamine tetraacetic acid. The calcium ion influx associated with the sustained phase required the presence of histamine on the receptor sites, and could be blocked by a H₁ antagonist, chlorpheniramine.ConclusionC6 glioma cells possess histamine H₁ receptors that have affinity towards [³H]mepyramine binding, and are coupled to PI-PLC to generate inositol phosphates and to increase [Ca²⁺]i, and they are coupled to phospholipase A2 (PLA2) to generate GPI and AA with its metabolite release. The transient increase in [Ca²⁺]i can be attributed to Ca²⁺ release from intracellular stores, whereas the sustained increase in [Ca²⁺]i is due to influx of extracellular calcium ions. The sustained increase in [Ca²⁺]i plays a role in the activation of histamine receptor-coupled PLA2.     

Effects of cryptotanshinone on immune functions in rats with adjuvant arthritis

Background Cryptotanshinone （CT） was originally isolated from the dried roots of Salvia militorrhiza, an herb that is used extensively in Asian medicine and the extracts of this herb have been used in the treatment of several pathologies, including cardiovascular diseases, hematological abnormalities, hepatitis, and hyperlipidemia, but no studies had been carried on the treatment for rheumatic diseases with it. This study aimed to investigate the effects of cryptotanshinone on immune functions in rats with adjuvant arthritis （AA）. Methods Complete Freund＇s adjuvant was used to induce AA in rats. Thymus and spleen was aseptically taken from normal rats and the AA rats. Then a thymus lymphoid cell suspension, splenic lymphoid cell suspension and peritoneal macrophage cell suspension were prepared. After adding CT （0.1 ug/ml, 1.0 ug/ml, 10 ug/ml, 100 ug/ml, 1000 ug/ml） into the suspension, T and B lymphocytes proliferation was determined by 3-（4,5-2 dimethylthiazal-2yl）2,5- diphenyltetrazoliumbromide （MTT） assay. And the activities of interleukin-1 （IL-1） and IL-2 were measured by the mouse lymphocytes proliferation assay. Results Thymic T and splenic B lymphocyte proliferation of the AA rat was significantly lower, and could be stored through using CT in vitro. CT （100ug/ml and 1000ug/ml） increased T or B lymphocytes proliferation in vitro （P 〈0.01）. In AA rats, the levels of IL-1 released by abdominal PMφ significantly increased whereas the level of IL-2 released by T cells decreased in vitro. CT （1000 pg/ml） decreased the production of IL-1 and promoted production of IL-2 in vitro （P 〈0.05）. Conclusions CT can ameliorate the abnormal immunological functions in AA rats.     

重症肌无力患者外周血中IL-21的表达 及其与血清抗AChR抗体类别转换的关系

目的：探讨白细胞介素(IL)-21在重症肌无力(MG)发病中的作用及其对血清抗乙酰胆碱受体(AChR)抗体类别转换的影响。方法：采集26例MG患者和18例健康对照者的外周血,应用ELISA技术检测外周血血清中抗AChR-IgG及其亚型IgG1,IgG2,IgG3的水平以及IL-21的浓度,利用RT-PCR技术检测外周血单个核细胞上IL-21R mRNA的表达水平,采用流式细胞学技术检测其中8例患者B细胞上IL-21R的表达水平,并分析它们之间的关系。结果：MG患者组血清中IL-21浓度（31.686±8.499 pg/mL）高于正常对照组（15.147±6.366 pg/mL）,差异具有统计学意义（P＜0.01）;MG患者组 PBMCs上IL-21R mRNA的表达（0.139±0.052）高于正常对照组(0.101±0.022),差异具有统计学意义（P＜0.05）;但二者在眼肌型和全身型亚组中差异均无统计学意义（P＞0.05）。8例MG患者B细胞上的IL-21R的表达水平(1.074±0.375)高于正常对照组(0.389±0.391),差异具有统计学意义（P＜0.05）。抗AChR-Ab阳性患者血清IL-21浓度与抗AChR-IgG水平呈正相关,相关系数为0.689（P＜0.05）,但其与IgG1,IgG2,IgG3亚型的水平均无相关性（P＞0.05）;PBMCs上IL-21R mRNA的表达与血清抗AChR-IgG及其IgG1,IgG2,IgG3亚型的水平均无相关性（P＞0.05）;B细胞上IL-21R的表达与抗AChR-IgG及IgG1,IgG3亚型水平呈正相关（分别为P＜0.05,P＜0.01,P＜0.05）,而与抗AChR-IgG2的水平无相关性（P＞0.05）。结论：IL-21可能通过作用于B细胞上的IL-21R,影响MG患者血清中抗AChR抗体向IgG1和IgG3亚型转换,从而对MG发病起促进作用。     

结核杆菌耐热抗原和磷酸类抗原对人外周血 γδ T细胞活化和增殖的比较

目的:比较结核杆菌耐热抗原(Mtb-HAg)和磷酸类抗原(HDMAPP)刺激正常人外周血γδT细胞活化和增殖的特点。方法:健康成人外周血单个核细胞(PBMC,1×106/ml),分别加Mtb-HAg(5μg/ml)和HDMAPP(2×10-9mol/ml)进行刺激,同时给予IL-2(50 u/ml)维持细胞增殖,另外设立只加IL-2的对照组。培养10 d后,采用抗CD3-FITC和抗TCRγδ-PE荧光抗体标记细胞,流式细胞术检测γδT细胞的比例。结果:正常人PBMC经Mtb-HAg刺激扩增后γδT细胞在扩增细胞中的比例明显低于HDMAPP组(P0.01),均明显高于IL-2对照组(P0.01)。各个体对2种抗原刺激扩增γδT细胞呈线性正相关关系(R2=0.855 1,P0.01)。结论:Mtb-HAg和HDMAPP均可优势激活人γδT细胞,且后者较前者有更强的活性。     

5-羟色胺受体与调节性T 细胞在抑郁症免疫功能紊乱中的关联作用

目的 观测抑郁症患者免疫失衡的特征,从5-羟色胺受体(5-HT1aR)和调节性T 细胞表达变化的关系,探讨抑郁症免疫失衡的可能机制.方法 采集27例抑郁症患者外周血,利用ELISA方法测定血清细胞因子IL-2,IL-10,TGF-β1浓度,逆转录-聚合酶链反应(RT-PCR)方法检测患者5-HT1aR和FoxP3的mRNA水平,免疫磁珠分离调节性T细胞,共聚焦显微镜观察调节性T细胞5-HT1aR受体和FoxP3的共表达,并与正常对照组进行对照.结果 与正常对照组标本相比,抑郁症患者血清IL-2表达水平上调[(184.681±8.472)pg/ml,(82.845±12.292)pg/ml],IL-10[(6.765±0.611)pg/ml,(9.593±0.921)pg/ml],TGF-β1[(14.042±2.170)ng/ml,(20.981±3.98)ng/ml]的表达水平降低(均P <0.01);外周血中调节性T细胞数量减少[(13.139±4.587)107个,(20.583±3.484)107个],单个核细胞5-HT1aR和FoxP3的mRNA表达水平降低(均P <0.01);同时通过共聚焦显微镜观察到调节T细胞上的5-HT1aR及FoxP3表达减弱.结论 抑郁症患者中存在免疫失衡现象,5-HT1aR通过影响调节性T细胞在抑郁症患者免疫失衡的病理生理机制发挥着重要的作用.     

Effects of Qiwei Baizhu San in inhibiting replication of human rotavirus in vitro) in inhibiting replication of human rotavirus in vitro

Qiwei Baizhu San was found to have an inhibitory effect on human rotavirus at monolayers of MA₁₀₄ cells. A 50% reduction in plaque number, a 10^1.86 TCID₅₀ decrease in viral replication index and an around 60% inhibition in viral RNA synthesis were observed at concentration of 100 mg/ml. Furthermore, the cytotoxicity of the decoction was low, while its promoting effect on growth and proliferation of the culture cells was observed at the concentrations of 12.5~50 mg/ml. The decoction was also found to have effects in prolonging the survival time of infected cells with rotavirus and promoting the regeneration of the infected cells.     

IL-1β对人分泌中期子宫内膜细胞分泌MMP-9及TIMP-3蛋白的影响

目的初步研究白介素-1β(IL-1β)对离体培养的分泌中期子宫内膜细胞分泌基质金属蛋白酶-9(MMP-9)及其特异性组织抑制物-3(TIMP-3)的影响。方法原代培养人分泌中期子宫内膜细胞,利用粘附式细胞仪570型,采用间接免疫荧光法检测IL-1β对内膜细胞分泌MMP-9和TIMP-3的影响。结果(1)MMP-9:空白对照组为1491.38±68.95,50U/ml组为1592.40±47.57,100U/ml组为1702.63±75.31,500U/ml组为1994.49±52.98,1000U/ml组为2347.58±45.87。随着IL-1β的浓度增加,原代培养的分泌中期子宫内膜细胞分泌MMP-9表达量呈浓度依赖性显著升高(P<0.05);(2)TIMP-3:空白对照组为1643.31±61.29,50U/ml组为1597.27±49.07,100U/ml组为1443.93±81.23,500U/ml组为1343.28±54.80,1000U/ml组为1157.85±47.95。随着IL-1β的浓度增加,原代培养的分泌中期子宫内膜细胞分泌TIMP-3表达量呈浓度依赖性显著下降(P<0.05)。结论IL-1β通过促进MMP-9分泌,抑制TIMP-3分泌,使细胞外基质降解,有利于绒毛滋养层细胞侵入。     

IL-2受体与CD4阳性细胞在良恶性淋巴增生病变组织中的数量、分布及意义

对50例良恶性淋巴增生病变组织及其短期培养细胞进行免疫表型研究,重点观察白细胞介素-2受体及CD4阳性细胞的数量、分布及其变化情况。结果发现:①多种良恶性淋巴增生病变组织中均有不等量的白细胞介素-2受体及CD4抗原的表达;②部分肿瘤性及非肿瘤性CD4阳性细胞、B细胞及R-S细胞上亦有白细胞介素-2受体存在,而在CD1或CD8阳性细胞上则未见;③正常人淋巴细胞经PHA刺激并发生增殖后所形成的细胞克隆亦有较多的白细胞介素-2受体和CD4抗原表达。提示:尽管白细胞介素-2受体不是某一类细胞的特异性抗原标记,但与细胞的免疫表型有一定关系。文内还结合文献扼要讨论了白细胞介素-2、白细胞介素-2受体及辅助性T淋巴细胞在淋巴瘤发病中的作用和意义。     

单肺麻醉期间尿胰蛋白酶抑制剂对萎陷肺保护作用的研究

目的 探讨尿胰蛋白酶抑制剂对单肺通气麻醉期间萎陷肺肺损伤的保护及作用机制.方法 选择单肺通气下食道癌开胸手术患者30例做为研究对象,ASAⅡ～Ⅲ级,随机分为对照（C组,n=15）和尿胰蛋白酶抑制剂组（U组,n=15）.尿胰蛋白酶抑制组给予尿胰蛋白酶抑制总量30万单位/100 mL在麻醉诱导后采用微量泵30 min输注完.对照组则输入100 mL生理盐水.分别于单肺通气前（T1）,单肺通气后1 h（T2）,单肺通气后2h （T3）以及手术结束（T4）4个时间点用纤维支气管镜行术侧肺叶灌洗.用ELISA法测定肺泡灌洗液中IL-6、IL-8及TNF-α含量的变化,并用瑞氏法染色进行支气管肺泡灌洗液（BALF）中中性粒细胞（PMN）计数.结果 与基础值T1相比,T3、T4对照组组与U组IL-6、IL-8、TNF-α含量及白细胞计数明显升高,但组间对比U组比C组升高低（P＜0.05）.结论 尿胰蛋白酶抑制剂对单肺通气期间萎陷肺的肺损伤具有一定的保护作用.     

白细胞介素1β促进GH3细胞中人生长激素基因表达的机制

目的研究白细胞介素1β(IL-1β)对大鼠垂体GH3细胞中人生长激素(hGH)基因启动子活性的影响及其可能的调节机制.方法采用荧光素酶报告基因方法.建立含hGH基因启动子(-484～30 bp)和荧光素酶融合基因的稳定转染GH3细胞株,然后加入IL-1β或IL-1β与胞内信号转导途径的抑制剂,通过检测细胞培养液和细胞裂解液中GH的含量以及GH3细胞内荧光素酶的变化,反映IL-1β对GH分泌、合成、hGH基因启动子活性的影响及可能的作用机制.结果IL-1β(10～104U/ml)均能刺激大鼠垂体GH3细胞中GH的分泌和合成,102～104 U/ml的IL-1β还能剂量依赖性地增加细胞中荧光素酶的表达,最高达对照组的161%;在胞内信号转导抑制剂中,丝裂原活化蛋白激酶(MAPK)特异性抑制剂PD98059(40μmol/L)和p38MAPK抑制剂SB203580(5 μmol/L)均能完全阻断IL-1β促进GH3细胞中荧光素酶表达的作用,磷脂酰肌醇3激酶(PI3-K)抑制剂LY294002(10 μmol/L)能部分抑制IL-1β的促进作用;Pit-1蛋白过表达和表达被抑制对IL-1β的促进作用没有影响;在含不同长度hGH基因启动子序列的质粒中,IL-1β促进GH3细胞中hGH基因启动子活性的关键序列在-196～-132 bp之间.结论IL-1β能增强垂体GH3细胞中hGH基因的启动子的活性,此作用可能需要激活细胞内依赖MAPK、p38MAPK和PI3-K等激酶的信号转导途径完成,并与hGH基因上游-196～-132 bp启动子序列密切相关,但与Pit-1蛋白无关.