雷公藤多甙对IL-1β诱导大鼠滑膜细胞株RSC-364增殖和IL-6分泌的影响

目的:观察雷公藤多甙对IL-1β诱导大鼠滑膜细胞株RSC-364增殖和IL-6分泌的影响,探讨其治疗类风湿性关节炎的作用机理.方法:培养大鼠滑膜细胞株RSC-364,运用CCK-8法检测不同剂量的雷公藤多甙对IL-1β诱导大鼠滑膜细胞株RSC-364增殖的影响,酶联免疫吸附实验检测细胞株培养上清中的IL-6的含量.结果:经过IL-1β诱导大鼠滑膜细胞株RSC-364,在不同浓度的雷公藤多甙的作用48h后,其增殖明显受到抑制,并呈剂量依赖性.同时各剂量组均可抑制IL-1β诱导大鼠滑膜细胞株RSC-364分泌炎性因子IL-6的分泌.结论: 雷公藤多甙抑制IL-1β诱导大鼠滑膜细胞株RSC-364的过度增殖和IL-6的分泌,这可能是其治疗类风湿性关节炎的作用机理之一.     

雷公藤多甙对IL-1β诱导大鼠滑膜细胞株RSC-364表达JNK1蛋白的影响

目的探讨雷公藤多甙（Tripterygium Glycosides，TG）对IL-1β诱导大鼠滑膜细胞株RSC-364 JNK1的影响，进一步阐明雷公藤多甙治疗类风湿性关节炎的作用机制。方法运用Western—blot检测不同浓度的雷公藤多甙（0、5、10、20mg／L）对IL-1β诱导大鼠滑膜细胞株RSC．364JNK1蛋白的表达。结果雷公藤多甙明显地抑制IL-1β诱导大鼠滑膜细胞株RSC-364对JNK1蛋白的表达。结论雷公藤多甙抑制IL—1β诱导大鼠滑膜细胞株RSC．364对JNK1蛋白的表达，可能是其治疗类风湿性关节炎的重要作用机制之一。     

八肽胆囊收缩素对大鼠滑膜细胞株RSC-364分泌IL-6的影响

探讨八肽胆囊收缩素（CCK-8）对大鼠滑膜细胞株RSC-364分泌IL-6的调控作用。应用ELISA法观察不同浓度梯度的CCK-8对在TNF-α或IL-1β诱导下的RSC-364分泌IL-6水平的影响。结果显示：10^-6mol/L,10^-8mol/L浓度的CCK-8可分别促进TNF-α或IL-1β诱导24h后RSC-364细胞株分泌IL-6，而应用CCK受体拮抗剂丙谷胺则可明显抑制这种刺激效应，提示CCK-8可调节滑膜细胞分泌IL-6，在类风湿性关节炎的发病机制中可能起潜在的调控作用。     

CCK-8通过调节κB活性促进大鼠滑膜细胞株RSC-364 IL-6转录

目的观察硫酸化八肽胆囊收缩素(sCCK-8)对TNF-α诱导大鼠滑膜细胞株RSC-364 IL-6基因表达的影响及核因子NF-κB活性,以探讨CCK-8对类风湿性关节炎(RA)的调控机制。方法大鼠滑膜细胞株RSC-364经TNF-α、sC-CK-8、CCK受体拮抗剂丙谷胺及溶剂单独或联合应用孵育3 h,用RT-PCR检测细胞IL-6 mRNA的表达,孵育1 h,用电泳迁移率检测NF-κB活性,孵育30 min,用Western blot检测胞浆I-κB蛋白表达。结果sCCK-8(10-8~10-6mol/L)明显增加TNF-α诱导的IL-6 mRNA表达及NF-κB活性,呈剂量依赖性,降低胞浆中I-κB蛋白水平,并可被丙谷胺所拮抗。结论sCCK-8在类风湿性关节炎(RA)发病过程中可能具有调控作用。     

八肽胆囊收缩素对TNF-α诱导的大鼠滑膜细胞株RSC-364 IL-6的作用及其可能的分子机制(英文)

目的: 观察硫酸化八肽胆囊收缩素（sCCK-8）对TNF-α诱导大鼠滑膜细胞株RSC-364 IL-6 mRNA 表达及核因子NF-κB的影响及其可能的受体机制。方法: 大鼠滑膜细胞株RSC-364经TNF-α(10　μg/L)、sCCK-8(10^-8-10^-6 mol/L)、CCK受体拮抗剂丙谷胺（2 mg/L）及溶剂单独或联合孵育3 h，用RT-PCR检测细胞IL-6、CCK-AR及CCK-BR mRNA的表达，孵育1 h，用电泳迁移率检测NF-κB活性，孵育30 min，用Western blotting检测胞浆IκB蛋白表达。结果: RSC-364细胞固有表达CCK-A/B受体，sCCK-8（10^-8-10^-6 mol/L）使IL-6、CCK-AR和CCK-BR mRNA表达进一步增高，明显增加TNF-α诱导的NF-κB活性，降低胞浆中IκB蛋白水平，并可被丙谷胺所拮抗。结论: sCCK-8通过NF-κB途径上调TNF-α诱导的大鼠滑膜细胞IL-6 mRNA表达，此作用可能通过滑膜细胞上的CCK受体实现，提示CCK-8在类风湿性关节炎（RA）发病过程中可能具有调控作用。     

IL-10、IL-17及IL-18在肝细胞肝癌中的表达特点及其临床意义

目的 检测IL-10、IL-17及IL-18在肝细胞肝癌中的表达特点,为肝细胞肝癌的诊断与治疗提供实验依据.方法 采用RT-PCR方法检测肝癌以及癌旁组织中IL-10、IL-17及IL-18mRNA水平的表达,采用Western Blot、免疫组化方法检测肝癌以及癌旁组织中IL-10、IL-17及IL-18蛋白水平的表达;采用ELISA检测肝癌细胞株BEL-7402、HepG2中IL-10、IL-17及IL-18的释放水平.结果 IL-10、IL-17在肝癌组织及细胞株中高表达,与血清AFP检测结果呈正相关;IL-18在肝癌组织及细胞株中不表达或者少量表达,与血清AFP检测结果呈负相关.结论 IL-10、IL-17的过表达和IL-18的沉默与肝细胞肝癌的发生密切相关,IL-10、IL-17的过表达可作为肝细胞肝癌诊断的重要标志.     

脂多糖刺激下大鼠腹膜间质细胞IL-18、IL-6的表达和氧化应激的影响

目的:研究脂多糖刺激下大鼠腹膜间皮细胞(RPMC)IL-18、IL-6和氧化应激产物丙二醛(MDA)的表达。方法:原代培养RPMC,用不同浓度脂多糖(1、10、100 mg/L)刺激RPMC 6 h;10 mg/L脂多糖刺激RPMC 3、6、12、24 h。用real time-PCR法检测IL-18mRNA的表达,ELISA法检测细胞上清液中IL-18和IL-6的蛋白水平,硫代巴比妥酸法检测细胞中MDA的含量。结果:与正常对照组比较,脂多糖刺激下RPMC IL-18、IL-6和MDA的表达明显增加(P<0.05),且呈浓度依赖性;随着刺激时间的延长,上述指标呈递增趋势,IL-18于12 h达高峰。结论:脂多糖刺激下RPMC促炎症因子IL-18、炎症因子IL-6及氧化应激产物MDA的表达均增加,引起持续放大的炎症氧化反应,损伤腹膜导致超滤失败。     

穿山龙总皂苷含药血清对IL-17和TNF-α诱导的大鼠滑膜细胞株RSC-364NF-κB p65活性、STAT3及VEGF mRNA表达的影响

目的观察穿山龙总皂苷含药血清对IL-17和TNF-α联合诱导的大鼠滑膜细胞株RSC-364 NF-κB p65活性、STAT3表达及VEGF mRNA表达水平的影响,探讨穿山龙总皂苷抑制类风湿性关节炎血管新生的作用机制。方法制备穿山龙总皂苷和雷公藤(阳性对照)含药血清;取大鼠滑膜细胞株RSC-364经IL-17(10μg/L)和TNF-α(10μg/L)、穿山龙总皂苷含药血清、雷公藤多甙片含药血清单独或联合应用孵育,孵育24 h,提取各组细胞核蛋白用于TransAMTMNF-κB p65活性检测试剂盒检测NF-κB p65的DNA结合活性;提取各组细胞总蛋白后应用Western blot方法观察STAT3蛋白的表达;采用实时荧光定量PCR方法检测各组细胞VEGF mRNA的表达情况。结果 IL-17+TNF-α诱导的细胞模型组中NF-κB p65的DNA结合活性、STAT3蛋白表达及VEGFmRNA表达水平均显著高于空白对照组(P<0.01,P<0.01,P<0.05);与细胞模型组相比,雷公藤含药血清组、穿山龙总皂苷含药血清组的NF-κB p65 DNA结合活性、STAT3蛋白表达及VEGF mRNA表达水平均显著降低(P<0.01,P<0.01,P<0.05),且2组之间比较无显著性差异(P>0.05)。结论本研究证实穿山龙总皂苷含药血清可以抑制NF-κB p65的DNA结合活性及STAT3蛋白的表达,考虑穿山龙总皂苷通过上述信号转导途径来调控血管新生关键因子VEGF的产生,进而抑制RA血管新生。     

IL-13对成纤维细胞IL-13受体和IL-4受体表达的影响

目的研究IL-13对人肺成纤维细胞株HFL-1和人肝星状细胞株LX-2 IL-13受体和IL-4受体表达的调节作用。方法 RT-PCR法检测HFL-1细胞株和LX-2细胞株IL-13Rα1、IL-4R和IL-13Rα2 mRNA的表达;凝胶电泳定量软件Image Tool2.0对RT-PCR电泳条带进行光密度分析;ELISA法检测HFL-1细胞株和LX-2细胞株分泌可溶型IL-13Rα2以及检测细胞裂解液总IL-13Rα1、IL-4R和IL-13Rα2含量。结果 IL-13(5～100 ng/ml)对HFL-1细胞株和LX-2细胞株表达IL-13Rα1和IL-4R无影响;IL-13为5、10、20 ng/ml时能诱导HFL-1细胞株表达IL-13Rα2并呈现剂量依赖,当IL-13为50 ng/ml时,对HFL-1细胞株IL-13Rα2表达的诱导作用明显减弱,IL-13 100 ng/ml组没有检测到HFL-1细胞株IL-13Rα2的表达;LX-2细胞株IL-13Rα2表达缺失且IL-13不能诱导LX-2细胞株表达IL-13Rα2。结论 IL-13不能上调人肺成纤维细胞株HFL-1和人肝星状细胞株LX-2表达功能型受体IL-13Rα1和IL-4R,表明IL-13不能通过上调IL-13Rα1和IL-4R表达量来放大自身作用;一定浓度的IL-13能诱导人肺成纤维细胞株HFL-1表达抑制型受体IL-13Rα2,表明IL-13的自身负调控。     

IL-18BP 阻断由IL-18 诱导大鼠胶原性关节炎对滑膜细胞凋亡表达的影响

目的:探讨IL-18BP 阻断由IL-18 诱导的大鼠胶原性关节炎(Collagen-induced-arthritis,CIA),对滑膜细胞凋亡表达的影响及可能的作用机制。方法:采用弗氏完全佐剂建立大鼠胶原性关节炎模型,实验共分为5 组:正常对照组、CIA 模型组、IL-18-CIA 模型组、甲氨喋呤治疗组、IL-18BP 治疗组,每组10 只大鼠,共50 只。通过免疫组化检测分析各组大鼠左后踝关节的滑膜组织中Fas、FasL 的表达水平。结果:IL-18BP 治疗组与模型组比较,大鼠关节肿胀程度得到抑制,Fas、FasL 的表达水平显著上调,差异具有统计学意义(P<0.01);IL-18BP 治疗组与正常对照组比较,无显著性差异(P>0.05),疗效较好。结论:IL-18BP 可通过调控细胞凋亡基因Fas、FasL 的表达,促进滑膜细胞的凋亡,有助于类风湿关节炎的治疗。     

Interferon-gamma stimulates the secretion of IL-1, but not of IL-6, by glomerular mesangial cells.

IL-1 activity in culture supernatant and cell lysate from rat mesangial cells stimulated with interferon-gamma (IFN-gamma) was measured by a thymocyte proliferation assay. While IFN-gamma alone had no effect on the secretion or the intracellular pool of IL-1, the enhancement by IFN-gamma of IL-1 secretion in response to lipopolysaccharide (LPS) was observed. The stimulatory effect of culture supernatant on thymocyte proliferation was abrogated by preincubation with the anti-IL-1 antibody. At least 4-h incubation with IFN-gamma and LPS was required to detect enhancing effect of IFN-gamma. The addition of as little as 1 U/ml IFN-gamma significantly increased IL-1 secretion in the presence of 10 micrograms/ml LPS. The IL-6 activity in culture supernatants was determined by measurement of thymidine uptake in mouse IL-6-dependent cell line (MH60.BSF2). Mesangial cells secreted IL-6 in culture supernatant without additional stimuli and LPS distinctly increased it as described previously. However, in contrast to IL-1 production, no effect of IFN-gamma on IL-6 secretion was observed in the presence or absence of LPS. Moreover, we determined whether enhanced IL-1 release is associated with Ia expression on mesangial cells. IFN-gamma alone and the combination with LPS induced marked expression of Ia antigen, whereas LPS alone did not. We conclude that IFN-gamma stimulates the production of IL-1, but not IL-6, by mesangial cells and suggest an important role of IFN-gamma in the pathogenesis of glomerulonephritis by regulating the mesangial production of IL-1 and the accessory cell function of mesangial cells.     

穿心莲内酯对人PBMC/PBM表达IL-18相关细胞因子的影响

目的:研究穿心莲内酯对外周血单核细胞表达IL-18相关细胞因子的影响。方法:不同浓度穿心莲内酯处理LPS刺激的PBMC(Peripheral Blood Mononuclear Cells,外周血单个核细胞)和LPS+IFNγ-/IL-4激活的磁珠分选PBM(PeripheralBlood Monocytes,外周血单核细胞),利用real-time RT-PCR法检测IL-18、IL-18BP、IL-18Rα、IL-18Rβ基因转录水平,ELISA法检测PBM上清中的IL-18、IL-18BP和IL-1β、IL-1Rα。结果:穿心莲内酯呈剂量和时间依赖地调节PBMC IL-18和IL-18BP的表达。穿心莲内酯处理使LPS刺激的PBMC IL-18BP转录增加,IL-18BP/IL-18比值升高;使LPS+IFNγ-激活的PBM表达IL-18BP/IL-18比值从9.60倍升高至214倍;IL-4激活的PBM表达IL-1Rα/IL-1β比值从9 200降低至6 520。结论:穿心莲内酯可调节激活的外周血单核细胞IL-18相关基因转录和表达,抑制炎症时IL-18的高表达。     

脂多糖对人近端肾小管上皮细胞IL-18及其受体复合物表达的影响

观察脂多糖(LPS)对体外培养人近端肾小管上皮细胞IL-18及其受体表达的影响,以初步探讨IL-18在肾小管-间质炎症损伤过程中的作用。以不同浓度LPS(0.01、0.1、1、5、10μg/ml)处理人近端肾小管上皮细胞株(HK-2)24 h、36 h及48 h,然后应用RT-PCR及ELISA测定IL-18及其受体α链(IL-18Rα)和β链(IL-18Rβ)mRNA及蛋白的表达水平变化。静息培养的HK-2细胞表达IL-18 m RNA和蛋白、IL-18Rα和IL-18Rβm RNA,LPS促进HK-2细胞IL-18 mRNA和蛋白的表达及IL-18Rα和IL-18RβmRNA的表达,并呈剂量和时间依赖趋势。肾小管上皮细胞可能既是IL-18的产生者,又是IL-18的靶细胞之一,炎症状态下肾小管上皮细胞通过IL-18自分泌方式参与肾小管-间质的炎症损伤过程。     

HMGB1在TNF-α诱导大鼠滑膜细胞株RSC-364增殖中的作用及机制

目的：探讨HMGB1在TNF-α诱导的大鼠滑膜RSC-364细胞增殖中的作用及机制。方法: 将常规培养的RSC-364细胞分为正常对照组和10 μg·L-1TNF-α刺激组，分别于6 h、12 h、24 h收集细胞。RT-PCR检测HMGB1、STAT1和STAT3 mRNA的表达；免疫细胞化学和流式细胞术检测HMGB1、PCNA、 STAT1和STAT3蛋白表达。结果：① TNF-α能显著上调HMGB1 mRNA和蛋白的表达，同时PCNA蛋白表达也增强（P<0.05或P<0.01）。② TNF-α 作用12 h 后，STAT1 mRNA和蛋白的表达明显增强，24 h表达最高（P<0.01）。③ TNFα 作用6 h-24 h对STAT3 mRNA和蛋白的表达无明显影响（P>0.05）。④ HMGB1蛋白表达与PCNA 、STAT1蛋白表达呈正相关；STAT1与PCNA蛋白表达亦呈正相关。结论：TNF-α可能通过诱导RSC-364细胞高度表达HMGB1，促进滑膜细胞增殖；STAT1可能参与了其信号转导及调控过程。     

Chlorogenic acid and luteolin synergistically inhibit the proliferation of interleukin-1β-induced fibroblast-like synoviocytes through regulating the activation of NF-κB and JAK/STAT-signaling pathways

Abstract

Context: Chlorogenic acid (CGA) and luteolin (Lut) are the predominant constituents of Caulis Lonicerae, which is usually used in the treatment for rheumatoid arthritis (RA).

Objective: In this study, we investigated whether CGA and Lut could synergistically inhibit the proliferation of fibroblast-like synoviocytes (FLSs) in RA synovial tissues.

Methods: Rat FLS cells (RSC-364) induced by interleukin (IL)-1β were treated by CGA, Lut or both of them. The apoptosis rates were detected by flow cytometer. Protein expression of key molecules of NF-κB and JAK/STAT signaling pathways were detected by Western blot.

Results and discussion: Treatment with CGA and Lut inhibited the proliferation of RSC-364 cells stimulated by IL-1β significantly and induced cell apoptosis notably. The ratio of apoptosis in RSC-364 cells induced with IL-1β accompanied by both CGA and Lut increased approximately 7-fold compared with those incubated with IL-1β alone. The results of immunoblot analysis revealed that the key molecules involved in the NF-κB and JAK/STAT-signaling pathways, including NF-κB p50, p100, IKKα/β, gp103, JAK1 and STAT3, were decreased significantly in RSC-364 cells treated by IL-1β plus CAG and Lut compared with those incubated with IL-1β alone. Additionally, the amounts of phospho-IKKα/β and phospho-STAT3 were also decreased significantly in cells treated with CGA and Lut. Furthermore, the synergistic effect of CGA and Lut was superior to the effect of one of these two ingredients.

Conclusion: Our finding suggested that the combination of CGA and Lut may be a potential therapeutic treatment for the inflammatory proliferation of synoviocytes in patients with RA.     

人重组IL-17/His蛋白的原核表达、纯化及其生物学活性

目的:研究人IL-17的体外生物学活性。方法:采用RT-PCR的方法克隆得到了hIL-17基因序列。将测序正确的人IL-17基因装入PQE3.0原核表达载体构建重组载体hIL-17/PQE3.0。该重组载体导入宿主菌M15,经异丙基β-D硫代半乳糖苷(IPTG)诱导产生IL-17/His融合蛋白,并经West-ernblot实验确认。结果:原核表达的hIL-17/His重组蛋白经变性、复性后,利用HiTrapTM亲和层析得到纯品蛋白。体外活性实验表明,该融合蛋白具有刺激人宫颈癌细胞株HeLa分泌IL-6和GM-CSF的作用。结论:制备了具有生物学活性的IL-17/His重组蛋白,为进一步研究该分子在自身免疫疾病等方面的作用奠定了基础。     

The Th1 and Th2 cytokines IFN-γ and IL-4 antagonize the inhibition of monocyte IL-1 receptor antagonist by glucocorticoids: involvement of IL-1

Monocytes express IL-1 and IL-1 receptor antagonist (IL-1Ra) in response to lipopolysaccharide (LPS). IL-1 self-induction contributes to the increase in IL-1 following LPS stimulation. LPS-stimulated IL-1 and IL-1Ra production are inhibited by glucocorticoids. In the present work we examined the regulation of IL-1Ra by Th1 cytokine IFN-γ, Th2 cytokine IL-4, glucocorticoids and IL-1 in human monocytes. We demonstrate that IL-1 contributes to LPS-induced IL-1Ra expression as shown by IL-1 blockade in LPS-stimulated monocytes using a specific anti-IL-1β antibody or recombinant IL-1Ra. Glucocorticoids inhibited IL-1β-stimulated IL-1Ra mRNA expression and protein production. Glucocorticoids inhibited both IL-1-mediated and non-mediated LPS stimulation of IL-1Ra expression. Both IFN-γ and IL-4 reversed the inhibitory effect of glucocorticoids on IL-1Ra expression and secretion. The effect of IFN-γ was blocked by pretreatment of monocytes with an anti-IL-1β blocking antibody, whereas the effect of IL-4 could not be blocked, demonstrating that IFN-γ acts through a mechanism dependent on endogenous IL-1 production, whereas IL-4 acts through an IL-1-independent one. Consistent with this finding, IFN-γ (but not IL-4) failed to reverse the inhibitory effect of glucocorticoids when stimulated by IL-1, and only IL-4 combined with IL-1 showed synergism resulting in an increase in IL-1Ra production. The differential regulation and involvement of IL-1 in the expression of IL-1Ra by IFN-γ, IL-4 and glucocorticoids sets the level of monocyte responsiveness during the Th1 or Th2 responses.