白细胞介素17C通过IKK/NF-κB通路调控慢性鼻窦炎的作用机制

[目的]探讨白细胞介素17C(IL-17C)通过IKK/NF-κB通路调控慢性鼻窦炎(CRS)的作用机制,旨在为临床治疗CRS提供参考.[方法]选择IL-17C刺激人鼻黏膜原代上皮细胞(HNEPCs),采用CCK-8法检测不同质量浓度的IL-17C对HNEPCs活力的影响;利用ELISA法检测IL-17C诱导的HNEPCs中相关因子的表达水平;采用Western blot法检测IL-17C诱导的HNEPCs中IKK/NF-κB信号通路中相关蛋白的表达情况.[结果]与对照组比较,不同质量浓度的IL-17C对HNEPCs活力无显著影响(P>0.05);IL-17C干预组HNEPCs中IL-4、IL-5、IL-13、IL-17及p-IKK表达水平均明显升高,差异均具有统计学意义(P<0.05);IL-17C干预组HNEPCs中p-IKK、p-IκBα及p-NF-κB表达均明显升高(P<0.05),IKK、IκBα及NF-κB蛋白表达无明显改变(P>0.05).与IL-17C干预组比较,IL-17C+地塞米松组p-IKK、p-IκBα及p-NF-κB蛋白表达均明显降低(P<0.05).[结论]IL-17C可诱导HNEPCs中Th2及Th17相关炎症因子的产生,机制认为可能是调控IKK/NF-κB信号通路.

miR-146a-5p affects inflammation response of trophoblast by inhibiting TRAF6/NF-кB signaling pathway

Objective:To investigate the association of Micro-rna(miR)-146a-5p expression with preeclampsia,and further explore the potential mechanism involved.Methods:Compared with the blank control group,the expressions of miR-146a-5p and TRAF6 were detected in lipopolysaccharide(LPS)-induced JEG-3 cells.Chorionic carcinoma cell JEG-3 in vitro culture are divided into control,miR-146a-5p mimic+lipopolysaccharide(lps),miR-146a-5p mimic and miR-146a-5p inhibitor groups.qRT-PCR analysis were used to detect the mRNA of miR-146a-5p,IL-1β,IL-6,IL-8 and TNF-α.Western blot assays were carried out to determine the protein expression of TRAF6/NF-кB pathway related proteins.Results:1.miR-146a expression in miR-146a mimic group were significantly higher than the other three groups(P<0.05).2.Compared with the control group,the expression level of miR-146a-5p in JEG-3 cells induced by LPS was significantly increased,and the expression level of TRAF6 was significantly reduced(P<0.05).3.Compared with the control group,the mRNA expression levels of IL-1β,IL-6,IL-8,and TNF-αdecreased significantly after using miR-146a mimic(P<0.05).After adding miR-146a inhibitor,the mRNA expression levels of IL-1β,IL-6,IL-8,and TNF-αwere significantly increased(P<0.05).However,compared with the mimic+LPS group,the difference was not statistically significant(all P>0.05).The results of Western Blot showed that the expression of TRAF6 and NF-κB protein in JEG-3 cells decreased significantly after adding miR-146a mimic and increased after adding miR-146a inhibitor.Conclusion:MiR-146-5p can affect the inflammation response of Maternal-fetal interface by inhibiting TRAF6/NF-кB signaling pathway in preeclampsia.

柴胡皂苷A对溃疡性结肠炎大鼠IKK/IKB/NF-κB信号通路及肠上皮细胞凋亡的影响

目的探讨柴胡皂苷(SS)A对溃疡性结肠炎(UC)大鼠核因子(NF)-κB抑制物激酶(IKK)/抑制因子κB(IKB)/NF-κB信号通路及肠上皮细胞凋亡的影响。方法制备UC大鼠模型,造模后随机分为模型组、SSA(低、中、高)剂量组、阳性对照组,每组10只;正常组10只大鼠作为空白对照。常规饲养2 d,第3天时SSA(低、中、高)剂量组分别灌胃(12.5、25.0、50.0)mg/kg SSA,阳性对照组灌胃0.5 g/kg柳氮磺吡啶(SASP),正常组和模型组灌胃等体积生理盐水,1次/d,连续5 d。苏木素-伊红(HE)染色观察肠黏膜组织形态;酶联免疫吸附试验(ELISA)检测血清中白细胞介素(IL)-1β、IL-6、肿瘤坏死因子(TNF)-α水平;TUNEL染色观察肠上皮细胞凋亡情况;Western印迹检测肠黏膜组织中IKKα、IKB、NF-κB p65、天冬氨酸特异性半胱氨酸蛋白酶(caspase)-3、B细胞淋巴瘤-2基因(Bcl-2)、Bcl-2相关X蛋白(Bax)蛋白水平。结果正常组大鼠实验结束后毛色有光泽,大便正常;肠黏膜组织完整,肌层结构正常。模型组大鼠毛色暗淡无光泽,大便出现不同程度的便血现象,便稀且黏;肠黏膜处出现明显炎症现象,细胞排列紊乱,部分结肠腺体被浸润的炎症细胞替代,黏膜层变薄。SSA(低、中、高)剂量组、阳性对照组大鼠毛色较暗淡,大便出现不同程度的缓和;出现不同程度的炎症浸润和肠腺溃疡现象,但较模型组有所降低。与正常组相比,模型组血清中IL-1β、IL-6、TNF-α水平,肠上皮细胞凋亡率,肠黏膜组织中IKKα、IKB、NF-κB p65、caspase-3、Bax蛋白水平显著升高,Bcl-2蛋白水平显著降低(均P<0.05);与模型组相比,SSA(低、中、高)剂量组、阳性对照组血清中IL-1β、IL-6、TNF-α水平,肠上皮细胞凋亡率,肠黏膜组织中IKKα、IKB、NF-κB p65、caspase-3、Bax蛋白水平显著降低,Bcl-2蛋白水平显著升高(均P<0.05);随着SSA给药剂量的增加,SSA各剂量组血清中IL-1β、IL-6、TNF-α水平,肠上皮细胞凋亡率,肠黏膜组织中IKKα、IKB、NF-κB p65、caspase-3、Bax蛋白水平逐渐降低,Bcl-2蛋白水平逐渐升高(均P<0.05),呈剂量依赖性。结论SSA可抑制IKK/IKB/NF-κB信号通路及肠上皮细胞凋亡,实现对UC大鼠的保护。

RNAi抑制IKK/NF-κB信号通路对子宫内膜异位症腺上皮细胞中MMP-9的表达及细胞侵袭性的影响

目的探讨小干扰RNA(siRNA)沉默IκB激酶(IKK)/核因子κB(NF-κB)信号通路对子宫内膜异位症在位内膜腺上皮细胞中基质金属蛋白酶-9(MMP-9)的表达及细胞侵袭性的影响。方法根据基因数据库IKKα的c DNA序列,设计构建合成IKKαsiRNA转染10例EMs患者在位内膜原代腺上皮细胞,设立空白对照组(不加任何siRNA的等比例转染试剂)、阴性对照组(与IKKα同源性极低的无意义链siRNA)及实验组(IKKαsiRNA)。采用Realtime PCR、Western blot、Transwell等方法分别检测IKKαsiRNA转染前后NF-κB、MMP-9 mRNA和蛋白表达及腺上皮细胞侵袭性的变化。结果与空白对照组和阴性对照组比较,实验组EMs腺上皮细胞中NF-кB、MMP-9蛋白及mRNA表达降低,差异有统计学意义(P<0.05);IKKαsiRNA转染后EMs腺上皮细胞的细胞侵袭性明显降低,差异有统计学意义(P<0.05)。结论 RNA干扰可抑制IKK/NF-κB信号通路进而显著降低细胞的侵袭,这种抑制作用可能是通过下调MMP-9的表达进而改变其侵袭作用诱导EMs的发生。

Huoxin Pill Reduces Myocardial Ischemia Reperfusion Injury in Rats via TLR4/NFκB/NLRP3 Signaling Pathway

Objective:To explore the protective effect of Huoxin Pill(HXP)on acute myocardial ischemia-reperfusion(MIRI)injury in rats.Methods:Seventy-five adult SD rats were divided into the sham-operated group,model group,positive drug group(diltiazem hydrochloride,DH),high dose group(24 mg/kg,HXP-H)and low dose group(12 mg/kg,HXP-L)of Huoxin Pill(n=15 for every group)according to the complete randomization method.After 1 week of intragastric administration,the left anterior descending coronary artery of the rat's heart was ligated for 45 min and reperfused for 3 h.Serum was separated and the levels of creatine kinase(CK),creatine kinase isoenzyme(CK-MB)and lactate dehydrogenase(LDH),superoxide dismutase(SOD),and malondialdehyde(MDA),hypersensitive C-reactive protein(hs-CRP)and interleukin-1β(IL-1β)were measured.Myocardial ischemia rate,myocardial infarction rate and myocardial no-reflow rate were determined by staining with Evans blue and 2,3,5-triphenyltetrazolium chloride(TTC).Traditional Chinese Medicine Systems Pharmacology Database and Analysis Platform(TCMSP)and Bioinformatics Analysis Tool for Molecular mechANism of Traditional Chinese Medicine(BATMAN)databases were used to screen for possible active compounds of HXP and their potential therapeutic targets;the results of anti-inflammatory genes associated with MIRI were obtained from GeneC ards,Drugbank,Online Mendelian Inheritance in Man(OMIM),and Therapeutic Target Datebase(TTD)databases was performed;Gene Ontology(GO)and Kyoto Encyclopedia of Genes and Genomes(KEGG)enrichment were used to analyze the intersected targets;molecular docking was performed using AutoD ock Tools.Western blot was used to detect the protein expression of Toll-like receptor 4(TLR4)/nuclear factor kappa-B(NFκB)/NOD-like receptor protein 3(NLRP3).Results:Compared with the model group,all doses of HXP significantly reduced the levels of LDH,CK and CK-MB(P<0.05,P<0.01);HXP significantly increased serum activity of SOD(P<0.05,P<0.01);all doses of HXP significantly reduced the levels of hs-CRP and IL-1β(P<0.05,P<0.01)and the myocardial infarction rate and myocardial no-reflow rate(P<0.01).GO enrichment analysis mainly involved positive regulation of gene expression,extracellular space and identical protein binding,KEGG pathway enrichment mainly involved PI3K-Akt signaling pathway and lipid and atherosclerosis.Molecular docking results showed that kaempferol and luteolin had a better affinity with TLR4,NFκB and NLRP3 molecules.The protein expressions of TLR4,NFκB and NLRP3 were reduced in the HXP group(P<0.01).Conclusions:HXP has a significant protective effect on myocardial ischemia-reperfusion injury in rats,and its effect may be related to the inhibition of redox response and reduction of the inflammatory response by inhibiting the TLR4/NFκB/NLRP3 signaling pathway.

阻断IKK/NF-κ B信号通路对大鼠恐惧记忆消退的影响

目的 采用条件性恐惧记忆模型研究IKK/NF-κ B信号通路在大鼠听觉恐惧记忆消退获得及巩固阶段的影响.方法 成年SD大鼠接受BLA脑区核团埋管手术,术后恢复1周,进行听觉恐惧记忆训练.恐惧记忆建立后,消退训练前20 min,大鼠分别核团微注射IKK/NF-κ B的拮抗剂柳氮磺胺吡啶（SSZ）和生理盐水（Vehicle）,然后进行消退记忆训练,分别在24 h和1周后进行恐惧记忆的行为学测试.结果 听觉恐惧记忆训练后,大鼠的僵住时间百分比明显增高（Vehicle组：pre-CS 21.16％,post-CS71.23％,P＜0.01；SSZ组：pre-CS 22.23％,post-CS 72.14％,P＜0.01）；听觉恐惧记忆消退训练前给予SSZ组和Vehicle组在消退训练结束时大鼠的僵住时间百分比无明显的差异（SSZ 47.52％,Vehicle 46.20％,P＞0.05）,但是在训练结束后24 h的巩固测试中SSZ组大鼠的僵住时间百分比明显地高于Vehicle组（Vehicle41.03％,SSZ 60.51％,P＜0.01）,而且1周后的长时程记忆的测试中SSZ组大鼠的僵住时间百分比也明显的高于Vehicle组（Vehicle 34.17％,SSZ 57.21％,P＜0.01）,表现出明显的对条件性声音刺激的恐惧反应.结论 在听觉恐惧记忆的消退阶段,干扰大鼠BLA处IKK/NF-κ B信号通路的活性,破坏了消退记忆获得后的巩固,但对恐惧记忆消退的获得是没有影响的.结果提示IKK/NF-κ B信号通路可能在听觉恐惧记忆的消退过程中发挥着重要的作用,也为临床寻找消除PTSD药物治疗靶点提供理论依据.

小柴胡汤对CFA大鼠滑膜组织NF-κB信号通路作用的探讨

目的:观察小柴胡汤治疗后弗氏完全佐剂(CFA)大鼠滑膜组织核转录因子(NF)-κB信号通路中肿瘤坏死因子受体相关死亡结构域(TARDD),NF-κB抑制蛋白α(IκBα),IκB激酶-α(IKKα),NF-κB p65蛋白的表达。方法:将SPF级健康成年雌性Wistar大鼠应用弗氏完全佐剂和牛Ⅱ型胶原制备CFA动物模型。根据随机数字表,将大鼠随机分为正常组、模型组、小柴胡汤低、中、高剂量组、雷公藤多苷组。各组于造模后7 d开始灌胃给药,正常组及模型组均予注射用水,小柴胡汤低、中、高剂量组(5. 94,11. 88,23. 76 g·kg-1),雷公藤多苷片(0. 006 3 g·kg-1),分别2 mL/次,每天3次灌胃,连续给药28 d后观察实验大鼠踝关节组织病理学及蛋白免疫印迹法(Western blot)检测NF-κB信号通路中TARDD,IKKα,IκBα,NF-κB p65蛋白表达。结果:与正常组比较,模型组大鼠右后踝关节组织病理评分显著增加(P <0. 01),NF-κB信号通路中TARDD,IKKα,IκBα,NF-κB p65蛋白表达显著增高(P <0. 01)。与模型组比较,随着小柴胡汤剂量的增加,实验大鼠右后踝关节组织病理评分显著减少(P <0. 01),在大鼠踝关节组织标本NF-κB信号通路中TARDD,IKKα,IκBα,NF-κB p65关键蛋白的表达上,小柴胡汤低剂量组蛋白表达明显减低(P <0. 05),而小柴胡汤中剂量组、小柴胡汤高剂量组、雷公藤多苷组蛋白表达显著减低(P <0. 01)。结论:研究显示小柴胡汤随着剂量的增加,可以有效地改善滑膜炎症,抑制NF-κB炎症信号通路中关键蛋白的表达,从而阻止炎症而抑制骨侵蚀。