川芎嗪通过AMPK/NF-κB和Nrf-2/HO-1途径减轻过敏性气道炎症和氧化应激的实验研究

目的 本研究旨在探讨川芎嗪对过敏性炎症反应和氧化应激的影响,并探讨其机制是否与AMPK/NF-κB和Nrf-2/HO-1信号通路有关.方法 用组织化学染色来观察小鼠肺组织病理学改变;小鼠支气管肺泡灌洗液(bronchoalveolar lavage fluid,BALF)中炎症细胞数量用Diff-quik染色法检测;用...     

罗哌卡因通过 HMGB1 / NF-κB 通路减轻 LPS 诱导的小鼠急性 肺损伤

目的 探讨罗哌卡因 ( ropivacaine, Rop) 对脂多糖 ( lipopolysaccharide, LPS) 诱导的小鼠急性 肺损伤 (acute lung injury, ALI) 的作用及其机制。 方法 气管内滴注 LPS 诱导肺损伤小鼠模型, 并将小鼠 随机分为 6 组: 对照组、 LPS 组、 罗哌卡因 0. 25、 0. 5、 1 μmol / L 组和右美托咪定 (dexmedetomidine, Dex) 100 μg / kg 组。 Hematoxylin-eosin (H&E) 染色评估肺组织的组织病理学变化; ELISA 法测定肺组织中髓过 氧化物酶 (myeloperoxidase, MPO)、 丙二醛 ( malondialdehyde, MDA)、 超氧化物歧化酶 ( superoxide dismutase, SOD) 和谷胱甘肽过氧化物酶 ( glutathione peroxidase, GSH-Px) 的活性; 检测血清中 IL-6、 IL-1β 和肿瘤坏死因子-α (tumor necrosis factor-α, TNF-α) 的表达; Western 印迹检测 HMGB1 / NF-κB 通路相关蛋 白的表达。 结果 与对照组比较, LPS 诱导肺泡外膜增厚、 出血和肺水肿; 肺损伤评分和肺含水量增加; MPO 和 MDA 活性增加, SOD 和 GSH-Px 水平降低; IL-6、 IL-1β 和 TNF-α 水平升高; HMGB1 蛋白和 NF-κB P65 磷酸化水平升高, 有显著性差异 (P< 0. 05)。 与 LPS 组比较, 罗哌卡因 0. 5、 1 μmol / L 组小鼠肺损伤 程度明显减轻; MPO 和 MDA 活性降低, SOD 和 GSH-Px 水平升高; IL-6、 IL-1β 和 TNF-α 水平降低; HMGB1 蛋白和 NF-κB P65 磷酸化水平降低, 有显著性差异 (P< 0. 05)。 结论 罗哌卡因通过抑制 HMGB1 / NF-κB 通路, 有效减弱了 LPS 引起的肺组织损伤。     

HMGB1、TLR4和NF-B在子痫前期患者胎盘组织及血浆中升高

目的探讨高迁移率族蛋白(HMGB1)、TOLL受体4(TLR4)和NF-B信号通路在子痫前期中的相关作用。方法轻度子痫前期患者10例、重度子痫前期患者20例和同期正常妊娠者30例。免疫组织化学(SP法)检测胎盘中HMGB1、TLR4和NF-κB P65蛋白的表达变化及在组织中的定性、定位;用ELISA法检测血清中HMGB1、TLR4和NF-κB P65蛋白浓度。结果子痫前期患者胎盘中HMGB1、TLR4、和NF-κB P65蛋白表达高于正常对照组(P0.05);轻度和重度子痫前期患者间无差异。子痫前期患者血清中HMGB1、TLR4和NF-κB P65的含量较正常组明显升高(P0.05);且重度子痫前期患者血清中HMGB1、TLR4、和NF-κB P65蛋白表达高于轻度子痫前期患者(P0.05)。结论 HMGB1、TLR4及NF-κB P65蛋白表达水平在子痫前期患者胎盘及血清中显著升高,可能参与了子痫的发病过程。     

Protective effect of Xuebijing injection on paraquat-induced pulmonary injury via down-regulating the expression of p38 MAPK in rats

Background

Exposure to paraquat results in acute lung injury. A systemic inflammatory response has been widely established as a contributor to paraquat-induced acute lung injury. Recent studies have reported that consumption of Xuebijing prevents inflammatory response-induced diseases. This study investigated whether consumption of Xuebijing protected rats against paraquat-induced acute lung injury.

Methods

Adult male Sprague Dawley rats were randomly divided into four groups: control group; paraquat group; paraquat?+?Xuebijing group; and paraquat?+?dexamethasone group. Rats in the paraquat, paraquat?+?Xuebijing and paraquat?+?dexamethasone groups were intraperitoneally injected with paraquat (30 mg/kg) or administered paraquat and Xuebijing at 8 mL/kg or dexamethasone at 5 mg/kg, respectively, via an injection into the tail vein. Lung p38 MAPK, NF-κB65, IkB, p-IκB-α, HIF-1α, Nrf2 and TGF-β1 expression were essayed using western blotting. IL-6, TNF-α, IL-1β, IL-10, TGF-β1 and PIIIP were measured using ELISA. ROS, oxidised glutathione and glutathione activity were measured.

Results

After inducing acute lung injury with paraquat for 24 h, Xuebijing was observed to block lung p-p38 MAPK, NF-κB65, HIF-1α, p-IκB-α and TGF-β1 expression, and increased Nrf2 and IkB expression. The numbers of neutrophils and lymphocytes and total number of cells were significantly lower in the Xuebijing group compared with the control group. IL-6, TNF-α, IL-1β, TGF-β1 and PIIIP levels were significantly decreased in the Xuebijing group. ROS and oxidised glutathione activity were markedly inhibited by Xuebijing. Histological evaluation showed attenuation of the effects of Xuebijing on paraquat-induced lung injury. Compared with the paraquat?+?dexamethasone group, the Xuebijing?+?paraquat group showed no significant differences.

Conclusions

Inhibiting the expression of p38 MAPK and NF-κB65 was crucial for the protective effects of Xuebijing on paraquat-induced acute lung injury. The findings suggest that Xuebijing could effectively ameliorate paraquat-induced acute lung injury in rats. Xuebijing was as effective as dexamethasone at improving paraquat-induced lung injury by regulating lung inflammation, lung function and oxidative stress responses.

     

IL-32γ对类风湿关节炎成纤维样滑膜细胞增殖与细胞周期的影响

目的:研究IL-32γ对类风湿关节炎(RA)成纤维样滑膜细胞(FLS)增殖与细胞周期的影响及机制。方法:体外培养活动性类风湿关节炎和骨关节炎(OA)患者成纤维样滑膜细胞并以IL-32γ处理,应用MTT法检测细胞增殖;流式细胞术检测细胞周期;Western印迹方法检测cyclinD1及NF-κBp65蛋白含量;免疫细胞化学染色法检测PCNA表达的变化。结果:IL-32γ对OA-FLS增殖没有影响;不同浓度的IL-32γ(10～100 ng/ml)在72～120小时范围内,浓度和时间依赖性促进RA-FLS增殖;100 ng/ml的IL-32γ作用RA-FLS 48小时后促进了细胞周期由G1期向S期,进而G2/M期转化,同时上调了cyclin D1、NF-κBp65和PCNA的蛋白表达水平。结论:IL-32γ可促进RA-FLS增殖和加速细胞周期转化。上调NF-κBp65和cyclin D1的表达可能是其作用机制之一。     

Glycogen synthase kinase-3 beta inhibitor suppresses Porphyromonas gingivalis lipopolysaccharide-induced CD40 expression by inhibiting nuclear factor-kappa B activation in mouse osteoblasts

Bone-forming osteoblasts have been recently reported capable of expressing the critical co-stimulatory molecule CD40 upon exposure to bacterial infection, which supports the unappreciated role of osteoblasts in modulating bone inflammation. Recent studies highlight the anti-inflammatory potential of glycogen synthase kinase-3β (GSK-3β) inhibitors; however, their effect on osteoblasts remains largely unclear. In the present study, we showed that treatment with SB216763, a highly specific GSK-3β inhibitor, resulted in a dose-dependent decrease in the mRNA and protein expression of CD40, as well as production of pro-inflammatory cytokines IL-6, TNF-α and IL-1β, in the Porphyromonas gingivalis-lipopolysaccharide (LPS)-stimulated murine osteoblastic-like MC3T3-E1 cells. Furthermore, inhibition of GSK-3β remarkably represses the LPS-induced activation of the nuclear factor kappa B (NF-κB) signaling pathway by suppressing IκBα phosphorylation, NF-κBp65 nuclear translocation, and NF-κBp65 DNA binding activity. Closer investigation by immunoprecipitation assay revealed that β-catenin can physically interact with NF-κBp65. The negative regulation effect of GSK-3β inhibitor on CD40 expression is mediated through β-catenin, for siRNA of β-catenin attenuated the GSK-3β inhibitor-induced repression of NF-κB activation and, consequently, the expression of CD40 and production of pro-inflammatory cytokines in LPS-stimulated MC3T3-E1 cells. Thus our results elucidate the molecular mechanisms whereby GSK-3β inhibitor prevents the LPS-induced CD40 expression on osteoblasts and provide supportive evidence of the potential role of GSK-3β inhibitors in suppressing the immune function of osteoblasts in inflammatory bone diseases.     

生殖支原体脂质相关膜蛋白经Toll样受体2激活NF-κB

目的 探讨生殖支原体(Mg)脂质相关膜蛋白(LAMPs)能否经Toll样受体2(TLR2)激活核转录因子κB(NF-κB).方法 提取MgLAMPs刺激THP-1细胞,ELISA检测NF-κBp65活化水平,RT-PCR检测THP-1细胞TLR2 mRNA的表达,随后ELISA检测TLR2中和抗体对LAMPs激活NF-κBp65的影响,最后用LAMPs刺激瞬时共转染pFLAG-TLR2、pNF-κB-luc、pRL-TK的293T细胞,双荧光素酶报告基因分析TLR2在LAMPs激活NF-κB中的作用.结果 LAMPs能诱导THP-1细胞激活NF-κBp65,并且与LAMPs浓度呈明显的剂量依赖性,当LAMPs为4.0μg/ml时NF-κBp65活化程度最高;LAMPs能上调THP-1细胞TLR2 mRNA的表达;TLR2中和抗体能使LAMPs激活NF-κBp65的活化程度降低60%;共转染pFLAG-TLR2浓度的增加,NF-κB的活化程度明显增加,并且与TLR2的转染量呈剂量依赖性.结论 Mg LAMPs能经TLR2激活NF-κB,TLR2介导的激活在LAMPs发挥致病性过程起着重要作用.     

Glycyrrhizic acid promotes sciatic nerves recovery in type 1 diabetic rats and protects Schwann cells from high glucose-induced cytotoxicity

The present study aims to investigate the therapeutic effect and mechanism of glycyrrhizic acid (GA) in diabetic peripheral neuropathy (DPN). GA significantly mitigated nerve conduction velocity (NCV) deficit and morphological abnormality and reduced high-mobility group box-1 (HMGB1) expression in the sciatic nerves of diabetic rats independent of blood glucose and body weight. Notably, GA alleviated the increase of HMGB1 and the decrease of cell viability in high glucose-stimulated RSC96 cells. Furthermore, GA obviously reduced the concentration of inflammatory cytokines in the sciatic nerves of diabetic rats and supernatants of high glucose-exposed RSC96 cells, then restored the decreased expression levels of nerve growth factor (NGF) and neuritin-1, and the increased expression levels of cleaved caspase-3 and neuron-specific enolase. Additionally, GA markedly inhibited receptor for advanced glycation end products (RAGE) expression, p38MAPK phosphorylation, and the nuclear translocation of NF-κBp65 in diabetic rats and high glucose-exposed RSC96 cells. The promotional effect of high glucose in RSC96 cells was diminished following Hmgb1 siRNA treatment. Our findings indicate that GA may exert neuroprotection on DPN by suppressing HMGB1, which lead to extenuation of inflammation response, balance of NGF, neuritin-1 and caspase-3, as well as inactivation of RAGE/p38MAPK/NF-κBp65 signaling pathway.     

八肽胆囊收缩素对脂多糖诱导小鼠分泌IL-12的影响及其机制研究

目的：观察八肽胆囊收缩素（CCK-8）对脂多糖诱导小鼠分泌IL-12的影响，探讨核因子-κB（NF-κB）和p38丝裂原活化蛋白激酶（p38 MAPK）的信号转导作用。方法：雌性BALB/c小鼠经LPS诱导后分别给予CCK及CCK-A、B受体拮抗剂。ELISA法检测小鼠血清及肺、脾组织中IL-12p40、p70的表达；Western blotting法检测肺脏、脾脏IκB、p38 MAPK的表达；EMSA法检测肺、脾组织中NF-κB/DNA的结合活性。结果：CCK-8进一步提高了LPS诱导的小鼠血清及肺、脾组织中IL-12p40、p70的表达；抑制IκB磷酸化和NF-κB/DNA结合活性；促进p38 MAPK磷酸化。而CCK-A受体拮抗剂（CR-1409）及CCK-B受体拮抗剂（CR-2945）部分逆转了CCK-8的效应。结论：CCK-8可促进LPS诱导小鼠分泌IL-12，p38 MAPK可能参与了其信号转导机制，而NF-κB途径可能并未参与CCK-8促IL-12分泌这一过程。     

NF-κB信号途径在小鼠狼疮性肾炎发病中的可能作用

目的:探讨NF-κB信号途径在小鼠狼疮性肾炎发病中的可能作用。方法:选取16周龄的雄性BXSB小鼠(狼疮性肾炎模型组)和同周龄C57BL/6小鼠(正常对照组)作为研究对象,透射电镜和PAS染色观察肾组织的超微结构形态改变;RT-PCR技术检测小鼠全血中HMGB1mRNA的表达变化。采用ELISA方法检测血清中HMGB1蛋白浓度;免疫组织化学检测肾组织中HMGB1和PCNA蛋白的表达变化;Western blot和流式细胞术检测肾组织中RAGE、p-NF-κB和IκB蛋白的表达。结果:16周时,与正常的C57BL/6小鼠相比,BXSB小鼠血清中BUN水平及尿中微球白蛋白水平明显升高;与正常的C57BL/6小鼠相比,BXSB小鼠全血中HMGB1mRNA水平和血清中HMGB1蛋白浓度明显升高;16周时,与正常的C57BL/6小鼠相比,BXSB基底膜明显增厚,部分足突融合,内皮细胞下可见团块状电子致密物沉积;与正常的C57BL/6小鼠相比,BXSB小鼠肾组织的肾小球中可见较多的PCNA阳性表达,肾小管上皮细胞核内也可见少量的表达;BXSB小鼠肾组织中HMGB1蛋白表达升高,HMGB1蛋白尤其在细胞增生明显而肥大的肾小球呈高表达,主要位于细胞浆和细胞外;而在C57BL/6小鼠肾脏组织中以小管细胞核表达为主;与对照组相比,BXSB小鼠肾组织p-NF-κB和RAGE蛋白表达明显升高;而IκB蛋白表达明显降低;HMGB1蛋白与p-NF-κB蛋白表达呈显著正相关(r=0.833,P=0.000);p-NF-κB蛋白与RAGE蛋白表达呈显著正相关(r=0.621,P=0.018);HMGB1蛋白与RAGE蛋白表达呈显著正相关(r=0.848,P=0.000);p-NF-κB蛋白与IκB蛋白表达呈显著负相关(r=-0.759,P=0.002)。结论:HMGB1在小鼠狼疮性肾炎中的致炎作用可能部分通过结合其受体RAGE,激活NF-κB信号途径,促进肾小球固有细胞的增生,从而导致增生性肾小球肾炎形成而实现的。     

草木犀流浸液片对脓毒症大鼠肺组织VEGF及肺血管通透性的影响

探讨草木犀流浸液片对盲肠结扎穿孔术(CLP)脓毒症大鼠肺VEGF及肺血管通透性的影响。将80只雄性SD大鼠随机分为四组:①正常对照组20只;②假手术组20只;③对照组20只;④治疗组20只。假手术组只开腹,不行CLP;对照组和治疗组建立CLP脓毒症模型。术前2h治疗组给予草木犀流浸液片20mg/kg,每8h一次,24h处死各组大鼠大鼠,观察肺组织VEGF mRNA、NF-κB mRNA、NF-κB p65及血清VEGF-a、TNF-α、IL-6、IL-1β、IL-8、IFN-γ、IL-10、IL-12的变化;同时测定肺组织通透性(EB)、湿/干重比(W/D)及肺组织病理变化。研究发现:与正常对照组比较,VEGFmRNA、NF-κB p65mRNA、NF-κB p65、VEGF、TNF-α、IL-6、IL-1β、IL-8、IFN-γ、IL-10、IL-12在假手术者无明显变化,差异无统计学意义P>0.05;对照组、治疗组显著升高,差异有非常显著意义P<0.01;与对照组比较,治疗组VEGF mRNA、NF-κB p65mRNA、NF-κB p65、VEGF、TNF-α、IL-6、IL-1β、IL-8显著降低,IFN-γ、IL-10、IL-12显著升高,差异有统计学意义P<0.05。VEGF mRNA与NF-κB mRNA、VEGF与NF-κB p65分别具有正相关性(r=0.852,P<0.05;r=0.794,P<0.05)。病检也发现,治疗组肺病病理损伤较对照组明显减轻。结果提示:草木犀流浸液片能够抑制CLP脓毒症大鼠肺组织NF-κB mRNA、VEGF mRNA的表达,降低血清VEGF、TNF-α、IL-6、IL-1β、IL-8水平,促进IFN-γ、IL-10、IL-12的产生,显著降低脓毒症大鼠肺组织微血管通透性,对脓毒症大鼠肺组织具有保护作用。     

NF-κBp65、VEGF-C及受体VEGFR-3在乳腺癌组织中的表达

目的检测乳腺癌组织内NF-κBp65、VEGF-C及受体VEGFR-3的表达水平,并观察它们与临床病理特征的关系,为乳腺癌的早期诊断、治疗提供依据。方法采用免疫组化染色法检测50例乳腺癌组织及10癌旁组织内NF-κBp65、VEGF-C及受体VEGFR-3的表达,并分析与临床病理因素的关系。结果乳腺癌组织内NF-κBp65蛋白表达的阳性率为76.0%,明显高于癌旁对照组织30.0%,二者相比差异显著(P<0.05);乳腺癌组织内VEGF-C蛋白表达的阳性率为84.0%,明显高于癌旁对照组织20.0%,二者相比差异显著(P<0.05);乳腺癌组织内VEGFR-3蛋白表达的阳性率为88.0%,明显高于癌旁对照组VEGFR-3阳性表达率20.0%,两者相比差异显著(P<0.05);乳腺癌组织内NF-κBp65、VEGF-C及受体VEGFR-3三者的表达存在显著相关性(P<0.05),均与肿瘤淋巴转移密切相关(P<0.05),而与病人年龄、肿瘤大小无关(P>0.05)。结论乳腺癌中NF-κBp65的表达可能上调VEGF-C的表达,进而导致肿瘤周围淋巴管增生、扩张,促进肿瘤细胞向区域淋巴结转移。     

HMGB1在系统性红斑狼疮肾损害中的作用

目的 研究高迁移率族蛋白1(high mobility group protein box 1,HMGB1)在系统性红斑狼疮肾损害中的作用.方法 ELISA检测12例健康对照、16例系统性红斑狼疮(systemic lupus erythematosus,SLE)无肾脏损害和14例合并肾脏损害的系统性红斑狼疮患者(lupus nephritis,LN)血清中HMGB1的表达情况.将体外培养的人系膜细胞分为正常对照组和HMGB1刺激组,于培养6、12、24 h后收集细胞,免疫细胞化学检测增殖细胞核抗原(PCNA)的表达变化;免疫细胞化学和流式细胞术检测Toll样受体2(TLR2)、NF-κB 065蛋白的表达变化.结果 血清中HMGB1蛋白在LN组明显高于SLE组和健康对照组,且血清中HMGB1水平与LN患者的蛋白尿呈显著正相关;人重组HMGB1能够促进系膜细胞增殖;与正常对照组相比,HMGB1刺激组中TLR2、NF-κB p65蛋白表达增强;TLR2蛋白与NF-κB p65蛋白表达呈显著正相关(r=0.658,P=0.000);NF-κB p65蛋白表达与PCNA阳性表达率呈显著正相关(r=0.536,P=0.007).结论 HMGB1是狼疮性肾炎发病中的重要的细胞因子之一,可能部分通过与其受体蛋白TLR2结合激活NF-κB促进系膜细胞增生,从而引起肾脏损害.     

PKB在类胰蛋白酶诱导基因表达中的作用

目的：探讨蛋白激酶B(PKB)在类胰蛋白酶（tryptase）诱导基因表达中的作用。 方法： 采用RT-PCR和Western blotting 方法，检测tryptase对ECV304细胞PKB（Akt）的表达及其活性和对转录因子AP-1、NF-κB p65亚单位、JNK、p38MAPK、趋化因子IL-8表达的影响。 结果： 在ECV304中1 μg/L tryptase可使PKB蛋白质磷酸化水平增加并促进PKB、转录因子NF-κB P65亚单位、AP-1和趋化因子IL-8的表达，但对JNK、p38MAPK表达影响不大。PI3K特异性抑制剂LY294002可抑制PKB的表达增加，同时可抑制NF-κB P65亚单位和IL-8的表达增加；反义PKB质粒瞬时转染ECV304，可抑制PKB、AP1、NF-κB P65亚单位和IL-8的表达增加；PAR2的抗体可抑制PKB的磷酸化，但不能阻断PKB表达。 结论： 在ECV304细胞tryptase经其膜受体PAR2通过PI3K促进PKB的磷酸化而激活之，通过其下游途径促进趋化因子IL-8、转录因子AP-1、NF-κB P65亚单位和PKB本身的表达增加。     

急性进展性脑梗死患者外周血可溶性CD40配体及PBMC胞核NF-κB的表达

目的:研究急性进展性脑梗死(APCI)患者外周血清可溶性CD40配体(sCD40L)水平及外周血单个核细胞(PB-MC)胞核核因子κB(NF-κB)p65表达率的变化。方法:采用前瞻性研究方法选择起病7d以内的99例APCI患者作为APCI组,选择同期急性脑梗死(ACI)患者及门诊查体的脑动脉硬化(CAS)患者各100例分别作为ACI组和CAS组;CAS组于查体时,APCI组及ACI组于入院时、病程第7天、第14天、第30天分别监测患者外周血清sCD40L及PBMC胞核NF-κBp65表达率的变化。结果:ACI组入院时外周血清sCD40L及PBMC胞核NF-κBp65表达率均明显高于CAS组(P<0.05),APCI组于入院时、病程第7天、第14天及第30天外周血清sCD40L及PBMC胞核NF-κBp65表达率均明显高于ACI组(P<0.05)。结论:CD40-CD40L信号通路及PB-MC胞核NF-κB表达的过度上调而介导的炎症、凋亡机制可能是APCI发生与发展的分子生物学机制之一。     

柚皮素下调galectin-3可缓解高糖诱导的小鼠足细胞损伤

目的 研究柚皮素联合下调半乳糖凝集素-3(galectin-3)对高糖诱导的小鼠足细胞损伤的影响.方法 小鼠足细胞给予高糖、柚皮素、galectin-3 siRNA、NF-κB信号激活剂PMA处理,MTT方法检测细胞增殖,流式细胞术检测细胞凋亡,Western印迹检测C-Caspase-3、NF-κBp65蛋白表达,硫...     

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。     

Effect of a Stellate Ganglion Block on Acute Lung Injury in Septic Rats

A stellate ganglion block (SGB) is a clinical sympathetic block which can inhibit the body systemic inflammatory response. However, whether and how SGB can attenuate the sepsis-induced acute lung injury remains unclear. Here, we evaluated the effect of SGB on sepsis-induced acute lung injury in rats. Ninety healthy Sprague Dawley (SD) male rats were divided into three groups: the sham operation group (S group), sepsis group (Sep group), and SGB group. The sepsis model rats were produced by cecum ligation and puncture (CLP), and blood samples were taken from the abdominal aorta of the rats at different time points for evaluating the concentration of TNF-α, IL-6, and IL-10 by enzyme-linked immunosorbent assay (ELISA). The rats were sacrificed, and lungs were collected to measure the wet/dry (W/D) lung tissue weight ratio, score the lung tissue pathological damage by microscopic examination, determine the myeloperoxidase (MPO) activity by spectrophotometry, and measure nuclear factor-kappa B (NF-κB) p65 expression by Western blot. The concentration of serum TNF-α, IL-6, and IL-10, lung tissue W/D ratio, pathological injury score, MPO activity, and expression of NF-κB p65 were higher in the Sep group compared with the S group at T_1–4. Furthermore, the concentration of serum TNF-α and IL-6, lung tissue W/D ratio, pathological damage score, MPO activity, and expression of NF-κB p65 were reduced and the concentration of IL-10 was increased in the SGB group compared with the Sep group at T_1–4. The successful sepsis model rats were induced by CLP, and SGB attenuated the sepsis-induced acute lung injury in rats.     

薯蓣皂苷减轻卵清蛋白诱导的过敏性哮喘小鼠的气道炎症

目的探讨薯蓣皂苷对卵清蛋白(ovalbumin,OVA)诱导的过敏性哮喘小鼠中过敏性支气管炎的影响及机制。方法24只小鼠随机分为对照组、OVA组、OVA+30 mg/kg薯蓣皂苷组和OVA+60 mg/kg薯蓣皂苷组,每组纳入6只小鼠。全自动生化仪检测各组支气管肺泡灌洗液(bronchoalveolar lavage fluid,BALF)中嗜中性粒细胞、嗜酸性粒细胞和单核细胞的数量;ELISA法检测BALF中促炎因子IL-1β、IL-4、IL-5和TNF-α的含量;PAS染色法观察肺组织黏液分泌情况并对黏液分泌程度进行评分;免疫组化法观察肺组织p-NF-κB p65的表达和分布情况;Western blotting法检测肺组织中p-IκB和NF-κB p65的蛋白表达水平。结果薯蓣皂苷可降低过敏性哮喘小鼠BALF中炎性细胞数量,同时降低BALF中促炎因子IL-1β、IL-4、IL-5和TNF-α的水平以及肺部黏液的分泌和NF-κB的活化水平。结论薯蓣皂苷能减轻过敏性哮喘小鼠的气道炎症,且其抗炎作用与抑制NF-κB活化有关。