DATS通过NF-κB抑制LPS诱导小鼠肺泡巨噬细胞促炎细胞因子表达

目的探讨二烯丙基三硫(DATS)抑制脂多糖(LPS)诱导小鼠肺泡巨噬细胞肿瘤坏死因子-α(TNF-α)及白介素-1β表达的信号转导机制。方法体外培养MH-S细胞,用DATS和(或)LPS进行干预。反转录PCR检测细胞中TNF-α、IL-1β mRNA表达,电泳迁移率改变分析(EMSA)检测细胞核因子-κB(NF-κB)活性,Western blot检测细胞磷酸化(p-IκB)及非磷酸化IκB的表达。结果LPS刺激MH-S细胞可导致TNF-α、IL-1β mRNA、p-IκB表达增加及NF-κB活性升高。用DATS(0.1、0.5、2.5、5.0mg.L-1)预处理细胞30min后再给予LPS刺激,可使TNF-α、IL-1β mRNA表达降低,并呈剂量依赖性;升高的NF-κB活性及p-IκB表达均显不同程度的抑制。单独DATS对TNF-α、IL-1β mRNA表达及NF-κB活性无影响。结论DATS可通过抑制IκB磷酸化及NF-κB活化,进而下调LPS诱导小鼠肺泡巨噬细胞TNF-α、IL-1β mRNA表达。     

Effects of intrathecal epigallocatechin gallate, an inhibitor of Toll-like receptor 4, on chronic neuropathic pain in rats

Numerous studies revealed that spinal inflammation and immune response play an important role in neuropathic pain. In this study, we investigated the effects of intrathecal injection of a Toll-like receptor (TLR4) inhibitor epigallocatechin gallate (EGCG) on neuropathic pain induced by chronic constriction injury of the sciatic nerve (CCI). A total of 120 rats were randomly assigned into 4 groups: sham-operated group, CCI group, CCI plus normal saline group and CCI plus EGCG group. CCI and sham surgeries were performed and both thermal hyperalgesia and mechanical allodynia were tested. Lumbar spinal cord was sampled and the mRNA and protein expressions of TLR4 and High Mobility Group 1 protein (HMGB1) were detected, the contents of tumor necrosis factor alpha (TNF-α), interleukin-1 beta (IL-1β) and interleukin-10 (IL-10) were measured by ELISA, and immunohistochemistry for nuclear factor kappa B (NF-κB) was also carried out. When compared with the sham group, both mechanical and heat pain thresholds were significantly decreased, and the mRNA and protein expressions of TLR4 and HMGB1, the contents of TNF-α, IL-1β and IL-10 in the spinal cords and NF-κB expression in the spinal dorsal horn were markedly increased in CCI rats (P<0.05). After intrathecal injection of EGCG (1mg/kg) once daily from 1day before to 3days after CCI surgery, the expressions of TLR4, NF-κB, HMGB1, TNF-α and IL-1β were markedly decreased while the content of IL-10 in the spinal cord increased significantly accompanied by dramatical improvement of pain behaviors in CCI rats (P<0.05). These results show that the TLR4 signaling pathway plays an important role in the occurrence and development of neuropathic pain, and the therapy targeting TLR4 might be a novel strategy in the treatment of neuropathic pain.     

丹参酮ⅡA对EA.hy926细胞TLR4/NF-κB炎症信号通路的影响

目的观察丹参酮ⅡA对脂多糖(LPS)诱导人脐静脉细胞融合细胞EA.hy926 TLR4/NF-κB炎症信号通路的影响,探讨丹参酮ⅡA抗动脉粥样硬化(AS)的作用机制。方法体外培养人脐静脉细胞融合细胞EA.hy926;观察丹参酮ⅡA低、中、高剂量组对LPS刺激EA.hy926细胞的保护作用,RT-PCR和Western bolt法检测TLR4、NF-κB、TNF-αmRNA和蛋白表达。结果 LPS刺激组TLR4、NF-κB和TNF-αmRNA和蛋白表达较正常组明显增加(P<0.05)。与LPS刺激组相比,丹参酮ⅡA低剂量组TLR4、NF-κB、TNF-αmRNA及蛋白表达无明显差异,而丹参酮ⅡA中、高剂量组TLR4、NF-κB和TNF-αmRNA及蛋白质表达明显降低(P<0.05)。结论丹参酮ⅡA抗AS的作用机制之一是通过干预TLR4/NF-κB信号通路来实现的。     

实验性关节炎大鼠滑膜组织核因子-κB基质金属蛋白酶-9表达相关性分析

目的观察核因子κB(NF-κB)、基质金属蛋白酶(MMP)-9在实验性关节炎(CIA)和对照组大鼠滑膜组织中不同时间点的表达差异及其血浆中肿瘤坏死因子(TNF)-α、白细胞介素(IL)-1β的含量变化,探讨这些细胞因子在CIA发病中的作用机制,为类风湿关节炎(RA)今后的治疗提供理论依椐。方法将42只雄性Wistar大鼠随机分为模型组和对照组,通过免疫组织化学的方法检测各组大鼠不同时期滑膜组织NF-κB、MMP-9的表达水平,用放射免疫法(RIA)测定TNF-α、IL-1β的血浆含量,同时观察其发病时间与关节炎指数(AI)积分、病理评分及上述细胞因子之间的关系。结果随着CIA大鼠发病时间延长,AI和病理评分逐渐增加,NF-κB、MMP-9表达水平和TNF-α、IL-1β血浆含量也随之增加。CIA大鼠这些细胞因子的测定值都显著高于对照组(P<0.01),AI、病理评分与NF-κB、MMP-9呈正相关关系(P<0.05);CIA大鼠滑膜组织NF-κB、MMP-9表达水平之间呈正相关(P<0.05),而且它们的表达水平与IL-1β、TNF-α血浆含量之间亦呈正相关(P<0.05)。结论通过与TNF-α和IL-1β相互作用,滑膜组织中NF-κB、MMP-9的表达之间可能互相影响、互相促进,形成正反馈式的损坏机制,在CIA大鼠病情进展中起着重要作用,可能是RA发生发展以及骨质侵蚀的关键因子。     

党参多糖不同组分的抗炎活性及机制研究

目的:筛选出党参多糖中具有较好抗炎效果的组分,并探索其抗炎机制。方法:以党参药材为样品,采用水提醇沉法得党参粗多糖(CP)。将CP通过DEAE Sepharose Fast Flow、SephadexG-150等凝胶柱分离纯化后得到组分CP1-2-1、CP3-1-1,并对其进行表征。采用MTT法测定0.01、0.1、1、10、100μg/mL的CP、CP1-2-1、CP3-1-1分别对小鼠腹腔巨噬细胞RAW264.7作用24、48 h后的细胞存活率。然后将细胞分为空白组(空白培养基)、模型组[1μg/mL脂多糖(LPS)]和3种多糖的低、中、高质量浓度组(1μg/mL LPS+25、50、100μg/mL CP、CP1-2-1、CP3-1-1),加药培养24 h。分别测定细胞培养液中一氧化氮(NO)含量以及细胞中Toll样受体4(TLR4)、白细胞介素6(IL-6)、核因子-κB(NF-κB)、肿瘤坏死因子α(TNF-α)mRNA表达水平。结果:CP的糖含量高达(92.20±0.73)%;CP1-2-1是由果糖组成的单一中性多糖,相对分子量为25.8 kDa;CP3-1-1是由阿拉伯糖...     

柴芩承气汤通过抑制TLR4/NF-κB p65通路减轻小鼠重症急性胰腺炎并发肝损伤

目的基于TLR4/NF-κB p65信号通路探讨柴芩承气汤(chaiqinchengqi decoction,CQCQD)对小鼠重症急性胰腺炎(severe acute pancreatitis,SAP)并发肝损伤的保护机制。方法昆明小鼠36只,随机分为3组(n=12),即对照组(Control),重症急性胰腺炎模型组(SAP)和柴芩承气汤治疗组(SAP+CQCQD)。腹腔注射20%L-精氨酸(3.3 g·kg-1,2次,间隔1 h)建立SAP模型,治疗组给予柴芩承气汤灌胃(19 g·kg-1·d-1)。造模后72 h观察胰腺、肝脏组织病理变化,检测血清内毒素含量,肝组织TLR4、p-NF-κB p65蛋白表达,及肝内炎性因子水平。结果与Control组相比,SAP组胰腺和肝脏可见明显的病理损伤,血清内毒素含量增多,肝组织TLR4、p-NF-κB p65表达增加,IL-6、TNF-α、MIP-1αmRNA水平升高。与SAP组相比,柴芩承气汤组胰腺和肝脏组织病理损伤减轻,血清内毒素含量降低,肝组织TLR4、p-NF-κB p65表达和IL-6、TNF-α、MIP-1α mRNA水平减少。 结论 柴芩承气汤可能通过抑制肝组织TLR4/NF-κB p65通路活化,降低促炎因子水平,从而减轻小鼠SAP并发肝损伤。     

基于TLR4/MyD88/NF-κB信号通路研究黄连素对小鼠巨噬细胞极化的干预作用

目的:基于Toll样受体4(TLR4)/髓样分化因子88(MyD88)/核因子κB(NF-κB)信号通路研究黄连素对小鼠巨噬细胞极化的影响。方法:以小鼠巨噬细胞RAW264.7为对象,以阿托伐他汀钙为阳性对照,经脂多糖(LPS)诱导以复制炎症细胞模型,采用酶联免疫吸附测定法检测低、中、高剂量黄连素(5、10、20μmol/L)作用24 h后细胞培养液中肿瘤坏死因子α(TNF-α)、白细胞介素6(IL-6)、NF-κB含量,采用实时荧光定量聚合酶链反应法检测细胞中TLR4、MyD88 mRNA的表达水平,采用Western blotting法检测细胞中TLR4、MyD88、诱导型一氧化氮合酶(iNOS)、CD206蛋白的表达水平。结果:与空白对照组比较,LPS诱导组细胞培养液中TNF-α、IL-6、NF-κB含量,细胞中TLR4、MyD88 mRNA的相对表达量以及TLR4、MyD88、iNOS蛋白相对表达量均显著升高(P<0.05)。与LPS诱导组比较,阿托伐他汀钙组和黄连素中、高剂量组TNF-α、IL-6含量,TRL4、MyD88 mRNA及其蛋白的相对表达量以及各给药组NF-...     

幽门螺杆菌感染胃黏膜中IL-1B基因多态性对TNF-α和NF-κB的上调作用

摘要目的观察白细胞介素（IL） 1B基因多态性对胃黏膜感染幽门螺杆菌（Hp）后肿瘤坏死因子（TNF） α、核因子（NF） κB的表达和活性的影响。方法Hp阳性胃十二指肠溃疡患者94例,通过多态性分析和检测,其中IL 1B 31T/T基因型21例,C/C基因型40例,C/T基因型33例。以34例Hp阴性功能性胃肠病患者作为对照,其中IL 1B 31T/T基因型7例,C/C基因型18例,C/T基因型9例。结果Hp阴性患者胃黏膜组织TNF α和NF κB表达量极少,而且IL 1B 31各基因型间差异无统计学意义。在Hp阳性胃黏膜,IL 1B 31T/T基因型、C/T基因型和C/C基因型患者TNF α表达分别为1.20±0.17,0.87±0.18和0.94±0.16;NF κB mRNA表达分别为1.10±0.16,0.90±0.15和0.97±0.17（均P＜0.01）。而Hp阴性的NF κB mRNA活性很低。在Hp阳性患者,NF κB 活性显著增加,而且IL 1B 31T/T基因型患者比C/T和C/C基因型明显增加,分别为0.99±0.12,0.89±0.15和0.90±0.14（P＜0.01）。结论Hp感染促进TNF α和NF κB mRNA表达,上调NF κB活性,在IL 1B 31T/T基因型个体更明显。提示Hp感染后,IL 1B 31基因型患者的高胃癌风险有炎症反应参与。     

The effect of magnolol on the Toll-like receptor 4/nuclear factor kappa B signaling pathway in lipopolysaccharide-induced acute lung injury in mice

Magnolol, a hydroxylated biphenyl compound isolated from Magnolia officinalis has been reported to have anti-inflammatory properties. The purpose of this study was to evaluate the effect of magnolol on acute lung injury induced by lipopolysaccharide in mice. Male BALB/c mice were pretreated with dexamethasone or magnolol 1 h before intranasal instillation of lipopolysaccharide (LPS). 7 h after LPS administration, the myeloperoxidase in lung tissues, lung wet/dry weight ratio and inflammatory cells in the bronchoalveolar lavage fluid were determined. The levels of tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6) and interleukin-1β (IL-1β) in the bronchoalveolar lavage fluid were measured by enzyme-linked immunosorbent assay (ELISA). The extent of phosphorylation of nuclear factor of inhibitory kappa B alpha (IκB-α), nuclear factor kappa-B (NF-κB) p65 and the expression of Toll-like receptor-4 (TLR4) were detected by western blot. The results showed that magnolol markedly attenuated the histological alterations in the lung; reduced the number of total cells, neutrophils, and macrophages in the bronchoalveolar lavage fluid; decreased the wet/dry weight ratio of lungs in the bronchoalveolar lavage fluid; down-regulated the level of pro-inflammatory mediators, including TNF-α, IL-1β and IL-6; inhibited the phosphorylation of IκB-α, NF-κB p65 and the expression of TLR4, caused by LPS. Taken together, our results suggest that anti-inflammatory effects of magnolol against the LPS-induced acute lung injury may be due to its ability of inhibition TLR4 mediated NF-κB signaling pathways. Magnolol may be a promising potential therapeutic reagent for acute lung injury treatment.     

Modulation of Inflammatory Cytokines and Mitogen-activated Protein Kinases by Acetate in Primary Astrocytes

Acetate supplementation attenuates neuroglia activation in a rat model of neuroinflammation by a mechanism associated with an increase in brain acetyl-CoA, an alteration in histone acetylation, and reduction of interleukin (IL)-1β expression. We propose that reduced astroglial activation occurs by disrupting astrocyte-derived inflammatory signaling and cytokine release. Using primary astroglial cultures, we found that LPS (0–25 ng/ml, 4 h) increased tumor necrosis factor (TNF-α) and IL-1β in a concentration-dependent manner, which was reduced by treatment with sodium acetate (12 mM). LPS did not alter H3K9 acetylation or IL-6 levels, whereas acetate treatment increased H3K9 acetylation by 2-fold and decreased basal levels of IL-6 by 2-fold. Acetate treatment attenuated the LPS-induced increase in TNF-α mRNA, but did not reverse the mRNA levels of other pro-inflammatory cytokines. By contrast, LPS decreased TGF-β1 and IL-4 protein and TGF-β1 mRNA, all of which was reversed with acetate treatment. Further, we found that acetate treatment completely reversed LPS-induced phosphorylation of MAPK p38 and decreased basal levels of phosphorylated extracellular signal-regulated kinases1/2 (ERK1/2) by 2-fold. Acetate treatment also reversed LPS-elevated NF-κB p65, CCAAT/enhancer-binding protein beta protein levels, and reduced basal levels of phosphorylated NF-κB p65 at serine 536. These results suggest that acetate treatment has a net anti-inflammatory effect in LPS-stimulated astrocytes that is largely associated with a disruption in MAPK and NF-κB signaling.     

Lactobacillus helveticus HY7801 ameliorates vulvovaginal candidiasis in mice by inhibiting fungal growth and NF-κB activation

The anti-inflammatory effects of hydrogen peroxide-producing lactic acid bacteria (LAB) against Candida albicans-induced vulvovaginal candidiasis in β-estradiol-immunosuppressed mice were examined. Oral and intravaginal treatment with these LABs significantly decreased the level of viable C. albicans within the vaginal cavity as well as the quantitated myeloperoxidase activity in the vaginal tissues when compared with control untreated mice. Out of all of the LABs tested, Lactobacillus helveticus HY7801 (LH) most potently inhibited vulvovaginal candidiasis. LH also inhibited the expression of the pro-inflammatory cytokines including TNF-α, IL-1β and IL-6, and inflammatory enzymes, COX-2 and iNOS, as well as the activation of NF-κB. However, the addition of LH led to an increase in IL-10 cytokine expression in the vaginal tissues. In addition, the decrease of Lactobacillaceae and the increase of Pasteurellaceae caused by treatment with C. albicans were reversed with oral and intravaginal administration of LH, suggesting a potential shift in the vaginal microflora present. Addition of LH was toxic to C. albicans in vitro when cultured with HeLa cells. Oral administration of LH inhibited lipopolysaccharide (LPS)-induced TNF-α and IL-1β expressions in β-estradiol-immunosuppressed mice but reversed the expression of anti-inflammatory cytokine IL-10 in comparison to levels observed in the normal control group. LH also inhibited the expression of the pro-inflammatory cytokines, TNF-α and IL-1β, and the activation of NF-κB in LPS-stimulated peritoneal macrophages. Based on these findings, LH may ameliorate vulvovaginal candidiasis by suppressing the NF-κB pathway, as well as through inhibition of the growth of C. albicans.     

Grape-seed proanthocyanidins inhibit the lipopolysaccharide-induced inflammatory mediator expression in RAW264.7 macrophages by suppressing MAPK and NF-κb signal pathways

Grape-seed proanthocyanidins (GSPs) have been shown to function as an anti-oxidant and anti-inflammatory agent with little toxicity in vivo and in vitro. However, little is known about their anti-inflammatory properties and mechanisms of action. The specific focus being its effects on the MAP kinases and nuclear factor-kappaB (NF-κB) signal transduction pathways in lipopolysaccharide (LPS) -stimulated RAW264.7 cells. GSPs extract has been found to suppress the mRNA expression of pro-inflammatory cytokines like tumor necrosis factor-α (TNF-α), interleukin-1β (IL-1β) and inflammatory molecule of cyclooxygenase-2 (COX-2) while mRNA level of IL-10 was greatly promoted. Furthermore, GSPs extract inhibited the expression of phosphorylated ERK, JNK and P38, as well as phosphorylated IKKα/β and NF-κB p65 subunit. In conclusion, our results show that GSPs extract showed its anti-inflammatory and immunomodulatory properties by suppressing the activation of MAP kinases and NF-κB signal transduction pathways.     

基于TLR4/NF-κB/NLRP3信号通路研究三叶香茶菜含药血清对枯否细胞活化的影响

目的 研究三叶香茶菜含药血清(isodon ternifolius-containing serum,ITS)通过Toll样受体4(TLR4)/核因子κB(NF-κB)/NOD样受体蛋白3(NLRP3)信号通路对脂多糖(lipopolysaccharide,LPS)诱导的大鼠原代肝枯否细胞(Kupffer cell,KC)活化的影响。方法 分离培养大鼠原代KC,将LPS诱导的大鼠原代KC分为空白对照组、模型对照组、空白血清组、阳性对照组(秋水仙碱含药血清组)、ITS组、TLR4阻断剂组、TLR4阻断剂+ITS组。MTT法检测不同浓度ITS对KC增殖活性的影响;ELISA法检测KC细胞上清液白介素-1β(IL-1β)、白细胞介素-18(IL-18)、肿瘤坏死因子-α(TNF-α)、白细胞介素-6(IL-6)含量;荧光定量聚合应(PCR)、Western blotting和免疫荧光检测KC中TLR4/NF-κB/NLRP3信号通路中TLR4、核因子κB抑制蛋白α(IκBα)、半胱肽氨酸蛋白酶-1(Caspase-1)、NLRP3 mRNA和TLR4、IκBα、磷酸化IκBα(p-IκBα)、Caspase-1、NLRP3、NF-κBp65蛋白表达情况。结果 与模型对照组相比,各药物组KC上清液中IL-1β、IL-18、TNF-α和IL-6含量,以及细胞中TLR4、IκBα、Caspase-1、NLRP3 mRNA和TLR4、IκBα、p-IκBα、Caspase-1、NLRP3、NF-κBp65蛋白的表达均下调或降低(P<0.05或P<0.01);与TLR4阻断剂组比较,TLR4阻断剂+ITS组上述多数指标的改善更加明显。结论 三叶香茶菜可能通过下调TLR4/NF-κB/NLRP3信号通路抑制KC活化,减少炎性因子的表达和释放,从而减轻肝脏炎症损伤。     

己酮可可碱联合骨髓间充质干细胞对高糖诱导的肾小球系膜细胞炎症因子及NF-κB信号通路的影响

目的 探讨己酮可可碱（pentoxifylline,PTX）联合骨髓间充质干细胞（mesenchymal stem cells,MSCs）对高糖作用下肾小球系膜细胞炎症因子及NF-κB信号通路的影响。方法 体外高糖培养小鼠肾小球系膜细胞,分为6组：对照组、糖尿病肾病（diabetic nephropathy,DN）组、MSCs组、MSCs+PTX 0.1 mmol·L^-1组、MSCs+PTX 0.3 mmol·L^-1组和MSCs+PTX 1 mmol·L^-1组。采用ELISA检测各组系膜细胞IL-6和TNF-α含量,采用Western blotting检测各组系膜细胞中NF-κB p65,IKKα及IKKβ蛋白的表达。结果 与对照组相比,DN组系膜细胞的IL-6和TNF-α含量显著增高（P<0.05）,NF-κB p65、IKKα及IKKβ蛋白相对表达量显著升高（P<0.05）。与DN组相比,MSCs组及MSCs组联合不同浓度PTX干预组的系膜细胞分泌的IL-6及TNF-α含量出现明显降低（P<0.05）,NF-κB p65、IKKα及IKKβ蛋白表达量显著降低（P<0.05）。与MSCs组比较,MSCs+PTX 0.1 mmol·L^-1组、MSCs+PTX 0.3 mmol·L^-1组及MSCs+PTX 1 mmol·L^-1组的IL-6和TNF-α含量显著下降（P<0.05）,NF-κB p65、IKKα和IKKβ的蛋白相对表达量明显降低（P<0.05）,且呈现PTX浓度依赖性。结论 PTX联合MSCs通过抑制高糖诱导下肾小球系膜细胞中NF-κB信号通路的表达及炎症因子水平对DN具有一定的治疗作用。     

依普利酮对糖尿病肾病大鼠的保护机制研究

目的 探讨依普利酮对糖尿病肾病（diabetic nephropathy,DN）大鼠的保护机制。方法 DN模型大鼠随机分成模型组、依普利酮组（40 mg·kg^-1）、阳性对照组（缬沙坦,20 mg·kg^-1）,另设正常组。灌胃给药8周。全自动生化分析仪检测24 h尿蛋白、血肌酐及血糖化血红蛋白水平;HE染色行肾组织病理形态学观察;ELISA检测肾组织IL-6、TNF-α和MCP-1水平;qPCR检测TLR4、NF-κB p65 mRNA水平,Western blot法检测肾组织TLR4、NF-κB p65蛋白水平。结果 与模型组比较,依普利酮组大鼠24 h尿蛋白、血肌酐及血糖化血红蛋白水平均明显下降（P<0.05或P<0.01）;肾组织病理变化有不同程度的改善;肾组织IL-6、TNF-α和MCP-1水平均明显下降（P<0.05或P<0.01）,TLR4、NF-κB p65 mRNA水平和TLR4、NF-κB p65蛋白水平明显下降（P<0.01）。结论 依普利酮能有效地改善DN大鼠的炎症水平,机制可能与下调IL-6、TNF-α、MCP-1、TLR4、NF-κB p65水平有关。     

雪莲注射液对重症急性胰腺炎患者的治疗作用

目的　探讨雪莲注射液对重症急性胰腺炎（SAP）的治疗作用。方法　将50例SAP患者采用随机数字表法分为常规治疗组（给予常规治疗）和雪莲注射液组（给予常规治疗+0.5%雪莲注射液肌内注射），各25例；另择健康体检者25例为正常对照组（不给予任何治疗）。治疗前及治疗后10 d，采用双抗体夹心酶联免疫吸附试验（ELISA）检测血清Beclin-1、微管相关蛋白1轻链3（LC3）水平，ELISA法检测血清核因子（NF）-κB p65、肿瘤坏死因子（TNF）-α、白细胞介素（IL）-1β及IL-10水平。评估常规治疗组和雪莲注射液组患者急性生理与慢性健康评分（APACHE）Ⅱ及胰腺改良CT严重指数评分（MCTSI），并记录其住院时间和腹痛缓解时间。结果　治疗前，常规治疗组和雪莲注射液组血清Beclin-1、LC3、NF-κB p65、TNF-α、IL-1β 和IL-10水平均明显高于正常对照组（P＜0.05）。治疗后10 d常规治疗组和雪莲注射液组血清Beclin-1、LC3、NF-κB p65、TNF-α 和IL-1β水平较治疗前降低，且雪莲注射液组低于常规治疗组；IL-10水平较治疗前升高，且雪莲注射液组高于常规治疗组（P＜0.05）。常规治疗组和雪莲注射液组APACHEⅡ、胰腺MCTSI评分较治疗前降低，且雪莲注射液组低于常规治疗组（P＜0.05）。雪莲注射液组住院时间和腹痛缓解时间均低于常规治疗组（P＜0.05）。结论　雪莲注射液对SAP患者有较好的辅助治疗作用，其作用机制与抑制胰腺腺泡细胞异常自噬及阻断炎症反应NF-κB信号通路有关。     

狐臭柴茎挥发油体外抗炎活性及基于NF-κB和MAPKs信号通路作用机制的研究

目的:探究狐臭柴茎挥发油的体外抗炎活性及其作用机制。方法:通过水蒸气蒸馏法制备狐臭柴茎挥发油,采用GC-MS对其化学成分进行分析。通过Griess法和ELISA法测定挥发油对LPS诱导RAW264.7细胞上清液中一氧化氮(NO)、肿瘤坏死因子α(TNF-α)、白细胞介素6(IL-6)水平的影响;qRT-PCR检测iNOS、COX-2、TNF-α、IL-6、IL-1β mRNA的表达;Western blot测定挥发油对iNOS、COX-2、NF-κB和MAPKs信号通路蛋白的影响。结果:从挥发油中共鉴定出74种化学成分,其中主要的化学成分是茅术醇(13.50%)。挥发油显著抑制NO、TNF-α和IL-6的分泌(P＜0.01),同时降低了促炎因子(TNF-α、IL-6和IL-1β)和促炎酶(iNOS和COX-2)的mRNA表达水平(P＜0.01)。Western blot研究表明挥发油能下调NF-κB信号通路细胞核p65蛋白表达、p65和IκBα磷酸化(P＜0.05或P＜0.01)。此外,还降低了MAPKs信号通路p38、JNK和ERK蛋白的磷酸化(P＜0.01)。结论:狐臭柴茎挥发油对LPS诱导RAW264.7细胞炎症模型具有较好的抗炎效果,其内在的分子机制与下调NF-κB和MAPKs信号通路有关。