NF-kappa B p65和VEGF在原发性肝癌中的表达及意义

[目的]探讨核转录因子(NF-kappa B p65)和血管内皮生成因子(VEGF)在晚期原发性肝癌(HCC)组织和正常肝脏组织中的表达及其意义。[方法]采用免疫组织化学染色SP法检测65例晚期HCC组织切片(其中36例直径≥5cm,16例5cm>直径>2cm,13例直径≤2cm;28例肝内病灶数目大于1个,37例肝内病灶数目为1个)和30例正常肝脏组织(对照组)中NF-kappa B p65和VEGF抗体的表达水平,采用秩和检验方法分析其差异性,并再以直线相关方法分析NF-kappa B p65和VEGF在HCC中表达的相关性。[结果]各肿瘤组随肿瘤直径的增大,NF-kappa B p65和VEGF表达水平均出现递增的趋势。肝内(肿瘤数目>1个)NF-kappa B p65和VEGF表达水平强于肝内无转移组(P<0.05)。NF-kappa B p65和VEGF在HCC中表达呈正相关。[结论]VEGF有促进肝癌生长和侵袭转移作用,而NF-kappaBp65在HCC生长中有促进VEGF表达上调的作用。

离子硅对成骨细胞NF-kappa B核内转录因子活性的影响

目的研究离子硅对体外培养的成骨细胞NF-kappa B核转录因子活性的影响。方法分别用终浓度为1 mmol/L和2 mmol/L离子硅(SiO32)-处理MC3T3-E1成骨细胞,处理时间分别为6、12、24和48 h,设置对照组(不加处理因素);采用流式细胞术检测细胞周期,计算细胞的增殖指数;Westernblotting方法检测NF-kappa B信号通路的相关蛋白表达量及其变化。结果流式细胞术结果显示,与对照组相比,1 mmol/L浓度的离子硅处理24 h组和48 h组,MC3T3-E1细胞增殖明显;Western blot结果显示,1 mmol/L浓度的离子硅促进成骨细胞增殖与p-NF-kappa B表达上升密切相关。结论骨材料中释放的微量的硅不会引起成骨细胞损伤,相反,微量的硅酸盐可能通过激活NF-kappa B诱导成骨细胞增殖。

非小细胞肺癌中NF-kappa B的表达与凋亡的关系

目的:研究核因子kappa B(nuclear factor kappa B,NF-kappa B)在非小细胞肺癌中的表达,探讨不同NF-kappa B表达的非小细胞的凋亡率,明确NF-kappa B在非小细胞肺癌中的临床意义。方法:应用Western blot检测了45例从2005年10月到2005年12月手术切除的非小细胞肺癌的新鲜标本,并用Tunel法测其凋亡率。结果:在45例患者中,NF-Kappa B的相对量是0.6047±0.3572,而且分化差的非小细胞肺癌中的NF-kappa B的表达比分化好的非小细胞肺癌高(P<0.05);在NF-kappa B高表达中肺癌细胞的凋亡率为56.4%,而在低表达中则为76.7%(P<0.05)。结论:NF-kappa B的表达与非小细胞肺癌的分化相关,在非小细胞肺癌中,NF-kappa B抑制凋亡,并在非小细胞肺癌的形成和发展中起重要作用,或许可以作为基因治疗的靶点为非小细胞肺癌的诊治提供新的思路。

NF-kappa B抑制剂PDTC抑制IL-1β诱导软骨细胞生成NO的实验研究

为探讨PDTC对IL 1β诱导的大鼠软骨细胞生成NO的影响 ,寻找抑制NO生成的新途径。分离并培养大鼠软骨细胞 ,加入不同度的PDTC ,以IL 1β刺激软骨细胞 ,RT PCR检测iNOS的mRNA表达 ,NO检测试剂盒检测NO的含量。结果显示PDTC能显著抑制IL 1β诱导的iNOSmRNA的表达及NO的生成且呈剂量依赖性。表明PDTC能抑制IL 1β诱导的NO生成 。

17β-雌二醇抑制NF-kappa Bp65表达对CCl_4诱导大鼠肝纤维化中肝细胞损伤的意义

目的探索17β-雌二醇(E2)抑制NF-kappa Bp65的表达在四氧化碳(CCl4)诱导Wistar大鼠肝纤维化中肝细胞损伤的意义。方法采用实时荧光定量PCR(SYBR GREEN)技术测量雌二醇治疗的肝纤维化模型大鼠肝脏组织中雌激素受体α(ERα)mRNA和NF-kappa Bp65mRNA的表达;采用免疫组化S-P方法检测肝细胞NF-kappa Bp65和ICAM-1表达并分析与肝细胞损害的关系。结果雌二醇治疗组的肝细胞纤维化模型大鼠ERαmRNA表达高于对照组和他莫昔芬组(P<0.05),而NF-kappa Bp65和ICAM-1表达以及ICAM-1免疫组化表达则低于对照组和他莫昔芬组(P<0.05);雌二醇治疗组的肝细胞损伤的程度也低于对照组和他莫昔芬组。结论E2通过ERα途径抑制NF-kappa Bp65在大鼠肝细胞中的表达,从而减轻了肝细胞的损伤。

Activation of TLR-4 and liver injury via NF-kappa B in rat with acute cholangitis

BACKGROUND: Toll-like receptors (TLRs) are a family of type 1 transmembrane receptors, which can recognize different pathogen-associated molecular patterns. Among them, TLR-4 is specific to lipopolysaccharide. It transfers the infection signal into the cell and promotes the translocation of nuclear factor kappa B (NF-kappa B) to the nucleus and the subsequent transcriptional activation of genes encoding pro- and anti-inflammatory cytokines and chemokines. Acute cholangitis (AC) is a common biliary tract infection in oriental countries, and often leads to liver injury. The activation of TLR-4 and its significance in liver injury in rats with AC remain unclear. METHODS: Rat models of AC (biliary tract obstruction+E. coli injection, n=36) and control models (biliary tract obstruction+saline, n=18) were made. Liver tissue injury was investigated by pathological examination. The levels of serum TNF-alpha and IL-10 were measured by enzyme-linked immunosorbent assay, and the expressions of TLR-4, NF-kappa B mRNAs and proteins in the liver were detected by RT-PCR, immunohistochemical staining and Western blotting, respectively. RESULTS: Severe liver tissue injury in rats with AC was evident as shown by pathological examination. TLR-4 and NF-kappa B were strongly expressed in the cytoplasm of hepatocytes in the AC group. They were negative or slightly positive in the control group. TLR-4 mRNA and protein in the liver of rats with AC increased 1 hour after biliary tract ligation and E. coli injection, and peaked at 6 hours after surgery. Twenty-four hours later, they began to decrease. The expression of TLR-4 was paralleled by that of NF-kappa B in the liver and TNF-alpha in serum. CONCLUSION: The higher expression of TLR-4 in the liver of rats with AC may be involved in liver injury through the activation of NF-kappa B and release of cytokines such as TNF-alpha.

Expression of NF-kappaB in rotavirus-induced damage to the liver and biliary tract in neonatal mice

BACKGROUND: Biliary atresia, the etiology of which still remains unclear, occurs exclusively in newborns and most are infected with rotavirus. In this study, we aimed to investigate the histopathological patterns of different kinds of rotavirus in the liver and biliary tract of neonatal mice and the expression of NF-kappa B in the liver and biliary tract of infected mice. METHODS: Twenty-three adult mice (8 were male and 15 female) were divided into 8 breeding pairs, and each pair (I male and 2 females) was housed in a cage in a laminar flow hood. Newborn mice, 24-48 hours old were randomly divided into A, B and C groups. The A and B groups were respectively inoculated with MMU18006 and SA11 rotavirus through the intraperitoneal route, while group C as blank control was only inoculated with culture medium. The liver was dissected after 5, 10, 15, 21 and 28 days; the weight of each mouse and the histopathological patterns in the liver were recorded. The expression of NF-kappa B in the liver and intrahepatic bile ducts was detected by immunohistochemical staining and the expression intensity was analyzed with a GT-2 imaging instrument. RESULTS: The average increase in weight of infected mice was significantly slower than that of the normal control, while the growth rate of group A (injected with MMU18006 rotavirus) was slower than that of group B (SA11 rotavirus). In infected mice, the acute and chronic inflammation of liver and intra- and extra-hepatic bile ducts was more significant in group A. Stenosis was found in most intrahepatic bile ducts, and sporadically in extrahepatic bile ducts. The expression of NF-kappa B in infected mice was dramatically higher than that of the normal control, while the expression in group A was higher than in group B. CONCLUSIONS: Significant damage to the liver and biliary tract of neonatal mice can be induced by inoculating MMU18006 rotavirus through the intraperitoneal route, which is very similar to the pathology of biliary atresia in the newborn human. Similar inoculation with SA11 rotavirus can only result in moderate impairment that disappears quickly. The difference of pathogenicity between the two rotaviruses may depend on their differing capacities to increase the expression of NF-kappa B in the liver and biliary tract.

Effects of Dan-shao-hua-xian on expression of PPAR-gamma and NF-kappa B in rat liver fibrosis

BACKGROUND: Peroxisome proliferator-activated receptor gamma (PPAR-gamma) and nuclear factor kappa B (NF-kappa B) play important roles in liver fibrosis. This study aimed to investigate the effects of Dan-shao-hua-xian, a preparation of traditional Chinese medicine, on the expression of PPAR-gamma and NF-kappa B in the fibrotic livers of rats. METHODS: Seventy Wistar rats were randomly divided into 4 groups: treatment (model, 8 weeks+treatment, 8 weeks; group A), natural recovery (model, 8 weeks+ saline, 8 weeks; group B), model (model only, 8 weeks; group Q, and control (normal, untreated, 16 weeks; group D). Each group consisted of 20 rats (except for group D, which had 10). Fibrotic liver models were induced in rats by subcutaneous injection of CCI4, oral administration of alcohol and a high-lipid/low-protein diet for 8 weeks. After the models were established, the rats in group A were orally given Dan-shao-hua-xian capsules daily for another 8 weeks. Then, the liver indices serum hyaluronic acid (HA), tumor necrosis factor-alpha (TNF-alpha) and alanine aminotransferase (ALT) were measured. The degree of hepatic fibrosis was evaluated by optical microscopy. Hydroxyproline (Hyp) in the liver tissue was determined. The expression of PPAR-gamma was detected by immunohistochemical techniques. The protein levels of PPAR-gamma and NF-kappa B were determined by Western blotting. RESULTS: The concentrations of serum HA, TNF-alpha and Hyp in group C increased compared with group D (P<0.05), and they decreased in group A compared with group C (P<0.05). The expression of PPAR-gamma in group C decreased compared with group D (P<0.05), and it increased in group A compared with groups B and C (P<0.05). Similarly, Western blotting showed that the expression of PPAR-gamma in group C decreased compared with group D, and it increased in group A compared with group C. The expression of NF-kappa B increased in group C compared with group D (P<0.05), and it decreased in group A compared with group C (P<0.05). CONCLUSION: Dan-shao-hua-xian capsules enhance the expression of PPAR-gamma but decrease that of TNF-alpha and NF-kappa B in the liver tissues of CCI4-induced hepatic fibrotic rats. These effects may play a role in its activity in treating hepatic fibrosis.

肺炎衣原体感染和高脂血症对心肌细胞NF-kappa B和AP-1的影响

目的:探讨肺炎衣原体感染和高脂血症对心肌细胞炎症的影响。方法:用间接免疫荧光的方法检测肺炎衣原体感染或给予高脂饮食的C57BL/6J小鼠,观察NF-κB亚单位P50和c-Fos在小鼠心肌细胞中表达程度。结果:肺炎衣原体感染和高脂血症能引起心肌细胞中P50和c-Fos的激活。对照组心肌细胞核中未见P50和c-Fos的表达,而3个实验组心肌细胞核中都有不同程度的P50和c-Fos表达。实验组和对照组比较P<0.01,在3个实验组间无显著差异。结论:在肺炎衣原体感染和高脂血症形成的早期,心肌细胞的炎症通路已被激活。

Relationship between the Expression of NF-kappa B and Apoptosis in Non-Small Cell Lung Cancer

OBJECTIVE To study the expression of the nuclear factor kappa B (NF-kappa B) in non-small cell lung cancer (NSCLC),to explore the apoptotic ratio in NSCLC related to different NF-kappa Bs,and to understand the clinical significance of NF-kappa B in NSCLC apoptosis. METHODS NF-kappa B expression in 45 new samples of NSCLC,collected during a period from October to December,2005,was assayed using Western blots,and the apoptotic ratio of NSCLC was determined by the Tunel method. RESULTS Of the 45 patients,the average relative expression of NF-kappa B was 0.6047±0.3572.The expression of NF-kappa B was higher in the poorly differentiated lung cancer cells than in the well-differentiated tumors(P<0.05).The apoptotic ratio was 56.4% in the lung cancer cells with higher NF-kappa B expression,and was 76.7% in those with lower NF-kappa B expression(P<0.05). CONCLUSION The expression of NF-kappa B is correlated with the differentiation of NSCLC.NF-kappa B inhibits apoptosis in NSCLC.As a transcription factor,NF-kappa B plays a very important role both in formation and in development of NSCLC. NF-kappa B might serve as a target for NSCLC gene therapy.

雌激素受体α与NF-kappa BP65在Buerger病病变血管内皮细胞的表达和意义

目的研究血栓闭塞性脉管炎(Buerger病)病变血管内皮细胞中雌激素受体α(ERα)与核转录核因子(NF-kappaB)表达的情况和意义。方法采用免疫组织化学染色S-P法检测30例男性Buerger病患者动脉血管和30例正常男性动脉血管内皮细胞的ERα、NF-kappaBP65蛋白,细胞间黏附分子-1(ICAM-1)和血管内皮细胞黏附分子-1(VCAM-1)的表达水平,并采用直线回归方法分析其相关性。结果(1)与正常组相比较,Buerger病患者病变血管内皮细胞ERα、NF-kappaBP65、ICAM-1以及VCAM-1表达水平均呈显著性增强(P<0.05)。(2)60例动脉血管内皮细胞检测数据提示ERα与NF-kappaB表达呈直线回归关系(B=0.706,P<0.05);NF-kappaBP65表达与ICAM-1表达呈直线回归关系(b=0.392,P<0.05);NF-kappaBP65表达与VCAM-1表达也呈直线回归关系(b=1.094,P<0.05)。结论NF-kappaB的激活导致Buerger病患者体内ICAM-1和VCAM-1表达增强,是Buerger病患者血管损伤的起始因素之一。Buerger病患者体内激活的NF-kappaB诱导体内雌激素代偿性增高,进一步促使ERα表达增强,并通过雌激素-ERα途径,抑制NF-kappaB的活性。

Effects of ivabradine on Notch and NF-kappa B signaling pathway in myocardial cells of rats with myocardial infarction

Objective:To investigate the effects of ivabradine on Notch and NF-kappa B signaling pathway in myocardial cells of rats with myocardial infarction.Methods: The model of myocardial infarction was established by ligating the left anterior descending coronary artery. The surviving rats were randomly divided into model group (MI group,n=8) and treatment group (IVA group,n=8). Rats with the same location but without ligation of the left anterior descending coronary artery were used as control group (CON group,n = 8). IVA was administered for 28 d. Hemodynamic and cardiac function indexes of all rats were measured: heart rate (HR), systolic pressure (SBP), diastolic pressure (DBP), mean arterial pressure (MAP), left ventricular systolic pressure (LVSP), left ventricular end-diastolic pressure (LVEDP) and maximum rate of increase and decrease of left ventricular internal pressure (+dp/dt);left ventricular mass index, left ventricular cross-sectional diameter and infarct area;The expression of Notch signaling pathway components mRNA (Notch-1, Dll-4, Hes-1) in rat cardiomyocytes was detected by PT-PCR, and the expression of DICD-1 and P65 protein was detected by western-blot. One-way ANOVA was used for comparison between groups, and SNK was used for comparison between groups.Results: SBP, DBP, MAP, LASP, LVEDP and (+dp/dt) in MI group were lower than those in control group (P<0.05), while IVA was higher than those in MI group (P<0.05). Left ventricular mass index and left ventricular sectional diameter in MI group were significantly higher than those in control group (P<0.05), but lower than those in IVA group (P<0.05). The expression of Notch-1 in MI group was significantly higher than that in control group (P<0.05), but lower than that in IVA group (P<0.05). There was no significant difference in the expression of Dll-4 and Hes-1 mRNA between the three groups (P>0.05). The expression levels of NICD-1 and P 65 in MI group were significantly higher than those in CON group (P<0.05), but lower than those in IVA group (P<0.05). Conclusion: IVA may improve cardiac function and inhibit ventricular remodeling in rats with myocardial infarction through Notch and NF-kappa B signaling pathways.

岩黄连总碱和脱氢阿卟卡维丁对Tca8113中NF-kappa B表达活性的影响

目的:研究中草药岩黄连总碱(YHL-TA)和脱氢阿卟卡维丁(YHL-2)对人舌鳞癌细胞Tca8113细胞中NF-kappaB表达活性的影响,并进一步探讨其抗癌机制。方法:采用PCR法和Western-blotting法检测经YHL-TA和YHL-2作用后的Tca8113细胞中NF-kappa B核酸水平以及蛋白水平的表达活性变化。结果:YHL-TA和YHL-2均能抑制Tca8113细胞增殖,并在核酸水平和蛋白水平抑制NF-kappa B P50、P65亚基的表达活性。其中YHL-2抑制作用最强;并且随作用时间延长和药物浓度的增高,抑制作用增强。结论:YHL-TA和YHL-2可以明显抑制Tca8113细胞的增殖,并显著降低其NF-kappa B的表达,其中YHL-2作用最明显。这可能是岩黄连抗癌作用机制之一。

微小核糖核酸mmu-miR-8114和mmu-miR-3473b在细粒棘球蚴致敏小鼠中的调控作用

目的探索微小核糖核酸(miRNAs)在通过细粒棘球蚴感染引起的小鼠过敏反应中的调节作用。方法建立小鼠体内棘球蚴病动物模型,收集脾脏单核细胞进行转录组测序。比较过敏性小鼠和非过敏小鼠之间mRNAs和miRNAs的差异表达。使用Targetscan和miRanda软件预测mRNAs和miRNAs之间的靶向调控关系,并通过蛋白质—蛋白质相互作用(PPI)网络分析,识别核心基因,通过富集分析探讨核心基因的生物学作用。最后利用qRT-PCR和Western blot验证关键结果。结果过敏与非过敏小鼠之间存在1642个差异表达的mRNAs。对18个差异表达的miRNAs进行分析,鉴定出60个差异表达的靶标基因,其中在PPI网络中连通度最大的前10个基因被认定为核心基因。富集分析显示核心基因主要参与NF-kappa B信号通路。基于miRNAs与mRNAs之间的负调控作用以及双荧光素酶报告系统发现mmu-miR-8114与Atf3以及mmu-miR-3473b与Myd88具有靶向调控关系,并与NF-kappa B信号通路有关。通过qRT-PCR验证了mmu-miR-8114和mmu-miR-3473b在过敏小鼠中下调表达,Atf3、Myd88、Socs3在过敏小鼠中上调表达。qRT-PCR和Western blot结果发现NF-kappa B信号通路在过敏小鼠中的活性增加。结论本研究揭示了mmu-miR-8114和mmu-miR-3473b通过NF-kappa B信号通路调控导致小鼠过敏反应的重要作用,为理解细粒棘球蚴感染引起的过敏反应机制提供了新的见解。

基于网络药理学和分子对接技术的灵芝改善2型糖尿病作用机制

目的应用网络药理学方法探讨灵芝在改善2型糖尿病(T2DM)中的作用机制。方法通过TCMSP筛选灵芝化学成分,使用SWISS Target Prediction导入主要成分的SMILE name获取单个基因名;结合DisGeNET和GeneCards获取疾病基因;利用Venn数据库筛选出交集靶点;在微生信平台构建活性成分和疾病靶点网络;利用STRING和Cytoscape数据库构建PPI网络;使用DAVID数据库进行GO和KEGG功能富集分析;使用AutoDock数据库进行分子对接。结果灵芝和2型糖尿病的共同靶点有146个;PPI网络包含灵芝和2型糖尿病共同目标有146个节点和2201条“边”;筛选出灵芝5个活性成分及与T2DM相关靶点146个;重要活性成分包括Methyl lucidenate F、环氧灵芝醇A、赤灵芝酸E、赤芝酮A、Methyl lucidenate Q,核心靶点包括PGR、PTPN1、NR3C2等;KEGG主要通路富集于卵母细胞减数分裂、NF-kappa B信号通路、长寿调节途径等;分子对接结果显示,化合物和重要靶位之间具有很强的融合作用。结论本研究进一步发现了灵芝中含有Methyl lucidenate F、环氧灵芝醇A、赤紫芝酸e、赤芝酸A、Methyl lucidenate Q等活性成分,为灵芝治疗2型糖尿病的核心组分,通过控制关键治疗靶点NR3C2和HSD11B2,影响NF-kappaB binding信息通路,从而达到改善2型糖尿病的效果。

苦参碱对特应性皮炎炎症、氧化应激和伤口愈合的影响

目的评估苦参碱对体外特应性皮炎(AD)模型中HaCaT角质形成细胞的炎症、氧化和迁移反应及伤口愈合的影响。方法采用MTT法评估苦参碱的细胞毒性,依据实验结果,将HaCaT细胞分为对照组,模型组,苦参碱0.05、0.1和0.2 mmol/L组,模型组采用10μg/L肿瘤坏死因子-α(TNF-α)/干扰素-γ(IFN-γ)刺激HaCaT细胞24 h,苦参碱0.05、0.1和0.2 mmol/L组分别用相应浓度的苦参碱预处理细胞1 h,然后用10μg/L TNF-α/IFN-γ刺激24 h。酶联免疫吸附试验(ELISA)法测定白细胞介素(IL)-6、IL-8和IL-1β和胸腺和活化调节趋化因子(TARC)、巨噬细胞衍生趋化因子(MDC)、调节活化正常T细胞表达和分泌的因子(RANTES)的水平;实时荧光定量PCR检测抗氧化基因表达水平;划痕愈合实验分析细胞迁移;免疫组织化学分析核因子(NF)-κB p65的核易位;Western blot检测p38、细胞外调节蛋白激酶(ERK)和p65蛋白的磷酸化水平。结果与模型组比较,苦参碱0.1和0.2 mmol/L组降低IL-6、IL-1β、IL-8和趋化因子的表达,增强超氧化物歧化酶(SOD)1、SOD2、过氧化氢酶(CAT)、谷胱甘肽过氧化物酶(GPx)的表达,并促进划痕愈合率(P<0.05)。此外,苦参碱0.1和0.2 mmol/L可抑制p38、ERK和p65蛋白的磷酸化及p65的核易位。结论苦参碱具有抗炎和抗氧化特性,并刺激角质形成细胞AD模型的伤口闭合。