Effect of nuclear factor-κB p65 ASOND on I typ collagen expression and rat hepatic stellate cells proliferation

Objective Sstudy effect of nuclear factor-κB ASOND on I type collagen expression and rat hepatic stellate cells(HSC)proliferation.Methods Rat HSCs were separated by affusing and digestingof Ⅳ type collagenenzyme and density acentric method.Lipid-mediated NF-κB p65 ASOND(0.001,0.01,0.1,1μmol/L)Was transferred into rat HSCs.Toxicity of HSCs caused by NF-κB p65 ASOND and activity of LDH were determined by trypan blue staining.Proliferation affection of transferring NF-κB p65 ASOND into HSCs was determined by MTT.In different concentration NF-κB p65 ASOND.expression of Ⅰ type collagen stimulated by 1mg/L TNF-αwas determined by RT-PCR and ELISA.Results After transfection of NF-κB p65 ASODN,expression of NF-κB protein in HSCs was decreasing.Toxicity experiment indicated that NF-κB p65 ASOND of different concentration(0.001,0.01,0.1 and 1.0 μmol/L)had no effect on HSCs livability and LDH activity(P<0.05).Four different concentration NF-κ B p65 ASOND could restrain HSCs proliferation stimulated by 1 mg/L TNF-α.The expression of I type collagen and mRNA stimulated by 1mg/LTNF-αwas increased,and had a positive correlation with concentration(P>0.05).Conclusion NF-κB p65 ASOND may depress NF-κB activity to restrain HSCs proliferation and Ⅰ type collagen expression,and reduce extracellular matrix.     

Effect of nuclear factor-κB p65 ASOND on I typ collagen expression and rat hepatic stellate cells proliferation

Objective Sstudy effect of nuclear factor-κB ASOND on I type collagen expression and rat hepatic stellate cells(HSC)proliferation.Methods Rat HSCs were separated by affusing and digestingof Ⅳ type collagenenzyme and density acentric method.Lipid-mediated NF-κB p65 ASOND(0.001,0.01,0.1,1μmol/L)Was transferred into rat HSCs.Toxicity of HSCs caused by NF-κB p65 ASOND and activity of LDH were determined by trypan blue staining.Proliferation affection of transferring NF-κB p65 ASOND into HSCs was determined by MTT.In different concentration NF-κB p65 ASOND.expression of Ⅰ type collagen stimulated by 1mg/L TNF-αwas determined by RT-PCR and ELISA.Results After transfection of NF-κB p65 ASODN,expression of NF-κB protein in HSCs was decreasing.Toxicity experiment indicated that NF-κB p65 ASOND of different concentration(0.001,0.01,0.1 and 1.0 μmol/L)had no effect on HSCs livability and LDH activity(P<0.05).Four different concentration NF-κ B p65 ASOND could restrain HSCs proliferation stimulated by 1 mg/L TNF-α.The expression of I type collagen and mRNA stimulated by 1mg/LTNF-αwas increased,and had a positive correlation with concentration(P>0.05).Conclusion NF-κB p65 ASOND may depress NF-κB activity to restrain HSCs proliferation and Ⅰ type collagen expression,and reduce extracellular matrix.     

Effect of nuclear factor-κB p65 ASOND on I typ collagen expression and rat hepatic stellate cells proliferation

Objective Sstudy effect of nuclear factor-κB ASOND on I type collagen expression and rat hepatic stellate cells(HSC)proliferation.Methods Rat HSCs were separated by affusing and digestingof Ⅳ type collagenenzyme and density acentric method.Lipid-mediated NF-κB p65 ASOND(0.001,0.01,0.1,1μmol/L)Was transferred into rat HSCs.Toxicity of HSCs caused by NF-κB p65 ASOND and activity of LDH were determined by trypan blue staining.Proliferation affection of transferring NF-κB p65 ASOND into HSCs was determined by MTT.In different concentration NF-κB p65 ASOND.expression of Ⅰ type collagen stimulated by 1mg/L TNF-αwas determined by RT-PCR and ELISA.Results After transfection of NF-κB p65 ASODN,expression of NF-κB protein in HSCs was decreasing.Toxicity experiment indicated that NF-κB p65 ASOND of different concentration(0.001,0.01,0.1 and 1.0 μmol/L)had no effect on HSCs livability and LDH activity(P<0.05).Four different concentration NF-κ B p65 ASOND could restrain HSCs proliferation stimulated by 1 mg/L TNF-α.The expression of I type collagen and mRNA stimulated by 1mg/LTNF-αwas increased,and had a positive correlation with concentration(P>0.05).Conclusion NF-κB p65 ASOND may depress NF-κB activity to restrain HSCs proliferation and Ⅰ type collagen expression,and reduce extracellular matrix.     

Effect of nuclear factor-κB p65 ASOND on I typ collagen expression and rat hepatic stellate cells proliferation

Objective Sstudy effect of nuclear factor-κB ASOND on I type collagen expression and rat hepatic stellate cells(HSC)proliferation.Methods Rat HSCs were separated by affusing and digestingof Ⅳ type collagenenzyme and density acentric method.Lipid-mediated NF-κB p65 ASOND(0.001,0.01,0.1,1μmol/L)Was transferred into rat HSCs.Toxicity of HSCs caused by NF-κB p65 ASOND and activity of LDH were determined by trypan blue staining.Proliferation affection of transferring NF-κB p65 ASOND into HSCs was determined by MTT.In different concentration NF-κB p65 ASOND.expression of Ⅰ type collagen stimulated by 1mg/L TNF-αwas determined by RT-PCR and ELISA.Results After transfection of NF-κB p65 ASODN,expression of NF-κB protein in HSCs was decreasing.Toxicity experiment indicated that NF-κB p65 ASOND of different concentration(0.001,0.01,0.1 and 1.0 μmol/L)had no effect on HSCs livability and LDH activity(P<0.05).Four different concentration NF-κ B p65 ASOND could restrain HSCs proliferation stimulated by 1 mg/L TNF-α.The expression of I type collagen and mRNA stimulated by 1mg/LTNF-αwas increased,and had a positive correlation with concentration(P>0.05).Conclusion NF-κB p65 ASOND may depress NF-κB activity to restrain HSCs proliferation and Ⅰ type collagen expression,and reduce extracellular matrix.     

Effect of nuclear factor-κB p65 ASOND on I typ collagen expression and rat hepatic stellate cells proliferation

Objective Sstudy effect of nuclear factor-κB ASOND on I type collagen expression and rat hepatic stellate cells(HSC)proliferation.Methods Rat HSCs were separated by affusing and digestingof Ⅳ type collagenenzyme and density acentric method.Lipid-mediated NF-κB p65 ASOND(0.001,0.01,0.1,1μmol/L)Was transferred into rat HSCs.Toxicity of HSCs caused by NF-κB p65 ASOND and activity of LDH were determined by trypan blue staining.Proliferation affection of transferring NF-κB p65 ASOND into HSCs was determined by MTT.In different concentration NF-κB p65 ASOND.expression of Ⅰ type collagen stimulated by 1mg/L TNF-αwas determined by RT-PCR and ELISA.Results After transfection of NF-κB p65 ASODN,expression of NF-κB protein in HSCs was decreasing.Toxicity experiment indicated that NF-κB p65 ASOND of different concentration(0.001,0.01,0.1 and 1.0 μmol/L)had no effect on HSCs livability and LDH activity(P<0.05).Four different concentration NF-κ B p65 ASOND could restrain HSCs proliferation stimulated by 1 mg/L TNF-α.The expression of I type collagen and mRNA stimulated by 1mg/LTNF-αwas increased,and had a positive correlation with concentration(P>0.05).Conclusion NF-κB p65 ASOND may depress NF-κB activity to restrain HSCs proliferation and Ⅰ type collagen expression,and reduce extracellular matrix.     

Effect of nuclear factor-κB p65 ASOND on I typ collagen expression and rat hepatic stellate cells proliferation

Objective Sstudy effect of nuclear factor-κB ASOND on I type collagen expression and rat hepatic stellate cells(HSC)proliferation.Methods Rat HSCs were separated by affusing and digestingof Ⅳ type collagenenzyme and density acentric method.Lipid-mediated NF-κB p65 ASOND(0.001,0.01,0.1,1μmol/L)Was transferred into rat HSCs.Toxicity of HSCs caused by NF-κB p65 ASOND and activity of LDH were determined by trypan blue staining.Proliferation affection of transferring NF-κB p65 ASOND into HSCs was determined by MTT.In different concentration NF-κB p65 ASOND.expression of Ⅰ type collagen stimulated by 1mg/L TNF-αwas determined by RT-PCR and ELISA.Results After transfection of NF-κB p65 ASODN,expression of NF-κB protein in HSCs was decreasing.Toxicity experiment indicated that NF-κB p65 ASOND of different concentration(0.001,0.01,0.1 and 1.0 μmol/L)had no effect on HSCs livability and LDH activity(P<0.05).Four different concentration NF-κ B p65 ASOND could restrain HSCs proliferation stimulated by 1 mg/L TNF-α.The expression of I type collagen and mRNA stimulated by 1mg/LTNF-αwas increased,and had a positive correlation with concentration(P>0.05).Conclusion NF-κB p65 ASOND may depress NF-κB activity to restrain HSCs proliferation and Ⅰ type collagen expression,and reduce extracellular matrix.     

Effect of nuclear factor-κB p65 ASOND on I typ collagen expression and rat hepatic stellate cells proliferation

Objective Sstudy effect of nuclear factor-κB ASOND on I type collagen expression and rat hepatic stellate cells(HSC)proliferation.Methods Rat HSCs were separated by affusing and digestingof Ⅳ type collagenenzyme and density acentric method.Lipid-mediated NF-κB p65 ASOND(0.001,0.01,0.1,1μmol/L)Was transferred into rat HSCs.Toxicity of HSCs caused by NF-κB p65 ASOND and activity of LDH were determined by trypan blue staining.Proliferation affection of transferring NF-κB p65 ASOND into HSCs was determined by MTT.In different concentration NF-κB p65 ASOND.expression of Ⅰ type collagen stimulated by 1mg/L TNF-αwas determined by RT-PCR and ELISA.Results After transfection of NF-κB p65 ASODN,expression of NF-κB protein in HSCs was decreasing.Toxicity experiment indicated that NF-κB p65 ASOND of different concentration(0.001,0.01,0.1 and 1.0 μmol/L)had no effect on HSCs livability and LDH activity(P<0.05).Four different concentration NF-κ B p65 ASOND could restrain HSCs proliferation stimulated by 1 mg/L TNF-α.The expression of I type collagen and mRNA stimulated by 1mg/LTNF-αwas increased,and had a positive correlation with concentration(P>0.05).Conclusion NF-κB p65 ASOND may depress NF-κB activity to restrain HSCs proliferation and Ⅰ type collagen expression,and reduce extracellular matrix.     

Effect of nuclear factor-κB p65 ASOND on I typ collagen expression and rat hepatic stellate cells proliferation

Objective Sstudy effect of nuclear factor-κB ASOND on I type collagen expression and rat hepatic stellate cells(HSC)proliferation.Methods Rat HSCs were separated by affusing and digestingof Ⅳ type collagenenzyme and density acentric method.Lipid-mediated NF-κB p65 ASOND(0.001,0.01,0.1,1μmol/L)Was transferred into rat HSCs.Toxicity of HSCs caused by NF-κB p65 ASOND and activity of LDH were determined by trypan blue staining.Proliferation affection of transferring NF-κB p65 ASOND into HSCs was determined by MTT.In different concentration NF-κB p65 ASOND.expression of Ⅰ type collagen stimulated by 1mg/L TNF-αwas determined by RT-PCR and ELISA.Results After transfection of NF-κB p65 ASODN,expression of NF-κB protein in HSCs was decreasing.Toxicity experiment indicated that NF-κB p65 ASOND of different concentration(0.001,0.01,0.1 and 1.0 μmol/L)had no effect on HSCs livability and LDH activity(P<0.05).Four different concentration NF-κ B p65 ASOND could restrain HSCs proliferation stimulated by 1 mg/L TNF-α.The expression of I type collagen and mRNA stimulated by 1mg/LTNF-αwas increased,and had a positive correlation with concentration(P>0.05).Conclusion NF-κB p65 ASOND may depress NF-κB activity to restrain HSCs proliferation and Ⅰ type collagen expression,and reduce extracellular matrix.     

Effect of nuclear factor-κB p65 ASOND on I typ collagen expression and rat hepatic stellate cells proliferation

Objective Sstudy effect of nuclear factor-κB ASOND on I type collagen expression and rat hepatic stellate cells(HSC)proliferation.Methods Rat HSCs were separated by affusing and digestingof Ⅳ type collagenenzyme and density acentric method.Lipid-mediated NF-κB p65 ASOND(0.001,0.01,0.1,1μmol/L)Was transferred into rat HSCs.Toxicity of HSCs caused by NF-κB p65 ASOND and activity of LDH were determined by trypan blue staining.Proliferation affection of transferring NF-κB p65 ASOND into HSCs was determined by MTT.In different concentration NF-κB p65 ASOND.expression of Ⅰ type collagen stimulated by 1mg/L TNF-αwas determined by RT-PCR and ELISA.Results After transfection of NF-κB p65 ASODN,expression of NF-κB protein in HSCs was decreasing.Toxicity experiment indicated that NF-κB p65 ASOND of different concentration(0.001,0.01,0.1 and 1.0 μmol/L)had no effect on HSCs livability and LDH activity(P<0.05).Four different concentration NF-κ B p65 ASOND could restrain HSCs proliferation stimulated by 1 mg/L TNF-α.The expression of I type collagen and mRNA stimulated by 1mg/LTNF-αwas increased,and had a positive correlation with concentration(P>0.05).Conclusion NF-κB p65 ASOND may depress NF-κB activity to restrain HSCs proliferation and Ⅰ type collagen expression,and reduce extracellular matrix.     

核因子-κB p65反义寡核苷酸对溃疡性结肠炎肠黏膜单个核细胞细胞因子表达的影响

探讨 NF- κB p6 5反义寡核苷酸对溃疡性结肠炎肠黏膜单个核细胞 NF- κB p6 5的表达以及对细胞因子释放的影响。3例溃疡性结肠炎患者 (未用过任何与溃疡性结肠炎治疗相关的药物 ,符合 1993年太原会议溃疡性结肠炎诊断标准 )的活检组织被用于固有层单个核细胞 (L PMC)的分离和培养 ,并用 NF- κB p6 5反义寡核苷酸 (A-SON:5 '- GGAACAGTTCGTCCATGG- 3')及错义寡核苷酸 (MSON:5 '- GGAACAGTTCGTCTATGG- 3')和地塞米松 (EDX)进行干预。采用 :1Western蛋白印迹分析检测 NF-κB p6 5蛋白表达情况 ;2逆转录聚合酶链反应 (RT-PCR)检测 IL- 1βm RNA和 IL- 8m RNA的表达 ;3酶联免疫吸附试验 (EL ISA)测定 IL- 1β,IL- 8的分泌水平。结果显示 ,NF-κB p6 5反义寡核苷酸可明显减少 L PMC的 NF-κB p6 5表达 ,阻断 L PS刺激引起的 IL - 1βm RNA和 IL -8m RNA的表达的增强以及两种细胞因子分泌水平均的增高 ,其作用明显强于地塞米松 (P<0 .0 5 )。结论认为 :NF-κB p6 5反义寡核苷酸有可能作为治疗溃疡性结肠炎的新基因药物 ,为治疗溃疡性结肠炎开辟了一条新途径     

Nrf2过表达对乙醇刺激下肝星状细胞激活与增殖及合成I型胶原的影响

 目的：探讨核因子E2相关因子2（nuclear factor E2-related factor 2,Nrf2）过表达对乙醇诱导下大鼠肝星状细胞系HSC-T6激活与增殖及I型胶原mRNA及蛋白表达水平的影响。方法：采用脂质体介导法对HSC-T6进行pEGFP-Nrf2重组质粒及pEGFP-N1空载质粒瞬时转染,将细胞分为正常对照组、乙醇刺激组、乙醇刺激+pEGFP-Nrf2质粒组和乙醇刺激+ pEGFP-N1空载质粒组。采用RT-PCR及Western blotting方法对HSC-T6中Nrf2、I型胶原及α-平滑肌肌动蛋白(α-smooth muscle actin,α-SMA)mRNA及蛋白表达水平进行检测,采用MTT法对HSC-T6细胞增殖水平进行检测,采用流式细胞术对HSC-T6细胞周期分布进行检测。结果：(1) 荧光显微镜下观察显示pEGFP-Nrf2质粒成功转染HSC-T6,转染后48h Nrf2 mRNA及蛋白表达水平较其余组显著升高（P＜0.05）。(2) 乙醇刺激组与乙醇刺激+ pEGFP-N1空载质粒组之间细胞增殖水平、I型胶原、α-SMA mRNA及蛋白表达水平差异无统计学意义（P＞0.05）,均明显高于正常对照组（P＜0.05）,细胞周期分布G1期比例下降,S期比例升高（P＜0.05）,而乙醇刺激+ pEGFP-Nrf2质粒组细胞增殖水平及I型胶原、α-SMA mRNA及蛋白表达水平与乙醇刺激组及乙醇刺激+ pEGFP-N1空载质粒组相比均显著下降（P＜0.05）,细胞周期分布G1期比例显著上升,S期比例显著下降（P＜0.05）,呈G1/S期阻滞。结论：Nrf2过表达可显著抑制乙醇对HSC-T6 I型胶原及α-SMA mRNA及蛋白表达的促进作用,使HSC-T6细胞周期发生G1/S期阻滞,抑制乙醇诱导的HSC-T6增殖水平的升高,提示其对乙醇诱导的HSC-T6细胞活化具有负性调控作用。     

PDGF-B反义寡脱氧核苷酸对大鼠肝星状细胞增殖及Ⅰ型胶原合成的影响

目的：探讨PDGF-B反义寡脱氧核苷酸(ASODN)对大鼠肝星状细胞（HSCs）增殖及Ⅰ型胶原合成的影响。方法：合成了特异性的PDGF-B硫代磷酸ASODN及其对照错义寡脱氧核苷酸(MSODN)，并将其加入至培养的HSCs。采用MTT法检测PDGF-B ASODN对HSCs的增殖抑制作用，RT-PCR检测PDGF-B和collagen-Ⅰ mRNA的表达，流式细胞仪与ELISA法分别检测PDGF-B的表达和Ⅰ型胶原的合成。 结果：PDGF-B ASODN在终浓度为10 μmol/L，作用HSCs-T6细胞48 h时，能明显地抑制其增殖，降低PDGF-B和collagen-ⅠmRNA的表达；FCM与ELISA分析表明，HSCs表达PDGF-B和合成Ⅰ型胶原都明显低于对照组，而对照组寡脱氧核苷酸在相同浓度下未见抑制效应。结论：PDGF-B ASODN可以抑制HSCs的增殖、Ⅰ型胶原的合成、内源性PDGF-B的表达，可能成为一种有用的抗肝纤维化基因治疗的药物。     

PDTC对肝纤维化大鼠核转录因子-κB、α-平滑肌肌动蛋白和Ⅰ型胶原表达影响研究

目的探讨吡咯烷二硫代氨基甲酸酯(PDTC)对二甲基亚硝胺(DMN)所致肝纤维化大鼠肝组织中核转录因子-κB(NF-κB)、α-平滑肌肌动蛋白(α-SMA)和Ⅰ型胶原(Col-1)表达的影响及其意义。方法雄性SD大鼠38只,随机分为A、B、C组。A组为正常对照组,B、C组再各自随机分为2周及4周组并腹腔注射DMN诱导大鼠肝纤维化模型,C组造模同时给予PDTC灌胃。应用化学发光凝胶电泳迁移率(EMSA)检测肝组织NF-κBp65活性;采用实时定量聚合酶链反应(Real-time PCR)检测肝组织NF-κBp65和Col-1的mRNA表达;应用免疫组化检测NF-κBp65、α-SMA和Col-1的表达。结果 B组及C组NF-κBp65活性及其mRNA表达、Col-1 mRNA表达、NF-κBp65免疫组化阳性细胞数、α-SMA及Col-1阳性面积均明显高于A组(P<0.01或P<0.05),且随着时间的延长,4周组高于2周组(P<0.01或P<0.05);同期比较发现C组NF-κBp65活性及其mRNA表达、Col-1 mRNA表达、NF-κBp65免疫组化阳性细胞数、α-SMA及Col-1阳性面积均明显低于B组(P<0.01或P<0.05)。NF-κBp65活性与NF-κBp65 mRNA表达、Col-1 mRNA表达、NF-κBp65免疫组化阳性细胞数、α-SMA及Col-1阳性面积呈正相关(r=0.747,0.780,0.779,0.658,0.780,P均<0.01)。结论 NF-κB与大鼠肝纤维化密切相关;PDTC可能通过抑制NF-κB的活性及α-SMA、Col-1表达从而产生抗肝纤维化作用。     

NF-κB反义寡核苷酸对高糖诱导的HK-2细胞外基质表达的影响

目的观察NF-κBp65反义寡核苷酸(AS-ODN)对高糖诱导体外培养HK-2细胞外基质表达的影响,探讨NF-κB在糖尿病肾病(DN)肾小管间质纤维化中的作用。方法体外培养HK-2,予以正常糖(NG组)、高糖(HG组)培养液培养。在高糖培养后应用梭华-SofastTM转染NF-κB p65AS-ODN(ODNL、ODNH组)。免疫细胞化学检测细胞NF-κBp65蛋白的表达;ELISA检测细胞培养上清液Fn、ColⅢ浓度。结果 NG组HK-2细胞呈基础量地表达NF-κBp65蛋白;与NG组比较,HG组细胞NF-κBp65蛋白的表达显著增加,细胞上清液FN、ColⅢ蛋白浓度亦显著增加,差异有统计学意义(P<0.01);与HG组比较,ODNL及ODNH组细胞NF-κBp65蛋白的表达显著减弱,培养上清液FN、ColⅢ蛋白水平也显著降低,两者差异均有统计学意义(P<0.05或P<0.01)。结论 NF-κB反义寡核苷酸可抑制高糖诱导的HK-2细胞NF-κBp65、FN、ColⅢ的表达;通过抑制NF-κB的活化可能有助于DN肾脏纤维化的防治。     

逆转录病毒介导的反义c—myb对肝星状细胞增殖及I型胶原基因表达的影响

目的：探讨反义c—myb RNA对体外培养的肝星状细胞(HSC)增殖及I型胶原mRNA表达的影响。方法：构建含有反向c—myb基因片段的重组逆转录病毒载体pDOR—myb，将其导入包装细胞PA317中，收获含病毒的培养上清，进一步感染体外培养的大鼠HSC，采用四甲基偶氮唑盐(MTT)法测定细胞增殖反应，采用半定量RT—PCR检测c—myL、α1—I型胶原mRNA表达。结果：成功分离培养大鼠HSC，感染pDOR—myb病毒的HSC自身c—myb表达、细胞增殖及α—I型胶原mRNA表达显著受抑。结论：c—myb在HSC激活增殖过程中起重要作用，反义c—myb基因能抑制HSC增殖及I型胶原基因表达，这提示抑制c—myb表达可能是防治肝纤维化的有效途径。     

NF-κB的诱捕寡核苷酸抑制肺纤维细胞I型胶原mRNA表达的实验研究

目的 研究NF-κB的诱捕寡核苷酸(decoy-oligonucleotides, Decoy-ODNs)对小鼠肺原代成纤维细胞I型胶原形成的影响,为防治肺纤维化的发生提供理论基础.方法 设计合成针对NF-κB的Decoy-ODNs,用阳离子脂质体转染小鼠肺原代成纤维细胞,用凝胶迁移变动分析(electrophoretic mobility shift assay, EMSA)研究Decoy-ODNs对NF-κB的抑制作用,RT-PCR观察对成纤维细胞I型胶原合成的影响.结果 NF-κB的Decoy-ODNs可竞争抑制核转录因子NF-κB的活性,Decoy-ODNs作用18h后,成纤维细胞I型胶原mRNA的表达明显降低.结论 Decoy-ODNs可以通过拮抗核转录因子NF-κB的活性而抑制I型胶原纤维的表达,为防治肺纤维化的发生提供理论基础.     

核因子κB p65和p50在正常豚鼠耳蜗中的定位表达

目的:研究核因子κB(nuclear factor-kappa B,NF-κB)的亚单位p65和p50在正常豚鼠耳蜗中的定位与表达。方法:应用免疫组织化学SP法。结果:NF-κB p65免疫反应活性细胞位于螺旋韧带Ⅰ、Ⅲ、Ⅴ型纤维细胞和根细胞,而螺旋神经节、血管纹和螺旋器均未见染色;NF-κB p50免疫反应活性细胞位于耳蜗螺旋器的内、外毛细胞和支持细胞,此外,螺旋神经节、螺旋韧带和血管纹中也有p50表达,在耳蜗的上述部位中,NF-κB p50免疫染色多位于胞质内,胞核极少。结论:NF-κB p65和p50在正常豚鼠耳蜗的多种细胞中都有表达。     

肿瘤坏死因子-α对肝星状细胞增殖与凋亡的影响

目的:探讨肿瘤坏死因子-α(TNF-α)在肝纤维化发病中的作用。方法:采用TNF-α对体外培养的HSC进行干预, 通过流式细胞术、电镜及TUNEL等方法, 对HSC的增殖与凋亡进行研究。结果:①流式细胞术显示:TNF-α各组的G₀/G₁期细胞比率明显高于对照组, 而S期细胞比率明显低于对照组, 各组的细胞增殖指数均明显低于对照组;在凋亡方面, TNF-α各组的HSC凋亡率明显高于对照组, TNF-α各组HSC中抗凋亡基因bcl-2的表达明显低于对照组, 而促凋亡基因bax的表达明显高于对照组。②TUNEL分析显示:TNF-α(2.0μg/L)组的HSC凋亡率为18.7%±2.5%, 而对照组为5.3%±1.2%, 两者之间有显著差异。结论:TNF-α能够阻止HSC从G₀/G₁期进入S期, 从而具有抑制HSC增殖的作用;TNF-α能够降低HSC中bcl-2的表达、提高bax的表达, 这可能与其促进HSC凋亡有关。     

Wortmannin对离体肝星状细胞增殖的影响

目的观察Wortmannin对肝星状细胞增殖的影响,并探讨其作用的可能机制。方法用链酶蛋白酶和胶原酶原位灌流消化正常大鼠肝脏,Nycodenz密度梯度离心分离肝星状细胞,以流式细胞仪检测细胞周期,MTT比色法观察Wortman-nin对肝星状细胞增殖的影响。结果在20～60nmol/L浓度范围内,Wortmannin能剂量依赖性地抑制肝星状细胞增殖;可使G0/G1期细胞增多,S期细胞减少。结论Wortmannin可显著抑制肝星状细胞增殖,使肝星状细胞阻滞于G0/G1期,该作用可能是Wortmannin抗肝纤维化的机制之一。     

核因子-κB p65在宫颈癌中的表达及意义

目的探讨核因子-κB（NF—κB）p65在宫颈癌组织中表达的意义。方法应用免疫组织化学方法检测NF—κBp65在32例宫颈癌（研究组）及30例正常宫颈组织（对照组）中的表达情况。结果宫颈癌中NF—κBp65蛋白阳性表达率为68．7％．30例正常宫颈组织中NF—κB无阳性表达，两组间比较差异具有显著性意义（P〈0．05）。结论NF—κB活化在宫颈癌的发生发展中起重要作用。