Potassium-calcium activates channel subfamily N member 3(KCNN3/SK3/KCa2.3)is involved in regulating cellular calcium signaling,muscle contraction and neurotransmitter release.Dysregulation of the KCNN3 channel is asso...Potassium-calcium activates channel subfamily N member 3(KCNN3/SK3/KCa2.3)is involved in regulating cellular calcium signaling,muscle contraction and neurotransmitter release.Dysregulation of the KCNN3 channel is associated with the development of various tumors.We use bioinformatics analysis to identify whether KCNN3 regulates the occurrence and development of stomach adenocarcinoma(STAD)as a prognostic target.By analyzing the Human Protein Atlas(HPA)database and The Cancer Genome Atlas(TCGA)database,we found that the protein and mRNA levels of KCNN3 were dramatically reduced in STAD,and TCGA database showed that KCNN3 significantly correlated with the prognosis and clinical features of STAD.In addition,we found that high expression of KCNN3 in STAD reduced the IC 50 of several drugs in STAD cells,suggesting that high expression of KCNN3 correlated with the drug sensitivity of STAD.To investigate the underlying biological mechanism,we identified a potential KCNN3 interaction factor,tumor necrosis factor receptor superfamily member 7(CD27/TNFRSF7),which is expressed at low levels in STAD.RT-qPCR and Western blotting confirmed that KCNN3 and CD27 positively correlated with each other at protein and mRNA levels,and co-immunoprecipitation and immunofluorescence experiments confirmed that the two proteins interact and colocalize in the cytoplasm.Moreover,we confirmed the inhibitory effect of KCNN3 on the proliferation,migration and invasion of human STAD cells in vitro and in vivo through subcutaneous tumorigenesis and cellular experiments.Furthermore,GO/KEGG enrichment analysis showed that KCNN3 was enriched in signaling pathways regulating the immune response and calcium or metal ion transport.Lastly,we verified through cell co-culture,RT-qPCR and CCK8 assays that high expression of KCNN3 can promote the increase of T cell activating factor and the killing effect of T cells on STAD cells.Therefore,our results suggest that KCNN3 is a potential inhibitory factor affecting the occurrence and progression of STAD.展开更多
目的研究马尔尼菲青霉对巨噬细胞模式识别受体TLR-2、TLR-4、Dectin-1的表达及促炎因子TNF-α分泌的影响。方法马尔尼菲青霉酵母相菌液与小鼠腹腔巨噬细胞共培养24h,采用流式细胞技术检测巨噬细胞TLR-2、TLR-4及Dectin-1的平均荧光强度...目的研究马尔尼菲青霉对巨噬细胞模式识别受体TLR-2、TLR-4、Dectin-1的表达及促炎因子TNF-α分泌的影响。方法马尔尼菲青霉酵母相菌液与小鼠腹腔巨噬细胞共培养24h,采用流式细胞技术检测巨噬细胞TLR-2、TLR-4及Dectin-1的平均荧光强度;共聚焦显微镜观察荧光染色的受体;ELISA法测定培养液上清中TNF-α的浓度;Real time PCR检测不同时间段TNF-α的mRNA表达。结果马尔尼菲青霉可使巨噬细胞TLR-2、TLR-4、Dectin-1的平均荧光强度均增高,并激活巨噬细胞产生TNF-α。结论马尔尼菲青霉上调了巨噬细胞模式识别受体TLR-2、TLR-4及Dectin-1的表达,巨噬细胞的激活与TLR-2、TLR-4及Dectin-1的表达上调相关。展开更多
目的:研究脊髓肿瘤坏死因子α(tumor necrosis factor-α,TNF-α)在持续性术后痛中的作用及与Toll样受体4(TLR4)/p38有丝分裂原活化蛋白激酶(p38MAPK)级联的关系。方法:选择鞘内置管成功的雄性SD大鼠120只,采用随机数字表法随机分为5组...目的:研究脊髓肿瘤坏死因子α(tumor necrosis factor-α,TNF-α)在持续性术后痛中的作用及与Toll样受体4(TLR4)/p38有丝分裂原活化蛋白激酶(p38MAPK)级联的关系。方法:选择鞘内置管成功的雄性SD大鼠120只,采用随机数字表法随机分为5组(每组24只):假手术组、持续性术后痛组、Toll样受体4小干扰RNA组(TLR4 si RNA组)、4-(4-氟苯基)-2-(4-甲磺酰基苯基)-5-(4-吡啶基)咪唑组(SB203580组)和重组人Ⅱ型肿瘤坏死因子组(rh TNFR-Fc组)。按Flatters介绍的方法建立大鼠皮肤肌肉切口牵拉(skin/muscle incision and retraction,SMIR)持续性术后痛模型;在术前1天及术后第1、3、7、12和22天时测定大鼠机械缩足反应阈值(mechanical withdrawal threshold,MWT);按ELISA法测定脊髓TNF-α含量。结果:与术前基础值及假手术组比较,持续性术后痛组大鼠在术后第3、7、12和22天MWT明显降低(P<0.05),脊髓TNF-α含量在术后7、12和22天明显升高(P<0.05);与持续性术后痛组比较,TLR4 si RNA组和SB203580组大鼠在术后第3、7和12天,rh TNFR-Fc组在术后第7和12天MWT明显升高(P<0.05),TLR4 si RNA组、SB203580组和rh TNFR-Fc组大鼠脊髓TNF-α含量在术后第7、12和22天明显降低(P<0.05)。结论:脊髓TNF-α参与了大鼠SMIR持续性术后痛的形成,其增加与脊髓TLR4/p38MAPK级联的活化有关。展开更多
文摘Potassium-calcium activates channel subfamily N member 3(KCNN3/SK3/KCa2.3)is involved in regulating cellular calcium signaling,muscle contraction and neurotransmitter release.Dysregulation of the KCNN3 channel is associated with the development of various tumors.We use bioinformatics analysis to identify whether KCNN3 regulates the occurrence and development of stomach adenocarcinoma(STAD)as a prognostic target.By analyzing the Human Protein Atlas(HPA)database and The Cancer Genome Atlas(TCGA)database,we found that the protein and mRNA levels of KCNN3 were dramatically reduced in STAD,and TCGA database showed that KCNN3 significantly correlated with the prognosis and clinical features of STAD.In addition,we found that high expression of KCNN3 in STAD reduced the IC 50 of several drugs in STAD cells,suggesting that high expression of KCNN3 correlated with the drug sensitivity of STAD.To investigate the underlying biological mechanism,we identified a potential KCNN3 interaction factor,tumor necrosis factor receptor superfamily member 7(CD27/TNFRSF7),which is expressed at low levels in STAD.RT-qPCR and Western blotting confirmed that KCNN3 and CD27 positively correlated with each other at protein and mRNA levels,and co-immunoprecipitation and immunofluorescence experiments confirmed that the two proteins interact and colocalize in the cytoplasm.Moreover,we confirmed the inhibitory effect of KCNN3 on the proliferation,migration and invasion of human STAD cells in vitro and in vivo through subcutaneous tumorigenesis and cellular experiments.Furthermore,GO/KEGG enrichment analysis showed that KCNN3 was enriched in signaling pathways regulating the immune response and calcium or metal ion transport.Lastly,we verified through cell co-culture,RT-qPCR and CCK8 assays that high expression of KCNN3 can promote the increase of T cell activating factor and the killing effect of T cells on STAD cells.Therefore,our results suggest that KCNN3 is a potential inhibitory factor affecting the occurrence and progression of STAD.
文摘目的研究马尔尼菲青霉对巨噬细胞模式识别受体TLR-2、TLR-4、Dectin-1的表达及促炎因子TNF-α分泌的影响。方法马尔尼菲青霉酵母相菌液与小鼠腹腔巨噬细胞共培养24h,采用流式细胞技术检测巨噬细胞TLR-2、TLR-4及Dectin-1的平均荧光强度;共聚焦显微镜观察荧光染色的受体;ELISA法测定培养液上清中TNF-α的浓度;Real time PCR检测不同时间段TNF-α的mRNA表达。结果马尔尼菲青霉可使巨噬细胞TLR-2、TLR-4、Dectin-1的平均荧光强度均增高,并激活巨噬细胞产生TNF-α。结论马尔尼菲青霉上调了巨噬细胞模式识别受体TLR-2、TLR-4及Dectin-1的表达,巨噬细胞的激活与TLR-2、TLR-4及Dectin-1的表达上调相关。
文摘目的探讨C1q和肿瘤坏死因子相关蛋白4(CTRP4)对子痫前期大鼠胎盘滋养层细胞的影响。方法构建子痫前期大鼠模型,采集正常孕鼠和模型大鼠胎盘滋养层组织,运用实时定量PCR和Western blot法检测CTRP4、白细胞介素1β(IL-1β)和caspase-1 mRNA和蛋白表达水平;分离培养正常孕鼠和模型鼠滋养层细胞,在不同时间点,运用流式细胞术检测碘化丙啶和caspase-1双阳性(PI+caspase-1+)细胞(pyroptosis),运用实时定量PCR和Western blot法检测IL-1β和caspase-1表达水平;在模型大鼠滋养层细胞培养基中分别加入(0.5、5、15、25、50)ng/m L CTRP4重组蛋白或(10、20)ng/m L CTRP4蛋白中和抗体,处理72 h后检测pyroptosis细胞数目和caspase-1、IL-1β水平。结果子痫前期大鼠胎盘滋养层组织caspase-1、IL-1β表达增强,CTRP4表达水平下调;CTRP4重组蛋白处理体外培养的大鼠滋养层细胞可显著减少PI+caspase-1+细胞数量并降低caspase-1、IL-1β水平,而CTRP4蛋白中和抗体处理显著增加PI+caspase-1+细胞数量并增强炎症反应。结论 CTRP4可显著抑制caspase-1/IL-1β炎症调节通路的活性,并抑制子娴前期大鼠胎盘滋养层细胞的pyroptosis。
文摘目的:研究脊髓肿瘤坏死因子α(tumor necrosis factor-α,TNF-α)在持续性术后痛中的作用及与Toll样受体4(TLR4)/p38有丝分裂原活化蛋白激酶(p38MAPK)级联的关系。方法:选择鞘内置管成功的雄性SD大鼠120只,采用随机数字表法随机分为5组(每组24只):假手术组、持续性术后痛组、Toll样受体4小干扰RNA组(TLR4 si RNA组)、4-(4-氟苯基)-2-(4-甲磺酰基苯基)-5-(4-吡啶基)咪唑组(SB203580组)和重组人Ⅱ型肿瘤坏死因子组(rh TNFR-Fc组)。按Flatters介绍的方法建立大鼠皮肤肌肉切口牵拉(skin/muscle incision and retraction,SMIR)持续性术后痛模型;在术前1天及术后第1、3、7、12和22天时测定大鼠机械缩足反应阈值(mechanical withdrawal threshold,MWT);按ELISA法测定脊髓TNF-α含量。结果:与术前基础值及假手术组比较,持续性术后痛组大鼠在术后第3、7、12和22天MWT明显降低(P<0.05),脊髓TNF-α含量在术后7、12和22天明显升高(P<0.05);与持续性术后痛组比较,TLR4 si RNA组和SB203580组大鼠在术后第3、7和12天,rh TNFR-Fc组在术后第7和12天MWT明显升高(P<0.05),TLR4 si RNA组、SB203580组和rh TNFR-Fc组大鼠脊髓TNF-α含量在术后第7、12和22天明显降低(P<0.05)。结论:脊髓TNF-α参与了大鼠SMIR持续性术后痛的形成,其增加与脊髓TLR4/p38MAPK级联的活化有关。
