DI-3-n-butylphthalide is used to treat mild and moderate acute ischemic stroke.However,the precise underlying mechanism requires further investigation.In this study,we investigated the molecular mechanism of DI-3-n-bu...DI-3-n-butylphthalide is used to treat mild and moderate acute ischemic stroke.However,the precise underlying mechanism requires further investigation.In this study,we investigated the molecular mechanism of DI-3-n-butylphthalide action by various means.We used hydrogen peroxide to induce injury to PC12cells and RAW264.7 cells to mimic neuronal oxidative stress injury in stroke in vitro and examined the effects of DI-3-n-butylphthalide.We found that DI-3-nbutylphthalide pretreatment markedly inhibited the reduction in viability and reactive oxygen species production in PC12 cells caused by hydrogen peroxide and inhibited cell apoptosis.Furthermore,DI-3-n-butylphthalide pretreatment inhibited the expression of the pro-apoptotic genes Bax and Bnip3.DI-3-nbutylphthalide also promoted ubiquitination and degradation of hypoxia inducible factor 1α,the key transcription factor that regulates Bax and Bnip3 genes.These findings suggest that DI-3-n-butylphthalide exhibits a neuroprotective effect on stroke by promoting hypoxia inducible factor-1α ubiquitination and degradation and inhibiting cell apoptosis.展开更多
目的研究通痹颗粒对胶原诱导性关节炎(collagen-induced arthritis,CIA)大鼠铁调素(hepcidin,Hepc)、Janus激酶(janus kinase,JAK)2/信号转导子和转录激活子(signal transduction and activator of transcription,STAT)3信号通路的影响...目的研究通痹颗粒对胶原诱导性关节炎(collagen-induced arthritis,CIA)大鼠铁调素(hepcidin,Hepc)、Janus激酶(janus kinase,JAK)2/信号转导子和转录激活子(signal transduction and activator of transcription,STAT)3信号通路的影响。方法选取36只雌性SD大鼠随机分成空白组、模型组、阳性对照组和通痹颗粒低、中、高剂量组,每组6只。空白组不予处理,其余组用牛Ⅱ型胶原建立CIA模型。造模完成后,空白组、模型组予生理盐水灌胃,其余各组分别以巴瑞替尼片和低、中、高剂量通痹颗粒灌胃。每天1次,连续4周。HE染色行滑膜组织病理学观察;酶联免疫吸附法测定血清Hepc、白细胞介素6(interleukin 6,IL-6)水平;逆转录-聚合酶链反应法测定滑膜中JAK2、STAT3、细胞信号因子传导抑制体(suppressor of cytokine signaling,SOCS)1、SOCS3的mRNA相对表达量;Western blot法检测滑膜中JAK2、p-JAK2、STAT3、p-STAT3、SOCS1、SOCS3的蛋白表达量。结果模型组见滑膜上皮结构缺损,滑膜重度增生,排列紊乱,并有大量炎症细胞浸润和多个血管翳形成;各给药组滑膜炎症均有所减轻,阳性对照组优于通痹颗粒高剂量组,通痹颗粒中、高剂量组优于低剂量组。与模型组相比,各给药组关节炎指数评分、血清Hepc和IL-6水平均显著降低(P<0.01);与阳性对照组相比,通痹颗粒中、低剂量组关节炎指数评分、血清Hepc和IL-6水平均升高(P<0.05)。与模型组比较,阳性对照组和通痹颗粒低、中、高剂量组JAK2、STAT3 mRNA和蛋白以及p-JAK2、p-STAT3的蛋白表达量均降低(P<0.05),而通路抑制因子SOCS1、SOCS3 mRNA和蛋白的表达均升高(P<0.05);与阳性对照组比较,通痹颗粒各剂量组JAK2、STAT3 mRNA和蛋白以及p-JAK2、p-STAT3的蛋白表达量均升高(P<0.05),而SOCS1、SOCS3 mRNA和蛋白的表达均降低(P<0.05)。结论通痹颗粒能够改善CIA大鼠滑膜炎症,其机制可能与抑制JAK2/STAT3信号通路而减少Hepc的表达有关。展开更多
目的研究血管内皮生长因子（vascular endothelial growth factor，VEGF），信号传导与转录激活因子3（signal transducer and activator of transcription3，Stat3）和低氧诱导因子HIF-1α（hypoxia-induciblefactor-1α，HIF-...目的研究血管内皮生长因子（vascular endothelial growth factor，VEGF），信号传导与转录激活因子3（signal transducer and activator of transcription3，Stat3）和低氧诱导因子HIF-1α（hypoxia-induciblefactor-1α，HIF-1α）在肾母细胞瘤（Wilms’tumor，WT）中的表达及其临床意义。方法应用免疫组化SABC法辅以计算机图像分析的方法，研究Stat3，HIF-1α与VEGF在52例WT组织，47例瘤旁组织及8例正常肾组织表达强度情况。结果VEGF，Stat3及HIF-1α在WT组织中表达强度较瘤旁组织及正常肾组织显著增强（P〈0．05），且瘤旁组织中VEGF表达强度高于正常肾组织。另外，临床分期Ⅲ～Ⅳ和预后不良病理类型的WT中Stat3及VEGF表达强度明显高于临床分期Ⅰ～Ⅱ的WT，预后不良病理类型及直径≥6cm的WT中HIF-1α表达强度较预后良好型及直径〈6cm的WT升高。结论VEGF，Stat3及HIF-1α表达与肾母细胞瘤的发展预后有关，参与了肿瘤血管的生成及肿瘤的增殖侵袭，Stat3可能对HIF-1和VEGF的表达起着重要的调控作用，对于靶向治疗肾母细胞瘤具有一定意义。展开更多
OBJECTIVE:To observe the intervention of Chushizi(Fructus Broussonetiae)(CSZ)on drug-induced liver injury(DILI)in rats,as well as indicators of liver function,serum levels of inflammatory cytokines,and expression of p...OBJECTIVE:To observe the intervention of Chushizi(Fructus Broussonetiae)(CSZ)on drug-induced liver injury(DILI)in rats,as well as indicators of liver function,serum levels of inflammatory cytokines,and expression of proteins and m RNA associated with toll-like receptor 3(TLR3)and the signal transducer and activator of transcription 3(STAT3)pathway in the liver[TLR3,janus protein tyrosine kinase 2(JAK2),c-jun,c-fos,c-Jun N-terminal kinase 2(JNK2),and STAT3].METHODS:Forty specified pathogen free grade Sprague-Dawley rats were randomly divided into the control group,the model group,the silybin group and the CSZ group.Rats were given acetaminophen(APAP)to trigger DILI.Histopathology of the liver was observed by hematoxylin-eosin staining.The levels of alanine aminotransferase(ALT),aspartate transaminase(AST),direct bilirubin(DBIL),and total bilirubin(TBIL)in serum were detected by a semi-automatic biochemical instrument.Content of tumor necrosis factor alpha(TNF-α),interleukin(IL)-6,IL-13,and IL-22 in serum were detected by the enzyme-linked immunosorbent assay,the expression of TLR3,phosphorylation of JAK2(p-JAK2),while c-jun and c-fos proteins in the liver were determined by immunohistochemistry;expression of JNK2,and STAT3 in the liver were assayed by Western blot and real-time quantitative polymerase chain reaction.P-JNK2 and p-STAT3 in the liver were assayed by Western blot.RESULTS:After treatment,the activity of ALT,AST,and concentrations of TBIL,DBIL,TNF-α,IL-6,as well as IL-13 in serum,were lower than those in the model group,and expression of p-JAK2,TLR3,c-jun,c-fos,p-STAT3,and p-JNK2 could be downregulated.CONCLUSION:Our findings suggest that CSZ is a valid medicine to alleviate APAP-induced DILI,while its partial mechanism may regulate the TLR3/JNK/c-jun/c-fos/JAK/STAT3 pathway.展开更多
文摘DI-3-n-butylphthalide is used to treat mild and moderate acute ischemic stroke.However,the precise underlying mechanism requires further investigation.In this study,we investigated the molecular mechanism of DI-3-n-butylphthalide action by various means.We used hydrogen peroxide to induce injury to PC12cells and RAW264.7 cells to mimic neuronal oxidative stress injury in stroke in vitro and examined the effects of DI-3-n-butylphthalide.We found that DI-3-nbutylphthalide pretreatment markedly inhibited the reduction in viability and reactive oxygen species production in PC12 cells caused by hydrogen peroxide and inhibited cell apoptosis.Furthermore,DI-3-n-butylphthalide pretreatment inhibited the expression of the pro-apoptotic genes Bax and Bnip3.DI-3-nbutylphthalide also promoted ubiquitination and degradation of hypoxia inducible factor 1α,the key transcription factor that regulates Bax and Bnip3 genes.These findings suggest that DI-3-n-butylphthalide exhibits a neuroprotective effect on stroke by promoting hypoxia inducible factor-1α ubiquitination and degradation and inhibiting cell apoptosis.
文摘目的研究血管内皮生长因子（vascular endothelial growth factor，VEGF），信号传导与转录激活因子3（signal transducer and activator of transcription3，Stat3）和低氧诱导因子HIF-1α（hypoxia-induciblefactor-1α，HIF-1α）在肾母细胞瘤（Wilms’tumor，WT）中的表达及其临床意义。方法应用免疫组化SABC法辅以计算机图像分析的方法，研究Stat3，HIF-1α与VEGF在52例WT组织，47例瘤旁组织及8例正常肾组织表达强度情况。结果VEGF，Stat3及HIF-1α在WT组织中表达强度较瘤旁组织及正常肾组织显著增强（P〈0．05），且瘤旁组织中VEGF表达强度高于正常肾组织。另外，临床分期Ⅲ～Ⅳ和预后不良病理类型的WT中Stat3及VEGF表达强度明显高于临床分期Ⅰ～Ⅱ的WT，预后不良病理类型及直径≥6cm的WT中HIF-1α表达强度较预后良好型及直径〈6cm的WT升高。结论VEGF，Stat3及HIF-1α表达与肾母细胞瘤的发展预后有关，参与了肿瘤血管的生成及肿瘤的增殖侵袭，Stat3可能对HIF-1和VEGF的表达起着重要的调控作用，对于靶向治疗肾母细胞瘤具有一定意义。
文摘目的研究转录活化因子3(Stat3)、肿瘤转移相关蛋白1(metastasis-associated genes 1,MTA1)、低氧诱导因子-1α(hypoxia inducible factor1α,HIF1α)在银屑病患者中的表达及意义。方法本文选取2017年1月-2019年1月在我院皮肤科就诊的70例寻常型银屑病患者标本,同时选取正常皮肤组织标本70例。采用严重程度指数(Psoriasis area and severity index,PASI)评分评估患者疾病严重程度,免疫组化染色后进行结果判定。结果银屑病组织中Stat3、HIF1α阳性表达率高于正常皮肤组织,MTA1阳性表达率低于正常皮肤组织(P<0.05)。点滴型、斑块型患者Stat3、MTA1、HIF1α阳性表达比较,无统计学差异(P>0.05)。进展期患者Stat3、HIF1α阳性表达率高于稳定期患者,MTA1阳性表达率低于稳定期患者,具有统计学差异(P<0.05)。重度患者Stat3、HIF1α阳性表达率高于中度患者,MTA1阳性表达率低于中度患者(P<0.05);中度患者Stat3、HIF1α阳性表达率高于轻度患者,MTA1阳性表达率低于轻度患者,具有统计学差异(P<0.05)。结论 Stat3、MTA1、HIF1α在银屑病患者中表达异常,其中Stat3、HIF1α表达较高,MTA1表达低,与银屑病患者临床分期、病情严重程度有关,参与银屑病发病,发挥协同作用。
基金Supported by the National Natural Science Foundation of China(Study on the Compatibility Relationship and Mechanism of Vinegar Kansui and Roasted Licorice Based on the Theory of Medicine Syndrome,No.81503268)the Top Program of Science and Technology Research Youth in Colleges and Universities of Hebei Province(Study on the Preventive and Therapeutic Effect and Mechanism of Jiedu Hugan Recipe on Drug-Induced Liver Injury,No.BJ2016038)+1 种基金the Central Finance Public Health Project 2017the General Survey of Traditional Chinese Medicine Resources(No.Z135080000022)。
文摘OBJECTIVE:To observe the intervention of Chushizi(Fructus Broussonetiae)(CSZ)on drug-induced liver injury(DILI)in rats,as well as indicators of liver function,serum levels of inflammatory cytokines,and expression of proteins and m RNA associated with toll-like receptor 3(TLR3)and the signal transducer and activator of transcription 3(STAT3)pathway in the liver[TLR3,janus protein tyrosine kinase 2(JAK2),c-jun,c-fos,c-Jun N-terminal kinase 2(JNK2),and STAT3].METHODS:Forty specified pathogen free grade Sprague-Dawley rats were randomly divided into the control group,the model group,the silybin group and the CSZ group.Rats were given acetaminophen(APAP)to trigger DILI.Histopathology of the liver was observed by hematoxylin-eosin staining.The levels of alanine aminotransferase(ALT),aspartate transaminase(AST),direct bilirubin(DBIL),and total bilirubin(TBIL)in serum were detected by a semi-automatic biochemical instrument.Content of tumor necrosis factor alpha(TNF-α),interleukin(IL)-6,IL-13,and IL-22 in serum were detected by the enzyme-linked immunosorbent assay,the expression of TLR3,phosphorylation of JAK2(p-JAK2),while c-jun and c-fos proteins in the liver were determined by immunohistochemistry;expression of JNK2,and STAT3 in the liver were assayed by Western blot and real-time quantitative polymerase chain reaction.P-JNK2 and p-STAT3 in the liver were assayed by Western blot.RESULTS:After treatment,the activity of ALT,AST,and concentrations of TBIL,DBIL,TNF-α,IL-6,as well as IL-13 in serum,were lower than those in the model group,and expression of p-JAK2,TLR3,c-jun,c-fos,p-STAT3,and p-JNK2 could be downregulated.CONCLUSION:Our findings suggest that CSZ is a valid medicine to alleviate APAP-induced DILI,while its partial mechanism may regulate the TLR3/JNK/c-jun/c-fos/JAK/STAT3 pathway.
