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Overexpression of mitogen-activated protein kinase phosphatase-1 in endothelial cells reduces blood-brain barrier injury in a mouse model of ischemic stroke 被引量:2
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作者 Xiu-De Qin Tai-Qin Yang +6 位作者 Jing-Hui Zeng Hao-Bin Cai Shao-Hua Qi Jian-Jun Jiang Ying Cheng Long-Sheng Xu Fan Bu 《Neural Regeneration Research》 SCIE CAS CSCD 2023年第8期1743-1749,共7页
Ischemic stroke can cause blood-brain barrier(BBB)injury,which worsens brain damage induced by stroke.Abnormal expression of tight junction proteins in endothelial cells(ECs)can increase intracellular space and BBB le... Ischemic stroke can cause blood-brain barrier(BBB)injury,which worsens brain damage induced by stroke.Abnormal expression of tight junction proteins in endothelial cells(ECs)can increase intracellular space and BBB leakage.Selective inhibition of mitogen-activated protein kinase,the negative regulatory substrate of mitogen-activated protein kinase phosphatase(MKP)-1,improves tight junction protein function in ECs,and genetic deletion of MKP-1 aggravates ischemic brain injury.However,whether the latter affects BBB integrity,and the cell type-specific mechanism underlying this process,remain unclear.In this study,we established an adult male mouse model of ischemic stroke by occluding the middle cerebral artery for 60 minutes and overexpressed MKP-1 in ECs on the injured side via lentiviral transfection before stroke.We found that overexpression of MKP-1 in ECs reduced infarct volume,reduced the level of inflammatory factors interleukin-1β,interleukin-6,and chemokine C-C motif ligand-2,inhibited vascular injury,and promoted the recovery of sensorimotor and memory/cognitive function.Overexpression of MKP-1 in ECs also inhibited the activation of cerebral ischemia-induced extracellular signal-regulated kinase(ERK)1/2 and the downregulation of occludin expression.Finally,to investigate the mechanism by which MKP-1 exerted these functions in ECs,we established an ischemic stroke model in vitro by depriving the primary endothelial cell of oxygen and glucose,and pharmacologically inhibited the activity of MKP-1 and ERK1/2.Our findings suggest that MKP-1 inhibition aggravates oxygen and glucose deprivation-induced cell death,cell monolayer leakage,and downregulation of occludin expression,and that inhibiting ERK1/2 can reverse these effects.In addition,co-inhibition of MKP-1 and ERK1/2 exhibited similar effects to inhibition of ERK1/2.These findings suggest that overexpression of MKP-1 in ECs can prevent ischemia-induced occludin downregulation and cell death via deactivating ERK1/2,thereby protecting the integrity of BBB,alleviating brain injury,and improving post-stroke prognosis. 展开更多
关键词 blood-brain barrier brain injury cerebral ischemia endothelial cells extracellular signal-regulated kinase 1/2 functional recovery mitogenactivated protein kinase phosphatase 1 OCCLUDIN oxygen and glucose deprivation transient middle cerebral artery occlusion
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Involvement of ERK1/2 and p38 MAPK in up-regulation of 14-3-3 protein induced by hydrogen peroxide preconditioning in PC12 cells
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作者 苏庆杰 陈小武 +1 位作者 陈志斌 孙圣刚 《Neuroscience Bulletin》 SCIE CAS CSCD 2008年第4期244-250,共7页
Objective To investigate the protective effects of hydrogen peroxide preconditioning (HPP) on the pheochromocytoma (PC12) cells treated with 1-methyl-4-phenylpyridinium (MPP^+) and to explore the potential mech... Objective To investigate the protective effects of hydrogen peroxide preconditioning (HPP) on the pheochromocytoma (PC12) cells treated with 1-methyl-4-phenylpyridinium (MPP^+) and to explore the potential mechanisms. Methods The viability and apoptosis of PC 12 cells were determinded by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay and 4′,6′-diamidino-2-phenylindole (DAPI) staining, respectively. The expressions of 14-3-3 protein and phospholylated p38 mitogen-activated protein kinase (MAPK) were determined by Western blot. Enzyme-linked immunosorbent assay (ELISA) was used to measure the activity of extracellular signal-regulated protein kinase 1/2 (ERK1/2). Results The cell viability decreased and the number of apoptotic cells increased dramatically in MPP^+ group compared with that in Control group. HPP induced a significant increase in cell viability and a marked decrease in population of apoptotic cells of the MPP^+- treated PC 12 cells, accompanied with up-regulation of 14-3-3 protein and increase of ERK 1/2 and p38 MAPK activities. The 14-3-3 protein expression was positively correlated with the phosphorylation of ERK1/2. Furthermore, inhibition of the ERK1/2 with PD98059 abolished the 14-3-3 protein up-regulation in PC 12 cells induced by HPP. Conclusion HPP protects PC 12 cells against MPP+ toxicity by up-regulating 14-3-3 protein expression through the ERK1/2 and p38 MAPK signaling pathways. 展开更多
关键词 hydrogen peroxide preconditioning 14-3-3 protein erk1/2 p38 mitogen-activated protein kinase PC12 cell
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Involvement of MAPK/ERK kinase-ERK pathway in exogenous bFGF-induced Egr-1 binding activity enhancement in anoxia-reoxygenation injured astrocytes
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作者 刘颖 陆锦标 +1 位作者 陈琦 叶诸榕 《Neuroscience Bulletin》 SCIE CAS CSCD 2007年第4期221-228,共8页
Objective Intravenous administration of basic fibroblast growth factor (bFGF) is effective to reduce the volume of cerebral infract due to ischemia. This study was designed to investigate the molecular mechanism, es... Objective Intravenous administration of basic fibroblast growth factor (bFGF) is effective to reduce the volume of cerebral infract due to ischemia. This study was designed to investigate the molecular mechanism, especially the signal transduction pathways, involved in this protective role of bFGF. Methods Anoxia-reoxygenation treated atrocytes were used to study the role of mitogen-activated protein kinase/extracellular signal-regulated kinase kinase (MAPK/ERK kinase, MEK)-ERK signaling pathway after exogenous bFGF administration by Western blot. Electrophoretic mobile shift assay was used to detect the binding activity of early growth response factor-1 (Egr-1), an important transcription factor for endogenous bFGF. Results bFGF could protect some signal transduction proteins from the oxygen-derived free radicals induced degradation. ERK1/2 was activated and involved in Egr-1 binding activity enhancement induced by exogenous bFGF. Conclusion MEK-ERK MAPK cascade may be an important signal transduction pathway contributed to bFGF induced enhancement of Egr-1 binding activity in anoxia-reoxygenation injured astrocytes. 展开更多
关键词 extracellular signal-regulated kinase mitogen-activated protein kinase free radicals fibroblast growth factor 2 early growth response protein 1 ASTROCYTE
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莱菔硫烷抑制HepG-2细胞MMP-9的活性以及ERK1/2磷酸化
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作者 刘伟 刘建平 +2 位作者 冯秀芝 陈锐 丁年良 《中华中医药学刊》 CAS 2011年第6期1374-1377,共4页
目的:探讨莱菔硫烷(su lforaphane,SFN)对肝癌细胞系HepG-2细胞基质金属蛋白酶(m atrix m etallo-prote inase,MMP)-9的活性及对细胞外信号调节激酶(extracelluar signal-regu lated k inase,ERK)1/2磷酸化的影响。方法:体外培... 目的:探讨莱菔硫烷(su lforaphane,SFN)对肝癌细胞系HepG-2细胞基质金属蛋白酶(m atrix m etallo-prote inase,MMP)-9的活性及对细胞外信号调节激酶(extracelluar signal-regu lated k inase,ERK)1/2磷酸化的影响。方法:体外培养HepG-2细胞,用SFN预处理后,四氮唑盐酶还原法检测细胞的增殖情况,以及LDH的漏出率;明胶酶谱实验和实时荧光定量PCR检测MMP-9的酶活性和mRNA表达水平;W estern b lot检测ERK1/2的磷酸化情况;最后采用定量实时PCR法检测SFN对HepG-2细胞表达Raf激酶抑制蛋白(Raf k inase inh ib itorprote in,RK IP),Spred-1和Spred-2 mRNA的影响。结果:0,20,40,50μM SFN处理24~72h后,均能抑制HepG-2的生长,LHD漏出率实验显示SFN对细胞无明显的毒性;SFN能明显抑制MMP-9的活性和mRNA的表达水平,同时能抑制ERK1/2的磷酸化。另外,SFN能明显提高RK IP、Spred-1和Spred-2 mRNA的表达水平。结论:SFN对HepG-2细胞生长以及MMP-9的活性具有抑制作用,它可能通过抑制ERK1/2磷酸化,诱导RK IP,Spred-1和Spred-2表达而发挥抗肿瘤的作用。 展开更多
关键词 莱菔硫烷 肝细胞癌 基质金属蛋白酶-9 细胞外信号调节激酶1/2
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细胞外信号调节激酶1/2在Aβ_(25-35)引起体外培养星形胶质细胞炎症反应中的作用
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作者 胡炜 闫恩志 +1 位作者 范莹 金英 《辽宁医学院学报》 CAS 2007年第3期7-10,共4页
目的观察Aβ诱导星形胶质细胞激活炎症细胞因子表达及细胞外信号调节激酶1/2的表达。探讨细胞外信号调节激酶1/2是否参与了星形胶质细胞激活炎症细胞因子作用及其作用机制。方法传代体外培养的大鼠星形胶质细胞,分别用终浓度为10μmol/L... 目的观察Aβ诱导星形胶质细胞激活炎症细胞因子表达及细胞外信号调节激酶1/2的表达。探讨细胞外信号调节激酶1/2是否参与了星形胶质细胞激活炎症细胞因子作用及其作用机制。方法传代体外培养的大鼠星形胶质细胞,分别用终浓度为10μmol/L和20μmol/L的Aβ25-35作用30分钟。在PD98059组,加入Aβ25-3520μmol/L前1小时,加入PD培养。用Western blot分析iNOS、COX-2、IL-1β、P-ERK1/2的改变。结果Aβ25-35可使体外培养星形胶质细胞P-ERK1/2蛋白表达明显增加,同时,Aβ25-35也可使iNOS、COX-2、IL-1β表达明显增加,ERK1/2上游激酶MEK特异性阻滞剂PD98059可完全阻断Aβ25-35引起的ERK1/2表达增加,也可抑制Aβ25-35引起的iNOS、COX-2、IL-1β蛋白表达增加。结论ERK1/2信号转导通路参与Aβ25-35引起体外培养星形胶质细胞炎症反应的作用。 展开更多
关键词 Β淀粉样蛋白25-35 可诱导型一氧化氮合酶 环氧合酶2 白细胞介素1 细胞外信号调节激酶1/2
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Glucocorticoid modulation of extracellular signal-regulated protein kinase 1/2 and p38 in human ovarian cancer HO-8910 cells 被引量:4
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作者 夏冰 卢建 王钢 《Chinese Medical Journal》 SCIE CAS CSCD 2003年第5期753-756,共4页
Objective To investigate the signaling pathway through testing the effects of dexamethasone (Dex) on the activation of the extracellular signal-regulated protein kinase 1/2 (ERK1/2) and p38 kinase (p38) in HO-8910... Objective To investigate the signaling pathway through testing the effects of dexamethasone (Dex) on the activation of the extracellular signal-regulated protein kinase 1/2 (ERK1/2) and p38 kinase (p38) in HO-8910 cells.Methods Activation of the ERK1/2 and p38 was detected by Western blotting using the antibodies against the total ERK1/2 and p38 mitogen-activated protein kinases (MAPKs) protein and the phosphorylated forms of them. Results Dex could suppress the activation of ERK1/2, while enhance the activation of p38 rapidly and strongly in a dose- and time- dependent manner. Neither effect could be blocked by RU486, the antagonist of glucocorticoid receptor (GR).Conclusion Dex has rapid effects on the activation of ERK1/2 and p38, and these effects are not mediated by GR. 展开更多
关键词 DEXAMETHASONE extracellular signal-regulated protein kinase 1/2 P38 HO-8910 cell line
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整合素α5β1介导细胞外信号调节激酶信号转导通路对A549细胞生长和侵袭的影响 被引量:2
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作者 白晶 钟小宁 +3 位作者 唐海娟 何志义 张建全 邓静敏 《中国肺癌杂志》 CAS 2011年第7期568-574,共7页
背景与目的近年研究显示整合素α5β1作为整合素家族的重要部分与非小细胞肺癌的转移性、浸润性和低分化趋向密切相关。本研究应用整合素α5/β1 siRNA双链及ERK抑制剂PD98095干预人肺癌细胞A549,探讨整合素α5β1蛋白表达对A549细胞生... 背景与目的近年研究显示整合素α5β1作为整合素家族的重要部分与非小细胞肺癌的转移性、浸润性和低分化趋向密切相关。本研究应用整合素α5/β1 siRNA双链及ERK抑制剂PD98095干预人肺癌细胞A549,探讨整合素α5β1蛋白表达对A549细胞生长和迁移能力的影响及其细胞内信号转导机制。方法实验分为未转染组、脂质体组、整合素α5β1 siRNA转染组和PD98095组四组。采用免疫印迹(Western blot)和逆转录-聚合酶链反应(RT-PCR)检测A549中整合素α5β1蛋白和mRNA表达水平,Western blot检测A549中ERK1/2、MMP-9和caspase-3蛋白水平,四甲基偶氮唑盐比色(M)法和Annexin-V FITC PI双染色法检测A549增殖和凋亡。结果整合素α5/β1 siRNA双链在抑制α5/β1蛋白和mRNA表达的同时,可以下调ERK的mRNA和蛋白表达,并抑制其磷酸化水平。整合素α5/β1 siRNA双链和PD98059均可以明显抑制A549细胞的增殖,促进细胞凋亡和细胞内caspase-3蛋白表达,并抑制细胞内MMP-9蛋白表达。结论整合素α5β1可能通过介导的ERK信号转导通路参与了A549细胞的增殖和迁移调控。 展开更多
关键词 整合素 A549细胞 erk1/2(细胞外信号调节激酶1/2)
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碘缺乏和甲状腺功能减退对大鼠仔鼠海马ERK1/2表达的影响
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作者 刘万洋 王毅 +2 位作者 董静 魏薇 陈杰 《卫生研究》 CAS CSCD 北大核心 2010年第3期295-298,共4页
目的观察碘缺乏和甲状腺功能减退对大鼠仔鼠海马细胞外信号调节蛋白激酶1及2(ERK1/2)表达的影响。方法健康2月龄孕Wistar大鼠28只,按体重随机分成对照组、甲状腺功能减退组[按饮水中含丙基硫尿嘧啶(PTU)剂量分为5mg/L组和15mg/L组]和碘... 目的观察碘缺乏和甲状腺功能减退对大鼠仔鼠海马细胞外信号调节蛋白激酶1及2(ERK1/2)表达的影响。方法健康2月龄孕Wistar大鼠28只,按体重随机分成对照组、甲状腺功能减退组[按饮水中含丙基硫尿嘧啶(PTU)剂量分为5mg/L组和15mg/L组]和碘缺乏组,每组7只。分别于出生后第7、14、21、28和42天每组随机取5只仔鼠,灌流固定大脑,用组织病理切片和免疫组化染色观察分析海马的ERK1/2表达。结果在出生后14、21、28和42天时,海马CA1和CA3区的ERK1/2表达在PTU5mg/L组、PTU15mg/L组和碘缺乏组显著低于对照组(P<0.05)。DG区的ERK1/2表达与对照组相比差异无显著性。出生后7天时,各组间ERK1/2表达差异无显著性。结论碘缺乏和甲状腺功能减退可降低海马CA1和CA3区的ERK1/2表达。 展开更多
关键词 碘缺乏 甲状腺功能减退 海马 细胞外信号调节蛋白激酶12
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参苓白术散通过ERK/p38 MAPK信号通路干预溃疡性结肠炎大鼠结肠组织AQP3、AQP4的表达 被引量:58
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作者 李姿慧 王键 +2 位作者 蔡荣林 刘晓丽 蒋怀周 《中成药》 CAS CSCD 北大核心 2015年第9期1883-1888,共6页
目的探讨细胞外信号调节激酶/p38丝裂原活化蛋白激酶(ERK/p38MAPK)信号通路在参苓白术散调控脾虚湿困型溃疡性结肠炎大鼠结肠组织水通道蛋白(aquaporin,AQP)3、AQP4表达中的作用。方法将60只Wistar大鼠按照随机数字表均分为正常组、模型... 目的探讨细胞外信号调节激酶/p38丝裂原活化蛋白激酶(ERK/p38MAPK)信号通路在参苓白术散调控脾虚湿困型溃疡性结肠炎大鼠结肠组织水通道蛋白(aquaporin,AQP)3、AQP4表达中的作用。方法将60只Wistar大鼠按照随机数字表均分为正常组、模型组(氯化钠注射液)、参苓白术散组、U0126+参苓白术散组、SB203580+参苓白术散组。除正常组外,脾虚湿困型溃疡性结肠炎大鼠采用2,4,6-三硝基苯磺酸/乙醇灌肠,结合环境与饮食干预复制。14 d后采用蛋白质印迹法检测各组大鼠结肠组织AQP3、AQP4蛋白的表达,实时荧光定量PCR法检测其mRNA表达情况。结果模型组大鼠AQP3、AQP4蛋白表达及其mRNA的表达水平明显低于正常组(P<0.05),参苓白术散组大鼠结肠组织AQP3、AQP4蛋白及mRNA表达较模型组明显升高,组间比较有显著性差异(P<0.05),SB203580+参苓白术散组及U0126+参苓白术散组大鼠结肠组织AQP3、AQP4蛋白及mRNA表达较模型组有较小幅度升高,与正常组和参苓白术散组相比均有显著性差异(P<0.05)。结论参苓白术散可显著改善大鼠结肠组织AQP3、AQP4蛋白及mRNA表达,ERK/p38 MAPK信号通路参与了参苓白术散对脾虚湿困型溃疡性结肠炎大鼠结肠组织AQP3、AQP4表达的调节作用。 展开更多
关键词 参苓白术散 溃疡性结肠炎 细胞外信号调节激酶/p38丝裂原活化蛋白激酶(erk/p38 MAPK) AQP3 AQP4 1 4-二氨基-2 3-二氰基-1 4-双(邻氨基苯巯基)丁二烯(U0126) 4-(4-氟苯基)-2-(4-甲基亚磺酰基苯基)-5-(4-吡啶基)-1H-咪唑(SB203580)
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β-细辛醚对抑郁模型大鼠行为及海马MKP-1,MSK-1,CREB和Bcl-2的影响 被引量:12
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作者 赵春明 张晓杰 +2 位作者 董海影 李姗姗 孙玉荣 《中国实验方剂学杂志》 CAS 北大核心 2013年第16期272-277,共6页
目的:探讨β-细辛醚对抑郁模型大鼠行为学及丝裂原活化蛋白激酶磷酸酶-1(MKP-1),增强有丝分裂原和应激活化蛋白酶-1(MSK-1),cAMP反应元件结合蛋白(CREB)和B细胞淋巴瘤/白血病因子-2(Bcl-2)表达的影响。方法:60只2~3月龄SD大鼠随机分为... 目的:探讨β-细辛醚对抑郁模型大鼠行为学及丝裂原活化蛋白激酶磷酸酶-1(MKP-1),增强有丝分裂原和应激活化蛋白酶-1(MSK-1),cAMP反应元件结合蛋白(CREB)和B细胞淋巴瘤/白血病因子-2(Bcl-2)表达的影响。方法:60只2~3月龄SD大鼠随机分为正常对照组、模型组、氟西汀组和β-细辛醚组,每组15只。采用慢性轻度不可预见性应激加孤养复制抑郁模型,造模第2天开始,氟西汀组和β-细辛醚组灌胃给药,1次/d(氟西汀1.2 mg.kg-1.d-1,β-细辛醚25 mg.kg-1.d-1)。于实验第1,7,14,21天,分别进行体重、糖水消耗量检测和敞箱实验,对大鼠行为学改变进行评定。采用免疫组织化学染色检测MKP-1和Bcl-2蛋白表达,实时定量PCR对MKP-1,MSK-1,CREB和Bcl-2进行定量分析。结果:与模型组比较,氟西汀组和β-细辛醚组大鼠行为学指标显著改善,海马区MKP-1表达减弱、MSK-1,CREB和Bcl-2表达增强,差异有统计学意义(P<0.05)。结论:β-细辛醚可有效改善抑郁模型大鼠的抑郁症状,其机制可能与减少海马区MKP-1,增强MSK-1,CREB和Bcl-2蛋白表达有关。 展开更多
关键词 Β-细辛醚 抑郁 丝裂原活化蛋白激酶磷酸酶-1 有丝分裂原和应激活化蛋白激酶-1 cAMP反应元件结合 蛋白 B细胞淋巴瘤 白血病因子-2
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Role of ERK-MAPK signaling pathway in pentagastrin-regulated growth of large intestinal carcinoma 被引量:4
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作者 Jia-Ding Mao Pei Wu +2 位作者 Jian-Xiong Huang Jian Wu Guang Yang 《World Journal of Gastroenterology》 SCIE CAS 2014年第35期12542-12550,共9页
AIM: To explore the role and mechanisms of extracellular signal-regulated protein kinase-mitogen-activated protein kinase (ERK-MAPK) signaling in pentagastrin-regulated growth of large intestinal carcinoma.
关键词 GASTRIN Mitogen-activated protein kinase Extracellular signal-regulated protein kinase 1/2 K-RAS Large intestinal carcinoma
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MAPK/ERK通路相关蛋白在肺癌组织中的表达及其与肺叶切除术患者预后关系 被引量:5
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作者 张倬 熊飞 李雪曼 《医学研究生学报》 CAS 北大核心 2022年第7期714-719,共6页
目的MAPK/ERK通路相关蛋白在肺癌组织中的表达及其在肺叶切除术肺癌患者预后评估中的作用鲜有报道。文章旨在分析MAPK/ERK通路相关蛋白细胞外信息调节蛋白激酶1/2(ERK1/2)蛋白及其磷酸化(p-ERK1/2)蛋白在肺癌组织中的表达情况,并探讨其... 目的MAPK/ERK通路相关蛋白在肺癌组织中的表达及其在肺叶切除术肺癌患者预后评估中的作用鲜有报道。文章旨在分析MAPK/ERK通路相关蛋白细胞外信息调节蛋白激酶1/2(ERK1/2)蛋白及其磷酸化(p-ERK1/2)蛋白在肺癌组织中的表达情况,并探讨其与肺叶切除术患者临床预后的关系。方法回顾性收集2014年1月至2016年10月于武汉市第三医院胸外科行全胸腔镜肺叶切除术治疗的62例肺癌患者的肺癌组织标本及同一患者距癌变组织>5 cm的癌旁组织标本各62份。采用免疫组化法检测患者肺癌组织及癌旁组织中ERK1/2、p-ERK1/2表达阳性率,采用χ^(2)检验分析肺癌组织中ERK1/2、p-ERK1/2与患者临床病理特征的关系。随访至2021年10月,共57例患者获得随访。采用Kaplan-Meier生存分析法分析ERK1/2、p-ERK1/2表达与患者预后的关系,并拟合Cox模型评价不同指标与患者预后的关系。结果ERK1/2、p-ERK1/2在肺癌组织中主要定位于肿瘤细胞的细胞膜和细胞浆中,阳性肿瘤细胞弥漫分布;ERK1/2在癌旁正常组织中表达较少,p-ERK1/2在癌旁正常组织中呈阴性表达。肺癌组织中ERK1/2、p-ERK1/2蛋白表达阳性率均高于癌旁组织(P<0.05)。ERK1/2在不同分化程度、淋巴结有无转移患者中表达阳性率差异有统计学意义(P<0.05);p-ERK1/2在不同分化程度、临床病理分期、淋巴结有无转移患者中表达阳性率差异有统计学意义(P<0.05)。Kaplan-Meier生存曲线及log-rank分析显示,ERK1/2、p-ERK1/2表达阳性患者与其表达阴性患者术后累积生存率比较,差异有统计学意义(P=0.021、0.018)。多因素Cox比例风险模型显示,肿瘤分化程度低[HR:1.887(1.149~2.684)]、淋巴结转移[HR:2.348(1.109~3.527)]、p-ERK1/2表达阳性[HR:3.258(1.236~5.148)]是影响肺癌患者预后的风险因素(P<0.05)。结论MAPK/ERK通路相关蛋白ERK1/2、p-ERK1/2在肺癌组织中呈现高表达,其中p-ERK1/2表达与肺癌患者预后关系密切,可作为评判肺癌患者预后的重要指标。 展开更多
关键词 肺癌 肺叶切除术 MAPK/erk通路 细胞外信息调节蛋白激酶1/2蛋白 磷酸化细胞外信息调节蛋白激酶1/2蛋白
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Spinal CCL2 Promotes Pain Sensitization by Rapid Enhancement of NMDA-Induced Currents Through the ERK-GluN2B Pathway in Mouse Lamina Ⅱ Neurons 被引量:3
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作者 Hui Zhang Sui-Bin Ma +7 位作者 Yong-Jing Gao Jun-Ling Xing Hang Xian Zhen-Zhen Li Shu-Ning Shen Sheng-Xi Wu Ceng Luo Rou-Gang Xie 《Neuroscience Bulletin》 SCIE CAS CSCD 2020年第11期1344-1354,共11页
Previous studies have shown that CCL2(C-C motif chemokine ligand 2)induces chronic pain,but the exact mechanisms are still unknown.Here,we established models to explore the potential mechanisms.Behavioral experiments ... Previous studies have shown that CCL2(C-C motif chemokine ligand 2)induces chronic pain,but the exact mechanisms are still unknown.Here,we established models to explore the potential mechanisms.Behavioral experiments revealed that an antagonist of extracellular signal-regulated kinase(ERK)inhibited not only CCL2-induced inflammatory pain,but also pain responses induced by complete Freund’s adjuvant.We posed the question of the intracellular signaling cascade involved.Subsequent experiments showed that CCL2 up-regulated the expression of phosphorylated ERK(pERK)and N-methyl D-aspartate receptor[NMDAR]subtype 2B(GluN2B);meanwhile,antagonists of CCR2 and ERK effectively reversed these phenomena.Whole-cell patchclamp recordings revealed that CCL2 enhanced the NMDAR-induced currents via activating the pERK pathway,which was blocked by antagonists of GluN2B and ERK.In summary,we demonstrate that CCL2 directly interacts with CCR2 to enhance NMDAR-induced currents,eventually leading to inflammatory pain mainly through the CCL2-CCR2-pERK-GluN2B pathway. 展开更多
关键词 C-C motif chemokine ligand 2 Monocyte chemoattractant protein 1 Neuron-glial interaction Extracellular signal-regulated kinase
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Bim和细胞外调节蛋白在肝癌多药耐药细胞中的表达 被引量:3
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作者 闫峰 王效民 +2 位作者 马全明 袁思波 蒋楠 《南方医科大学学报》 CAS CSCD 北大核心 2014年第12期1838-1841,共4页
目的检测人肝癌耐药细胞Hep G-2/ADM和亲本细胞Hep G-2中ERK1,ERK2、ERK5和Bim的表达,探讨其对肝癌细胞多药耐药的影响。方法小剂量缓慢诱导法诱导建立人肝癌耐药细胞株Hep G-2/ADM;CCK-8法测定Hep G-2/ADM对多种化疗药物的交叉耐药性;W... 目的检测人肝癌耐药细胞Hep G-2/ADM和亲本细胞Hep G-2中ERK1,ERK2、ERK5和Bim的表达,探讨其对肝癌细胞多药耐药的影响。方法小剂量缓慢诱导法诱导建立人肝癌耐药细胞株Hep G-2/ADM;CCK-8法测定Hep G-2/ADM对多种化疗药物的交叉耐药性;Western-blotting检测MRP-1,P-gp,ERK1,ERK2,ERK5和Bim蛋白水平的表达;荧光定量PCR检测Bim mRNA的表达。结果化疗药物能够体外诱导肿瘤细胞产生耐药性,Hep G-2/ADM对ADM、5-FU和CDDP的耐药指数分别为6.8,4.1和4.5,且高表达MRP-1和P-gp蛋白;与亲本细胞Hep G-2相比,Hep G-2/ADM中ERK1,ERK2和ERK5的表达均升高,ERK1蛋白磷酸化水平无显著变化,ERK2磷酸化水平下降,且p-ERK1/2与ERK1/2的比值下降;Bim的mRNA和蛋白表达均下降。结论细胞外调节蛋白激酶ERKs和Bcl-2家族的促凋亡蛋白Bim的表达与人肝癌多药耐药的发生密切相关。 展开更多
关键词 多药耐药 erk1 erk 2 erk5 EXTRACELLULAR signal-regulated kinase 1 EXTRACELLULAR signal-regulated kinase 2 EXTRACELLULAR signal-regulated kinase 5
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Inflammation-and stress-related signaling pathways in hepatocarcinogenesis 被引量:19
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作者 Hayato Nakagawa Shin Maeda 《World Journal of Gastroenterology》 SCIE CAS CSCD 2012年第31期4071-4081,共11页
It has been established that cancer can be promoted and exacerbated by inflammation.Hepatocellular carcinoma(HCC) is the fifth most common cancer worldwide,and its long-term prognosis remains poor.Although HCC is a co... It has been established that cancer can be promoted and exacerbated by inflammation.Hepatocellular carcinoma(HCC) is the fifth most common cancer worldwide,and its long-term prognosis remains poor.Although HCC is a complex and heterogeneous tumor with several genomic mutations,it usually develops in the context of chronic liver damage and inflammation,suggesting that understanding the mechanism(s) of inflammation-mediated hepatocarcinogenesis is essential for the treatment and prevention of HCC.Chronic liver damage induces a persistent cycle of necroinflammation and hepatocyte regeneration,resulting in genetic mutations in hepatocytes and expansion of initiated cells,eventually leading to HCC development.Recently,several inflammation-and stress-related signaling pathways have been identified as key players in these processes,which include the nuclear factor B,signal transducer and activator of transcription,and stress-activated mitogen-activated protein kinase pathways.Although these pathways may suggest potential therapeutic targets,they have a wide range of functions and complex crosstalk occurs among them.This review focuses on recent advances in our understanding of the roles of these signaling pathways in hepatocarcinogenesis. 展开更多
关键词 Hepatocellular carcinoma INFLAMMATION Nuclear factor-~B Mitogen-activated protein kinase Signal transducer and activator of transcription c-JunNH2-terminal kinase P38 Transforming growth factor-activated kinase 1 Apoptosis signal-regulating kinase 1
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TrkA regulates the regenerative capacity of bone marrow stromal stem cells in nerve grafts 被引量:3
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作者 Mei-Ge Zheng Wen-Yuan Sui +8 位作者 Zhen-Dan He Yan Liu Yu-Lin Huang Shu-Hua Mu Xin-Zhong Xu Ji-Sen Zhang Jun-Le Qu Jian Zhang Dong Wang 《Neural Regeneration Research》 SCIE CAS CSCD 2019年第10期1765-1771,共7页
We previously demonstrated that overexpression of tropomyosin receptor kinase A(TrkA)promotes the survival and Schwann celllike differentiation of bone marrow stromal stem cells in nerve grafts,thereby enhancing the r... We previously demonstrated that overexpression of tropomyosin receptor kinase A(TrkA)promotes the survival and Schwann celllike differentiation of bone marrow stromal stem cells in nerve grafts,thereby enhancing the regeneration and functional recovery of the peripheral nerve.In the present study,we investigated the molecular mechanisms underlying the neuroprotective effects of TrkA in bone marrow stromal stem cells seeded into nerve grafts.Bone marrow stromal stem cells from Sprague-Dawley rats were infected with recombinant lentivirus vector expressing rat TrkA,TrkA-shRNA or the respective control.The cells were then seeded into allogeneic rat acellular nerve allografts for bridging a 1-cm right sciatic nerve defect.Then,8 weeks after surgery,hematoxylin and eosin staining showed that compared with the control groups,the cells and fibers in the TrkA overexpressing group were more densely and uniformly arranged,whereas they were relatively sparse and arranged in a disordered manner in the TrkA-shRNA group.Western blot assay showed that compared with the control groups,the TrkA overexpressing group had higher expression of the myelin marker,myelin basic protein and the axonal marker neurofilament 200.The TrkA overexpressing group also had higher levels of various signaling molecules,including TrkA,pTrkA(Tyr490),extracellular signal-regulated kinases 1/2(Erkl/2),pErk1/2(Thr202/Tyr204),and the anti-apoptotic proteins Bcl-2 and Bcl-xL.In contrast,these proteins were downregulated,while the pro-apoptotic factors Bax and Bad were upregulated,in the TrkA-shRNA group.The levels of the TrkA effectors Akt and pAkt(Ser473)were not different among the groups.These results suggest that TrkA enhances the survival and regenerative capacity of bone marrow stromal stem cells through upregulation of the Erk/Bcl-2 pathway.All procedures were approved by the Animal Ethical and Welfare Committee of Shenzhen University,China in December 2014(approval No.AEWC-2014-001219). 展开更多
关键词 NERVE REGENERATION bone marrow stromal stem cells TROPOMYOSIN RECEPTOR kinase A RECEPTOR LENTIVIRAL vector shRNA extracellular signal-regulated protein kinases 1/2 Bcl-2 NERVE grafts peripheral NERVE REGENERATION survival neural REGENERATION
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MAPKs represent novel therapeutic targets for gastrointestinal motility disorders
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作者 Eikichi Ihara Hirotada Akiho +2 位作者 Kazuhiko Nakamura Sara R Turner Justin A MacDonald 《World Journal of Gastrointestinal Pathophysiology》 CAS 2011年第2期19-25,共7页
The number of patients suffering from symptoms associated with gastrointestinal(GI) motility disorders is on the rise. GI motility disorders are accompanied by alteration of gastrointestinal smooth muscle functions. C... The number of patients suffering from symptoms associated with gastrointestinal(GI) motility disorders is on the rise. GI motility disorders are accompanied by alteration of gastrointestinal smooth muscle functions. Currently available drugs,which can directly affect gastrointestinal smooth muscle and restore altered smooth muscle contractility to normal,are not satisfactory for treating patients with GI motility disorders. We have recently shown that ERK1/2 and p38MAPK signaling pathways play an important role in the contractile response not only of normal intestinal smooth muscle but also of inflamed intestinal smooth muscle. Here we discuss the possibility that ERK1/2 and p38MAPK signaling pathways represent ideal targets for generation of novel therapeutics for patients with GI motility disorders. 展开更多
关键词 MITOGEN-ACTIVATED protein kinase P38MAPK erk1/2 Smooth muscle CONTRACTILE DYSFUNCTION
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Arrestin-mediated signaling: Is there a controversy?
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作者 Vsevolod V Gurevich Eugenia V Gurevich 《World Journal of Biological Chemistry》 CAS 2018年第3期25-35,共11页
The activation of the mitogen-activated protein(MAP) kinases extracellular signal-regulated kinase(ERK)1/2 was traditionally used as a readout of signaling of G protein-coupled receptors(GPCRs) via arrestins, as oppos... The activation of the mitogen-activated protein(MAP) kinases extracellular signal-regulated kinase(ERK)1/2 was traditionally used as a readout of signaling of G protein-coupled receptors(GPCRs) via arrestins, as opposed to conventional GPCR signaling via G proteins. Several recent studies using HEK293 cells where all G proteins were genetically ablated or inactivated, or both non-visual arrestins were knocked out, demonstrated that ERK1/2 phosphorylation requires G protein activity, but does not necessarily require the presence of non-visual arrestins. This appears to contradict the prevailing paradigm. Here we discuss these results along with the recent data on gene edited cells and arrestinmediated signaling. We suggest that there is no real controversy. G proteins might be involved in the activation of the upstream-most MAP3Ks, although in vivo most MAP3K activation is independent of heterotrimeric G proteins, being initiated by receptor tyrosine kinases and/or integrins. As far as MAP kinases are concerned, the best-established role of arrestins is scaffolding of the three-tiered cascades(MAP3K-MAP2 K-MAPK). Thus, it seems likely that arrestins, GPCRbound and free, facilitate the propagation of signals in these cascades, whereas signal initiation via MAP3K activation may be independent of arrestins. Different MAP3Ks are activated by various inputs, some of which are mediated by G proteins, particularly in cell culture, where we artificially prevent signaling by receptor tyrosine kinases and integrins, thereby favoring GPCR-induced signaling. Thus, there is no reason to change the paradigm: Arrestins and G proteins play distinct non-overlapping roles in cell signaling. 展开更多
关键词 G protein-coupled receptors ARRESTIN G protein SIGNALING Extracellular signal-regulated kinase 1/2 c-Jun N-TERMINAL kinase 3
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Effect of Korean Magnolia obovata Extract on Platelet-Derived Growth Factor-Induced Vascular Smooth Muscle Cells 被引量:1
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作者 Hyunjhung Jhun Suji Baek +5 位作者 Jinwoo Kim Kang-Pa Lee Hun-Young Park Won-Hwan Park Kiwon Lim Jisu Kim 《Chinese Journal of Integrative Medicine》 SCIE CAS CSCD 2020年第9期677-682,共6页
Objective:To investigate the effects of Korean Magnolia obovata crude extract(KME)on plateletderived growth factor(PDGF)-BB-induced proliferation and migration of vascular smooth muscle cells(VSMCs).Methods:KME compos... Objective:To investigate the effects of Korean Magnolia obovata crude extract(KME)on plateletderived growth factor(PDGF)-BB-induced proliferation and migration of vascular smooth muscle cells(VSMCs).Methods:KME composition was analyzed by high-performance liquid chromatography(HPLC).VSMCs were isolated from the aorta of a Sprague-Dawley rat,incubated in serum free-Dulbecco's modified Eagle's medium in the presence or absence of KME(10,30,100,and 300(xg/mL),then further treated with PDGF-BB(10 ng/mL).VSMC proliferation was detected using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay and VSMC migration was determined using the Boyden chamber and scratch wound healing assays.Western blot analysis was used to detect phosphorylation of extracellular signal-regulated protein kinases 1 and 2(p-ERK1/2),protein kinase B(p-Akt),and stress-activated protein kinase/c-Jun NH2-terminal kinase(p-SAPK/JNK).The antimigration and proliferation effects of KME were tested using aortic sprout outgrowth.Results:The HPLC analysis identified honokiol(0.45 mg/g)and magnolol(0.34 mg/g)as the major components of KME.KME(30,100,and 300μg/m L)significantly decreased the proliferation and migration of PDGF-BB-stimulated(10 ng/mL)VSMCs and the PDGF-BB-induced phosphorylation of EKR1/2,Akt,and SAPK/JNK(P<0.05).Furthermore,PDGF-BBinduced VSMCs treated with 300μg/m L of KME showed reduction in aortic sprout outgrowth.Conclusion:KME could inhibit abnormal proliferation and migration of VSMCs by down-regulating the phosphorylation of EKR1/2 and Akt.Thus,KME might be a functional food for preventing vascular disorders. 展开更多
关键词 extracellular signal-regulated protein kinases 1 and 2 AKT platelet-derived growth factor-BB smooth muscle cell functional food
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Alantolactone inhibits proliferation,metastasis and promotes apoptosis of human osteosarcoma cells by suppressing Wnt/β-catenin and MAPKs signaling pathways 被引量:1
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作者 Chunmei Yang Lulu Zhang +7 位作者 Huakun Huang Xiaohui Yuan Ping Zhang Caihong Ye Mengqi Wei Yanran Huang Xiaoji Luo Jinyong Luo 《Genes & Diseases》 SCIE 2022年第2期466-478,共13页
Although there are many therapeutic strategies such as surgery and chemotherapy,the prognosis of osteosarcoma(OS)is still far from being satisfactory.It is urgent to develop more effective,tolerable and safe drugs for... Although there are many therapeutic strategies such as surgery and chemotherapy,the prognosis of osteosarcoma(OS)is still far from being satisfactory.It is urgent to develop more effective,tolerable and safe drugs for the treatment of OS.In the present study,we investigated the anti-OS activity of Alantolactone(ALT),a natural eucalyptone sesquiterpene lactone mainly exists in Inula helenium,and probed the possible mechanism involved.We demonstrated that ALT significantly inhibited cell proliferation of various human OS cell lines while had relative lower cytotoxicity against normal cells.Then,we validated that ALT reduced migration,decreased invasion possibly through reversing epithelial mesenchymal transition(EMT)process and suppressing Matrix metalloproteinases(MMPs).Moreover,we confirmed that ALT promoted apoptosis and arrested cell cycle at G2/M phase of human OS cells in vitro.In addition,we confirmed that ALT restrained tumor growth and metastasis of OS 143 cells in a xenograft model in vivo.Mechanistically,ALT inhibited the activity of Wnt/β-catenin and p38,ERK1/2 and JNK Mitogen Activated Protein Kinases(MAPKs)signal pathway.Notably,the combination of ALT and Wnt/β-catenin inhibitor,as well as the combination of ALT and MAPKs inhibitors resulted in a synergistically effect on inhibiting the proliferation,migration and invasion of OS cells.Collectively,our results validate the ALT may inhibit proliferation,metastasis and promotes apoptosis of human OS cells possibly through suppressing Wnt/β-Catenin and MAPKs signaling pathways. 展开更多
关键词 ALANTOLACTONE erk1/2 JNK Mitogen activated protein kinases OSTEOSARCOMA p38 WNT/Β-CATENIN
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