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Mitogen activated protein kinase signaling pathways participate in the active principle region of Buyang Huanwu decoction-induced differentiation of bone marrow mesenchymal stem cells 被引量:2
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作者 Jinghui Zheng Jian Liang +6 位作者 Xin Deng Xiaofeng Chen Fasheng Wu Xiaofang Zhao Yuan Luo Lei Fu Zuling Jiang 《Neural Regeneration Research》 SCIE CAS CSCD 2012年第18期1370-1377,共8页
Our preliminary studies confirmed that an active principle region of Buyang Huanwu decoction, comprising alkaloid, polysaccharide, aglycon, glucoside and volatile oil, can induce bone marrow mesenchymal stem cell diff... Our preliminary studies confirmed that an active principle region of Buyang Huanwu decoction, comprising alkaloid, polysaccharide, aglycon, glucoside and volatile oil, can induce bone marrow mesenchymal stem cell differentiation into neurons. Mitogen-activated protein kinase signaling was identified as one of the key pathways underlying this differentiation process. The present study shows phosphorylated extracellular signal-regulated protein kinase and phosphorylated p38 protein expression was increased after differentiation. Cellular signaling pathway blocking agents, PD98059 and SB203580, inhibited extracellular signal-regulated protein kinase and p38 in mitogen-activated protein kinase signaling pathways respectively, mRNA and protein expression of the neuronal marker, neuron specific enolase, and neural stem cell marker, nestin, were decreased in bone marrow mesenchymal stem cells after treatment with the active principle region of Buyang Huanwu decoction. Experimental findings indicate that, extracellular signal-regulated protein kinase and p38 in mitogen-activated protein kinase signaling pathways participate in bone marrow mesenchymal stem cell differentiation into neuron-like cells, induced by the active principle region of Buyang Huanwu decoction. 展开更多
关键词 Buyang Huanwu decoction bone marrow mesenchymal stem ceils extracellular signal-regulatedprotein kinase mitogen-activated protein kinase signaling pathway neuron specific enolase NESTIN cell signal transduction pathway neural regeneration
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Neuroprotective mechanisms of rutin for spinal cord injury through anti-oxidation and anti-inflammation and inhibition of p38 mitogen activated protein kinase pathway 被引量:10
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作者 Hong-liang Song Xiang Zhang +5 位作者 Wen-zhao Wang Rong-han Liu Kai Zhao Ming-yuan Liu Wei-ming Gong Bin Ning 《Neural Regeneration Research》 SCIE CAS CSCD 2018年第1期128-134,共7页
Rutin has anti-inflammatory, antioxidant, anti-viral, anti-tumor and immune regulatory effects. However, the neuroprotective effects of rutin in spinal cord injury are unknown. The p38 mitogen activated protein kinase... Rutin has anti-inflammatory, antioxidant, anti-viral, anti-tumor and immune regulatory effects. However, the neuroprotective effects of rutin in spinal cord injury are unknown. The p38 mitogen activated protein kinase (p38 MAPK) pathway is the most important member of the MAPK family that controls inflammation. We assumed that the mechanism of rutin in the repair of spinal cord injury is associated with the inhibition of p38 MAPK pathway. Allen’s method was used to establish a rat model of spinal cord injury. The rat model was intraperitoneally injected with rutin (30 mg/kg) for 3 days. After treatment with rutin, Basso, Beattie and Bresnahan locomotor function scores increased. Water content, tumor necrosis factor alpha, interleukin 1 beta, and interleukin 6 levels, p38 MAPK protein expression and caspase-3 and -9 activities in T8–9 spinal cord decreased. Oxidative stress related markers superoxide dismutase and glutathione peroxidase levels increased in peripheral blood. Rutin exerts neuroprotective effect through anti-oxidation, anti-inflammation, anti-apoptosis and inhibition of p38 MAPK pathway. 展开更多
关键词 nerve regeneration spinal cord injury RUTIN oxidative stress antioxidant ANTI-INFLAMMATION p38 mitogen activated protein kinase pathway ANTI-APOPTOSIS caspase-3 caspase-9 neural regeneration
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Bacteroides fragilis enterotoxin upregulates heme oxygenase-1 in dendritic cells via reactive oxygen species-,mitogen-activated protein kinase-,and Nrf2-dependent pathway 被引量:1
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作者 Su Hyuk Ko Jong Ik Jeon +1 位作者 Hyun Ae Woo Jung Mogg Kim 《World Journal of Gastroenterology》 SCIE CAS 2020年第3期291-306,共16页
BACKGROUND Enterotoxigenic Bacteroides fragilis(ETBF)causes colitis and diarrhea,and is considered a candidate pathogen in inflammatory bowel diseases as well as colorectal cancers.These diseases are dependent on ETBF... BACKGROUND Enterotoxigenic Bacteroides fragilis(ETBF)causes colitis and diarrhea,and is considered a candidate pathogen in inflammatory bowel diseases as well as colorectal cancers.These diseases are dependent on ETBF-secreted toxin(BFT).Dendritic cells(DCs)play an important role in directing the nature of adaptive immune responses to bacterial infection and heme oxygenase-1(HO-1)is involved in the regulation of DC function.AIM To investigate the role of BFT in HO-1 expression in DCs.METHODS Murine DCs were generated from specific pathogen-free C57BL/6 and Nrf2−/−knockout mice.DCs were exposed to BFT,after which HO-1 expression and the related signaling factor activation were measured by quantitative RT-PCR,EMSA,fluorescent microscopy,immunoblot,and ELISA.RESULTS HO-1 expression was upregulated in DCs stimulated with BFT.Although BFT activated transcription factors such as NF-κB,AP-1,and Nrf2,activation of NF-κB and AP-1 was not involved in the induction of HO-1 expression in BFT-exposed DCs.Instead,upregulation of HO-1 expression was dependent on Nrf2 activation in DCs.Moreover,HO-1 expression via Nrf2 in DCs was regulated by mitogenactivated protein kinases such as ERK and p38.Furthermore,BFT enhanced the production of reactive oxygen species(ROS)and inhibition of ROS production resulted in a significant decrease of phospho-ERK,phospho-p38,Nrf2,and HO-1 CONCLUSION These results suggest that signaling pathways involving ROS-mediated ERK and p38 mitogen-activated protein kinases-Nrf2 activation in DCs are required for HO-1 induction during exposure to ETBF-produced BFT. 展开更多
关键词 Bacteroides fragilis enterotoxin Dendritic cells Heme oxygenase-1 mitogen-activated protein kinases NRF2 signaling
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Mitogen-Activated Protein Kinase Pathways Following Traumatic Brain Injury 被引量:1
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作者 Naoki Otani Hiroshi Nawashiro +3 位作者 Kimihiro Nagatani Satoru Takeuchi Hiroaki Kobayashi Katsuji Shima 《Neuroscience & Medicine》 2011年第3期208-216,共9页
The mechanisms underlying the secondary or delayed cell death in the hippocampus and cerebral hemisphere after traumatic brain injury (TBI) have been poorly understood. Recent data suggesting that TBI may have relatio... The mechanisms underlying the secondary or delayed cell death in the hippocampus and cerebral hemisphere after traumatic brain injury (TBI) have been poorly understood. Recent data suggesting that TBI may have relationship with both an inflammatory and a neurodegenerative factors are also presented. Mitogen-activated protein kinases (MAPK), which play a crucial role in signal transduction, are activated by phosphorylation in response to a variety of mitogenic signals. In this article, we review the clinical and experimental evidence for brain damage after TBI. In addition, the MAPK pathways, closely involved in signal transduction after TBI, which could therefore be a new and potentially effective therapeutic target in TBI. Further investigations are therefore necessary to better understand cerebral traumatic damage and delineate the best practice strategies needed to improve the patient outcomes after TBI. 展开更多
关键词 TRAUMATIC Brain INJURY mitogen-activated protein kinase Cell signaling
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Downregulation of cold-inducible RNA-binding protein activates mitogen-activated protein kinases and impairs spermatoRenic function in mouse testes 被引量:8
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作者 Zhi-Ping Xia Xin-Min Zheng +3 位作者 Hang Zheng Xiao-Jun Liu Gui-Yong Liu Xing-Huan Wang 《Asian Journal of Andrology》 SCIE CAS CSCD 2012年第6期884-889,共6页
Cold-inducible RNA-binding protein (CIRP) is an RNA-binding protein that is expressed in normal testes and downregulated after heat stress caused by cryptorchidism, varicocele or environmental temperatures. The purp... Cold-inducible RNA-binding protein (CIRP) is an RNA-binding protein that is expressed in normal testes and downregulated after heat stress caused by cryptorchidism, varicocele or environmental temperatures. The purpose of this study was to investigate the functions of CIRP in the testes. We employed RNAi technique to knock down the expression of CIRP in the testes, and performed haematoxylin and eosin staining to evaluate morphological changes following knockdown. Germ cell apoptosis was examined by terminal deoxynucleotidal transferase-mediated dUTP nick end labelling (TUNEL) assay, and mitogen-activated protein kinase (MAPK) signalling pathways were investigated by Western blotting to determine the possible mechanism of apoptosis. We found that using siRNA is a feasible and reliable method for knocking down gene expression in the testes. Compared to controls, the mean seminiferous tubule diameter (MSTD) and the thickness of the germ cell layers decreased following siRNA treatment, whereas the percentage of apoptotic seminiferous tubules increased. The p44/p42, p38 and SAPK/JNK MAPK pathways were activated after downregulation of CIRP. In conclusion, we discovered that downregulation of CIRP resulted in increased germ cell apoptosis, possibly viathe activation of the p44/p42, p38 and SAPK/JNK MAPK pathways. 展开更多
关键词 cold-inducible RNA-binding protein (CIRP) mitogen-activated protein kinase mapk siRNA in vivo SPERMATOGENESIS heat stress male infertility
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Physiological roles of mitogen-activated-protein-kinase-activated p38-regulated/activated protein kinase 被引量:8
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作者 Sergiy Kostenko Gianina Dumitriu +1 位作者 Kari Jenssen Lgreid Ugo Moens 《World Journal of Biological Chemistry》 CAS 2011年第5期73-89,共17页
Mitogen-activated protein kinases(MAPKs)are a family of proteins that constitute signaling pathways involved in processes that control gene expression,cell division, cell survival,apoptosis,metabolism,differentiation ... Mitogen-activated protein kinases(MAPKs)are a family of proteins that constitute signaling pathways involved in processes that control gene expression,cell division, cell survival,apoptosis,metabolism,differentiation and motility.The MAPK pathways can be divided into conventional and atypical MAPK pathways.The first group converts a signal into a cellular response through a relay of three consecutive phosphorylation events exerted by MAPK kinase kinases,MAPK kinase,and MAPK.Atypical MAPK pathways are not organized into this three-tiered cascade.MAPK that belongs to both conventional and atypical MAPK pathways can phosphorylate both non-protein kinase substrates and other protein kinases.The latter are referred to as MAPK-activated protein kinases.This review focuses on one such MAPK-activated protein kinase,MAPK-activated protein kinase 5(MK5)or p38-regulated/activated protein kinase(PRAK).This protein is highly conserved throughout the animal kingdom and seems to be the target of both conventional and atypical MAPK pathways.Recent findings on the regulation of the activity and subcellular localization,bona fide interaction partners and physiological roles of MK5/PRAK are discussed. 展开更多
关键词 mitogen-activated protein kinase p38- regulated/activated protein kinase Extracellular signalregulated kinase protein kinase A SUBCELLULAR localization Phosphorylation protein interaction
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Mitogen-activated protein kinase phosphatase 1 protects PC12 cells from amyloid beta-induced neurotoxicity 被引量:7
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作者 Yue Gu Lian-Jun Ma +4 位作者 Xiao-Xue Bai Jing Jie Xiu-Fang Zhang Dong Chen Xiao-Ping Li 《Neural Regeneration Research》 SCIE CAS CSCD 2018年第10期1842-1850,共9页
The mitogen-activated protein kinase(MAPK) signaling pathway plays an important role in the regulation of cell growth, proliferation, differentiation, transformation and death. Mitogen-activated protein kinase phosp... The mitogen-activated protein kinase(MAPK) signaling pathway plays an important role in the regulation of cell growth, proliferation, differentiation, transformation and death. Mitogen-activated protein kinase phosphatase 1(MKP1) has an inhibitory effect on the p38 MAPK and JNK pathways, but it is unknown whether it plays a role in Aβ-induced oxidative stress and neuronal inflammation. In this study, PC12 cells were infected with MKP1 sh RNA, MKP1 lentivirus or control lentivirus for 12 hours, and then treated with 0.1, 1, 10 or 100 μM amyloid beta 42(Aβ42). The cell survival rate was measured using the cell counting kit-8 assay. MKP1, tumor necrosis factor-alpha(TNF-α) and interleukin-1β(IL-1β) m RNA expression levels were analyzed using quantitative real time-polymerase chain reaction. MKP1 and phospho-c-Jun N-terminal kinase(JNK) expression levels were assessed using western blot assay. Reactive oxygen species(ROS) levels were detected using 2′,7′-dichlorofluorescein diacetate. Mitochondrial membrane potential was measured using flow cytometry. Superoxide dismutase activity and malondialdehyde levels were evaluated using the colorimetric method. Lactate dehydrogenase activity was measured using a microplate reader. Caspase-3 expression levels were assessed by enzyme-linked immunosorbent assay. Apoptosis was evaluated using the terminal deoxynucleotidyl transferase d UTP nick end labeling method. MKP1 overexpression inhibited Aβ-induced JNK phosphorylation and the increase in ROS levels. It also suppressed the Aβ-induced increase in TNF-α and IL-1β levels as well as apoptosis in PC12 cells. In contrast, MKP1 knockdown by RNA interference aggravated Aβ-induced oxidative stress, inflammation and cell damage in PC12 cells. Furthermore, the JNK-specific inhibitor SP600125 abolished this effect of MKP1 knockdown on Aβ-induced neurotoxicity. Collectively, these results show that MKP1 mitigates Aβ-induced apoptosis, oxidative stress and neuroinflammation by inhibiting the JNK signaling pathway, thereby playing a neuroprotective role. 展开更多
关键词 nerve regeneration mitogen-activated protein kinase phosphatase 1 c-Jun N-terminal kinase signaling pathway Alzheimer's disease neurons DEMENTIA apoptosis RNA interference lentivirus inflammation oxidative stress neural regeneration
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Influence of electroacupuncture on mitogen-activated protein kinase signal transduction in a rat model of cerebral ischemia/reperfusion 被引量:1
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作者 Zhongren Li Meihong Shen +1 位作者 Wenmin Niu Xiaoren Xiang 《Neural Regeneration Research》 SCIE CAS CSCD 2011年第30期2362-2366,共5页
Following electroacupuncture at Baihui (DU 20) and Dazhui (DU 14) in a rat model of cerebral ischemia/reperfusion, extracellular-signal-regulated kinase expression in cerebral cortex and corpus striatum, serum glu... Following electroacupuncture at Baihui (DU 20) and Dazhui (DU 14) in a rat model of cerebral ischemia/reperfusion, extracellular-signal-regulated kinase expression in cerebral cortex and corpus striatum, serum glutathione reductase, glutathione peroxidase activity, and serum glutathione content were elevated, and neurobehavioral scores improved. However, these effects were antagonized by mitogen-activated protein kinase inhibitor PD98059. Results indicated that electroacupuncture reversed free radical chain reactions and oxidative stress injury caused by cerebral ischemia/reperfusion, thereby providing neuroprotection. This process could correlate with the mitogen-activated protein kinase signal transduction pathway. 展开更多
关键词 anti-oxidative stress cerebral ischemia/reperfusion ELECTROACUPUNCTURE mitogen-activated protein kinase pathway signal transduction
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Overinhibition of Mitogen-Activated Protein Kinase Inducing Tau Hyperphosphorylation
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作者 LIHong-lian CHENJuan LIUShi-jie ZHANGJia-yu WANGQun WANGJian-Zhi 《Wuhan University Journal of Natural Sciences》 EI CAS 2005年第3期607-610,共4页
To reveal the relationship between mitogen-acti-vated protein kinase (MAPK)and tau phosphorylation, we used different concentration of PD98059, an inhibitor of MEK (MAPKkinase), to treat mice neuroblastma (N2a) cell l... To reveal the relationship between mitogen-acti-vated protein kinase (MAPK)and tau phosphorylation, we used different concentration of PD98059, an inhibitor of MEK (MAPKkinase), to treat mice neuroblastma (N2a) cell line for 6 h. It showed that theactivity of MAPKdecreased in a dose-dependent manner. But Western blot and immunofluo-rescence revealed that justwhen the cells were treated with 16 mu mol/L PD98059, tau was hyperphosphorylated at Ser396/ 404 andSerl99/202 sites. We obtained the conclusion that overinhibited MAPK induced tauhyperphosphorylation at Ser396/404 and Serl99/202 sites. 展开更多
关键词 mitogen-activated protein kinase (mapk) TAU Alzheimer's disease
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Marsdenia tenacissima extract induces G_0/G_1 cell cycle arrest in human esophageal carcinoma cells by inhibiting mitogen-activated protein kinase(MAPK) signaling pathway 被引量:33
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作者 FAN Wei SUN Li +6 位作者 ZHOU Jing-Qian ZHANG Cang QIN Song TANG Ying LIU Yang LIN Sen-Sen YUAN Sheng-Tao 《Chinese Journal of Natural Medicines》 SCIE CAS CSCD 2015年第6期428-437,共10页
Marsdenia tenacissima extract(MTE, trade name: Xiao-Ai-Ping injection) is an extract of a single Chinese plant medicine. It has been used for the treatment of cancer in China for decades, especially for esophageal can... Marsdenia tenacissima extract(MTE, trade name: Xiao-Ai-Ping injection) is an extract of a single Chinese plant medicine. It has been used for the treatment of cancer in China for decades, especially for esophageal cancer and other cancers in the digestive tract. In the present study, the potential mechanism for MTE's activity in esophageal cancer was explored. The effects of MTE on the proliferation of human esophageal cancer cells(KYSE150 and Eca-109) were investigated by the MTT assay, the Brd U(bromodeoxyuridine) incorporation immunofluorescence assay, and flow cytometric analysis. MTE inhibited cell proliferation through inducing G0/G1 cell cycle arrest in KYSE150 and Eca-109. Western blot analysis was employed to determine protein levels in the MTE treated cells. Compared with the control cells, the expression levels of the cell cycle regulatory proteins cyclin D1/D2/D3, cyclin E1, CDK2/4/6(CDK: cyclin dependent kinase), and p-Rb were decreased significantly in the cells treated with MTE at 40 mg·m L-1. In addition, MTE had an inhibitory effect on the MAPK(mitogen-activated protein kinase) signal transduction pathway, including ERK(extracellular signal-regulated kinase), JNK(c-Jun N-terminal kinase), and p38 MAPK. Moreover, MTE showed little additional effects on the regulation of cyclin D1/D3, CDK4/6, and p-Rb when the ERK pathway was already inhibited by the specific ERK inhibitor U0126. In conclusion, these data suggest that MTE inhibits human esophageal cancer cell proliferation through regulation of cell cycle regulatory proteins and the MAPK signaling pathways, which is probably mediated by the inhibition of ERK activation. 展开更多
关键词 Marsdenia tenacissima extract Cell cycle arrest mitogen-activated protein kinase signaling pathway Human esophageal cancer
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木犀草素阻断p38 MAPK通路对宫颈癌细胞增殖、迁移、侵袭和上皮间质转化的抑制作用研究
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作者 王玉娜 赵新然 +2 位作者 赵娜 丁玲 曾倩 《中国性科学》 2024年第2期84-88,共5页
目的探讨木犀草素通过调控p38丝裂原活化蛋白激酶(MAPK)通路对宫颈癌细胞增殖、迁移、侵袭和上皮间质转化(EMT)的影响。方法子宫颈鳞状细胞癌SiHa细胞系经不同浓度木犀草素处理24 h,细胞计数试剂盒(CCK-8)法检测细胞活力以筛选最适木犀... 目的探讨木犀草素通过调控p38丝裂原活化蛋白激酶(MAPK)通路对宫颈癌细胞增殖、迁移、侵袭和上皮间质转化(EMT)的影响。方法子宫颈鳞状细胞癌SiHa细胞系经不同浓度木犀草素处理24 h,细胞计数试剂盒(CCK-8)法检测细胞活力以筛选最适木犀草素作用浓度,后将SiHa细胞分为对照组、木犀草素组、阳性药物组、抑制剂组和激活剂组,干预24 h后,采用倒置显微镜、细胞增殖试剂盒、划痕、Transwell小室和蛋白免疫印迹法测定细胞形态、增殖、迁移、侵袭及EMT和p38 MAPK通路相关蛋白表达的情况。结果根据CCK-8法确定木犀草素最适作用浓度为10μmol/L。与对照组相比,木犀草素组和阳性药物组细胞的生长受到抑制,增殖率、迁移率、侵袭数,以及波形蛋白(Vimentin)、N-钙黏蛋白(N-cadherin)和纤维连接蛋白(FN)表达水平、p-p38 MAPK/p38 MAPK比值降低(P<0.05),E-钙黏蛋白(E-cadherin)表达水平上升(P<0.05);与木犀草素组相比,SB203580增强了、茴香霉素抑制了木犀草素对SiHa细胞的上述作用(P<0.05)。结论木犀草素可通过阻断p38 MAPK通路抑制SiHa细胞的增殖、迁移、侵袭及EMT进程。 展开更多
关键词 宫颈癌 木犀草素 p38丝裂原活化蛋白激酶信号通路 侵袭 N-钙黏蛋白
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基于MAPK通路探讨三虫通络散结方对Lewis肺癌小鼠的抑瘤作用
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作者 李阳 张洽淳 +4 位作者 陈蕾 莫潘艳 黄国栋 王济国 曾超 《湖南中医药大学学报》 CAS 2024年第12期2164-2171,共8页
目的研究三虫通络散结方对Lewis肺癌小鼠的抑瘤作用及对丝裂原活化蛋白激酶(mitogen-activated protein kinase,MAPK)信号通路的调控作用。方法选取C57BL/6小鼠48只,随机挑选6只作为空白组;42只C57BL/6小鼠构建Lewis肺癌荷瘤小鼠模型,... 目的研究三虫通络散结方对Lewis肺癌小鼠的抑瘤作用及对丝裂原活化蛋白激酶(mitogen-activated protein kinase,MAPK)信号通路的调控作用。方法选取C57BL/6小鼠48只,随机挑选6只作为空白组;42只C57BL/6小鼠构建Lewis肺癌荷瘤小鼠模型,随机分为模型组(生理盐水)、阳性对照组(顺铂注射液2 mg/kg)、散剂低剂量组(三虫通络散结方散剂0.45 g/kg)、散剂高剂量组(三虫通络散结方散剂1.8 g/kg)、散剂低剂量+顺铂组(三虫通络散结方散剂0.45 g/kg+顺铂注射液2 mg/kg)、汤剂低剂量组(三虫通络散结方汤剂3.9 g/kg)、汤剂高剂量组(三虫通络散结方汤剂15.6 g/kg),每组6只,给药14 d后取材。计算抑瘤率和去瘤体质量;HE染色观察皮下移植瘤体、肺组织、肝组织的病理变化;qPCR检测皮下移植瘤细胞外调节蛋白激酶(extracellular regulated protein kinases,Erk)、缺氧诱导因子-1α(hypoxia inducible factor-1α,HIF-1α)、p38、血管内皮生长因子A(vascular endothelial growth factor A,VEGFA)、c-Jun氨基末端激酶(c-Jun N-terminal kinase,JNK)、基质金属蛋白酶-2(matrix metalloproteinase-2,MMP-2)mRNA的表达量;Western blot检测皮下移植瘤Erk、HIF-1α、p38、VEGFA、JNK、MMP-2蛋白表达情况。结果(1)与模型组相比,阳性对照组、散剂低剂量+顺铂组、散剂高剂量组瘤体质量降低(P<0.05)。与散剂低剂量组相比,散剂高剂量组瘤体质量降低(P<0.05)。与阳性对照组相比,各中药单药组及模型组去瘤体质量升高(P<0.05)。(2)各组小鼠肺组织HE染色结果显示,散剂低剂量+顺铂组见较多肿瘤细胞坏死;各中药组细胞均少见核分裂,肿瘤转移灶较模型组少。各组小鼠肝组织HE染色结果显示,散剂低剂量+顺铂组、阳性对照组未见明显肿瘤病灶形成;散剂高剂量组、汤剂高剂量组的肿瘤转移灶体积相对较小。(3)与模型组相比,其余各荷瘤组皮下移植瘤组织中Erk、p38 mRNA表达下降(P<0.05),散剂低剂量+顺铂组、散剂低剂量组、汤剂低剂量组、汤剂高剂量组JNK mRNA表达下降(P<0.05);与阳性对照组相比,散剂低剂量+顺铂组及各中药组皮下移植瘤组织中JNK mRNA表达下降(P<0.05)。(4)与模型组相比,阳性对照组、散剂低剂量组、汤剂高剂量组Erk蛋白表达水平降低(P<0.05),阳性对照组、散剂低剂量+顺铂组、散剂低剂量组、散剂高剂量组、汤剂高剂量组p38、HIF-1α蛋白表达水平降低(P<0.05),其余各荷瘤组JNK蛋白表达水平均降低(P<0.05)。结论三虫通络散结方对Lewis肺癌小鼠有一定的抑瘤作用,以散剂高剂量组抑瘤效果较优,其机制可能是与抑制MAPK信号通路相关。 展开更多
关键词 LEWIS肺癌细胞 三虫通络散结方 肺癌 mapk信号通路 抑瘤作用
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IGF-1介导MAPKs通路在C3H10T1/2细胞成骨分化中的作用
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作者 李冬 董晓俊 徐成栋 《中国骨质疏松杂志》 CAS CSCD 北大核心 2024年第5期668-672,共5页
目的探究胰岛素样生长因子1(IGF-1)介导丝裂原活化蛋白激酶(MAPKs)信号通路在C3H10T1/2细胞成骨分化中的调控作用及机制。方法不同浓度IGF-1(0、5、10、20 ng/mL)培养C3H10T1/2细胞,碱性磷酸酶(ALP)与茜素红(ARS)染色检测ALP活性、钙盐... 目的探究胰岛素样生长因子1(IGF-1)介导丝裂原活化蛋白激酶(MAPKs)信号通路在C3H10T1/2细胞成骨分化中的调控作用及机制。方法不同浓度IGF-1(0、5、10、20 ng/mL)培养C3H10T1/2细胞,碱性磷酸酶(ALP)与茜素红(ARS)染色检测ALP活性、钙盐沉积情况,qRT-PCR法检测成骨特性因子核心结合因子α-1(RUNX2)、成骨分化特异性因子骨桥蛋白(OPN)、骨钙蛋白(OCN)mRNA表达水平,Western Blot法检测MAPK通路蛋白磷酸化表达水平。对数期细胞分为空白组、IGF-1组、ERK通路抑制剂(PD98059)组、PD+IGF-1组、p38通路抑制剂(SB202192)组、SB+IGF-1组,qRT-PCR法检测成骨特性因子RUNX2、成骨分化特异性因子骨桥蛋白(OPN)、骨钙蛋白(OCN)mRNA表达水平。结果不同浓度IGF-1组ALP显色加深,ALP活性升高,钙盐结节形成增多,RUNX2、OPN、OCN mRNA表达水平升高,磷酸化ERK、p38、JNK蛋白表达增加,具有剂量效应(P<0.05)。与空白组比较,PD组、SB组C3H10T1/2细胞RUNX2、OPN、OCN mRNA表达水平明显降低(P<0.05),PD+IGF-1组、SB+IGF-1组C3H10T1/2细胞RUNX2、OPN、OCN mRNA表达水平明显升高(P<0.05);但与IGF-1组比较,PD+IGF-1组、SB+IGF-1组C3H10T1/2细胞RUNX2、OPN、OCN mRNA表达水平明显降低(P<0.05)。结论IGF-1促进C3H10T1/2细胞成骨分化,其作用机制可能与激活ERK信号通路和p38 MAPK信号通路有关。 展开更多
关键词 胰岛素样生长因子1 丝裂原活化蛋白激酶信号通路 C3H10T1/2细胞 成骨分化
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黄连碱预处理对心肌缺血再灌注损伤大鼠JNK/p38MAPK信号通路的影响
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作者 赵志成 郭天龙 《中西医结合心脑血管病杂志》 2024年第17期3122-3127,共6页
目的:探讨黄连碱预处理对心肌缺血再灌注(MI/RI)大鼠c-Jun氨基末端激酶(JNK)/促分裂素原活化蛋白激酶(p38MAPK)信号通路的影响。方法:将60只大鼠随机分为MI/RI组、假手术组、黄连碱低剂量组(黄连碱-L组,50 mg/kg黄连碱)、黄连碱中剂量组... 目的:探讨黄连碱预处理对心肌缺血再灌注(MI/RI)大鼠c-Jun氨基末端激酶(JNK)/促分裂素原活化蛋白激酶(p38MAPK)信号通路的影响。方法:将60只大鼠随机分为MI/RI组、假手术组、黄连碱低剂量组(黄连碱-L组,50 mg/kg黄连碱)、黄连碱中剂量组(黄连碱-M组,100 mg/kg黄连碱)、黄连碱高剂量组(黄连碱-H组,200 mg/kg黄连碱)及黄连碱-H+激活剂组(50 mg/kg黄连碱+25 mg/L JNK/p38MAPK通路激活剂茴香霉素),每组10只。除假手术组外,其余各组均进行冠状动脉结扎构建MI/RI大鼠模型,造模后,观察血流动力学参数左室内压最大上升(LVdp/dt_(max))、左室内压最大下降速率(LVdp/dt_(min))、收缩压以及舒张末压变化;采集大鼠腹部主动脉血,评估心肌损伤程度指标肌酸激酶同工酶(CK-MB)及乳酸脱氢酶(LDH)含量;分离心肌组织,检测心肌组织病理学变化、细胞凋亡、炎性因子[肿瘤坏死因子-α(TNF-α)、白细胞介素-6(IL-6)]水平及JNK/p38MAPK通路相关蛋白表达。结果:与假手术组比较,MI/RI组存在大量炎性细胞浸润、组织结构紊乱,病理损伤严重,LVdp/dt_(max)、LVdp/dt_(min)、收缩压均降低,但凋亡率、舒张压、LDH、CK-MB、TNF-α、IL-6含量、p-JNK/JNK、p-p38MAPK/p38MAPK表达增加(P<0.05);与MI/RI组比较,黄连碱-L组、黄连碱-M组、黄连碱-H组病理损伤得到改善,LVdp/dt_(max)、LVdp/dt_(min)、收缩压均增加,凋亡率、舒张压、LDH、CK-MB、TNF-α、IL-6含量、p-JNK/JNK、p-p38MAPK/p38MAPK表达降低(P<0.05);与黄连碱-H组比较,黄连碱-H+激活剂组病理损伤进一步加剧,LVdp/dt_(max)、LVdp/dt_(min)、收缩压均降低,但凋亡率、舒张压、LDH、CK-MB、TNF-α、IL-6含量、p-JNK/JNK、p-p38MAPK/p38MAPK表达增加(P<0.05)。结论:黄连碱预处理可通过抑制JNK/p38MAPK通路减轻MI/RI大鼠心肌损伤。 展开更多
关键词 心肌缺血再灌注 心肌损伤 黄连碱 c-Jun氨基末端激酶/促分裂素原活化蛋白激酶信号通路 实验研究
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Effect of phosphorylation of MAPK and Stat3 and expression of c-fos and c-jun proteins on hepatocarcinogenesis and their clinical significance 被引量:76
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作者 De Yun Feng Hui Zheng +1 位作者 Yi Tan Rui Xue Cheng Department of Pathology, Hunan Medical University, Changsha 410078, Hunan Province, China New England Biolab, MA, USA 《World Journal of Gastroenterology》 SCIE CAS CSCD 2001年第1期33-36,共4页
AIM To study the effect of phosphorylation ofMAPK and Stat3 and the expression of c-fos andc-jun proteins on hepatocellular carcinogenesisand their clinical significance.METHODS SP immunohistochemistry was usedto dete... AIM To study the effect of phosphorylation ofMAPK and Stat3 and the expression of c-fos andc-jun proteins on hepatocellular carcinogenesisand their clinical significance.METHODS SP immunohistochemistry was usedto detect the expression of p42/44MAPK, p-Stat3,c-fos and c-jun proteins in 55 hepatocellularcarcinomas (HCC) and their surrounding livertissues.RESULTS The positive rates and expressionlevels of p42/44MAPK, p-Stat3, c-fos and c-junproteins in HCCs were significantly higher thanthose in pericarcinomatous liver tissues (PCLT).A positive correlation was observed between theexpression of p42/44MAPK and c-fos proteins, andbetween p-Stat3 and c-jun, but there was nosignificant correlation between p42/44MAPK and p-Stat3 in HCCs and their surrounding livertissues.CONCLUSION The abnormalities of Ras/Rat/MAPK and JAKs/ Stat3 cascade reaction maycontribute to malignant transformation ofhepatocytes. Hepatocytes which are positive forp42/ 44MAPK, c-fos or c-jun proteins may bepotential malignant pre-cancerous cells.Activation of MAPK and Stat3 proteins may be anearly event in hepatocellular carcinogenesis. 展开更多
关键词 liver neoplasms mitogen-activated protein kinaseS signal transduction TRANS-ACTIVATORS ONCOGENES immunohistochemistry PRECANCEROUS conditions
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Mnk kinase pathway: Cellular functions and biological outcomes 被引量:17
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作者 Sonali Joshi Leonidas C Platanias 《World Journal of Biological Chemistry》 CAS 2014年第3期321-333,共13页
The mitogen-activated protein kinase(MAPK) interacting protein kinases 1 and 2(Mnk1 and Mnk2) play important roles in controlling signals involved in mRNA translation. In addition to the MAPKs(p38 or Erk), multiple st... The mitogen-activated protein kinase(MAPK) interacting protein kinases 1 and 2(Mnk1 and Mnk2) play important roles in controlling signals involved in mRNA translation. In addition to the MAPKs(p38 or Erk), multiple studies suggest that the Mnk kinases can be regulated by other known kinases such as Pak2 and/or other unidentified kinases by phosphorylation of residues distinct from the sites phosphorylated by the MAPKs. Several studies have established multiple Mnk protein targets, including PSF, heterogenous nuclear ribonucleoprotein A1, Sprouty 2 and have lead to the identification of distinct biological functions and substrate specificity for the Mnk kinases. In this review we discuss the pathways regulating the Mnk kinases, their known substrates as well as the functional consequences of engagement of pathways controlled by Mnk kinases. These kinases play an important role in mRNA translation via their regulation of eukaryotic initiation factor 4E(eIF4E) and their functions have important implications in tumor biology as well as the regulation of drug resistance to anti-oncogenic therapies. Other studies have identified a role for the Mnk kinases in cap-independent mRNA translation, suggesting that the Mnk kinases can exert important functional effects independently of the phosphorylation of eIF4 E. The role of Mnk kinases in inflammation and inflammationinduced malignancies is also discussed. 展开更多
关键词 Mnk kinaseS mRNA translation mitogenactivated protein kinase signaling EIF4E PHOSPHORYLATION Drug resistance CYTOKINE production CYTOKINE signaling
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RAS signaling pathways, mutations and their role in colorectal cancer 被引量:8
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作者 Kypros Zenonos Katy Kyprianou 《World Journal of Gastrointestinal Oncology》 SCIE CAS 2013年第5期97-101,共5页
Two of the main cellular pathways in which the RAS protein operates are the mitogen-activated protein kinases (MAPK) and phosphoinositide-3 kinase (PI3K) pathways. In a normal cell, these are important in controlling ... Two of the main cellular pathways in which the RAS protein operates are the mitogen-activated protein kinases (MAPK) and phosphoinositide-3 kinase (PI3K) pathways. In a normal cell, these are important in controlling several functions, such as cell growth and survival. It becomes self-evident that these events will be disrupted in a malignant cell with a deregulated MAPK or PI3K pathway. Mutations in genes involved in these pathways and interacting with RAS, as well as RAS itself will be discussed. The second part of this review concentrates on how crucial RAS signaling is in colorectal cancer progression, with references to treatment response and prognosis when RAS or other related mutations are present. 展开更多
关键词 Genes RAS COLORECTAL NEOPLASMS Thera-peutics mitogen-activated protein kinase signaling system
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Regulation of Hepatitis C Virus Replication and Gene Expression by the MAPK-ERK Pathway 被引量:2
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作者 Rongjuan Pei Xiaoyong Zhang +4 位作者 Song Xu Zhongji Meng Michael Roggendorf Mengji Lu Xinwen Chen 《Virologica Sinica》 SCIE CAS CSCD 2012年第5期278-285,共8页
The mitogen activated protein kinases-extracellular signal regulated kinases (MAPK-ERK) pathway is involved in regulation of multiple cellular processes including the cell cycle. In the present study using a Huh7 ce... The mitogen activated protein kinases-extracellular signal regulated kinases (MAPK-ERK) pathway is involved in regulation of multiple cellular processes including the cell cycle. In the present study using a Huh7 cell line Conl with an HCV replicon, we have shown that the MAPK-ERK pathway plays a significant role in the modulation of HCV replication and protein expression and might influence IFN-a signalling. Epithelial growth factor (EGF) was able to stimulate ERK activation and decreased HCV RNA load while a MAPK-ERK pathway inhibitor U0126 led to an elevated HCV RNA load and higher NS5A protein amounts in Conl cells. It could be further demonstrated that the inhibition of the MAPK-ERK pathway facilitated the translation directed by the HCV internal ribosome entry site. Consistently, a U0126 treatment enhanced activity of the HCV reporter replicon in transient transfeetion assays. Thus, the MAPK-ERK pathway plays an important role in the regulation of HCV gene expression and replication. In addition, cyclin-dependent kinases (CDKs) downstream of ERK may also be involved in the modulation of HCV replication since roscovitine, an inhibitor of CDKs had a similar effect to that of U0126. Modulation of the cell cycle progression by cell cycle inhibitor or RNAi resulted consistently in changes of HCV RNA levels. Further, the replication of HCV replicon in Conl cells was inhibited by IFN-~z. The inhibitory effect of IFN-CZ could be partly reversed by pre-incubation of Con-1 cells with inhibitors of the MAPK-ERK pathway and CDKs. It could be shown that the MAPK-ERK inhibitors are able to partially modulate the expression of interferon-stimulated genes. 展开更多
关键词 Hepatitis C Virus (HCV) mitogen activated protein ldnases-extracellular signal regulated kinase mapk-ERK) Cell cycleprogression
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Neuroprotective Effects of Raloxifene on Aβ_(25-35)-induced Damages in PC12 Cells via Mitogen-activated Protein Kinase Signaling Pathway 被引量:1
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作者 Xue DAI Jie WU +3 位作者 Xue-ping SUN Li GAO Yu-gui CUI Jia-yin LIU 《Journal of Reproduction and Contraception》 CAS 2012年第1期1-16,共16页
Objective To investigate the neuroprotective effects and the mechanism of this protection of raloxifene (RLX), a selective estrogen receptor modulator.Methods MTT assay and flow cytometry with annexin V-FITC/PI stai... Objective To investigate the neuroprotective effects and the mechanism of this protection of raloxifene (RLX), a selective estrogen receptor modulator.Methods MTT assay and flow cytometry with annexin V-FITC/PI staining were performed to evaluate the neuroprotective effects of RLX on Aβ25-35-induced toxicity. The potential mechanisms were studied by Western blotting in cultured rat pheochromocytoma cells (PC12 cells).Results RLX(1 000 nmol/L), in combination with Aβ25-35 (30 llmol/L), increased the cell viability (P 〈0.001), and reduced the number of apoptotic cells (P 〈0.05). RLX attenuated Aβ25-35-induced loss of △ψm (P 〈0.01). The changing of △ψm was similar to the variation of apoptosis. PD98059 (inhibitor of ERK1/2) inhibited the effects of RLX on cell viability and phosphorylation of cleaved caspase-9. No significant difference of cell viability or phosphorylation of cleaved caspase-9 had been found when PC12 cells were incubated with SB203580 (inhibitor of p38MAPK) or SP600125 (inhibitor of JNK). Afl25.35 induced a time-dependent phosphorylation of p38MAPK and JNK. In PC12 cells treated solely with RLX, ERK1/2 was activated (P〈0.01). In PC12 cells treated with Aβ25-35 and RLX, Aβ2545-induced phosphorylation of p38MAPK and JNK were inhibited (P〈0.01 and P〈0.001, respectively).Conclusion RLX inhibited Af125.35-induced cell apoptosis by activating the ERK1/2 pathway in PC12 cells. RLX also attenuated Aβ25-35-induced activation of p38MAPK and JNK. The mitochondria pathway Was involved in this inhibitory effect. 展开更多
关键词 RALOXIFENE AΒ25-35 APOPTOSIS mapk signaling pathway Alzheimer's disease mitogen-activated protein kinase mapk
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MAPK在植物响应逆境胁迫中的作用 被引量:1
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作者 张鑫苗 伍国强 魏明 《草业学报》 CSCD 北大核心 2024年第1期182-197,共16页
丝裂原活化蛋白激酶(MAPK)是一类高度保守的丝氨酸/苏氨酸(Ser/Thr)蛋白激酶,广泛存在于真核生物中级联反应途径。植物MAPK具有相对保守的11个亚结构域,均为Ser/Thr蛋白激酶发挥其催化作用所必需的元件,其表达受活性氧、一氧化氮、激素... 丝裂原活化蛋白激酶(MAPK)是一类高度保守的丝氨酸/苏氨酸(Ser/Thr)蛋白激酶,广泛存在于真核生物中级联反应途径。植物MAPK具有相对保守的11个亚结构域,均为Ser/Thr蛋白激酶发挥其催化作用所必需的元件,其表达受活性氧、一氧化氮、激素等调控。MAPK可磷酸化多种底物,包括转录因子、蛋白激酶和细胞骨架相关蛋白等,在调控植物响应逆境(盐分、干旱、极端温度、重金属等)胁迫中起重要作用。本研究对植物MAPK家族的发现、分类与结构、调控机制及其响应各种非生物胁迫等方面的研究成果加以综述,并对未来研究方向进行展望,以期为农作物抗逆性遗传改良提供理论依据和基因资源。 展开更多
关键词 丝裂原活化蛋白激酶 调控机制 非生物胁迫 mapk级联途径 磷酸化
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