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Effects of invigorating-spleen and anticancer prescription on extracellular signal-regulated kinase/mitogen-activated protein kinase signaling pathway in colon cancer mice model
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作者 Wei Wang Jing Wang +2 位作者 Xiu-Xiu Ren Hai-Long Yue Zheng Li 《World Journal of Gastrointestinal Oncology》 SCIE 2024年第11期4468-4476,共9页
BACKGROUND Colon cancer(CC)is one of the most common malignant tumors in the gastrointestinal system.Overall,CC had the third highest incidence but the second highest mortality rate globally in 2020.Nowadays,CC is mai... BACKGROUND Colon cancer(CC)is one of the most common malignant tumors in the gastrointestinal system.Overall,CC had the third highest incidence but the second highest mortality rate globally in 2020.Nowadays,CC is mainly treated with capecitabine chemotherapy regimen,supplemented by radiotherapy,immunotherapy and targeted therapy,but there are still limitations,so Chinese medicine plays an important role.AIM To investigate the effects of invigorating-spleen and anticancer prescription(ISAP)on body weight,tumor inhibition rate and expression levels of proteins in extracellular-signal-regulated kinase(ERK)/mitogen-activated protein kinase(MAPK)signaling pathway in CC mice model.METHODS The CC mice model were established and the mice were randomly divided into 5 groups,including the control group,capecitabine group,the low-dose,mediumdose and high-dose groups of ISAP,with 8 mice in each group,respectively.After 2 weeks of intervention,the body weight and tumor inhibition rate of mice were observed,and the expression of RAS,ERK,phosphorylated ERK(p-ERK),C-MYC and matrix metalloproteinase 2(MMP2)proteins in the tissues of tumors were detected.RESULTS Compared with the control group,the differences of body weight before and after treatment was much smaller in the groups of ISAP,with the smallest difference in the high-dose group of ISAP,while the capecitabine group had the greatest difference,indicating ISAP had a significant inhibiting effect on the growth of transplanted tumor in mice.The expression of RAS protein was decreased in the low-and medium-dose groups of ISAP,and the change of p-ERK was significant in the medium-and high-dose groups of ISAP.MMP2 protein expression was significantly decreased in both the low-dose and medium-dose groups of ISAP.There were no significant changes in ERK in the ISAP group compared to the capecitabine group,while RAS,MMP2,and C-MYC protein expression were reduced in the ISAP group.The expression level of C-MYC protein decreased after treated with ISAP,and the decrease was the most significant in the medium-dose group of ISAP.CONCLUSION ISAP has a potential inhibiting effect on transplanted tumor in mice,and could maintain the general conditions,physical strength and body weight of mice.The expression levels of RAS,p-ERK,MMP2 and c-myc were also decreased to a certain extent.By inhibiting the expression of upstream proteins,the expression levels of downstream proteins in ERK/MAPK signaling pathway were significantly decreased.Therefore,it can be concluded that ISAP may exert an anti-tumor effect by blocking the ERK/MAPK signaling pathway and inhibiting the expression of MMP2 and c-myc proteins. 展开更多
关键词 Colon cancer Invigorating-spleen and anticancer formula extracellular signal-regulated kinase/mitogen-activated protein kinase signaling pathway Mice model C-MYC
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N-methyl-D-aspartate receptors mediate diphosphorylation of extracellular signal-regulated kinases through Src family tyrosine kinases and Ca^2+/calmodulin-dependent protein kinase Ⅱ in rat hippocampus after cerebral ischemia 被引量:7
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作者 吴辉文 李洪福 郭军 《Neuroscience Bulletin》 SCIE CAS CSCD 2007年第2期107-112,共6页
Objective: Extracellular signal-regulated kinases (ERKs) can be activated by calcium signals. In this study, we investigated whether calcium-dependent kinases were involved in ERKs cascade activation after global c... Objective: Extracellular signal-regulated kinases (ERKs) can be activated by calcium signals. In this study, we investigated whether calcium-dependent kinases were involved in ERKs cascade activation after global cerebral ischemia. Methods Cerebral ischemia was induced by four-vessel occlusion, and the calcium-dependent proteins were detected by immunoblot. Results Lethal-simulated ischemia significantly resulted in ERKs activation in N-methyl-D-aspartate (NMDA) receptor-dependent manner, accompanying with differential upregulation of Src kinase and Ca^2+/calmodulin-dependent protein kinase Ⅱ (CaMKⅡ) activities. With the inhibition of Src family tyrosine kinases or CaMKⅡ by administration of PP2 or KN62, the phosphorylation of ERKs was impaired dramatically during post-ischemia recovery. However, ischemic challenge also repressed ERKs activity when Src kinase was excessively activated. Conclusions Src family tyrosine kinases and CaMKⅡ might be involved in the activation of ERKs mediated by NMDA receptor in response to acute ischemic stimuli in vivo, but the intense activation of Src kinase resulted from ischemia may play a reverse role in the ERKs cascade. 展开更多
关键词 cerebral ischemia extracellular signal-regulated kinases NMDA receptors Src family tyrosine kinases CaMKⅡ
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Downregulation of Aquaporin 4 Expression through Extracellular Signal-regulated Kinases1/2 Activation in Cultured Astrocytes Following Scratch-injury 被引量:10
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作者 SHI Zhong Fang ZHAO Wei Jiang +3 位作者 XU Li Xin DONG Li Ping YANG Shao Hua YUAN Fang 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 2015年第3期199-205,共7页
Objective To investigate the role of extracellular signal-regulated kinase1/2(ERK1/2) pathway in the regulation of aquaporin 4(AQP4) expression in cultured astrocytes after scratch-injury. Methods The scratch-inju... Objective To investigate the role of extracellular signal-regulated kinase1/2(ERK1/2) pathway in the regulation of aquaporin 4(AQP4) expression in cultured astrocytes after scratch-injury. Methods The scratch-injury model was produced in cultured astrocytes of rat by a 10-μL plastic pipette tip. The morphological changes of astrocytes and lactate dehydrogenase(LDH) leakages were observed to assess the degree of scratch-injury. AQP4 expression was detected by immunofluorescence staining and Western blot, and phosphorylated-ERK1/2(p-ERK1/2) expression was determined by Western blot. To explore the effect of ERK1/2 pathway on AQP4 expression in scratch-injured astrocytes, 10 μmol/L U0126(ERK1/2 inhibitor) was incubated in the medium at 30 min before the scratch-injury in some groups. Results Increases in LDH leakage were observed at 1, 12, and 24 h after scratch-injury, and AQP4 expression was reduced simultaneously. Decrease in AQP4 expression was associated with a significant increase in ERK1/2 activation. Furthermore, pretreatment with U0126 blocked both ERK1/2 activation and decrease in AQP4 expression induced by scratch-injury. Conclusion These results indicate that ERK1/2 pathway down-regulates AQP4 expression in scratch-injured astrocytes, and ERK1/2 pathway might be a novel therapeutic target in reversing the effects of astrocytes that contribute to traumatic brain edema. 展开更多
关键词 Astrocytes Aquaporin 4 Scratch-injury extracellular signal-regulated kinases1/2
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Time-dependent effects of electroacupuncture at the Ren channel on extracellular signal-regulated kinases 1/2 expression in focal cerebral ischemia rats
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作者 Zhuoxin Yang Lihong Diao +5 位作者 Haibo Yu Wenshu Luo Ling Wang Min Pi Xiaodan Rao Junhua Peng 《Neural Regeneration Research》 SCIE CAS CSCD 2008年第1期44-48,共5页
BACKGROUND: The onset of focal cerebral ischemia activates extracellular signal-regulated kinases 1 and 2, regulates cell cycle, promotes cell proliferation and differentiation, and affects the normal stage and funct... BACKGROUND: The onset of focal cerebral ischemia activates extracellular signal-regulated kinases 1 and 2, regulates cell cycle, promotes cell proliferation and differentiation, and affects the normal stage and function of brain cells. OBJECTIVE: To observe the effects of electroacupuncture at the Ren channel on extracellular signal-regulated kinases 1/2 expression in the lateral cerebral ventricle wall of rats with focal cerebral ischemia. The effects were analyzed at different time points after intervention. DESIGN: Randomized controlled study. SETTING: Department of Anatomy, Sun Yat-Sen University. MATERIALS: A total of 60 healthy adult male Wistar rats weighing (250±10) g were provided by the Experimental Animal Center, Medical College of Sun Yat-Sen University. The animal experiment was conducted with confirmed consent by the local ethics committee. The GB6805-Ⅱ electric acupuncture apparatus was provided by Shanghai Medical Equipment High-techno Company. METHODS: The experiment was performed at the Laboratory of Anatomy, Sun Yat-Sen University, from February to July 2007. All experimental animals were randomly divided into the following groups: normal group (n = 6), sham operation group (n = 18), model group (n = 18), and electroacupuncture group (n = 18). Middle cerebral artery occlusion (MCAO) was performed in the model group and electroacupuncture group. Zea Longa's grading standard was used to assess neurological impairment after reperfusion; animals whose grades were between l and 4 were included in this study. The normal control group was not exposed to MCAO. In sham operation animals, the right common carotid artery (CCA) was isolated, and the external carotid artery (ECA) was damaged, but no embolism was induced. The electroacupuncture group was given acupuncture on the second day after surgery. The acupoint locations were chosen according to Experimental Acupuncture (People's Publishing House; 1997; First Edition). The Chengjiang, Qihai, and Guanyuan acupoints were labeled and connected to a G6805 electroacupuncture apparatus with sparse-dense waves (sparse waves were 30 Hz, dense waves were 100 Hz), with a frequency of 6-15 V. The duration was 20 minutes. Two days after surgery, the model and sham operation groups were placed with their backs on the operating table, but they received no acupuncture. However, the normal group received acupuncture. The experimental animals under anesthesia were sacrificed on days 7, 14, and 28 post-surgery. Western blot analysis was used to measure expression of extracellular signal-regulated kinases 1/2 in the inferior region of the lateral cerebral ventricle wall. Expression was measured in the normal group at time points corresponding to the sham operation group. MAIN OUTCOME MEASURES: Expression of extracellular signal-regulated kinases 1/2 in the inferior region of the lateral cerebral ventricle wall at different time points after intervention. RESULTS: All 60 rats were included in the final analysis, without any loss. Seven days after MCAO, there was no significant difference in extracellular signal-regulated kinases 1/2 expression in the electroacupuncture group compared to the model group (P 〉 0.05). However, extracellular signal-regulated kinases 1/2 expression significantly increased in the model group at 14 and 28 days after treatment (P 〈 0.05). CONCLUSION: Electroacupuncture at the Ren channel can enhance extracellular signal-regulated kinasesl/2 expression in the inferior region of the lateral cerebral ventricle wall of rats with focal cerebral ischemia. However, this effect is not apparent until 14 days after electroacupuncture intervention. 展开更多
关键词 cerebral ischemia ELECTROACUPUNCTURE Ren channel extracellular signal-regulated kinases 1/2middle cerebral artery occlusion
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Dynamic expression of extracellular signal-regulated kinase in rat liver tissue during hepatic fibrogenesis 被引量:16
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作者 Xiao-Lan Zhang Jin-Ming Liu Chang-Chun Yang Yi-Lin Zheng Li Liu Zhan-Kui Wang Hui-Qing Jiang 《World Journal of Gastroenterology》 SCIE CAS CSCD 2006年第39期6376-6381,共6页
AIM: To investigate whether extracellular signal-regulated kinase 1 (ERK1) is activated and associated with hepatic stellate cell (HSC) proliferation in fibrotic rat liver tissue.METHODS: Rat hepatic fibrosis wa... AIM: To investigate whether extracellular signal-regulated kinase 1 (ERK1) is activated and associated with hepatic stellate cell (HSC) proliferation in fibrotic rat liver tissue.METHODS: Rat hepatic fibrosis was induced by bile duct ligation (BDL). Histopathological changes were evalo uated by hernatoxylin and eosin staining, and Masson' s trichrorne method. ERK1 mRNA in rat liver tissue was determined by reverse transcription-polyrnerase chain reaction, while the distribution of ERK1 was assessed by irnrnunohistochernistry. ERK1 protein was detected by Western blotting analysis. The number of activated HSCs was quantified after alpha smooth muscle actin (α-MA) staining.RESULTS: With the development of hepatic fibrosis, the positive staining cells of α-SMA increased obviously, and mainly resided in the portal ducts. Fiber sepia and perisinuses were accompanied with proliferating bile ducts. The positive staining areas of the rat livers in model groups 1-4 wk after ligation of common bile duct (12.88% ± 2.63%, 22.65% ± 2.16%, 27.45% ± 1.86%, 35.25% ± 2.34%, respectively) were significantly larger than those in the control group (5.88% ± 1.46%, P 〈 0.01). With the development of hepatic fibrosis, the positive cells of ERK1 increased a lot, and were mainly distributed in portal ducts, fiber sepia around the bile ducts, vascular endothelial cells and perisinusoidal cells. Western blotting analysis displayed that the expression of ERK1 and ERK1 protein was up-regulated during the model course, and its level was the highest 4 wk after operation, being 3.9-fold and 7.2-fold higher in fibrotic rat liver than in controls. ERK1 mRNA was expressed in normal rat livers as well, which was up-regulated two days after BDL and reached the highest 4 wk after BDL. The expression of ERK1 was positively correlated with α-MA expression (r = 0.958, P 〈 0.05).CONCLUSION: The expression of ERK1 protein and mRNA is greatly increased in fibrotic rat liver tissues, which may play a key role in HSC proliferation and hepatic fibrogenesis. 展开更多
关键词 extracellular signal-regulated kinase Hepatic fibrosis Hepatic stellate cells PROLIFERATION
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Influence of Ren and Du meridian electro-acupuncture on neural stem cell proliferation and extracellular signal-regulated kinase pathway in a rat model of focal cerebral ischemia injury 被引量:14
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作者 Wenshu Luo Haibo Yu +3 位作者 Zhuoxin Yang Min Pi Lihong Diao Xiaodan Rao 《Neural Regeneration Research》 SCIE CAS CSCD 2010年第6期433-438,共6页
BACKGROUND: Studies have shown that electro-acupuncture at the Ren meridian could improve proliferation of subventricular zone neural stem cells in cerebral-ischemic rats. However, there are few reports on the influe... BACKGROUND: Studies have shown that electro-acupuncture at the Ren meridian could improve proliferation of subventricular zone neural stem cells in cerebral-ischemic rats. However, there are few reports on the influence of electro-acupuncture at the Du meridian on neural stem cell proliferation. OBJECTIVE: To observe the influence of electro-acupuncture at Ren and Du meridians on neural stem cell proliferation in the subventricular zone and altered signal transduction in cerebral ischemia rats. DESIGN, TIME AND SETTING: A randomized, controlled, animal experiment was performed at the Laboratory of Human Anatomy, Medical College of Sun Yat-sen University from May 2006 to February 2008. MATERIALS: Mouse anti-rat bromodeoxyuridine (BrdU) monoclonal antibody was provided by Sigma, USA; mouse anti-rat nestin monoclonal antibody and extracellular signal-regulated protein kinase (ERK) specific inhibitor PD98059 were provided by Calbiochem, Germany; acupuncture needle was provided by Suzhou Acupuncture Supplies, China. METHODS: A total of 126 rats were randomly assigned to four groups: model (n = 36), Du meridian (n = 36), Ren/Du meridian (n = 36), and Ren/Du meridian + PD98059 (n = 18). Rats in the Ren/Du meridian + PD98059 group were observed on days 7 (n = 6) and 14 (n = 12) after cerebral ischemia injury. Rats in the model, Du meridian, and Ren/Du meridian groups were observed on days 7, 14, and 28 after cerebral ischemia injury, with 12 rats per group at each time point. Thread occlusion was used to establish middle cerebral artery occlusion models. Electro-acupuncture was performed at Renzhong (DU 26) and Baihui (DU 20) acupoints in the Du meridian group, as well as Chengjiang (RN 24), Guanyuan (RN 4), Renzhong, and Baihuiacupoints in the Ren/Du meridian and Ren/Du meridian + PD98059 groups 2 days after model establishment. In addition, electro-acupuncture stimulation with disperse-dense waves was performed, with 30 Hz disperse wave, 100 Hz dense wave, and 5 V intensity for 20 minutes. Rats in the Ren/Du meridian + PD98059 group were treated with 0.2 pg PD98059 injection into the subventricular zone, 2 pL per rat. Rats in the model group were not treated with electro-acupuncture. MAIN OUTCOME MEASURES: BrdU/nestin immunofluorescent staining was used to detect proliferating neural stem cells in the subventricular zone of cerebral ischemia rats; Western blot was used to determine phosphorylated ERK1 and 2 (pERK1/2) expression in the subventricular zone. RESULTS: On days 14 and 28 after cerebral ischemia, there were significantly more BrdU-positive and BrdU/nestin-positive cells in the Ren/Du meridian group compared with the Du meridian group (P 〈 0.05). PD98059 decreased the number of BrdU-positive and BrdU/nestin-positive cells induced by electro-acupuncture at the/:ten and Du meridians (P 〈 0.05). On days 7, 14, and 28 after treatment, pERK1/2 expression was significantly greater in the Du meridian and Ren/Du meridian groups compared with the model group (P 〈 0.05). The promoting effect of electro-acupuncture at Ren and Du meridians on ERK1/2 phosphorylation was superior to electro-acupuncture at the Du meridian alone on day 14 after model induction (P 〈 0.05). However, PD98059 completely abolished the promoting effect of electro-acupuncture at Ren/Du meridians on pERK1/2 expression (P 〈 0.05). CONCLUSION: Electro-acupuncture at Ren and Du meridians increased proliferation of subventricular zone neural stem cells, which was related to activation of the ERK pathway in a rat model of cerebral ischemia injury. 展开更多
关键词 cerebral ischemia ELECTRO-ACUPUNCTURE extracellular signal-regulated protein kinase middle cerebral artery occlusion brain injury neural regeneration cerebral infarction
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An experimental study of extracellular signal-regulated kinase and its interventional treatments in hepatic fibrosis 被引量:14
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作者 Jiang, Ming-De Zheng, Shu-Mei +6 位作者 Xu, Hui Zeng, Wei-Zheng Zhang, Yong Sun, Hao-Ping Wang, Yun-Xia Qin, Jian-Ping Wu, Xiao-Ling 《Hepatobiliary & Pancreatic Diseases International》 SCIE CAS 2008年第1期51-57,共7页
BACKGROUND: The pathogenesis of hepatic fibrosis and cirrhosis is still not fully understood. The extracellular signal-regulated kinase (ERK) pathway is involved in the regulation of cell proliferation and differentia... BACKGROUND: The pathogenesis of hepatic fibrosis and cirrhosis is still not fully understood. The extracellular signal-regulated kinase (ERK) pathway is involved in the regulation of cell proliferation and differentiation. The aim of this study was to investigate the effects of PD98059, a specific inhibitor of ERK, on the cell cycle, cell proliferation, secretion of type I collagen and expression of cyclin D1 mRNA, CDK4 mRNA and transforming growth factor-beta 1 (TGF-beta 1) mRNA in rat hepatic stellate cells (HSCs) stimulated by acetaldehyde. METHODS: Rat HSCs stimulated by acetaldehyde were incubated with PD98059 at different concentrations. The cell cycle was analysed by flow cytometry. Cell proliferation was assessed by the methyl thiazolyl tetrazolium colorimetric assay. The mRNA expression of cyclin D1, CDK4 and TGF-beta 1 was examined using the reverse transcriptase-polymerase chain reaction. Type I collagen in the culture medium was detected by enzyme-linked immunosorbent assay. RESULTS: 20, 50 and 100 mu mol/L PD98059 significantly inhibited the proliferation and provoked a G0/G1-phase arrest of acetaldehyde-induced HSCs in a dose-dependent manner. The secretion of type I collagen and the expression of cyclin D1, CDK4 and TGF-beta 1 mRNA in acetaldehyde-induced HSCs were markedly inhibited by 50 and 100 mu mol/L PD98059, respectively. CONCLUSIONS: The ERK pathway regulates the cell proliferation, secretion of type I collagen and the expression of TGF-beta 1 mRNA in rat HSCs stimulated by acetaldehyde, which is likely related to its regulative effect on the cell cycle. 展开更多
关键词 extracellular signal-regulated kinase hepatic stellate cell hepatic fibrosis
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Regulation of extracellular signal-regulated kinase 1/2 influences hippocampal neuronal survival in a rat model of diabetic cerebral ischemia 被引量:10
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作者 Yaning Zhao Jianmin Li +4 位作者 Qiqun Tang Pan Zhang Liwei Jing Changxiang Chen Shuxing Li 《Neural Regeneration Research》 SCIE CAS CSCD 2014年第7期749-756,共8页
Activation of extracellular signal-regulated kinase 1/2 has been demonstrated in acute brain ischemia. We hypothesized that activated extracellular signal-regulated kinase 1/2 can protect hippocampal neurons from inju... Activation of extracellular signal-regulated kinase 1/2 has been demonstrated in acute brain ischemia. We hypothesized that activated extracellular signal-regulated kinase 1/2 can protect hippocampal neurons from injury in a diabetic model after cerebral ischemia/reperfusion. In this study, transient whole-brain ischemia was induced by four-vessel occlusion in normal and diabetic rats, and extracellular signal-regulated kinase 1/2 inhibitor (U0126) was administered into diabetic rats 30 minutes before ischemia as a pretreatment. Results showed that the number of surviving neurons in the hippocampal CA1 region was reduced, extracellular signal-regulated kinase 1/2 phosphorylation and KuT0 activity were decreased, and pro-apoptotic Bax expression was upregulated after intervention using U0126. These findings demonstrate that inhibition of extracellular signal-regulated kinase 1/2 activity aggravated neuronal loss in the hippocampus in a diabetic rat after cerebral ischemia/reperfusion, further decreased DNA repairing ability and ac- celerated apoptosis in hippocampal neurons. Extracellular signal-regulated kinase 1/2 activation plays a neuroprotective role in hippocampal neurons in a diabetic rat after cerebral ischemia/ reperfusion. 展开更多
关键词 nerve regeneration brain injury cerebral ischemia/reperfusion DNA dependent proteinkinase extracellular signal-regulated kinase Bax apoptosis HIPPOCAMPUS neural regeneration
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Pterygium epithelium abnormal differentiation related to activation of extracellular signal-regulated kinase signaling pathway in vitro 被引量:5
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作者 Juan Peng Xiang-Yin Sha +2 位作者 Yi Liu Rui-Ming Yang Ye Wen 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2015年第6期1118-1125,共8页
AIMTo investigate whether the abnormal differentiation of the pterygium epithelium is related to the extracellular signal-regulated kinase (ERK) signaling pathway in vitro.METHODSThe expression levels of phosphorylate... AIMTo investigate whether the abnormal differentiation of the pterygium epithelium is related to the extracellular signal-regulated kinase (ERK) signaling pathway in vitro.METHODSThe expression levels of phosphorylated ERK (P-ERK), keratin family members including K19 and K10 and the ocular master control gene Pax-6 were measured in 16 surgically excised pterygium tissues and 12 eye bank conjunctiva. In colony-forming cell assays, the differences in clone morphology and in K10, K19, P-ERK and Pax-6 expression between the head and body were investigated. When cocultured with the ERK signaling pathway inhibitor PD98059, the changes in clone morphology, colony-forming efficiency, differentiated marker K10, K19 and Pax-6 expression and P-ERK protein expression level were examined by immunoreactivity and Western blot analysis.RESULTSThe expression of K19 and Pax-6 decreased in the pterygium, especially in the head. No staining of K10 was found in the normal conjunctiva epithelium, but it was found to be expressed in the superficial cells in the head of the pterygium. Characteristic upregulation of P-ERK was observed by immunohistochemistry. The clone from the head with more differentiated cells in the center expressed more K10, and the clone from the body expressed more K19. The P-ERK protein level increased in the pterygium epithelium compared with conjunctiva and decreased when cocultured with PD98059. The same medium with the ERK inhibitor PD98059 was more effective in promoting clonal growth than conventional medium with 3T3 murine feeder layers. It was observed that the epithelium clone co-cultured with the inhibitor had decreased K10 expression and increased K19 and Pax-6 expression.CONCLUSIONWe suggest ERK signaling pathway activation might play a role in the pterygium epithelium abnormal differentiation. 展开更多
关键词 abnormal differentiation epithelial cells PTERYGIUM extracellular signal-regulated kinase signaling pathway in vitro
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Extracellular signal-regulated kinase, substance P and neurokinin-1 are involved in the analgesic mechanism of herb-partitioned moxibustion 被引量:8
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作者 Zhi-yuan Li Yan-ting Yang +8 位作者 Jue Hong Dan Zhang Xiao-fei Huang Li-jie Wu Huan-gan Wu Zheng Shi Jie Liu Yi Zhu Xiao-peng Ma 《Neural Regeneration Research》 SCIE CAS CSCD 2017年第9期1472-1478,共7页
Herb-partitioned moxibustion can effectively mitigate visceral pain, a major symptom in inflammatory bowel disease, but the analgesic lnechanism is still unclear. Moreover, extracellular signal-regulated kinase, subst... Herb-partitioned moxibustion can effectively mitigate visceral pain, a major symptom in inflammatory bowel disease, but the analgesic lnechanism is still unclear. Moreover, extracellular signal-regulated kinase, substance P, and neurokinin-1 are involved in formation of central hyperalgesia. Thus, we postulated that the analgesic effect of herb-partitioned moxibustion may be associated with these factors. Accordingly, in this study, we established an inflammatory bowel disease visceral pain model in rat by enema with a mixed solution of 5% trinitrobenzenesulfonic acid and 50% ethanol. Bilateral Tianshu (ST25) and Qihai (CV6) points were selected for herb-partitioned moxi- bustion. Our results showed that herb-partitioned moxibustion improved visceral pain and down-regulated extracellular signal-regulated kinase, substance P, and neurokinin-1 protein and mRNA expression in dorsal root ganglia. These results indicate that down-regulation of extracellular signal-regulated kinase, substance E and neurokinin-1 protein and mRNA may be a central mechanism for the analgesic effect of herb-partitioned moxibustion. 展开更多
关键词 nerve regeneration inflammatory bowel disease visceral pain herb-partitioned moxibustion analgesic effect Tianshu (ST25) Qihai (CV6) dorsal root ganglion extracellular signal-regulated kinase substance P neurokinin-I neural regeneration
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Effect of extracellular signal-regulated kinase and nitric oxide on compressive neuralgia formation and maintenance 被引量:3
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作者 Tongwei Yang Xuesong Song +2 位作者 Ping Wang Chunxi Wang Baoshun Lu 《Neural Regeneration Research》 SCIE CAS CSCD 2010年第10期757-763,共7页
BACKGROUND: Previous studies have shown that extracellular signal-regulated kinase 1/2 (ERK1/2) and nitric oxide activation play a pivotal role in central sensitization and long-term neuronal plasticity induced by ... BACKGROUND: Previous studies have shown that extracellular signal-regulated kinase 1/2 (ERK1/2) and nitric oxide activation play a pivotal role in central sensitization and long-term neuronal plasticity induced by noxious stimulation. However, their effects on compressive neuralgia formation and maintenance remain poorly understood.OBJECTIVE: To investigate effects of the specific inhibitor of ERK1/2 signal pathway U0126 on neuronal nitric oxide synthase (nNOS) expression in the dorsal horn of the spinal cord in a compressive neuralgia rat model.DESIGN, TIME AND SETTING: A randomized, controlled experiment was performed at the Institute of Otolaryngology, Head and Neck Surgery, First Hospital of Jilin University from July 2008 to March 2009.MATERIALS: U0126 (Bio-Mol, USA) was used in this study.METHODS: A total of 84 rats were randomly assigned to two groups. In the first part of the experiment, 24 rats were used for behavioral testing, and they were randomly assigned to three sub-groups (n =8): U0126, dimethyl sulfoxide (DMSO) and model control. In the second part of the experiment, 60 rats were used for immunofluorescence and Western blot analysis, and they were randomly assigned to six sub-groups (n = 10): sham surgery, model control, U0126 post-injection at 0.5, 2, 12 and 24 hours. Neuropathic pain was produced by chronic compression to the dorsal root ganglion in rats from each sub-group. Rats in the U0126 group were administered a 5-ug U0126 intrathecal injection, and rats in the DMSO group were administered a 10-μL 5% DMSO intrathecal injection.MAIN OUTCOME MEASURES: Changes in mechanical and thermal hyperalgesia were observed using von Frey filaments and thermalqia stimular. Thermal and mechanical hyperalgesia were stimulated at different time points following intrathecal injection of U0126. nNOS activation and expression in the spinal cord dorsal horn were determined by immunofluorescence and Western blot analysis.RESULTS: Intrathecal injection of U0126 significantly attenuated chronic compression of dorsal root ganglion-induced mechanical and thermal hyperalgesia. Immunofluorescence staining results demonstrated that, compared to the sham surgery group, the number of nNOS-positive neurons was significantly increased in the injured spinal dorsal horn in the model control group (P〈0.01). However, compared to the model control group, there were significantly decreasing numbers of nNOS-positive neurons in the U0126 post-injection groups at 0.5-hour, 2-hour, and 12-hour (P〈0.05). Western blot analysis revealed similar results. CONCLUSION: Decreased activity in the ERK signal pathway resulted in down regulated nNOS expression in the dorsal horn of the spinal cord. These results suggested that ERK is involved in nitric oxide reaction to neuropathic pain. 展开更多
关键词 extracellular signal-regulated kinase nitric oxide synthase neuropathic pain SENSITIZATION HYPERALGESIA neural regeneration
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Dexamethasone suppresses DU145 cell proliferation and cell cycle through inhibition of the extracellular signal-regulated kinase 1 /2 pathway and cyclin D1 expression 被引量:3
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作者 Qing-Zhen Gao Jia-Ju Lu +3 位作者 Zi-Dong Liu Hui Zhang Shao-Mei Wang He Xu 《Asian Journal of Andrology》 SCIE CAS CSCD 2008年第4期635-641,共7页
Aim: To determine the mechanisms of glucocorticoids in inhibiting advanced prostate cancer growth. Methods: The cell proliferation and cell cycle of prostate cancer DU145 cells following dexamethasone treatment were... Aim: To determine the mechanisms of glucocorticoids in inhibiting advanced prostate cancer growth. Methods: The cell proliferation and cell cycle of prostate cancer DU145 cells following dexamethasone treatment were determined by proliferation assay and fluorescence-activated cell sorter. Western blot analysis was carried out to evaluate the effects of dexamethasone on phosphorylation of extracellular signal-regulated kinase (ERK)1/2 and expression of cyclin D1 in DU145 cells with or without glucocorticoid receptor (GR) antagonist RU486. Reverse transcription- polymerase chain reaction verified the expression of GR mRNA in DU145 cells. Results: Dexamethasone significantly inhibited DU 145 cell proliferation at the G0/G1 phase. Westem blot analysis showed a dramatic reduction of ERK1/2 activity and cyclin D1 expression in dexamethasone-treated cells. The decreased phosphorylation of ERK1/2 in dexamethasone-treated cells was attenuated by GR blockade. Additionally, the effects of dexamethasone in inhibiting cyclin D1 expression were altered by GR blockade. Conclusion: Dexamethasone suppresses DU145 cell proliferation and cell cycle, and the underlying mechanisms are through the inhibition of phosphorylation of ERK1/2 and cyclin D1 expression. The inhibition of ERK1/2 phosphorylation and cyclin D1 expression is attenuated by GR blockade, suggesting that GR regulates ERK1/2 and cyclin D1 pathways. These observations suggest that dexamethasone has a potential clinical application in prostate cancer therapy. 展开更多
关键词 DEXAMETHASONE prostate cancer extracellular signal-regulated kinase 1/2 cell cycle
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Neurotransmitter regulation of extracellular signal-regulated kinase expression following subarachnoid hemorrhage 被引量:2
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作者 Jinning Song Wenbo Wang Long Sui 《Neural Regeneration Research》 SCIE CAS CSCD 2010年第3期214-220,共7页
BACKGROUND: Very few studies have addressed neuronal injury in cerebral vasospasm and subarachnoid hemorrhage (SAH), and the role of neurotransmitters in the regulation of extracellular signal-regulated kinase 1/2 ... BACKGROUND: Very few studies have addressed neuronal injury in cerebral vasospasm and subarachnoid hemorrhage (SAH), and the role of neurotransmitters in the regulation of extracellular signal-regulated kinase 1/2 (ERK1/2) expression following SAH. OBJECTIVE: To analyze neurotransmitter regulation of ERK1/2 expression through the use of signal transduction, and to investigate cerebral injury mechanisms following SAH. DESIGN, TIME AND SETTING: A completely randomized grouping and controlled animal experiment was performed at the Experimental Center of Medical College of Xi'an Jiaotong University from March to December 2008. MATERIALS: Extraceliular signal-regulated ERK1/2 polyclonal antibody and streptavidin-peroxidase method kits were purchased from Beijing Biosynthesis Biotechnology, China; DAB kit was purchased from Zhongshan Golden Bridge Biotechnology, China; TUNEL kit was purchased from Promega, USA. METHODS: A total of 114 male, Sprague Dawley rats, aged 55-63 days old, were randomly assigned to five groups: SAH (n = 30), saline control (n = 30), puncture control (n = 30), normal control (n = 6), and neurotransmitter-treated (n = 18). The SAH model was established by twice injecting blood through the cisterna magna. The neurotransmitters-treated group was subdivided into three groups according to drugs injected into the lateral cerebral ventricle: acetylcholine chloride, norepinephrine, and saline, with six animals in each group. MAIN OUTCOME MEASURES: Rats from the SAH, saline control, and puncture control groups were respectively sacrificed at 6, 12, and 24 hours, as well as 3 and 5 days, with six rats at each time point. The normal control group rats were sacrificed at 6 hours, and the neurotransmitter group rats were sacrificed 3 days following neurotransmitter injection. Morphological cellular changes were observed by hematoxylin and eosin staining. Immunohistochemical SP method was used to detect expression of ERK1/2 in the cortex, and cortical apoptosis was detected using the TUNEL method. RESULTS: Neural tissue edema, apoptosis, and necrosis occurred in the cortex of the SAH group. ERK1/2-positive cells were first observed at 6 hours, peaked at 12 hours following SAH in the cortex, and gradually decreased thereafter. Cellular apoptosis was observed in the cortex at 6 hours and peaked at 24 hours following SAH. ERK1/2 distribution in the brain overlapped apoptotic cells to a great degree. The number of ERK1/2-positive and apoptotic cells was significantly greater in the SAH group compared with the three control groups (P 〈 0.05). Compared to the number of ERK1/2-positive cells in the saline-treated group, acetylcholine chloride treatment resulted in decreased ERK1/2 expression and apoptosis (P 〈 0.05). Norepinephrine resulted in increased ERK1/2 expression, but there was no significance in apoptosis compared to the saline-treated group (P 〉 0.05). CONCLUSION: Apoptosis was observed early in the rat cortex following SAH. In addition, ERK1/2 was expressed earlier than apoptosis. Acetylcholine chloride treatment resulted in decreased numbers of apoptotic cells following SAH, possibly by down-regulating ERK1/2 expression. 展开更多
关键词 extracellular signal-regulated kinase subarachnoid hemorrhage APOPTOSIS NEUROTRANSMITTERS brain injury neural regeneration
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OVER-EXPRESSION OF EXTRACELLULAR SIGNAL-REGULATED KINASE IN VASCULAR SMOOTH MUSCLE CELL OF HYPERTENSIVE RATS
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作者 Li Jing Jian-zhong Zhang +1 位作者 Yi-li Wang Feng-ying Guo 《Chinese Medical Sciences Journal》 CAS CSCD 2006年第1期36-40,共5页
Objective To investigate whether extracellular signal-regulated kinase (ERK1/2) was involved in changes of vascular smooth muscle cell (VSMC) under hypertension.Methods Two-kidney one clip Wistar hypertensive rats (WH... Objective To investigate whether extracellular signal-regulated kinase (ERK1/2) was involved in changes of vascular smooth muscle cell (VSMC) under hypertension.Methods Two-kidney one clip Wistar hypertensive rats (WHR) were sacrificed and their right kidneys were harvested 4 weeks after surgery.The spontaneously hypertensive rats (SHR) were divided into 4, 8, and 16 weeks old groups (SHR4w, SHR8w, and SHR16w), respectively.The control group were sham operated age-matched Wistar rats.Immunohistochemical technique and Western blotting were applied to study ERK1/2 protein expression in VSMC of the renal vascular trees in WHR, SHR, and control rats.Results Blood pressure in two-kidney one clip WHR obviously increased at one week after surgery, and reached to 198.00±33.00 mm Hg at the end of experiment, significantly higher than that in the control rats (P<0.01).Blood pressure in SHR4w (108.00±11.25 mm Hg) was similar to that in the controls.However, it rose to 122.25±21.75 mm Hg in SHR8w, and even up to 201.75±18.00 mm Hg in SHR16w, which were significantly higher than that of both the SHR4w and the controls (P<0.01).The rate and degree of glomerular fibrosis in WHR were significantly higher than controls (P<0.05).Hyaline degeneration of the afferent arterioles was found in WHR.In contrast, either fibrosis of glomerulus or hyaline degeneration of the arterioles or protein casts was not observed in SHR4w, SHR8w, and SHR16w.Immunohistochemical staining results showed expression of ERK1 was similar to that of ERK2.The positive rates of ERK2 staining in VSMC of afferent arterioles, interlobular, interlobar, and arcuate arteries in two-kidney one clip WHR were significantly higher (7.09%±1.75%, 14.57%±4.58%, 29.44%±7.35%, and 13.63%±3.85%, respectively) than that of the controls(P<0.01).The positive rates of ERK2 staining in VSMC at afferent arterioles, interlobular, interlobar, and arcuate arteries in SHR16w were significantly higher (12.09%±1.40%, 24.17%±6.92%, 32.44%±4.05%, and 18.61%±3.35%, respectively) than that of the controls (P<0.01), too.The expression of ERK1/2 protein of kidney in WHR and SHR16w was significantly higher than that in the controls by Western blotting assay (P<0.01).Conclusion Extracellular signal transduction system are highly expressed in kidney VSMC of two-kidney one clip WHR and SHR.Phospho-ERK1/2 may play an important role in VSMC hypertrophy and hyperplasia under hypertension. 展开更多
关键词 HYPERTENSION vascular smooth muscle cell extracellular signal-regulated kinase
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Activation of extracellular signal-related kinases 1 and 2 in Sertoli cells in experimentally cryptorchid rhesus monkeys 被引量:6
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作者 Xue-Sen Zhang Zhi-Hong Zhang Shu-Hua Guo Wei Yang Zhu-Qiang Zhang Jin-Xiang Yuan Xuan Jin Zhao-Yuan Hu Yi-Xun Liu 《Asian Journal of Andrology》 SCIE CAS CSCD 2006年第3期265-272,共8页
Aim: To assess the spatiotemporal changes in the expression of extracellular signal-regulated kinases 1 and 2 (ERK1/ 2), c-Jun N-terminal kinases (JNK) and p38 mitogen-activated protein kinases (MAPK) in respon... Aim: To assess the spatiotemporal changes in the expression of extracellular signal-regulated kinases 1 and 2 (ERK1/ 2), c-Jun N-terminal kinases (JNK) and p38 mitogen-activated protein kinases (MAPK) in response to heat stress in the cryptorchid testis, and to investigate a possible relation to Sertoli cell dedifferentiation. Methods: Immunohistochemistry and western blot were used to examine the expression and activation of ERK1/2, p38 and JNK in the cryptorchid testis at various stages after experimental cryptorchidism. Results: The abdominal temperature did not obviously change the total ERK1/2 expression but significantly activated phospho-ERK1/2 in the Sertoli cells of the cryptorchid testis. Heat stress increased total JNK expression in the Sertoli cells of the cryptorchid testis but did not activate phospho-JNK. Neither total p38 nor phospho-p38 was induced by heat stress in the Sertoli cells of the cryptorchid testis. Changes in the spatiotemporal expression of cytokeratin 18 (CK18), a marker of immature or undifferentiated Sertoli cells, were induced in the cryptorchid testis in a pattern similar to the activation of ERK1/2. Condusion: The activation of ERK1/2 in the testis may be related to dedifferentiation of Sertoli cells under heat stress induced by experimental cryptorchidism. 展开更多
关键词 rhesus monkey CRYPTORCHIDISM Sertoli cell DEDIFFERENTIATION extracellular signal-regulated kinases 1 and 2
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芒柄花黄素经ERK信号通路抑制食管癌细胞的免疫逃逸机制
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作者 郑时桢 王炜辰 +3 位作者 马黄璜 翁小琴 池志珍 苏彩平 《河北医药》 CAS 2024年第20期3045-3050,共6页
目的探讨芒柄花黄素(Formononetin)通过ERK信号通路对食管癌细胞免疫逃逸的影响机制。方法选取食管癌TE-1细胞系,原代培养,选取P3代单层细胞纳入研究;采用不同浓度(0、50、100、200μg/mL)Formononetin处理细胞24 h;MTT、划痕实验、Tran... 目的探讨芒柄花黄素(Formononetin)通过ERK信号通路对食管癌细胞免疫逃逸的影响机制。方法选取食管癌TE-1细胞系,原代培养,选取P3代单层细胞纳入研究;采用不同浓度(0、50、100、200μg/mL)Formononetin处理细胞24 h;MTT、划痕实验、Transwell实验检测TE-1细胞增殖、迁移、侵袭能力;ELISA检测细胞上清液免疫逃逸相关因子(IL-4、IL-10、TNF-α)水平;Western-blot检测免疫逃逸关键因子B7-H1及ERK信号通路关键蛋白(ERK1/2、c-Fos、c-Jun)浓度表达;食管癌TE-1细胞采用ERK信号通路抑制剂SCH772984处理,检测Control组、Formononetin组、SCH772984组、Formononetin+SCH772984组ERK信号通路关键蛋白(ERK1/2、c-Fos、c-Jun)表达,确定Formononetin对ERK信号通路的靶向调控。结果随着细胞培养时间延长,各组食管癌细胞均体现出增殖的趋势(P<0.05);与Control组相比,Formononetin的干预可明显下调食管癌细胞的增殖能力、迁移能力及侵袭能力(P<0.05);且随着Formononetin干预剂量的提升,食管癌细胞的增殖能力、迁移能力、侵袭能力均逐渐降低,呈现计量依赖性(P<0.05)。Formononetin干预可明显下调免疫共刺激因子B7-H1、免疫逃逸相关因子(IL-4、IL-10、TNF-α)水平(P<0.05);且随着Formononetin干预剂量提升,食管癌细胞B7-H1、IL-4、IL-10、TNF-α含量均逐渐降低,呈现计量依赖性(P<0.05);Formononetin干预可明显下调ERK信号通路关键蛋白(ERK1/2、c-Fos、c-Jun)浓度表达(P<0.05);且随着Formononetin干预剂量的提升,食管癌细胞内ERK1/2、c-Fos、c-Jun浓度表达逐渐降低,呈现计量依赖性(P<0.05);与Control组相比,Formononetin、ERK信号通路抑制剂SCH772984的干预可以明显下调ERK信号通路关键蛋白(ERK1/2、c-Fos、c-Jun)浓度表达(P<0.05);二者联合干预后ERK信号通路活性进一步下降,食管癌细胞内ERK1/2、c-Fos、c-Jun浓度表达亦降低(P<0.05)。结论芒柄花黄素通过靶向抑制ERK信号通路活性降低食管癌细胞的免疫逃逸能力,降低肿瘤细胞增殖、迁移及侵袭能力,最终抑制肿瘤远处扩散,值得临床进一步研究。 展开更多
关键词 芒柄花黄素 食管肿瘤 erk信号通路 免疫逃逸 恶性进展
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线粒体内膜蛋白17(MPV17)通过阻断ERK通路抑制铁过载小鼠脾脏CD3^(+)T细胞铁死亡
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作者 徐涛 井文君 陈贵兰 《细胞与分子免疫学杂志》 CAS CSCD 北大核心 2024年第5期395-403,共9页
目的探索铁过载对小鼠脾脏损伤的影响及线粒体内膜蛋白17(MPV17)在铁过载小鼠脾脏CD3^(+)T细胞铁死亡中的作用。方法将小鼠随机分为正常饮食组、高铁饮食组、高铁饮食联合铁死亡抑制剂ferrostatin-1(Fer-1)处理组、高铁饮食联合MPV17腺... 目的探索铁过载对小鼠脾脏损伤的影响及线粒体内膜蛋白17(MPV17)在铁过载小鼠脾脏CD3^(+)T细胞铁死亡中的作用。方法将小鼠随机分为正常饮食组、高铁饮食组、高铁饮食联合铁死亡抑制剂ferrostatin-1(Fer-1)处理组、高铁饮食联合MPV17腺病毒注射组,每组5只。喂食8周后,取脾脏组织并固定,通过组织切片和HE染色法观察脾脏结构,碘化丙啶(PI)染色检测脾脏CD3^(+)T细胞死亡,脂质过氧化荧光探针C11 BODIPY 581/591检测脂质氧化,实时定量PCR检测溶质载体家族7成员11(SLC7A11)及前列腺素内过氧化物合成酶2(PTGS2)mRNA水平,流式细胞术检测M1、M2巨噬细胞比例,ELISA实验检测肿瘤坏死因子α(TNF-α)、白细胞介素1β(IL-1β)及IL-6的含量。同时增加高铁饮食联合细胞外信号调节激酶(ERK)抑制剂处理组、ERK激活剂处理组、β半乳糖苷(β-gal)酶联合ERK激活剂处理组、MPV17联合ERK激活剂处理组,Western blot法检测MPV17、谷胱甘肽过氧化物酶4(GPX4)、磷酸化的ERK(p-ERK)水平,JC-1结合流式细胞术检测线粒体膜电位。结果与正常饮食组相比,高铁饮食组小鼠脾脏红髓形状不规则,白髓结构消失,脾脏CD3^(+)T细胞死亡增多,脂质过氧化物增多,SLC7A11及PTGS2表达升高,血液中M1/M2巨噬细胞比例升高,炎症因子含量升高;经Fer-1处理或过表达MPV17,部分恢复脾脏结构,CD3^(+)T细胞数量及脂质过氧化物减少,SLC7A11及PTGS2表达被抑制,M1/M2巨噬细胞比例及炎症因子的含量降低。高铁饮食导致GPX4表达降低,p-ERK表达升高,抑制ERK部分恢复GPX4表达,激活ERK降低GPX4表达;MPV17抑制ERK部分恢复GPX4表达,MPV17部分恢复因ERK激活导致的线粒体膜电势降低。结论铁过载可诱导小鼠脾脏CD3^(+)T细胞发生铁死亡,MPV17通过阻断ERK信号抑制高铁饮食诱导的脾脏CD3^(+)T细胞铁死亡。 展开更多
关键词 铁过载 T淋巴细胞 铁死亡 线粒体内膜蛋白MPV17 细胞外信号调节激酶(erk)
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miRNA-7-EGFR/ERK通路用于卵巢癌治疗的研究进展
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作者 王心悦(综述) 路会侠(审校) 《海南医学》 CAS 2024年第18期2728-2731,共4页
卵巢癌(OC)在女性生殖系统肿瘤中致死率最高,治疗多选择手术切除加辅助化疗,然而易出现耐药性,导致患者预后差。miRNA-7在卵巢癌细胞中低表达,通过靶向表皮生长因子受体(EGFR)/细胞外调节蛋白激酶(ERK)信号通路发挥抗肿瘤作用。本综述介... 卵巢癌(OC)在女性生殖系统肿瘤中致死率最高,治疗多选择手术切除加辅助化疗,然而易出现耐药性,导致患者预后差。miRNA-7在卵巢癌细胞中低表达,通过靶向表皮生长因子受体(EGFR)/细胞外调节蛋白激酶(ERK)信号通路发挥抗肿瘤作用。本综述介绍miRNA-7-EGFR/ERK通路在卵巢癌治疗中的作用,为卵巢癌的治疗提供新的思路。 展开更多
关键词 卵巢癌 miRNA-7 EGFR erk 治疗
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连翘脂素调节Ras/Raf/MEK/ERK信号通路对结直肠癌细胞恶性生物学行为的影响
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作者 郑声友 李叶若 肖嘉伍 《河北医药》 CAS 2024年第12期1771-1776,共6页
目的 探究连翘脂素(PG)对结直肠癌细胞增殖、迁移、侵袭、凋亡以及上皮间质转化的影响及机制。方法 培养HCT116结直肠癌细胞,采用10~200μmol/L的连翘脂素处理细胞,检测细胞存活率,筛选最佳实验浓度。将细胞分为对照组(Control组),连翘... 目的 探究连翘脂素(PG)对结直肠癌细胞增殖、迁移、侵袭、凋亡以及上皮间质转化的影响及机制。方法 培养HCT116结直肠癌细胞,采用10~200μmol/L的连翘脂素处理细胞,检测细胞存活率,筛选最佳实验浓度。将细胞分为对照组(Control组),连翘脂素低、中、高浓度组(PG-L组、PG-M组、PG-H组),连翘脂素高浓度+转染慢病毒阴性对照组(PG-H+NC组),连翘脂素高浓度+Ras慢病毒组(PG-H+Ras组)。平板克隆形成实验检测细胞增殖;划痕实验检测细胞迁移;Transwell小室法检测细胞侵袭;流式细胞术以及Hoechst33258染色法检测细胞凋亡;Western blot法检测上皮间质转化(EMT)标志蛋白E型钙黏蛋白(E-cadherin)、波形蛋白(Vimentin)以及信号通路相关蛋白p-Raf、p-MEK、p-ERK表达;建立荷瘤小鼠模型评价连翘脂素对结直肠癌肿瘤生长的影响。结果 10~200μmol/L的连翘脂素处理HCT116结直肠癌细胞,可以显著抑制细胞存活率,经计算IC50值为(140.4±2.147)μmol/L,选择10、50、100μmol/L连翘脂素进行后续实验;与Control组比较,PG-L组、PG-M组、PG-H组HCT116细胞克隆形成率、划痕愈合率、细胞侵袭个数以及Vimentin、p-Raf、p-MEK、p-ERK表达显著降低,细胞凋亡率以及E-cadherin表达显著升高,且呈浓度依赖性(P<0.05);与PG-H+NC组比较,PG-H+Ras组HCT116细胞克隆形成率、划痕愈合率、细胞侵袭个数以及Vimentin、p-Raf、p-MEK、p-ERK表达显著升高,细胞凋亡率以及E-cadherin表达显著降低(P<0.05);连翘脂素可以显著抑制结直肠癌移植瘤的生长。结论 连翘脂素可以抑制结直肠癌细胞增殖、迁移、侵袭、凋亡以及上皮间质转化,其作用机制可能与抑制Ras/Raf/MEK/ERK信号通路激活有关。 展开更多
关键词 连翘脂素 Ras/Raf/MEK/erk信号通路 结直肠癌 上皮间质转化 增殖 凋亡
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Activation of extracellular signal-related kinases 1 and 2 in Sertoli cells in experimentally cryptorchid rhesus monkeys 被引量:1
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作者 Xue-Sen Zhang~+ Zhi-Hong Zhang~+ Shu-Hua Guo Wei Yang,Zhu-Qiang Zhang Jin-Xiang Yuan Xuan Jin Zhao-Yuan Hu Yi-Xun Liu State Key Laboratory of Reproductive Biology,Institute of Zoology,Chinese Academy of Sciences,25 Bei Si Huan Road West,Beijing 100081,China 《Asian Journal of Andrology》 SCIE CAS CSCD 2006年第A03期265-272,385,共5页
Aim:To assess the spatiotemporal changes in the expression of extracellular signal-regulated kinases 1 and 2(ERK1/ 2),c-Jun N-terminal kinases(JNK)and p38 mitogen-activated protein kinases(MAPK)in response to heat str... Aim:To assess the spatiotemporal changes in the expression of extracellular signal-regulated kinases 1 and 2(ERK1/ 2),c-Jun N-terminal kinases(JNK)and p38 mitogen-activated protein kinases(MAPK)in response to heat stress in the cryptorchid testis,and to investigate a possible relation to Sertoli cell dedifferentiation.Methods:Immunohis- tochemistry and western blot were used to examine the expression and activation of ERK1/2,p38 and JNK in the cryptorchid testis at various stages after experimental cryptorchidism.Results:The abdominal temperature did not obviously change the total ERK1/2 expression but significantly activated phospho-ERK1/2 in the Sertoli cells of the cryptorchid testis.Heat stress increased total JNK expression in the Sertoli cells of the cryptorchid testis but did not activate phospho-JNK.Neither total p38 nor phospho-p38 was induced by heat stress in the Sertoli cells of the cryptorchid testis.Changes in the spatiotemporal expression of cytokeratin 18(CK18),a marker of immature or undifferentiated Sertoli cells,were induced in the cryptorchid testis in a pattern similar to the activation of ERK1/2. Conclusion:The activation of ERK1/2 in the testis may be related to dedifferentiation of Sertoli cells under heat stress induced by experimental cryptorchidism. 展开更多
关键词 rhesus monkey CRYPTORCHIDISM Sertoli cell DEDIFFERENTIATION extracellular signal-regulated kinases 1 and 2
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