期刊文献+
共找到8篇文章
< 1 >
每页显示 20 50 100
Sericin can reduce hippocampal neuronal apoptosis by activating the Akt signal transduction pathway in a rat model of diabetes mellitus 被引量:4
1
作者 Zhihong Chen Yaqiang He +3 位作者 Chengjun Song Zhijun Dong Zhejun Su Jingfeng Xue 《Neural Regeneration Research》 SCIE CAS CSCD 2012年第3期197-201,共5页
In the present study, a rat model of type 2 diabetes mellitus was established by continuous peritoneal injection of streptozotocin. Following intragastric perfusion of sericin for 35 days, blood glucose levels signifi... In the present study, a rat model of type 2 diabetes mellitus was established by continuous peritoneal injection of streptozotocin. Following intragastric perfusion of sericin for 35 days, blood glucose levels significantly reduced, neuronal apoptosis in the hippocampal CA1 region decreased, hippocampal phosphorylated Akt and nuclear factor kappa B expression were enhanced, but Bcl-xL/Bcl-2 associated death promoter expression decreased. Results demonstrated that sericin can reduce hippocampal neuronal apoptosis in a rat model of diabetes mellitus by regulating abnormal changes in the Akt signal transduction pathway. 展开更多
关键词 SERICIN type 2 diabetes mellitus HIPPOCAMPUS apoptosis Akt signal transduction pathway neural regeneration
下载PDF
扶正解毒方选择性抑制肿瘤血管生成及调控VEGF/VEGFR-2信号通路的实验研究 被引量:6
2
作者 刘浩 方素萍 +1 位作者 赵志正 王家伟 《中国中医药科技》 CAS 2015年第6期626-628,共3页
目的:探讨扶正解毒方选择性抑制肿瘤血管生成及其相关作用机制。方法:以肿瘤血管内皮细胞模型、正常血管内皮细胞及Lewis肺癌荷瘤小鼠为研究对象,随机分为生理盐水组、贝伐单抗组、扶正解毒组及其拆方扶正、解毒药物组,采用MTT法观察扶... 目的:探讨扶正解毒方选择性抑制肿瘤血管生成及其相关作用机制。方法:以肿瘤血管内皮细胞模型、正常血管内皮细胞及Lewis肺癌荷瘤小鼠为研究对象,随机分为生理盐水组、贝伐单抗组、扶正解毒组及其拆方扶正、解毒药物组,采用MTT法观察扶正解毒方药、贝伐单抗对肿瘤血管内皮细胞与正常血管内皮细胞增殖的影响;采用免疫组化法观察药物对Lewis肺癌荷瘤小鼠瘤组织VEGF表达的影响;采用Western Blotting法观察药物对血管内皮细胞VEGFR-2(KDR)表达的影响。结果:扶正解毒方能够抑制肿瘤血管内皮细胞增殖(P<0.05),而对正常血管内皮细胞增殖没有明显影响(P>0.05),贝伐单抗对肿瘤血管内皮细胞及正常血管内皮细胞增殖均有抑制作用(P<0.01),扶正解毒组与贝伐单抗组比较有明显差异(P<0.05);扶正解毒方能降低瘤组织VEGF表达及肿瘤血管内皮细胞VEGFR-2表达(P>0.05),扶正解毒方组VEGFR-2表达水平与正常血管内皮细胞相近。结论:扶正解毒方能够选择性抑制肿瘤血管生成,其作用机制与调控VEGF/VEGFR-2信号传导有关。 展开更多
关键词 扶正解毒方 肿瘤血管内皮细胞 vegf/vegfr-2信号传导通路
下载PDF
Comparative analysis of various modularization algorithms and species specific study of VEGF signaling pathways 被引量:2
3
作者 Namrata Tomar Losiana Nayak Rajat K. De 《Journal of Biomedical Science and Engineering》 2010年第10期931-942,共12页
In biology, signal transduction refers to a process by which a cell converts one kind of signal or stimulus into another. It involves ordered sequences of biochemical reactions inside the cell. These cascades of react... In biology, signal transduction refers to a process by which a cell converts one kind of signal or stimulus into another. It involves ordered sequences of biochemical reactions inside the cell. These cascades of reactions are carried out by enzymes and activated by second messengers. Signal transduction pathways are complex in nature. Each pathway is responsible for tuning one or more biological functions in the intracellular environment as well as more than one pathway interact among themselves to carry forward a single biological function. Such kind of behavior of these pathways makes understanding difficult. Hence, for the sake of simplicity, they need to be partitioned into smaller modules and then analyzed. We took VEGF signaling pathway, which is responsible for angiogenesis for this kind of modularized study. Modules were obtained by applying the algorithm of Nayak and De (Nayak and De, 2007) for different complexity values. These sets of modules were compared among themselves to get the best set of modules for an optimal complexity value. The best set of modules compared with four different partitioning algorithms namely, Farhat’s (Farhat, 1998), Greedy (Chartrand and Oellermann, 1993), Kernighan-Lin’s (Kernighan and Lin, 1970) and Newman’s community finding algorithm (Newman, 2006). These comparisons enabled us to decide which of the aforementioned algorithms was the best one to create partitions from human VEGF signaling pathway. The optimal complexity value, on which the best set of modules was obtained, was used to get modules from different species for comparative study. Comparison among these modules would shed light on the trend of development of VEGF signaling pathway over these species. 展开更多
关键词 signal transduction pathway vegf pathway Complexity Value KEGG Database MODULARIZATION Newman’s Community Finding ALGORITHM Kernighan-Lin’s ALGORITHM Farhat’s ALGORITHM and GREEDY Algorithm.
下载PDF
Activation of the PI3K/AKT pathway mediates FSH-stimulated VEGF expression in ovarian serous cystadenocarclnoma 被引量:17
4
作者 Yan Huang Keqin Hua +6 位作者 Xianrong Zhou Hongyan Jin Xiaojun Chen Xin Lu Yinhua Yu Xiliang Zha Youji Feng 《Cell Research》 SCIE CAS CSCD 2008年第7期780-791,共12页
There is evidence to suggest that follicle-stimulating hormone (FSH) can facilitate the neovascularization of ovarian cancers by increasing vascular endothelial growth factor (VEGF) expression in cancer cells, alt... There is evidence to suggest that follicle-stimulating hormone (FSH) can facilitate the neovascularization of ovarian cancers by increasing vascular endothelial growth factor (VEGF) expression in cancer cells, although the underlying molecular mechanism of this process is not well known. Therefore, we investigated the effect of FSH on VEGF expression in the ovarian cancer cell lines SKOV-3 and ES-2. Treatment with FSH significantly increased VEGF expression in a dose- and time-dependent manner. In addition, FSH treatment enhanced the expression of survivin and hypoxlainducible factor-1 (HIF-1α). Knockdown of survivin or HIF-1α suppressed VEGF expression, but only knockdown of survivin inhibited FSH-stimulated VEGF expression. Pretreatment with LY294002, a phosphoinositide 3-kinase (PI3K)/AKT inhibitor, neutralized the enhanced expression of survivin induced by FSH, but treatment with U0126, a mitogen-activated protein kinase/extracellular signal-regulated kinase inhibitor, had no such effect. We further showed that ovarian serous cystadenocarcinoma samples had much higher incidence of positive AKT and phosphorylated AKT (pAKT) protein staining than did benign ovarian cystadenoma samples (p 〈 0.01). The 5-year survival rate was only about 15% in patients with ovarian serous cystadenocarcinoma who had AKT and pAKT expression, whereas it was about 80% in those who did not have AKT or pAKT expression. Taken together, these results indicate that FSH increases the expression of VEGF by upregulating the expression of survivin, which is activated by the PI3K/AKT signaling pathway. Understanding the role of the PI3K/AKT pathway in FSH-stimulated expression of survivin and VEGF will be beneficial for evaluating the prognosis for patients with ovarian serous cystadenocarcinoma and for pursulug effective treatment against this disease. 展开更多
关键词 FSH vegf SURVIVIN PI3K/AKT signal transduction pathway ovarian serous cystadenocarcinoma
下载PDF
The molecular mechanism underlying angiogenesis in hepatocellular carcinoma: the imbalance activation of signaling pathways 被引量:19
5
作者 Zhi-Cheng Zhao Shu-Sen Zheng +2 位作者 Yun-Le Wan Chang-Ku Jia Hai-Yang Xie the Department of Hepatobiliary Surgery, First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310003, China 《Hepatobiliary & Pancreatic Diseases International》 SCIE CAS 2003年第4期529-536,共8页
OBJECTIVE: To explore the effect of two dominating signaling pathways, VEGF/KDR and angiopoietins/Tie2, on the formation of new blood vessel in hepatocellular carcinoma (HCC) growth and metastasis. METHODS: RT-PCR and... OBJECTIVE: To explore the effect of two dominating signaling pathways, VEGF/KDR and angiopoietins/Tie2, on the formation of new blood vessel in hepatocellular carcinoma (HCC) growth and metastasis. METHODS: RT-PCR and Western blot were employed to evaluate the VEGF/KDR and angiopoietins/Tie2 expression in samples from 23 patients with HCC. Meanwhile, microvessel density (MVD) was determined as a marker of angiogenesis by counting CD34 positive cells with the method of immunohistochemistry. RESULTS: The two pathways were activated in all HCC samples. The expressions of vascular endothelial growth factor (VEGF) and angiopoietin-2 (Ang2) were significantly higher (P<0.05) in hepatocellular carcinoma tissues and the margin of the tumor than those in control groups, and so did CD34 positive cells. Although significant difference in the expression of kinase insert domain containing receptor (KDR) and Ang1/Tie2 was not observed in all groups, their distinct high levels were seen in hepatoma and its margin compared with normal and cirrhotic liver. VEGF and Ang2 expressions were seen up-regulated in HCC with vascular invasion and satellite lesion. CONCLUSIONS: The two signaling pathways, VEGF/KDR and angiopoietins/Tie2 are activated in the process of angiogenesis in HCC and modulate the formation of new blood vessels. The imparity of the two signaling pathways' activation is to benefit HCC metastasis. In the two pathways, VEGF and Ang2 may play an important role in the process of angiogenesis, and are necessary indicators for the prognosis and metastasis of HCC. This study provides another clue for the exploration of anti-angiogenic agents. 展开更多
关键词 hepatocellular carcinoma signaling pathway ANGIOGENESIS vegf/KDR angiopoietins/Tie2
下载PDF
Tetramethylpyrazine and paeoniflorin combination(TMP-PF)inhibits angiogenesis in atherosclerosis via miR-126/VEGF/VEGFR2 signaling pathway 被引量:1
6
作者 Yahui Yuan Rong Yuan +4 位作者 Qiqi Xin Yu Miao Ying Chen Rui Gao Weihong Cong 《Journal of Future Foods》 2024年第3期280-287,共8页
Angiogenesis in atherosclerosis(AS)promotes plaque destabilization.miR-126 has a significant role in angiogenesis.Tetramethylpyrazine(TMP)and paeoniflorin(PF)have anti-atherosclerotic effects.However,the miR-126-relat... Angiogenesis in atherosclerosis(AS)promotes plaque destabilization.miR-126 has a significant role in angiogenesis.Tetramethylpyrazine(TMP)and paeoniflorin(PF)have anti-atherosclerotic effects.However,the miR-126-related mechanisms of TMP and PF combination(TMP-PF)on angiogenesis in AS have not been understood.To explore the mechanism of TMP-PF on angiogenesis in AS targeting miR-126.Human umbilical vein endothelial cells(HUVECs)were assigned into the control,model,TMP-PF,TMP-PF+miR-126 inhibitor,and simvastatin groups.HUVECs were transfected with miR-126 inhibitor or negative control,incubated with oxidized low-density lipoprotein(ox-LDL)to establish AS model,and then treated with TMP-PF or simvastatin.Cell proliferation,migration,and tube formation assays are conducted,and the expression of angiogenesis-related factors were detected by enzyme-linked immunosorbent assay(ELISA)and Western blotting.The expression level of miR-126 was confirmed by polymerase chain reaction(PCR).0x-LDL promoted HUVECs proliferation,migration,and tube formation,downregulated miR-126 expression,and increased the expression of VEGF,VEGFR2,bFGF,and FGFR1.TMP-PF inhibited proliferation,migration,and tube formation,upregulated miR-126 expression and decreased the expression of VEGF,VEGFR2,bFGF,and FGFR1 in ox-LDL-induced HUVECs.However,the effects of TMP-PF on angiogenesis and the expression of miR-126,VEGF,VEGFR2,and FGFR1 were abolished by miR-126 inhibitor.TMP-PF suppressed angiogenesis in AS by regulating miR-126/VEGF/VEGFR2 pathway,which might elucidate the underlying mechanism of TMP-PF in alleviating AS. 展开更多
关键词 ATHEROSCLEROSIS Angiogenesis TETRAMETHYLPYRAZINE PAEONIFLORIN miR-126/vegf/vegfR2 signaling pathway
原文传递
TTF1调控ERK信号转导通路的作用 被引量:2
7
作者 李晓莞 李妍 +1 位作者 金爱花 张学武 《延边大学医学学报》 CAS 2010年第3期173-174,共3页
[目的]探讨TTF1调控ERK信号转导通路的作用.[方法]建立人肝癌HepG2裸鼠移植瘤模型,取40只随机分为阴性对照组、紫杉醇组、TTF1小剂量组、TTF1中剂量组及TTF1大剂量组,每组各为8只,药物干预21 d后处死裸鼠,采用Western blot技术检测肿瘤... [目的]探讨TTF1调控ERK信号转导通路的作用.[方法]建立人肝癌HepG2裸鼠移植瘤模型,取40只随机分为阴性对照组、紫杉醇组、TTF1小剂量组、TTF1中剂量组及TTF1大剂量组,每组各为8只,药物干预21 d后处死裸鼠,采用Western blot技术检测肿瘤组织ERK1/2和p-ERK1/2蛋白表达.[结果]TTF1对人肝癌HepG2裸鼠移植瘤的生长有抑制作用;ERK1/2蛋白表达未见明显变化,p-ERK1/2蛋白表达随着TTF1剂量的升高而减少.[结论]TTF1对肿瘤生长有抑制作用,其机制可能与通过调节ERK信号转导通路有关. 展开更多
关键词 调控 ERK信号 转导通路 signal transduction pathway 蛋白表达 P-ERK1/2 裸鼠移植瘤模型 抑制作用 中剂量 人肝癌 肿瘤组织 肿瘤生长 药物干预 技术检测 Western 紫杉醇 小剂量 对照组 大剂量 阴性
下载PDF
G protein b_1λ_2 subunits purification and their interaction with adenylyl cyclase 被引量:1
8
作者 陈巨莲 倪汉祥 +1 位作者 孙京瑞 WENG Gezhi 《Science China(Life Sciences)》 SCIE CAS 2003年第2期212-223,共12页
A preliminary study on the interaction of G protein (guanine triphosphate binding pro- tein) b1g2 subunits and their coupled components in cell signal transduction was conducted in vitro. The insect cell lines, Sf9 (S... A preliminary study on the interaction of G protein (guanine triphosphate binding pro- tein) b1g2 subunits and their coupled components in cell signal transduction was conducted in vitro. The insect cell lines, Sf9 (Spodoptera frugiperda) and H5 (Trichoplusia ni ) were used to express the recombinant protein Gb1g2. The cell membrane containing Gb1g2 was isolated through affinity chromatography column with Ni-NTA agarose by FPLC method, and the highly purified protein was obtained. The adenylyl cyclase 2 (AC2) activity assay showed that the purified Gb1g2 could signifi-cantly stimulate AC2 activity. The interaction of b1g2 subunits of G protein with the cytoplasmic tail of various mammalian adenylyl cyclases was monitored by BIAcore technology using NTA sensor chip, which relies on the phenomenon of surface plasmon resonance (SPR). The experiments showed the direct binding of Gb1g2 to the cytoplasmic tail C2 domain of AC2. The specific binding domain of AC2 with Gb1g2 was the same as AC2 activity domain which was stimulated by Gb1g2. 展开更多
关键词 G protein b1g2 subunits G protein coupled signal transductional pathway surface plasmon resonance (SPR) BIAcore technology adenylyl cyclase (AC).
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部