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目的：探讨热休克蛋白70（HSP70）在人乳腺癌和胃癌中的表达及其意义。方法：应用免疫组织化学的方法对64例乳腺癌和55例胃癌组织中的HSP70进行检测。结果：（1）HSP70在乳腺癌和胃癌组织中的表达分别为78．13％．61.82％。（2）乳腺癌中HSP70的表达与乳腺癌的病理类型．淋巴结转移情况及年龄未发现显著差异（P〉0．05）。（3）胃癌中HSP70的表达与肿瘤浸润深度、淋巴结转移有密切关系（P〈0．05）。结论：HSP70在乳腺癌和胃癌中均呈较高水平表达．其中在胃癌中的表达与肿瘤浸润深度、恶性程度有密切关系,HSP70在乳腺癌和胃癌的发生发展中起重要作用。HSP70可能成为乳腺癌，胃癌的诊断指标之一。 相似文献
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以拟南芥为材料,对热激蛋白HSP70基因片段进行了克隆研究,获得了最佳的分子克隆实验体系．首先提取拟南芥总DNA,接着在热激蛋白HSP70编码区设计引物,扩增出HSP70编码区的片断,再将HSP70编码区的片断加上具有EcoRⅠ酶切位点双链的人工接头,通过EcoRⅠ对其进行酶切．再与经过EcoRⅠ酶切并已经去磷酸化的PUC19载体通过T4连接酶进行连接,然后将连接产物置人到感受态大肠杆菌细胞中（即转化）,并让这种细胞在含有Amp＋／IPTG／X—Gal的LB培养基上生长．挑取培养基上蓝白斑中的白斑,进行质粒DNA提取,通过酶切质粒DNA,从而初步判断目的片段已被克隆． 相似文献
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This article is to summarize the molecular and functional analysis of the gene "suppression of tumorigenicity 13"(ST13). ST13 is in fact the gene encoding Hsp70 interacting protein (Hip), a co-factor (co-chaperone) of the 70-kDa heat shock proteins (Hsc/Hsp70). By collaborating with other positive co-factors such as Hsp40 and the Hsp70-Hsp90 organizing protein (Hop), or competing with negative co-factors such as Bc12-associated athanogen 1 (Bag1), Hip facilitates may facilitate the chaperone function of Hsc/Hsp70 in protein folding and repair, and in controlling the activity of regulatory proteins such as steroid receptors and regulators of proliferation or apoptosis. Although the nomenclature of ST13 implies a role in the suppression of tumorigenicity (ST), to date available experimental data are not sufficient to support its role in cancer development, except for the possible down-regulation of ST13 in gastric and colorectal cancers. Further investigation of this gene at the physiological level would benefit our understanding of diseases such as endocrinological disorders, cancer, and neurodegeneration commonly associated with protein misfolding. 相似文献
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This article is to summarize the molecular and functional analysis of the gene “suppression of tumorigenicity 13” (ST13). ST13 is in fact the gene encoding Hsp70 interacting protein (Hip), a co-factor (co-chaperone) of the 70-kDa heat shock proteins (Hsc/Hsp70). By collaborating with other positive co-factors such as Hsp40 and the Hsp70-Hsp90 organizing protein (Hop), or competing with negative co-factors such as Bcl2-associated athanogen 1 (Bag1), Hip facilitates may facilitate the chaperone function of Hsc/Hsp70 in protein folding and repair, and in controlling the activity of regulatory proteins such as steroid receptors and regulators of proliferation or apoptosis. Although the nomenclature of ST13 implies a role in the suppression of tumorigenicity (ST), to date available experimental data are not sufficient to support its role in cancer development, except for the possible down-regulation of ST13 in gastric and colorectal cancers. Further investigation of this gene at the physiological level would benefit our understanding of diseases such as endocrinological disorders, cancer, and neurodegeneration commonly associated with protein misfolding. 相似文献
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目的 :探讨HSP70和HSP2 7在食管癌组织中的表达情况。方法 :采用SP免疫组织化学染色检测 5 9例食管癌组织中HSP70和HSP2 7。结果 :HSP70和HSP2 7的总阳性率分别为 6 4.4 1% (38/5 9)和 5 8.6 2 % (34/5 8) ,HSP70和HSP2 7的共同阳性率为 30 .0 0 % (9/30 )。结论 :在食管癌中HSP70和HSP2 7普遍表达。 相似文献
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热激蛋白是生物体遭受胁迫时的一类保护性蛋白,HSP70家族作为抗胁迫的主要分子伴侣之一,目前研究的最为深入．综述了植物HSP70的类型与分布、结构、功能及其编码基因的特征与表达调控等方面的研究进展,为提高植物的耐受性、植物病虫害的防治和植物转基因等方面提供一定的基础知识． 相似文献
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目的:研究HSP27和HSP70在膀胱癌中的表达和意义.方法:应用免疫组化SP法,检测73例膀胱癌组织中的HSP27和HSP70的表达.结果:HSP27和HSP70在膀胱癌中的阳性表达率分别为45.21%(33/73)和34.25%(25/73).HSP27的表达随分级和分期呈降低趋势,但组间无明显性差异(P＞0.05);HSP70的表达与膀胱癌的分级和分期呈正相关(P＜0.05).结论:HSP27和HSP70的表达可作为判断膀胱癌恶性程度的指标,并为肿瘤化学治疗提供依据. 相似文献
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目的:探讨HSP_(27)在消化道癌中的表达状况和意义。方法:收集食道癌、胃癌和大肠癌标本168例,用SP免疫组织化学方法染色。结果:HSP在食道癌、胃癌和大肠癌中的表达率分别为66.04％、37.04％和34.43％;在食道癌中高分化组阳性率(75％)明显高于低分化组(38.46％)。HSP表达与性别、年龄、癌侵润深度、淋巴有无转移的相关性不显著。结论:HSP在食道、胃、大肠癌中表达率依次下降,HSP表达率与癌分化程度有一定相关性。 相似文献
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Yan-yan Shi Jing Zhang Ting Zhang Man Zhou Ye Wang He-jun Zhang Shi-gang Ding 《Journal of Zhejiang University. Science. B》2018,19(10):750-763
Helicobacter pylori infection is related to the development of gastric diseases. Our previous studies showed that high thioredoxin-1 (Trx1) expression in H. pylori can promote gastric carcinogenesis. To explore the underlying molecular mechanisms, we performed an isobaric tags for relative and absolute quantitation (iTRAQ)-based quantitative proteomic analysis of stomach tissues from Mongolian gerbil infected with H. pylori expressing high and low Trx1. Differences in the profiles of the expressed proteins were analyzed by bioinformatics and verified using Western blot analysis. We found three candidate proteins, 14-3-3α/β, glutathione-S-transferase (GST), and heat shock protein 70 (HSP70), in high Trx1 tissues compared with low Trx1 tissues and concluded that cellular stress and redox activityrelated proteins were involved in the pathogenesis of gastric cancer associated with H. pylori Trx1. 相似文献
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Ping Li Bin Bai Hong-yan Zhang Heng Zhou Bo Zhou 《Journal of Zhejiang University. Science. B》2012,13(6):452-464
Plants utilize multiple layers of defense mechanisms to fight against the invasion of diverse pathogens. The R gene mediates resistance, in most cases, dependent on the co-existence of its cognate pathogen-derived avirulence (Avr) gene. The rice blast R gene Piz-t corresponds in gene-for-gene fashion to the Magnaporthe oryzae Avr gene AvrPiz-t. In this study, we determined and compared the genomic sequences surrounding the AvrPiz-t gene in both avirulent and virulent isolates, designating as AvrPiz-t-ZB15 and avrPiz-t-70-15 regions, respectively. The sequence of the AvrPiz-t-ZB15 region is 120 966 bp whereas avrPiz-t-70-15 is 146 292 bp in length. The extreme sequence similarity and good synteny in gene order and content along with the absence of two predicted genes in the avrPiz-t-70-15 region were observed in the predicted protein-coding regions in the AvrPiz-t locus. Nevertheless, frequent presence/absence and highly dynamic organization of transposable elements (TEs) were identified, representing the major variation of the AvrPiz-t locus between different isolates. Moreover, TEs constitute 27.3% and 43.2% of the genomic contents of the AvrPiz-t-ZB15 and avrPiz-t-70-15 regions, respectively, indicating that TEs contribute largely to the organization and evolution of AvrPiz-t locus. The findings of this study suggest that M. oryzae could benefit in an evolutionary sense from the presence of active TEs in genes conferring avirulence and provide an ability to rapidly change and thus to overcome host R genes. 相似文献
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采用大鼠大脑中动脉（MCAO）模型,肌肉内注射神经生长因子（NGF）,经过免疫组化和HE染色检测Sprague—Dawley（SD）大鼠脑缺血再灌注后HIF-1α（缺血诱导因子）及HSP70（热休克蛋白70）表达的变化及神经生长因子的影响。结果表明,肌肉注射神经生长因子对脑缺血再灌注有明显的保护作用,HIF—1α及HSP70表达增加可能是其机制之一。 相似文献
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目的:通过观察预热处理前后大鼠急性运动股四头肌热休克蛋白70(HSP70)、超氧化物歧化酶(SOD)、丙二醛(MDA)的变化,探讨预热处理诱导HSP70表达对运动机体的保护作用.方法:三月龄雄性SD大鼠随机分为室温安静组、室温运动后即刻组、室温运动后3 h组、预热处理安静组、预热处理运动后即刻组、预热处理运动后3 h组.预热处理组进行热暴露处理后,室温恢复24 h后,运动组大鼠进行一次急性运动,运动后即刻和3h进行取样,对股四头肌HSP70的含量、SOD活性、MDA含量进行测试.结果:(1)预热处理安静组HSP70含量明显高于室温安静组(P<0.05)(2)室温组运动后即刻股四头肌HSP70有上升的趋势,但与安静组比较没有显著性的差异,预热处理组运动后即刻HSP70的含量与预热处理安静组比较有显著性的差异,运动后3 h,两组HSP70的表达都明显增加.(3)运动后即刻股四头肌SOD的活性明显升高,3 h后其活性降低,但与安静组比较仍具有显著性差异.在变化过程中预热处理组SOD活性高于室温组.(4)运动后即刻股四头肌MDA的含量明显升高,3 h后减少,在运动后前3 h,预热处理组MDA的清除比室温组迅速,有显著性差异.以上结果表明预热处理诱导HSP70的大量表达可提高运动时SOD活性,降低MDA的含量.提示HSP70可能会提高机体的抗氧化能力,减少自由基对机体的损害,对运动机体具有一定的保护作用. 相似文献
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目的:探讨乳腺肿瘤组织中热休克蛋白HSP70和DNA修复酶O6-甲基鸟嘌呤-DNA甲基转移酶(O6-methyguanine-DNA methytransferase,MGMT)的表达及临床意义。方法:采用免疫组织化学SABC法检测65例乳腺肿瘤组织中HSP70和MGMT的表达情况。结果:乳腺肿瘤中HSP70的阳性率为80.00%(52/65),MGMT的阳性率为60.00%(39/65),二者呈中度相关性(r=0.46)。其中,有淋巴结转移组的阳性率高于无转移组(P<0.05)。结论:HSP70和MGMT的表达率与淋巴结转移情况有关。检测HSP70与MGMT对乳腺肿瘤预后和化疗方案的选择有指导意义。 相似文献
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Ya-e Zhao Zheng-hang Wang Yang Xu Ji-ru Xu Wen-yan Liu Meng Wei Chu-ying Wang 《Journal of Zhejiang University. Science. B》2012,13(10):763-768
To our knowledge, few reports on Demodex studied at the molecular level are available at present. In this study our group, for the first time, cloned, sequenced and analyzed the chitin synthase (CHS) gene fragments of Demodex folliculorum, Demodex brevis, and Demodex canis (three isolates from each species) from Xi’an China, by designing specific primers based on the only partial sequence of the CHS gene of D. canis from Japan, retrieved from GenBank. Results show that amplification was successful only in three D. canis isolates and one D. brevis isolate out of the nine Demodex isolates. The obtained fragments were sequenced to be 339 bp for D. canis and 338 bp for D. brevis. The CHS gene sequence similarities between the three Xi’an D. canis isolates and one Japanese D. canis isolate ranged from 99.7% to 100.0%, and those between four D. canis isolates and one D. brevis isolate were 99.1%–99.4%. Phylogenetic trees based on maximum parsimony (MP) and maximum likelihood (ML) methods shared the same clusters, according with the traditional classification. Two open reading frames (ORFs) were identified in each CHS gene sequenced, and their corresponding amino acid sequences were located at the catalytic domain. The relatively conserved sequences could be deduced to be a CHS class A gene, which is associated with chitin synthesis in the integument of Demodex mites. 相似文献
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Hong-cui Liu Bing-qiang Yuan Shao-nan Li 《Journal of Zhejiang University. Science. B》2016,17(2):110-126
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Jing-min Ou Xi-ping Zhang Cheng-jun Wu Di-jiong Wu Ping Yan 《Journal of Zhejiang University. Science. B》2012,13(11):919-931
Objective: To investigate the protective effects and mechanisms of action of dexamethasone and Salvia miltiorrhiza on multiple organs in rats with severe acute pancreatitis (SAP). Methods: The rats were divided into sham-operated, model control, dexamethasone treated, and Salvia miltiorrhiza treated groups. At 3, 6, and 12 h after operation, the mortality rate of different groups, pathological changes, Bcl-2-associated X protein (Bax) and nuclear factor-κB (NF-κB) protein expression levels in multiple organs (the pancreas, liver, kidneys, and lungs), toll-like receptor 4 (TLR-4) protein levels (only in the liver), intercellular adhesion molecule 1 (ICAM-1) protein levels (only in the lung), and terminal deoxynucleotidy transferase mediated deoxyuridine triphosphate (dUTP) nick end labeling (TUNEL) staining expression levels, as well as the serum contents of amylase, glutamate-pyruvate transaminase (GPT), glutamic-oxaloacetic transaminase (GOT), blood urea nitrogen (BUN), and creatinine (CREA) were observed. Results: The mortality rate of the dexamethasone treated group was significantly lower than that of the model control group (P<0.05). The pathological changes in multiple organs in the two treated groups were relieved to different degrees (P<0.05 and P<0.01, respectively), the expression levels of Bax and NF-κB proteins, and apoptotic indexes of multiple organs were reduced (P<0.05 and P<0.01, respectively). The contents of amylase, GPT, GOT, BUN, and CREA in the two treated groups were significantly lower than those in model control groups (P<0.05 and P<0.01, respectively). The expression level of ICAM-1 protein in the lungs (at 3 and 12 h) in the dexamethasone treated group was significantly lower than that in the Salvia miltiorrhiza treated group (P<0.05). The serum contents of CREA (at 12 h) and BUN (at 6 h) of the Salvia miltiorrhiza treated group were significantly lower than those in the dexamethasone treated group (P<0.05). Conclusions: Both dexamethasone and Salvia miltiorrhiza can reduce the inflammatory reaction, regulate apoptosis, and thus protect multiple organs of rats with SAP. 相似文献
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Yue ZHANG Hai-peng LV Cheng-ying MA Li GUO Jun-feng TAN Qun-hua PENG Zhi LIN 《Journal of Zhejiang University. Science. B》2015,16(2):103-112
目的:从茶树中克隆一种可以催化表没食子儿茶素没食子酸酯(EGCG)生成甲基化EGCG的酶——咖啡酰辅酶A氧甲基转移酶(CCo AOMT),实现甲基化EGCG的酶学合成,为甲基化EGCG的进一步开发利用提供理论依据和技术指导。创新点:本研究首次从茶树中克隆了一条CCo AOMT基因组序列;分析了CCo AOMT基因在不同茶树品种和不同成熟度茶鲜叶中的基因表达规律;证明了CCo AOMT具有催化合成甲基化EGCG的生物活性。方法:采用聚合酶链式反应(PCR)和序列分析获得CCo AOMT的编码序列和基因组序列;采用高效液相色谱-四级杆-飞行时间串联质谱技术(HPLC-QTOF-MS)分析酶促反应生成的甲基化EGCG产物(图4);采用实时荧光定量PCR分析CCo AOMT基因的表达差异(图5)。结论:本研究从茶树中克隆了CCo AOMT基因的编码序列(738 bp)和基因组序列(2678 bp),明确了该基因具有4个内含子和5个外显子;揭示了CCo AOMT可以催化EGCG生成EGCG4"Me、EGCG3"Me和EGCG3’Me等多种甲基化产物;证明了CCo AOMT具有催化生成甲基化EGCG的活性;并发现该基因的表达量高低与茶鲜叶的成熟度呈正相关关系。 相似文献