8 research outputs found

    Research on the biocompatibility and changing the biomaterial surface bioactive in Perna viridis adhesive protein

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    海洋贻贝粘附蛋白具有极强的粘接力、湿粘接特性和耐水性,因此可被用于制作水下密封胶和粘合剂,在国防和海洋工程领域有着广泛的应用前景,而且贻贝足腺细胞所分泌的粘液蛋白对细胞没有毒害作用,也不引起细胞炎症反应,因此,在生物材料的表面生物活性改善方面有着极大的应用前景。 翡翠贻贝(Pernaviridis)和紫贻贝(Mytilusedulis)是福建省分布广泛,养殖产量最高的两种贻贝。已经有学者对紫贻贝的粘附蛋白进行了大量研究,而且美国公司已经从紫贻贝中提取研制出了细胞和组织粘合剂Cell-TakTM。而对于翡翠贻贝粘附蛋白(Pernaviridisfootprotein,Pvfp)的研究还很少有文...Marine mussel adhesive protein has the properties of extremely adhesion, moist-adhesion and water resistance. Therefore it can be used to make underwater sealants and adhesives, and has a wide range of applications in national defense and marine engineering. Since the mucus protein secreted from foot gland cells not only is biocompatible and nontoxic to cells but has not inflammatory response, the...学位:理学硕士院系专业:材料学院生物材料系_生物医学工程学号:2452006115267

    太平洋牡蛎幼体附着变态差异蛋白质组研究

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    太平洋牡蛎(Crassostrea angulata)是中国主要的海洋养殖经济物种之一,具有重要的经济价值和商业价值,附着变态是牡蛎幼体从受精卵发育到成体所需的重要阶段,其分子机制的研究对牡蛎养殖育苗具有重要的指导意义.本研究利用双向电泳技术分离筛选牡蛎幼体附着变态过程中的差异表达的蛋白,进一步利用质谱技术鉴定幼体附着变态过程中发育相关的关键蛋白,共筛选出128个差异蛋白,鉴定并注释了39种蛋白.通过对差异表达蛋白功能分析,筛选获得了与纤毛组建相关的筑丝蛋白和与稳定钙离子胞内浓度相关的钙网蛋白,为揭示牡蛎幼体面盘组织及纤毛的退化消失和钙离子有效诱导幼体附着变态的机制提供分子数据.同时还获得了调节脂肪酸β-氧化、三羧酸循环和糖酵解重要生理功能的关键酶蛋白:乙酰辅酶A脱氢酶、异柠檬酸脱氢酶和3-磷酸甘油醛脱氢酶,以及调节无脊椎动物机体能量存储和释放的酶蛋白:精氨酸激酶和ATP合成酶,进一步阐明了牡蛎幼体在附着变态过程中能量调节的分子机制.福建省教育厅福建省中青年教师教育科研资助项目(JA15811);;厦门市科技局科技计划资助项目(3502Z20154078);;厦门医学院自然科学类科研计划资助项目(Z2014-08

    福建牡蛎新基因SMRP1的功能分析

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    通过对福建牡蛎幼体不同发育时期的转录组文库比对分析,结果显示牡蛎附着变态相关蛋白1(settlement and metamorphosis related protein1,SMRP1)基因在幼体附着变态时期高表达,利用定量即时聚合酶连锁反应...福建省科技厅青年基金(2016D024);; 厦门市科技局科技计划项目(3502Z20154078);; 厦门医学院自然科学类科研计划项目(K2016-18

    Structure and Function of Marine Mussel Adhesive Proteins

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    海洋贻贝粘附蛋白具有高强度、高韧性和防水性,以及极强的黏附基体的功能,这与其特殊的分子结构、多巴(DOPA)介导的链间交联和与底材之间的相互作用方式有关,并且,它还具有很好的生物相容性和可降解性,是一类极具优势和潜力的生物胶黏剂.本文主要就粘附蛋白分子的结构和功能、粘附蛋白的粘附机理以及有关粘附蛋白生物粘剂等问题对其进行综述.The characteristics of marine mussel adhesive proteins,such as strong intensity, tenacity,moisture-resistance and strong adhesive ability,are due to their peculiarity of molecular structure, cross-linking of bonds and the interaction between proteins and substratum mediated by DOPA. Furthermore, they are biocompatible and biodegradable. Therefore, marine mussel adhesive proteins may be a preponderant and potential bio-adhesive. This review mainly focused on structure and function of adhesive protein molecule, adhesive mechanism of adhesive protein, and the potential of adhesive protein to be bio-adhesive.福建省青年科技人才创新项目(No.2004J022);; 国家自然科学基金(No.30600147)资助~

    厚壳贻贝粘附蛋白十肽重复序列的表达及功能分析

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    利用PCR扩增Mcfp-1(M.coruscus foot protein-1)基因的12个十肽重复序列粘附功能片段(Mcfp-11~12)并连接到pGEX-4T1表达载体中,在大肠杆菌BL21(DE3)中诱导表达.纯化的多肽产物经凝血酶处理切除GST标签,获得Mcfp-11~12功能肽段,最后用酪氨酸酶对该产物进行修饰.通过材料表面包被、石英晶体微天平(QCM,quartz crystalmicro balance)分析、细胞粘附和细胞毒性等实验,研究了该表达产物作为生物粘合剂的粘附特性.结果显示,重组表达产物Mcfp-11~12在多种材料表面的包被能力与Cell-TakTM(天然提取的贻贝粘附蛋白混合物)相当,甚至更佳;对细胞的粘附能力与Cell-TakTM相当;用HeLa细胞和293T细胞进行的MTT实验未发现细胞毒性.上述结果表明,Mcfp-11~12作为生物医用粘合剂具有潜在应用价值;同时,基因重组技术可以为制备新型海洋贻贝粘附蛋白防水生物粘合剂提供有效的手段.本研究为临床使用更优质的生物医用粘合剂提供了理论依据

    食管癌组织中CuZn-SOD活性和表达的研究

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    [目的]通过对食管癌组织和癌旁组织中CuZn-SOD活性和表达检测,探讨CuZn-SOD活性和表达在食管癌发生、发展中的作用。[方法]CuZn-SOD活性和表达的检测分别采用DTNB直接法和Western Bloting方法。[结果]总SOD和CuZn-SOD的活性在食管癌组织和相应癌旁组织中的差异尚不能认为有统计学意义。30%食管癌组织中CuZn-SOD的表达明显高于癌旁组织。[结论]不同病例中表达水平结果不一致,CuZn-SOD的表达水平与肿瘤的发生或发展存在一定的联系

    Study on the genes and differentially expressed proteins related to larval metamorphosis from Fujian oyster, Crassostrea angulata

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    附着和变态是海洋无脊椎动物幼体生活史中关键的环节之一,变态的成功与否与种群动态密切相关。这一过程涉及到行为和形态学上激烈的变化,也涉及复杂的分子生物学过程。福建牡蛎(Crassostreaangulata)又称葡萄牙牡蛎,是我国东南沿岸重要的主导养殖贝类之一。本文采用分子生物学方法,研究福建牡蛎幼体附着和变态过程中相关功能基因的作用,探讨幼体附着和变态的分子机制,期望为贝类早期发育生物学和分子生态学提供新资料,也为牡蛎人工育苗技术改进提供理论基础。 本研究从福建牡蛎幼体转录组文库中获得了肾上腺素受体基因的EST片段序列,利用末端快速扩增技术(RACE)首次从福建牡蛎幼体获得肾上腺素受体基因c...The Fujian oyster, Crassostrea angulata is an economically important mariculture species in the south area of China, metamorphosis is an essential process for the larval development of this species. The rate of larval metamorphosis could determine the efficiency in the mariculture. The studies of the larval metamorphosis have begun From 1970s, but just based on the pharmacological and biochemical ...学位:理学博士院系专业:海洋与环境学院_海洋生物学学号:2242009015326

    Prokaryotic Expression and mRNA Expression Analysis of Epidermal Growth Factor Receptor During Attachment and Metamorphosis from Crassostrea gigas angulata

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    扩增僧帽牡蛎(CrASSOSTrEA gIgAS AngulATA)的表皮生长因子受体(EPIdErMAl grOWTH fACTOr rECEPTOr,Egfr)基因,并与PET32A(+)载体连接,构建PET32A(+)/Egfr重组质粒.将重组质粒导入大肠杆菌(ESCHErICHIA COlI)bl21(dE3),成功地表达并纯化了一个50ku的重组蛋白.采用rT-PCr技术,检测了僧帽牡蛎幼体附着变态前后Egfr基因表达量的变化,结果表明,Egfr基因在附着变态前的浮游幼体阶段和附着变态24H后的稚贝阶段低表达,附着后1~6H强烈表达,这预示着Egfr基因在僧帽牡蛎幼体附着变态这一生物学过程中具有重要作用.Most benthic marine invertebrates have pelagic larvae that develop to competent stage and then settle on the bottom in response to physical,biological and chemical factors.Many previous investigators focused on exploring the inductive effects of chemical cues on larval settlement and metamorphosis.In this study,a ORF of epidermal growth factor receptor(EGFR) was amplified from sengmao oyster,Crassostrea gigas angulata and the target gene was cloned into prokaryotic expressing vector,pET-32a.After transformation,a soluble protein fused with a hexahistidine affinity ligand was expressed in E.coli BL21(DE3).The 50 ku recombinant protein was highly purified using affinity chromatography.As demonstrated by RT-PCR,EGFR was strongly expressed after 1 to 6 h of attachment of sengmao oyster larvae and weekly expressed before attachment and after 24 h of metamorphosis.And the result of RT-PCR indicated that EGFR played an important role during attachment and metamorphosis of sengmao oyster larvae.国家重点基础研究发展计划(973)项目(2010CB126403
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