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凝集

凝集的相关文献在1974年到2023年内共计1418篇,主要集中在临床医学、畜牧、动物医学、狩猎、蚕、蜂、内科学 等领域,其中期刊论文148篇、会议论文2篇、专利文献1268篇;相关期刊127种,包括海洋科学、肉品卫生、华西口腔医学杂志等; 相关会议2种,包括第六届镁业分会年会、中国科协首届学术年会等;凝集的相关文献由3218位作者贡献,包括李铮、郭延垒、阳勇等。

凝集—发文量

期刊论文>

论文:148 占比:10.44%

会议论文>

论文:2 占比:0.14%

专利文献>

论文:1268 占比:89.42%

总计:1418篇

凝集—发文趋势图

凝集

-研究学者

  • 李铮
  • 郭延垒
  • 阳勇
  • 于汉杰
  • 舒健
  • 吴传芳
  • 唐克轩
  • 张莉
  • 鲍锦库
  • F·塞特贝里
  • 期刊论文
  • 会议论文
  • 专利文献

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    • 刘帅; 董毓卿; 岳福鹏; 张树民; 李伟
    • 摘要: 鱼类凝集素成员种类繁多、功能多样,是鱼体免疫系统的重要组成部分.随着生物技术的发展,人们不断从鱼体内分离出多种具有生物活性的凝集素,对鱼类凝集素的研究逐年增多.以鱼类凝集素为研究对象,结合国内外研究成果,对鱼类凝集素的分类及功能等进行阐述,以期为今后的研究及应用提供一定的参考.
    • 刘帅; 董毓卿; 岳福鹏; 张树民; 李伟
    • 摘要: 鱼类凝集素成员种类繁多、功能多样,是鱼体免疫系统的重要组成部分。随着生物技术的发展,人们不断从鱼体内分离出多种具有生物活性的凝集素,对鱼类凝集素的研究逐年增多。以鱼类凝集素为研究对象,结合国内外研究成果,对鱼类凝集素的分类及功能等进行阐述,以期为今后的研究及应用提供一定的参考。
    • 崔智雄; 吴斌; 丁南
    • 摘要: 目的:研究姜黄素对变形链球菌早期生物膜形成的影响.方法:通过稀释法检测姜黄素对变异链球菌的最小抑菌浓度(MIC)、最小杀菌浓度(MBC);离心收集新鲜培养的变异链球菌菌体,PBS缓冲液漂洗后调节其浓度为1×108 CFU/mL,每组分别加入不同浓度的姜黄素,37°C厌氧条件下进行体外生物膜粘附实验,用MTT法检测生物膜粘附的量.通过凝集实验和微生物粘着碳烃化合物法测定姜黄素对变形链球菌细胞的凝集率和表面疏水性的影响.激光共聚焦显微镜观察不同浓度姜黄素处理后的生物膜早期的形态结构的变化.结果:姜黄素对变形链球菌的MIC为32 mg/mL,MBC为128 mg/mL,不同浓度的姜黄素对变形链球菌生物膜的起始粘附均有抑制作用,且随着姜黄素的浓度增加,变形链球菌生物膜的粘附量明显降低,姜黄素的加入还降低变形链球菌的凝集率和疏水率,差异均具有统计学意义(P<0.05);激光共聚焦显微镜观察显示姜黄素对变形链球菌生物膜作用后其生物膜结构变稀疏.结论:姜黄素降低变形链球菌的生物膜的粘附能力、凝集能力和疏水性,影响变形链球菌生物膜早期形成.
    • 唐雯; 范许洲; 李娜; 栾建凤; 朱培元
    • 摘要: 目的 正确的血型鉴定是保证临床输血安全的重要前提.文中旨在探讨无偿献血者初筛复检血型不符的原因,以便提出对策减少差错率.方法 回顾性分析2009年1月1日至2015年12月31日南京军区南京总医院输血科无偿献血者114398人次.献血者血型初筛采用纸板法,血液采集后进行复检.分析筛选错误成因,统计初筛血型错误例数.并分析每年气温较高月份(7、8、9月)、气温较低月份(1、2、12月)、气温均衡月份(其余6个月)初筛错误发生率.结果 共164例初筛血型错误,错误原因主要为血型鉴定错误(95.73%).157例血型鉴定错误中,B、A抗原漏检率分别为43.95%、23.5%.气温较高月份初筛血型错误率(0.19%)较气温较低月份(0.12%)、气温均衡月份(0.12%)明显升高(P<0.05).结论 血型鉴定错误是造成ABO血型初筛错误的主要原因.应注意B抗原漏检,避免高温条件下初筛血型,有助于防止ABO初筛血型错误的发生.
    • 李长平; 黄河; 王帆; 钟名其; 陈洁辉; 章跃陵
    • 摘要: 以凡纳滨对虾(Litopenaeus vannamei)为研究对象,通过分子筛层析、Tricine-SDS-PAGE、Western-blotting、凝集实验、抑菌实验和Edman N端测序等方法探索血蓝蛋白酶解多肽的凝集和抑菌活性.结果发现,血蓝蛋白经胰蛋白酶酶解后可产生分子量约为6—70 kD的7条多肽,该酶解混合物对副溶血弧菌(Vibrio parahaemolyticus)具有显著的凝集活性,与未酶解的血蓝蛋白相比,其凝集活性可提高4—16倍.在此基础之上,进一步分离纯化该7条多肽,发现多肽-3对副溶血弧菌表现出较强的抑菌活性,且具有较好的浓度依赖性.在浓度为75μg/mL时,其抑菌率为(93.76±1.60)%,与阴性对照组相比,存在极显著性差异(P<0.01).进一步研究显示该多肽位于血蓝蛋白N端α-螺旋区域.由此推测,凡纳滨对虾血蓝蛋白在体外经胰蛋白酶酶解后可产生具有凝集、抑菌等免疫活性的多肽,这对研究血蓝蛋白的降解机制及其在先天免疫中的作用具有重要意义.%Previous studies have demonstrated antibacterial and antifungal activities of hemolymph-derived hemocyan-in upon pathogen infection with unknown mechanisms. To investigate how peptides derive from hemocyanin, multiple methods including size-exclusion chromatography, Tricine-SDS-PAGE, immunoblotting, bacterial agglutinative and antibacterial assays were applied. The results showed that shrimp Litopenaeus vannamei hemocyanin could produce seven peptides via trypsin digestion, ranging from 6 to 70 kD, which could be identified by rabbit anti-shrimp hemoc-yanin antibody specifically. These peptides aggregated with Vibrio parahaemolyticus in vitro, whose agglutinative acti-vity was 4—16 folds higher than that of full length hemocyanin. The peptide 3 possessed obvious antibacterial activit-ies against V. parahaemolyticus with a antibacterial rate (93.76±1.60)% at the concentration of 75 μg/mL, which was significantly higher than that of the control group (P<0.01). In addition, N-terminal Edman Sequencing analysis showed that the peptide 3 was located in the α-helix region of N-terminus of shrimp L. vannamei hemocyanin small subunit. These discoveries will help to understand how the hemocyanin derived peptides are formed and to establish effective strategies for shrimp disease control.
    • 李俊烨; 宋巧珍; 张亦陈; 刘逸尘; 耿绪云; 孙金生
    • 摘要: As a family of carbohydrate binding proteins with Ca2+, C-type lectins play important roles in the first line of innate immune defense.In this research, a novel C-type lectin gene (LvLc1, GenBank Accession Number:KY937940) was cloned from Litopenaeus vannamei according to the data of shrimp transcriptome in our lab.The full-length cDNA consists of 1251 bp with an 891 bp open reading frame, encoding 296 amino acids.The deduced amino acid sequence contains a putative signal peptide of 19 amino acids.It also contains one carbohydrate recognition domains/C-type lectin-like domains (CRD).The potential carbohydrate-binding motif (QPD) presented in the CRD ofLvLc1 may support its ability to bind galactose-type sugars.The deduced amino acid sequence of LvLc1 showed high identity with mannose-binding lectins of arthropod Procambarus clarkii and Pacifastacus leniusculus.It could be deduced thatLvLc1 is a novel member of C-type lectin superfamily.The recombinant target protein (rLvLc1) was expressed by prokaryotic expression system.The LC-ESI-MS analysis showed that the peptide fragments of rLvLc1 were identical with the corresponding sequence of L.vannamei C-type lectin.rLvLc1 had agglutinating activity against main pathogens (G+, G– and fungi) in aquaculture in a calcium-dependent manner.The agglutinating activity can be inhibited by multiple carbohydrates, such as galactose, mannose and lipopolysaccharide.These results suggest thatLvLc1, as a Ca2+ dependent carbohydrate-recognition protein, is one of the important PRRs.It might play a crucial role in the innate immunity of the shrimp and it is expected to be applied to disease control.%C型凝集素是一种依赖于Ca2+而发挥功能的糖蛋白,在一线的固有免疫防御过程中发挥着重要作用.围绕对虾C型凝集素开展深入研究,不仅可以丰富无脊椎动物固有免疫学内容,还有望将其开发为具有免疫增强效果的活性饵料,应用于对虾的健康养殖.本实验根据实验室前期转录组信息提示克隆获得了凡纳滨对虾一种新的C型凝集素基因(LvLc1,GenBank注册号:KY937940).生物信息学分析显示LvLc1基因的开放阅读框全长891 bp,编码296个氨基酸,该基因编码的蛋白质含有一个保守的糖识别结构域(carbohydrate recognition domain,CRD),该结构域中具有潜在的半乳糖结合位点(QPD motif),进化发生分析显示LvLc1与来自节肢动物的甘露糖结合凝集素家族成员聚类在一起.对LvLc1基因的CRD结构域进行了原核重组表达与蛋白活性分析研究,结果显示:重组目的蛋白(rLvLc1)在Ca2+存在的条件下,对多种病原菌(G+、G–和真菌)具有凝集作用,其凝集活性可被半乳糖、甘露糖、脂多糖等多种病原相关分子模式所抑制.研究表明,LvLc1作为C-型凝集素家族一个新成员,可能通过重要的模式识别受体作用,参与机体应答病原微生物侵染的防御过程.
    • 赵雪; 宋文刚
    • 摘要: Objective To study the effects of reFIP-fve on spleen lymphocytes proliferation,interleukin-2( IL-2) secretion from spleen lymphocytes,and on the blood cells agglutination in mice. Method The reFIP-fve was purified through ion exchange chromatography, by using SP Sepharose XL column. MTT method was used to detect the effects of the purified protein on spleen cells proliferation and blood cells agglutination. And the function of reFIP-fve in cytokine secretion from lymphocytes was tested by ELISA method. Results A purity of 86% recombinant protein could be obtained by using SP Sepharose XL column. The purified protein could enhance maximum cell proliferation in the concentration of 80μg/mL,and clotting appeared in the concentration of 2 μg/mL. ELISA showed that the protein significantly enhanced the secretion level of IL-2 from spleen lymphocytes in mice. Conclusion A high purity protein could be obtained through SP Sepharose XL column. When co-cultured with spleen lymphocytes, the purified protein could promote spleen cells proliferation, and enhance the secretion of IL-2 as well. The protein co-cultured with blood cells can accelerate blood cell agglutination.%目的:研究重组的金针菇免疫调节蛋白( reFIP-fve)对小鼠脾淋巴细胞的增殖作用、诱导小鼠脾淋巴细胞对白细胞介素-2( IL-2)的促分泌作用及对血细胞的凝集作用。方法采用离子交换色谱法,利用SP Sepharose XL色谱柱纯化重组的免疫调节蛋白;将纯化后的蛋白作用于小鼠脾淋巴细胞和血细胞,用MTT法检测蛋白对脾细胞增殖和血细胞凝集的影响;用 ELISA 法检测蛋白对淋巴细胞分泌细胞因子的作用。结果经过 SP Sepharose XL色谱柱纯化后可获得纯度为86%的重组蛋白;纯化蛋白浓度在80μg/mL时最大限度促进细胞增殖;蛋白浓度在2μg/mL时开始出现凝血;ELISA检测结果显示:重组的金针菇免疫调节蛋白能明显增强小鼠脾淋巴细胞分泌白细胞介素2(IL-2)的水平。结论经过SP Sepharose XL色谱柱纯化后可获得纯度较高的蛋白;纯化后的蛋白与小鼠脾淋巴细胞共同培养,不仅可以促进脾细胞的增殖,而且能增强小鼠脾淋巴细胞分泌白细胞介素2的水平;蛋白与血细胞共同培养能够促进血细胞的凝集
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