排序方式: 共有31条查询结果,搜索用时 37 毫秒
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研究不同品种牛血清对3T3-L1细胞增殖与分化的影响,采用模型细胞体外培养法模拟牛脂肪组织生长环境,为牛大理石纹肉早期选择提供一种可能性的方法。抽取17头秦川牛和28头秦杂牛血清,先制备没灭活和灭活血清组培养细胞,MTT法检测细胞增殖相对数,油红O检测脂肪含量,再用不同品种牛血清培养细胞,检测细胞增殖相对数和脂肪含量,以及用比色法测定三磷酸甘油脱氢酶(GPDH)和脂肪酸合成酶(FAS)活性。结果表明,灭活血清培养细胞的增殖相对数量在分化培养第2和4天与分化脂肪含量在第2、4、6和8天都极显著高于没灭活血清组 (P<0.01);秦杂牛血清培养细胞的数量在第2和4天显著高于秦川牛 (P<0.05),秦川牛血清培养细胞分化的脂肪含量在第8天显著高于秦杂牛 (P<0.05),其他天数没有显著性差异 (P>0.05);分化第8天的细胞内GPDH和FAS酶活两牛种间没有显著性差异 (P>0.05)。结果显示自制血清灭活比没灭活的更利于细胞的培养;牛血清品种是影响前脂肪细胞增殖与分化的因素,秦杂牛血清可能更有利于前脂肪细胞的增殖,而秦川牛血清可能更有利于前脂肪细胞的分化,但仍需进一步研究。 相似文献
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间接酶联免疫吸附试验检测猪生殖与呼吸系统综合征血清抗体的研究 总被引:2,自引:0,他引:2
本研究建立了检测猪生殖与呼吸系统综合征(PRRS)血清抗体的间接酶联免疫吸附试验(ELISA),其抗原包被浓度为2μg/ml,血清最适稀释度为1∶100。试验结果表明:ELISA的敏感性高于间接免疫荧光抗体试验(IFA),是一种切实可行的诊断方法。 相似文献
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G Charlier R Strobbe A Van Aert J Leunen 《Comparative immunology, microbiology and infectious diseases》1981,4(3-4):279-283
A method for PEG treatment of bovine sera to be used for cell cultures is presented. The procedure consists in repeated freezing and thawing cycles of the sera, after PEG precipitation until a clear solution is obtained. The sera, so prepared, are homogeneous in composition and appropriate for cell growth in primary cell cultures and cell lines. 相似文献
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目的:制备兔抗伤寒杆菌Fe-SOD血清,并研究其对鼠伤寒杆菌攻击小鼠的免疫保护作用,探讨SOD与沙门氏菌致病性的关系。方法:用纯化的伤寒杆菌Fe-SOD免疫家兔,制备兔抗SOD血清,并用ELIS法检测抗血清效价;免疫电泳、双向琼脂扩散试验和抗血清对酶活笥抑制试验检测抗血清的特异性。将所制备的抗血清与鼠伤寒杆菌混合,放37℃30min,经腹腔注入小鼠体内,并观察3天和7天小鼠的存活情况,以确定抗血清 相似文献
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Trine H Jensen Gitte Ajjouri Kurt J Handberg Marek J Slomka Vivien J Coward Martine Cherbonnel Véronique Jestin Peter Lind Poul H J?rgensen 《Acta veterinaria Scandinavica》2013,55(1):84
Background
Avian influenza virus (AIV) subtypes H5 and H7 attracts particular attention because of the risk of their potential pathogenicity in poultry. The haemagglutination inhibition (HI) test is widely used as subtype specific test for serological diagnostics despite the laborious nature of this method. However, enzyme-linked immunosorbent assays (ELISAs) are being explored as an alternative test method.H5 and H7 specific monoclonal antibodies were experimentally raised and used in the development of inhibition ELISAs for detection of serological response specifically directed against AIV subtypes H5 and H7. The ELISAs were evaluated with polyclonal chicken anti-AIV antibodies against AIV subtypes: H1N2, H5N2, H5N7, H7N1, H7N7, H9N9, H10N4 and H16N3.Results
Both the H5 and H7 ELISA proved to have a high sensitivity and specificity and the ELISAs detected H5 and H7 antibodies earlier during experimental infection than the HI test did. The reproducibility of the ELISA’s performed at different times was high with Pearson correlation coefficients of 0.96-0.98.Conclusions
The ELISAs are a potential alternative to the HI test for screening of large amounts of avian sera, although only experimental sera were tested in this study. 相似文献8.
H Erno 《Acta veterinaria Scandinavica》1977,18(2):176-186
It would be an advantage, under many circumstances, to be able to make use of polyvalent antisera in the process of identifying mycoplasmas. As the indirect immunofluorescence test is sufficiently sensitive and also generally accepted as being rather specific, this technique was chosen to investigate whether polyvalent antisera are applicable in routine identification of mycoplasmas. Three polyvalent sera were used, each consisting of 9 or 10 rabbit antisera raised against 29 of the more common species of the genus Mycoplasma. Twenty-six field strains were examined. One strain did not react with any of the 3 polyvalent antisera although it was later identified as M. bovigenitalium. The remaining 25 strains reacted with 1 and only 1 of the polyvalent antisera and were subsequently identified by immunofluorescence utilizing monospecific antisera. Strains of the following species were identified: M. arginini, M. bovigenitalium, M. bovis, M. bovoculi, M. canis, M. capricolum, M. cynos, M. edwardii, M. hominis, M. hyorhinis, M. molare, M. mycoides subsp. mycoides and M. opalescens. It is concluded that polyvalent antisera may be used in identification procedures and thereby permit the use of a limited number of monospecific antisera without preceding biochemical testing. 相似文献
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采用淋巴细胞杂交瘤技术,研制出的抗衣原体单克隆抗体,应用酶联免疫吸附试验(ELISA)方法,对本地区所采用的698份羊血清进行检测,羊血清阳性检出率为22.06%,选择50份羊血清用已建立的检测衣原体抗体ELISA方法与传统的间接血凝试验(IHA)进行比较,其敏感性高。羊血清ELISA阳性检出率为26%,IHA为22%,前者比IHA高出4个百分点。 相似文献
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利用已克隆的BALB/c小鼠Doppel蛋白基因,将其成熟蛋白编码区亚克隆至表达载体pGEX-6P-1上,构建重组表达质粒pGEX-6P-1-PRND。将重组蛋白表达载体转入E.coli BL21(DE3)中诱导表达,SDS-PAGE及Western blot分析结果表明,BALB/c小鼠Doppel蛋白在大肠杆菌中以包涵体形式高效表达。对表达的蛋白进行提取和纯化并免疫新西兰大白兔制备兔抗血清,初步建立了小鼠睾丸Doppel蛋白组织学分布的免疫组织化学方法。为进一步研究Doppel的结构、功能及其在TSEs发生发展中的作用提供基础材料和数据。 相似文献