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    • 5. 发明申请
    • A NEW SPECIFIC EPITOPE BASED IMMUNOLOGICAL DIAGNOSIS OF TUBERCULOSIS
    • 基于新的特异性抗原决定基的免疫组织化学诊断
    • WO2004099771A1
    • 2004-11-18
    • PCT/DK2004/000314
    • 2004-05-06
    • STATENS SERUM INSTITUTANDERSEN, PeterBROCK, IngerWELDINGH, Karin
    • ANDERSEN, PeterBROCK, IngerWELDINGH, Karin
    • G01N33/50
    • G01N33/6812C07K14/35G01N33/505G01N33/5695
    • The current used method for immunological diagnosis of tuberculosis infection, the tuberculin skin test, is problematic for a number of reasons; it has low specificity in BCG vaccinated individuals, a high interobserver variance and requires skill to be read and interpreted. Furthermore it requires an extra visit to the clinic to have the test read. Both people vaccinated with BCG and those exposed to non-tuberculosis mycobacteria give a positive skin test result similar to that seen in a TB infected individual. This also applies for purified protein derivative (PPD) when used in a blood cell based test. The present invention disclosed the development of an immunological TB diagnostic tool based on a combination of epitopes from proteins encoded by regions of the M. Tuberculosisi (M. tub) genome, that are not present in the BCG vaccine strain or in the most common non-tuberculosis mycobacteria. Four recently characterized proteins with this diagnostic potential were selected. Peptides from these proteins were tested one by one with peripheral blood mononuclear cells from microscopy or culture confirmed TB patients as well as from healthy BCG vaccinated controls. Some combinations of peptides showed a sensitivity level comparable to the level seen with these peptides combined with ESAT 6 and CFP 10 gave a sensitivity of 93% representing a raise in sensitivity of about 26-33% compared to using ESAT6 or CFP10 alone. The results from a panel of TB patients, using a collection of the new specific epitopes clearly demonstrates, the addition of other specific epitopes to the already known specific antigens, increases the sensitivity of a diagnostic assay based on cell mediated immune response.
    • 目前使用的结核菌感染免疫诊断方法,结核菌素皮肤试验,有其原因有问题; 它在BCG接种个体中具有低特异性,具有高的观察者间差异,并且需要阅读和解释技能。 此外,还需要额外访问诊所以进行测试。 接种BCG的人和暴露于非结核分枝杆菌的两个人都能获得与TB感染个体相似的阳性皮肤试验结果。 当用于基于血细胞的试验中时,这也适用于纯化的蛋白质衍生物(PPD)。 本发明公开了免疫结核病诊断工具的开发,该工具基于由结核分枝杆菌(M.Buberculosisi,M.Bob)的基因组区域编码的蛋白质的表位的组合,其不存在于BCG疫苗株或最常见的非 - 结核分枝杆菌。 选择了具有该诊断潜力的四种最近鉴定的蛋白质。 使用来自显微镜或培养物确认的TB患者以及来自健康的BCG接种对照的外周血单核细胞逐个测试来自这些蛋白质的肽。 肽的一些组合显示出与这些肽结合ESAT 6所观察到的水平相当的灵敏度水平,与单独使用ESAT6或CFP10相比,CFP 10具有93%的敏感性,表示灵敏度升高约26-33%。 使用新的特异性表位的一组结核病患者的结果清楚地表明,已经已知的特异性抗原的其他特异性表位的添加增加了基于细胞介导的免疫应答的诊断测定的灵敏度。