Kalra Mamta, Khuller Gopal Krishen, Sheikh Javaid Ahmad, Verma Indu
Department of Biochemistry, Post Graduate Institute of Medical Education and Research, Chandigarh 160012, India.
Indian J Exp Biol. 2010 Feb;48(2):117-23.
Tuberculin skin test (TST), an age old method is based on measuring delayed-type hypersensitivity (DTH) response to purified protein derivative (PPD). However, inspite of simplicity, ease and cost effectiveness, the usefulness of PPD test is limited due to its inability to distinguish among a protective immune response, latent infection and active tuberculosis disease. On the other hand, a skin test based on RD antigens would add advantages of a high specificity of antigens with the logistics of a skin test. However, except few reports, in vivo data of intradermal use of RD antigens for skin testing is limited. Therefore, in the present study, four M. tuberculosis (Mtb) specific antigens (ESAT6, CFP10, CFP21 and MPT64) were evaluated for their diagnostic utility based on DTH response. These antigens alone and their multiple combinations induced strong DTH response in Mtb infected guinea pigs and the response was negligible in BCG vaccinated and sham immunized animals.
结核菌素皮肤试验(TST)是一种古老的方法,基于测量对纯化蛋白衍生物(PPD)的迟发型超敏反应(DTH)。然而,尽管PPD试验简单、易行且具有成本效益,但由于其无法区分保护性免疫反应、潜伏感染和活动性结核病,其用途有限。另一方面,基于RD抗原的皮肤试验将兼具抗原高特异性和皮肤试验便利性的优点。然而,除了少数报告外,皮内使用RD抗原进行皮肤试验的体内数据有限。因此,在本研究中,基于DTH反应评估了四种结核分枝杆菌(Mtb)特异性抗原(ESAT6、CFP10、CFP21和MPT64)的诊断效用。这些抗原单独使用及其多种组合在感染Mtb的豚鼠中诱导了强烈的DTH反应,而在接种卡介苗和假免疫动物中反应可忽略不计。
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