Composition for diagnosing latent tuberculosis comprising antigen with improved antigenicity and stability
The present invention relates to a composition containing an antigen with improved antigenicity and stability for diagnosing latent tuberculosis. In the case of the QuantiFERON-TB test, which is a currently actively used latent tuberculosis diagnostic kit, the antigen is fixed in a tube and reacted,...
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Zusammenfassung: | The present invention relates to a composition containing an antigen with improved antigenicity and stability for diagnosing latent tuberculosis. In the case of the QuantiFERON-TB test, which is a currently actively used latent tuberculosis diagnostic kit, the antigen is fixed in a tube and reacted, and if the titer is improved, a sufficient immune response can be induced even with a small amount. In the case of an antigen of the present invention, accurate results can be obtained because stability is guaranteed for about 4 days even at 37℃, which is the reaction temperature with blood. A mutant antigen obtained by the present invention had a two-fold improvement in antigen titer compared to the existing wild type, and improved stability for about 10 days at 4℃ and 4 days at 37℃ were confirmed. The composition for diagnosing latent tuberculosis comprises ESAT6-CFP10 recombinant antigen, which has an amino acid sequence represented by SEQ ID NO: 1, SEQ ID NO: 2, or SEQ ID NO: 3 as an active ingredient.
본 발명은 항원성 및 안정성이 개선된 항원을 포함하는 잠복결핵 진단용 조성물에 관한 것으로서, 현재 활발히 사용하는 잠복결핵 진단 키트인 QuantiFERON-TB 테스트의 경우, 항원을 튜브에 고정하여 반응하는 방식으로 항원의 역가가 개선될 경우 적은 양으로도 충분한 면역반응을 유도할 수 있다. 본 발명의 항원의 경우, 혈액과의 반응온도인 37℃에서도 4일 정도는 안정성이 확보된 상태임으로 정확한 결과를 획득할 수 있다. 본 발명으로 얻은 변이체 항원은 기존의 야생형보다 항원역가는 2배 개선되었으며, 4℃에서는 10일 정도의 안정성과 37℃에서 4일 안정성이 개선된 효과를 확인하였다. |
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