Methods for diagnosis of tuberculosis

Details Methods for diagnosis of tuberculosis Methods for diagnosis of tuberculosis

C - Chemistry, Metallurgy

07

H

167/137, 167/37,

C07H 21/00 (2006.01) A61K 39/04 (2006.01) C07K 7/04 (2006.01) C07K 14/35 (2006.01) C07K 16/12 (2006.01) C12Q 1/68 (2006.01) G01N 33/569 (2006.01) A61K 38/00 (2006.01) A61K 39/00 (2006.01)

Patent

CA 2033042

Abstract Disclosed are the immunochemical properties of a 17 kDa protein antigen fractionated, purified and sequenced for amino acids from Mycobacterium tuberculosis (South Indian isolate, SII 1) which causes human tuberculosis worldwide among 16 million patients. The 17 kDa protein antigen which has an N-terminus of A T T L P V Q R (aa 1-8) has atleast three specific antibody binding epitopes located on linear peptides of sequences, R A T Y D K R Y E V R (aa 91-101) and S E F A Y G S F V R (aa 68-77) which were useful in a micro ELISA for the early diagnosis of human tuberculosis by the detection of specific antibodies. The 17 kDa protein antigen which was mitogenic for human tuberculous peripheral blood lymphocytes was found to carry three predicted T-cell epitopes on linear peptides of sequences, S E F A Y G S F V R (aa 68-77) and A E L P G V D P D C D V C I T R (aa 107-122). The 17 kDa antigen of M. tuberculosis (SII 1) which thus had both B and T cell reactive properties was found to contain 131 amino acids and potentially applicable in the immuno diagnosis, immuno therapy and immuno prophylaxis of human tuberculosis.

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