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Infection and Immunity, November 1999, p. 6187-6190, Vol. 67, No. 11
0019-9567/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.

Purification and Immunoreactivity of Three Components from the 30/32-Kilodalton Antigen 85 Complex in Mycobacterium tuberculosis

Jae-Hyun Lim, Jeong-Kyu Park, Eun-Kyeong Jo, Chang-Hwa Song, Dullei Min, Young-Ja Song, and Hwa-Jung Kim*

Department of Microbiology, College of Medicine, Chungnam National University, Taejeon 301-131, Korea

Received 17 May 1999/Returned for modification 1 July 1999/Accepted 24 August 1999

The three proteins of the antigen 85 complex (85A, 85B, and 85C), which are major secretory products of Mycobacterium tuberculosis, were purified to homogeneity in large amounts by a combination of chromatography on hydroxylapatite, DEAE-Sepharose, and DEAE-Sephacel and gel filtration from M. tuberculosis culture filtrate. Then we examined the immunological reactivity of the three proteins in tuberculosis patients and healthy controls. Antibody responses to the 85B and 85A proteins in patients were significantly greater than responses to the 85C protein. In contrast, all three antigens induced significant lymphoproliferation and gamma interferon production in peripheral blood mononuclear cells from healthy tuberculin reactors.

* Corresponding author. Mailing address: Department of Microbiology, College of Medicine, Chungnam National University, 6 Munwha-Dong, Chung-Ku, Taejeon 301-131, Republic of Korea. Phone: 82-42-580-8242. Fax: 82-42-585-3686. E-mail: hjukim{at}hanbat.chungnam.ac.kr.

Infection and Immunity, November 1999, p. 6187-6190, Vol. 67, No. 11
0019-9567/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.


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