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Differential B-Cell Responses Are Induced by Mycobacterium tuberculosis PE Antigens Rv1169c, Rv0978c, and Rv1818c

Narayana, Yeddula and Joshi, Beenu and Katoch, VM and Mishra, Kanhu Charan and Balaji, Kithiganahalli N (2007) Differential B-Cell Responses Are Induced by Mycobacterium tuberculosis PE Antigens Rv1169c, Rv0978c, and Rv1818c. In: Clinical and Vaccine Immunology (formerly CDLI), 14 (10). pp. 1334-1341.

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Abstract

The multigene PE and PPE family represents about 10% of the genome of Mycobacterium tuberculosis. Here, we report that three members of the PE family, namely, Rv1169c, Rv0978c, and Rv1818c, elicit a strong, but differential, B-cell humoral response among different clinical categories of tuberculosis patients. The study population (n = 211) was comprised of different clinical groups of both adult and child patients: group 1 (n = 94) patients with pulmonary infection, group 2 (n = 30) patients with relapsed infection, group 3 (n = 31) patients with extrapulmonary infections, and clinically healthy donors (n = 56). Among the PE proteins studied, group 1 adult patient sera reacted to Rv1818c and Rv0978c, while Rv1169c elicited immunoreactivity in group 3 children. However, all three PE antigens studied as well as the 19-kDa antigen did not demonstrate humoral reactivity with sera from group 2 patients with relapsed infection. The current study shows that while responsiveness to all three PE antigens is a good marker for M. tuberculosis infection, a strong response to Rv0978c or to Rv1818c by group 1 adult patients with pulmonary infection or largely restricted reactivity to Rv1169c antigen in child patients with extrapulmonary infections offers the possibility of differential utility in the serodiagnosis of tuberculosis.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to American Society for Microbiology.
Department/Centre: Division of Biological Sciences > Microbiology & Cell Biology
Date Deposited: 23 Jul 2008
Last Modified: 19 Sep 2010 04:41
URI: http://eprints.iisc.ernet.in/id/eprint/12506

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