Mycobacterium tuberculosis is an adaptable intracellular pathogen, existing in both dormant as well as active disease-causing states. Here, we report systematic proteomic analyses of four strains, H37Ra, H37Rv, and clinical isolates BND and JAL, to determine the differences in protein expression patterns that contribute to their virulence and drug resistance. Resolution of lysates of the four s...

.......................................................................................................... 1 Populärvetenskaplig sammanfattning ................................................................ 3 List of papers ................................................................................................... 5 Abbreviations ..........................................................

Mycobacterium tuberculosis infection elicits antigen-specific CD8(+) T cells that are required to control disease. It is unknown how the major histocompatibility complex class I (MHC-I) pathway samples mycobacterial antigens. CFP10 and ESAT6 are important virulence factors secreted by M. tuberculosis, and they are immunodominant targets of the human and murine T-cell response. Here, we test the...

Promoting effective immunity to Mycobacterium bovis infection is a challenge that is of interest to the fields of human and animal medicine alike. We report that γδ T cells from virulent M. bovis-infected cattle respond specifically and directly to complex, protein, and nonprotein mycobacterial Ags. Importantly, to our knowledge, we demonstrate for the first time that bovine γδ T cells specific...

To evaluate antigen-specific proliferative and activation-associated responses from Mycobacterium bovis-infected reindeer, blood mononuclear cells from M. bovis- (n = 10) and non-infected reindeer (n = 4) were stimulated with a recombinant early secretory antigenic target-6 and culture filtrate protein-10 fusion protein (rESAT6:CFP10), M. bovis purified protein derivative, pokeweed mitogen, or ...

BACKGROUND The acid-fast bacillus Mycobacterium tuberculosis is often the first manifestation of acquired immunodeficiency syndrome in patients infected with human immunodeficiency virus (HIV). This study was conducted to better understand the mechanism underlying M. tuberculosis-specific pathogenicity early after onset of HIV infection. METHODS M. tuberculosis-specific T helper 1 (Th1) cells...

Detection of Mycobacterium tuberculosis (MTB) infection by delayed-type hypersensitivity skin test with purified derivative (PPD) antigen is still used in many countries including Thailand. However, it is less specificity due to significant cross-reactivity with non-tuberculosis mycobacteria. Antigen such as early secretory antigenic target (ESAT6) is secreted in the early phase of infection an...

Whether true memory T cells develop in the face of chronic infection such as tuberculosis remains controversial. To address this question, we studied CD8+ T cells specific for the Mycobacterium tuberculosis ESAT6-related Ags TB10.3 and TB10.4. The shared epitope TB10.3/10.4(20-28) is presented by H-2 K(d), and 20-30% of the CD8+ T cells in the lungs of chronically infected mice are specific for...

PURPOSE To preliminarily evaluate the immunogenicity and efficacy of the recombinant tuberculosis vaccine AEC/BC02 in which Ag85b and fusion protein ESAT6-CFP10 were combined with bacillus Calmette-Guérin CpG and an aluminum salt-based adjuvant system. METHODS Groups of BALB/c mice were immunized intramuscularly three times at 10-day intervals with AEC/BC02 or the adjuvant alone and the vacci...

New strategies are needed to develop better tools to control TB, including identification of novel antigens for vaccination. Such Mtb antigens must be expressed during Mtb infection in the major target organ, the lung, and must be capable of eliciting human immune responses. Using genome-wide transcriptomics of Mtb infected lungs we developed data sets and methods to identify IVE-TB (in-vivo ex...