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- W1969346903 abstract "There is a need to develop an improved anti-TB vaccine for adequate control and elimination of tuberculosis, to control the spread of MDR-TB and TB/HIV co-infection. Studies in children have indicated that BCG vaccination has certain beneficial effects, especially against miliary TB and TB meningitis, but needs to be improved for protection against pulmonary tuberculosis.The aim of the present study was to identify the immunogenic proteins in the culture filtrate (CF) of Mycobacterium bovis BCG by studying the effector mechanism of protection in children, which may help in the formulation of an effective vaccine against tuberculosis.Lymphoproliferative responses (LTT) and the levels of IL-2 and IFN-gamma (Th1 cytokines) released into the culture supernatants were estimated (by ELISA) in short-term cultures of PBMC of BCG vaccinated (n=25) and unvaccinated (n=15) children and children with tuberculosis (n=15) against 10 different fractions of CF (mol.wt > or = 90-<14 kDa).The mean stimulation indices (SI) in LTT against all the (10) fractions in vaccinated children were high when compared to the unvaccinated and diseased groups; however, of the 10 fractions, F3, F4, F6, F8 and F9 elicited significantly higher SIs than the other fractions (p<0.05). In the vaccinated children, the SI (5.58+/-1.57), levels of IL-2 (381.66+/-16.40 pg/ml) and IFN-gamma (732+/-62.36 pg/ml) in the cultures stimulated by fraction 8 (34-30k Da) were significantly higher (p<0.001), than responses to the other fractions and also to those of other groups of children.Thus, the peptides within the cluster 34-30 kDa appear to be promising vaccine candidates by virtue of their immunodominant nature specifically priming Th1 cells in normal, BCG-vaccinated children." @default.
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- W1969346903 date "2005-01-01" @default.
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- W1969346903 title "Cell-mediated immune responses in children towards secreted proteins of Mycobacterium bovis BCG" @default.
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- W1969346903 doi "https://doi.org/10.1016/j.tube.2004.09.010" @default.
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