| Abstract: |
Using a rabbit model of tuberculous meningitis, we evaluated the protective efficacy of vaccination with the recombinant polyprotein Mtb72F, which is formulated in two alternative adjuvants, AS02A and AS01B, and compared this to vaccination with Mycobacterium bovis bacillus Calmette-Guérin (BCG) alone or as a BCG prime/Mtb72F-boost regimen. Vaccination with Mtb72F formulated in AS02A (Mtb72F+AS02A) or Mtb72F formulated in AS01B (Mtb72F+AS01B) was protective against central nervous system (CNS) challenge with Mycobacterium tuberculosis H37Rv to an extent comparable to that of vaccination with BCG. Similar accelerated clearances of bacilli from the cerebrospinal fluid, reduced leukocytosis, and less pathology of the brain and lungs were noted. Weight loss of infected rabbits was less extensive for Mtb72F+AS02A-vaccinated rabbits. In addition, protection against M. tuberculosis H37Rv CNS infection afforded by BCG/Mtb72F in a prime-boost strategy was similar to that by BCG alone. Interestingly, Mtb72F+AS01B induced better protection against leukocytosis and weight loss, suggesting that the polyprotein in this adjuvant may boost immunity without exacerbating inflammation in previously BCG-vaccinated individuals. Copyright © 2006, American Society for Microbiology. All Rights Reserved. |
| Keywords: |
controlled study; unclassified drug; nonhuman; animals; animal tissue; bcg vaccine; animal experiment; animal model; inflammation; body weight; weight reduction; drug screening; drug evaluation, preclinical; central nervous system; mycobacterium tuberculosis; bacterial proteins; cerebrospinal fluid; recombinant proteins; mycobacterium bovis; lung; immunostimulation; drug combinations; disease models, animal; adjuvants, immunologic; leukocytosis; saponins; immunization, secondary; adjuvant; central nervous system infection; bcg vaccination; rabbits; rabbit; immunity, active; polyprotein; aso1b vaccine; aso2a vaccine; mtb72f polyprotein vaccine; tuberculous meningitis; lipid a; tuberculosis vaccines; tuberculosis, meningeal
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