Recombinant BCG strains with enhanced ability to escape the...

Chemistry: molecular biology and microbiology – Process of mutation – cell fusion – or genetic modification – Introduction of a polynucleotide molecule into or...

Reexamination Certificate

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C435S476000, C435S489000, C435S490000

Reexamination Certificate

active

08043857

ABSTRACT:
Mycobacteriumstrains that have an enhanced ability to elicit a MHC-Class I-restricted CD8+T cell immune response are provided. TheMycobacteriumstrains are genetically engineered to express: a endosomalytic protein that is active at neutral pH (e.g. Perfringolysin O), permitting escape of theMycobacteriumfrom endosomes into the cytoplasm of the cell; and antigens of interest, such as tuberculosis antigens. The invention also provides vaccine preparations containing suchMycobacteriumstrains.

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