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

Chemistry: molecular biology and microbiology – Micro-organism – per se ; compositions thereof; proces of... – Bacteria or actinomycetales; media therefor

Reexamination Certificate

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C435S252300, C424S093200, C424S093400, C424S248100

Reexamination Certificate

active

07666656

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 endosomolytic 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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