Modified Gram negative bacteria for use as vaccine and adjuvant - are transformed to express lytic protein or toxin, forming ghost(s) which present many cell wall epitope(s)

摘要

Modified bacteria, obtd. by (1) transforming a Gram negative bacterium with (a) the gene of a lytic membrane protein of a bacteriophage, (b) a lytic toxin-release gene or (c) their partial sequences which code for lytic proteins; (2) culturing the bacteria, (3) expressing the lytic genes and (4) isolation from the culture broth, are used as vaccines or adjuvants. - Pref. during culture, activation of the gene is inhibited or expression is repressed, and lifted only at selected times. The lytic gene is the DNA sequence for the E or L proteins (or their membrane-penetrating domains) or the EL-hybrid protein, or their active partial sequences.