Gonococcal porin vaccine evaluation: comparison of Por proteosomes, liposomes, and blebs isolated from rmp deletion mutants.
The gonococcal major outer membrane protein, Por (protein I), is a potential vaccine candidate. A large-scale animal trial compared the immunogenicity of Por inserted in liposomes (mimicking its in vivo structure) with previously used vaccines containing Por. Por was purified from Rmp (protein III)-negative gonococcal mutants and made into five different formulations: proteosomes, proteosomes absorbed to alum, liposomes, gonococcal membrane blebs, and gonococcal membrane blebs absorbed to alum. Por liposomes induced the greatest amount of Por antibodies; proteosomes and both preparations of blebs induced minimal amounts of Por antibodies. Proteosomes absorbed to alum induced slightly lower amounts of Por antibodies than did liposomes, especially when protein IA was used. Whole-organism absorption studies revealed that a significantly greater percentage of liposome-induced Por antibodies recognized exposed portions of the protein than did proteosome- or proteosome/alum-induced antibodies.
Wetzler
L M
LM
Laboratory of Bacterial Pathogenesis and Immunology, Rockefeller University, New York.
Blake
M S
MS
Barry
K
K
Gotschlich
E C
EC
D000276:Adjuvants, Immunologic; D000818:Animals; D001425:Bacterial Outer Membrane Proteins / Q000235:genetics / Q000276:immunology*; D001428:Bacterial Vaccines / Q000276:immunology*; D002462:Cell Membrane / Q000276:immunology; D005260:Female; D008081:Liposomes / Q000276:immunology; D009154:Mutation; D009344:Neisseria gonorrhoeae / Q000276:immunology*; D018272:Porins; D011510:Proteolipids / Q000276:immunology; D011817:Rabbits
D000276:Adjuvants, Immunologic; D001425:Bacterial Outer Membrane Proteins; D001428:Bacterial Vaccines; D008081:Liposomes; D018272:Porins; D011510:Proteolipids; C057699:porin protein, Neisseria; C020485:proteoliposomes