Inventors:
Sarkis K. Mazmanian - Porter Ranch CA, US
Sung-Eun Lee - Los Angeles CA, US
Dennis L. Kasper - Charlestown MA, US
Assignee:
The Brigham and Women's Hospital, Inc. - Boston MA
California Institute of Technology - Pasadena CA
International Classification:
C12N 15/74
US Classification:
424 932, 4352523, 5361231, 424780
Abstract:
Provided is an isolated bacterial cell producing a native capsular polysaccharide A (PSA), wherein the cell is incapable of producing capsular polysaccharides PSB, PSC, PSD, PSE, PSF, PSG, and PSH because the cell's biosynthetic genes for native capsular polysaccharides PSB, PSC, PSD, PSE, PSF, PSG, and PSH have been deleted from the cell's genome. The isolated isolated or wild type , or an extract obtained from said cell, can be used to treat individuals with inflammation.