Projects per year
Abstract
Nontyphoidal Salmonellae are a major cause of life-threatening bacteremia among HIV-infected individuals. Although cell-mediated immunity controls intracellular infection, antibodies protect against Salmonella bacteremia. We report that high-titer antibodies specific for Salmonella lipopolysaccharide (LPS) are associated with a lack of Salmonella-killing in HIV-infected African adults. Killing was restored by genetically shortening LPS from the target Salmonella or removing LPS-specific antibodies from serum. Complement-mediated killing of Salmonella by healthy serum is shown to be induced specifically by antibodies against outer membrane proteins. This killing is lost when excess antibody against Salmonella LPS is added. Thus, our study indicates that impaired immunity against nontyphoidal Salmonella bacteremia in HIV infection results from excess inhibitory antibodies against Salmonella LPS, whereas serum killing of Salmonella is induced by antibodies against outer membrane proteins.
Original language | English |
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Pages (from-to) | 508-512 |
Number of pages | 5 |
Journal | Science |
Volume | 328 |
Issue number | 5977 |
DOIs | |
Publication status | Published - 1 Apr 2010 |
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Dive into the research topics of 'Dysregulated Humoral Immunity to Nontyphoidal Salmonella in HIV-Infected African Adults'. Together they form a unique fingerprint.Projects
- 4 Finished
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MRC Centre For Immune Regulation (Linked to DCDF.RRAK10540) (Linked to 14810 & 14835)
Jenkinson, E. (Principal Investigator)
3/08/09 → 30/09/17
Project: Research Councils
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Activities of Salmonella Flagellin: FliCing Immunity On and Off and from Th1 to Th2
Cunningham, A. (Principal Investigator)
Biotechnology & Biological Sciences Research Council
19/12/08 → 18/12/11
Project: Research Councils
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A Bug in the System: How Does Salmonella Induce Novel B Cell Responses?
Cunningham, A. (Principal Investigator)
27/10/08 → 26/10/11
Project: Research Councils
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The Development of Cellular Therapy for the Correction of CMV-Specific Immunodeficiency After Stem Cell Transplantation
Cobbold, M. (Principal Investigator)
1/07/03 → 31/07/09
Project: Research Councils