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Cholera Toxin-Specific Memory B Cell Responses Are Induced in Patients with Dehydrating Diarrhea Caused by Vibrio cholerae O1.
- Source :
- Journal of Infectious Diseases; 10/1/2008, Vol. 198 Issue 7, p1055-1061, 7p, 1 Chart, 5 Graphs
- Publication Year :
- 2008
-
Abstract
- Background. Infection with Vibrio cholerae induces durable immunity against subsequent disease, a process hypothesized to reflect anamnestic immune responses at the intestinal mucosa. The presence of antigen-specific memory B cells may therefore be a more direct measure of protection than serum antibody responses. Methods. We measured immunoglobulin (Ig) G memory B cells specific to cholera toxin B subunit (CTB) in 14 patients up to 90 days after V. cholerae O1 infection, by polyclonal stimulation of peripheral blood mononuclear cells followed by standard enzyme-linked immunospot assay. Results. All patients generated CTB-specific IgG memory B cell responses by day 30 (mean, 0.10% of total circulating IgG memory B cells; range, 0.037%-0.28%), which persisted to day 90 (mean, 0.07%; range, 0.003%- 0.27%). In contrast, circulating CTB-specific IgG antibody-secreting cells and serum vibriocidal and anti-CTB antibody responses peaked on day 7 and declined to undetectable or significantly lower levels by day 90. Conclusions. CTB-specific IgG memory B cell responses are detectable in the circulation at least 3 months after V. cholerae O1 infection and remain measurable even after serum antibody titers have declined to undetectable or considerably lower levels. This suggests that antigen-specific memory B cells may be an important long-term marker of the immune response to cholera. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00221899
- Volume :
- 198
- Issue :
- 7
- Database :
- Complementary Index
- Journal :
- Journal of Infectious Diseases
- Publication Type :
- Academic Journal
- Accession number :
- 34372503
- Full Text :
- https://doi.org/10.1086/591500