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Pennington, Shaun 
ORCID: https://orcid.org/0000-0002-7160-6275, Thompson, Ameeka, Wright, Adam, Ferreira, Daniela ORCID: https://orcid.org/0000-0002-0594-0902, Jambo, Kondwani ORCID: https://orcid.org/0000-0002-3195-2210, Wright, Angela, Faragher, Brian, Gilmour, Jill W., Gordon, Stephen ORCID: https://orcid.org/0000-0001-6576-1116 and Gordon, Melita A.
(2016)
'Oral typhoid vaccination with Ty21a generates Ty21a-responsive and heterologous influenza-responsive CD4+and CD8+T-cells at the human intestinal mucosa'. Journal of Infectious Disease, Vol 213, Issue 11, pp. 1809-1819.
Abstract
Background.
Oral vaccination with live-attenuated Salmonella Typhi strain Ty21a is modestly efficacious, but the mechanisms of protection are currently unknown. While humoral and cellular immune responses are well described in peripheral blood, the cellular response at the intestinal mucosa has never been directly assessed.
Methods.
We vaccinated healthy adults with Ty21a and assessed humoral and cellular immunity in vaccinated volunteers and controls after 18 days. Immunoglobulin levels were assessed in peripheral blood by an enzyme-linked immunosorbent assay. Cellular responses were assessed in peripheral blood and at the duodenal and colonic mucosa by flow cytometry.
Results.
We demonstrate the generation of Ty21a-responsive and heterologous influenza virus–responsive CD4+ and CD8+ T cells at the duodenal mucosa. All duodenal responses were consistently correlated, and no responses were observed at the colonic mucosa. Peripheral anti-lipopolysaccharide immunoglobulin G and immunoglobulin A responses were significantly correlated with duodenal responses. The assessment of integrin β7 expression intensity among peripheral and duodenal T-cell subsets revealed varied capacities for mucosal homing and residence.
Conclusions.
The breadth of duodenal cellular responses was not reflected peripherally. The direct evaluation of mucosal immune defense may yield functional correlates of protection and could provide insight into mechanisms that may be manipulated to enhance vaccine immunogenicity.
| Item Type: | Article |
|---|---|
| Subjects: | QW Microbiology and Immunology > Bacteria > QW 138 Enterobacteriaceae QW Microbiology and Immunology > Immunotherapy and Hypersensitivity > QW 805 Vaccines. Antitoxins. Toxoids WC Communicable Diseases > Infection. Bacterial Infections > Enteric Infections > WC 270 Typhoid fever |
| Faculty: Department: | Clinical Sciences & International Health > Clinical Sciences Department |
| Digital Object Identifer (DOI): | https://doi.org/10.1093/infdis/jiw030 |
| Depositing User: | Jessica Jones |
| Date Deposited: | 17 Mar 2016 13:52 |
| Last Modified: | 07 Jun 2022 11:10 |
| URI: | https://archive.lstmed.ac.uk/id/eprint/5788 |
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