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- W2034003661 abstract "Mucosally administered antigens are often poorly immunogenic due to the difficulty of transporting antigens through the mucosal epithelium. We investigated a new route of intranasal-associated lymphoid tissue (intra-NALT) administration of antigens to circumvent the antigen transportation barrier. A comparative study was carried out on mice administered with killed whole cells of Moraxella catarrhalis strain 25238 plus cholera toxin (CT) by intra-NALT injection and nasal inoculation. Both routes induced significant elevations of several isotype antibodies against strain 25238 in saliva, lung lavage, and serum as measured by an enzyme-linked immunosorbent assay (ELISA). Most of these antibodies were paralleled by the numbers of their corresponding antibody forming cells in mucosal or systemic lymphoid tissues. However, intra-NALT injection elicited higher levels of immunoglobulin (Ig) A and IgG in saliva, IgA and IgG in lung lavage, and IgG and IgM in sera than nasal inoculation (P<or=0.05). In addition, both routes generated significant reductions of bacteria in lungs following an aerosol challenge with strain 25238 in a mouse model of pulmonary clearance. Once again, intra-NALT route showed better bacterial clearance in mouse lungs than nasal inoculation (P<0.01). These results demonstrate that intra-NALT administration of antigens is a convenient and effective route for mucosal immunization that elicits improved mucosal and systemic immunity. This new route can be used as a model to study mucosal antigens or vaccine candidates for antigen activation and interaction with the NALT that is one of major inductive sites for common mucosal immune system." @default.
- W2034003661 created "2016-06-24" @default.
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- W2034003661 date "2002-05-01" @default.
- W2034003661 modified "2023-10-14" @default.
- W2034003661 title "A new intra-NALT route elicits mucosal and systemic immunity against Moraxella catarrhalis in a mouse challenge model" @default.
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- W2034003661 doi "https://doi.org/10.1016/s0264-410x(02)00097-x" @default.
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