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Open Access Systemic and Mucosal Antibody Response in Experimental Chlamydia pneumoniae Infection of Mice

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Chlamydia pneumoniae is a common human respiratory pathogen, and sera from infected individuals recognize several proteins of C. pneumoniae. We produced C. pneumoniae-specific proteins in a Bacillus subtilis expression system. We then used these recombinant C. pneumoniae proteins and purified C. pneumoniae elementary bodies as antigens in enzyme immunoassays to assess the kinetics and protein specificity of the systemic and mucosal antibody responses induced by C. pneumoniae intranasal infection in BALB/c mice. The systemic antibodies in mice recognized strong 'key' immunogens of Chlamydia, Omp2 and Hsp60, but weakly targeted the MOMP protein, the major immunogen in chlamydial species other than C. pneumoniae. The IgA antibodies in bronchial secretions specifically recognized the putative surface protein of C. pneumoniae, Omp4. Our preliminary observations point to the necessity of further characterization of the mucosal antibody response during C. pneumoniae infection.

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Document Type: Research Article

Publication date: August 1, 2006

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  • Comparative Medicine (CM), an international journal of comparative and experimental medicine, is the leading English-language publication in the field and is ranked by the Science Citation Index in the upper third of all scientific journals. The mission of CM is to disseminate high-quality, peer-reviewed information that expands biomedical knowledge and promotes human and animal health through the study of laboratory animal disease, animal models of disease, and basic biologic mechanisms related to disease in people and animals.

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