Abstract
Chlamydia trachomatis, an obligate intracellular bacterial pathogen, is the major cause of sexually transmitted diseases worldwide. Although a variety of strategies have been taken to promote the development of a protective vaccine, no ideal vaccine has been generated so far. In this study, we transfected dendritic cells (DCs) with recombinant adenovirus carrying C. trachomatis serovar E major outer membrane protein gene (Ad-MOMP), and investigated their ability to induce specific protection against genital tract chlamydial challenge infection. The results showed that when DCs were transfected with Ad-MOMP in vitro, the DCs exhibited increased expression of CD80 and MHC-II molecules as well as enhanced IL-12 secretion and were able to stimulate T-cell proliferation. The level of IFN-gamma secreted by stimulated T cells was also up-regulated significantly. When the Ad-MOMP transfected DCs were adoptively transferred intravenously to naive mice, they generated Th1-biased cytokine production and mucosal IgA responses specific for C. trachomatis. More importantly, the mice immunized with Ad-MOMP-DC mounted protection against genital tract challenge infection, shown by lower body mass loss, lower chlamydial loads, and less severe pa...Continue Reading
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