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| Content Provider | PubMed Central |
|---|---|
| Author | Lang, Tali Hudemann, Christoph Tchatalbachev, Svetlin Stammler, Angelika Michel, Vera Aslani, Ferial Bhushan, Sudhanshu Chakraborty, Trinad Renz, Harald Meinhardt, Andreas |
| Editor | Bäumler, A. J. |
| Copyright Year | 2014 |
| Abstract | Infectious epididymitis in men, a frequent entity in urological outpatient settings, is commonly caused by bacteria originating from the anal region ascending the genitourinary tract. One of the most prevalent pathogens associated with epididymitis is Escherichia coli. In our previous study, we showed that semen quality is compromised in men following epididymitis associated with specific E. coli pathovars. Thus, our aim was to investigate possible differences in immune responses elicited during epididymitis following infection with the uropathogenic E. coli (UPEC) strain CFT073 and the nonpathogenic enteric E. coli (NPEC) strain 470. Employing an in vivo experimental epididymitis model, C57BL/6 mice were infected with UPEC CFT073, NPEC 470, or phosphate-buffered saline (PBS) as a sham control for up to 7 days. After infection with NPEC 470, the expression of proinflammatory cytokines interleukin-1 (IL-1), IL-6, and tumor necrosis factor alpha in the epididymis was significantly increased. Conversely, UPEC CFT073-challenged mice displayed inflammatory gene expression at levels comparable to sham PBS-treated animals. Moreover, by day 7 only NPEC-infected animals showed activation of adaptive immunity evident by a substantial influx of CD3+ and F4/80+ cells in the epididymal interstitium. This correlated with enhanced production of Th1-associated cytokines IL-2 and gamma interferon (IFN-γ). Furthermore, splenocytes isolated from UPEC-infected mice exhibited diminished T-cell responses with significantly reduced secretion of IL-2 and IFN-γ in contrast to NPEC-infected animals. Overall, these findings provide new insights into understanding pathogen-specific modulation of host immunity during acute phases of epididymitis, which may influence severity of disease and clinical outcomes. |
| Related Links | http://dx.doi.org/10.1128/IAI.01373-13 |
| Ending Page | 1111 |
| Page Count | 8 |
| Starting Page | 1104 |
| File Format | |
| ISSN | 10985522 |
| e-ISSN | 10985522 |
| Journal | Infection and Immunity |
| Issue Number | 3 |
| Volume Number | 82 |
| Language | English |
| Publisher | American Society for Microbiology |
| Publisher Date | 2014-03-01 |
| Access Restriction | Open |
| Rights Holder | American Society for Microbiology |
| Subject Keyword | Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Infectious Diseases Parasitology Immunology Microbiology |
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