Chlamydia-infected macrophages are resistant to azithromycin treatment and are associated with chronic oviduct inflammation and hydrosalpinx development
Marina C. G. Harvie, Alison J. Carey, Charles W. Armitage, Connor P. O'Meara, Jesse Peet, Zachary N. Phillips, Peter Timms and Kenneth W. Beagley
Cell Biology Immunology Life Sciences & Biomedicine Science & Technology
Chlamydia infection remains the leading sexually-transmitted bacterial infection worldwide, causing damaging sequelae such as tubal scarring, infertility and ectopic pregnancy. As infection is often asymptomatic, prevention via vaccination is the optimal strategy for disease control. Vaccination strategies aimed at preventing bacterial infection have shown some promise, although these strategies often fail to prevent damaging inflammatory pathology when Chlamydia is encountered. Using a murine model of Chlamydia muridarum genital infection, we employed two established independent models to compare immune responses underpinning pathologic development of genital Chlamydia infection. Model one uses antibiotic treatment during infection, with only early treatment preventing pathology. Model two uses a plasmid-cured variant strain of C. muridarum that does not cause pathologic outcomes like the plasmid-containing wild-type counterpart. Using these infection models, contrasted by the development of pathology, we identified an unexpected role for macrophages. We observed that mice showing signs of pathology had greater numbers of activated macrophages present in the oviducts. This may have been due to early differences in macrophage activation and proinflammatory signaling leading to persistent or enhanced infection. These results provide valuable insight into the cellular mechanisms driving pathology in Chlamydia infection and contribute to the design and development of more effective vaccine strategies for protection against the deleterious sequelae of Chlamydia infection of the female reproductive tract.
Chlamydia-infected macrophages are resistant to azithromycin treatment and are associated with chronic oviduct inflammation and hydrosalpinx development
Creators
Marina C. G. Harvie - Queensland University of Technology
Alison J. Carey - Queensland University of Technology
Charles W. Armitage - Queensland University of Technology
Connor P. O'Meara - Queensland University of Technology
Jesse Peet - Queensland University of Technology
Zachary N. Phillips - Queensland University of Technology
Peter Timms - University of the Sunshine Coast
Kenneth W. Beagley - Queensland University of Technology
Publication Details
Immunology and cell biology, v 97(10), pp 865-876
Publisher
Wiley
Number of pages
12
Grant note
Queensland Government National and International Research Alliances Program (NIRAP) award
APP1052464 / NHMRC Peter Doherty Early Career Fellowship; National Health and Medical Research Council (NHMRC) of Australia
Resource Type
Journal article
Language
English
Academic Unit
Pediatrics; College of Medicine; Drexel University
Web of Science ID
WOS:000485351400001
Scopus ID
2-s2.0-85072186413
Other Identifier
991020099262204721
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