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Development and Validation of Chlamydia muridarum Mouse Models for Studying Genital Tract Infection Pathogenesis
Yihui Wang1,2, Zixuan Han3, Luying Wang4
1Department of Biomedical Engineering, Pratt School of Engineering, Duke University, Durham, NC, USA.
Abstract:
Animal infection models play significant roles in the study of bacterial pathogenic mechanisms and host-pathogen interactions, as well as in evaluating drug and vaccine efficacies. Chlamydia trachomatis is responsible for infections in various mucosal tissues, including the eyes and urogenital, respiratory, and gastrointestinal tracts. Chronic infections can result in severe consequences such as trachoma-induced blindness, ectopic pregnancy, and infertility. While intravaginal inoculation of C. muridarum mimics the natural route of sexual transmission between individuals, transcervical inoculation allows the organisms to directly infect endometrial epithelial cells without interference from host responses triggered by chlamydial contact or infection of vaginal and cervical cells. Therefore, in this study, we used mouse models to visualize pathologies in both the endometrium and oviduct following C. muridarum inoculation. Key features • This protocol develops the mouse-adapted Chlamydia muridarum model, ideal for visualizing pathologies in both the endometrium and oviduct genital tract. • Requires female mice and utilizes specific techniques for intravaginal and transcervical inoculation with chlamydial elementary body (EB) and a form specialized for intracellular replication. • The protocol necessitates specialized equipment, including a laminar flow hood, a micropipette, and a non-surgical embryo transfer device (NSET). Graphical overview.
Insights
This study presents a mouse model for Chlamydia muridarum infection, enabling visualization of genital tract pathologies. This model aids in understanding bacterial infections and developing new treatments.
Area of Science:
- Microbiology
- Immunology
- Pathogenesis
Background:
- * *Chlamydia trachomatis* causes infections in mucosal tissues, leading to severe chronic conditions like infertility.
- * Animal models are crucial for studying bacterial pathogenesis, host-pathogen interactions, and evaluating treatments.
- * Current models have limitations in mimicking natural infection routes and visualizing specific tissue responses.
Purpose of the Study:
- * To develop and present a refined mouse model for visualizing *Chlamydia muridarum* pathologies in the endometrium and oviduct.
- * To establish a protocol for studying genital tract infections and host responses.
- * To facilitate research on *Chlamydia* pathogenesis and therapeutic interventions.
Main Methods:
- * Utilized a mouse-adapted *Chlamydia muridarum* strain for inoculation.
- * Employed both intravaginal and transcervical inoculation techniques.
- * Incorporated specialized equipment for precise inoculation and visualization of pathologies.
Main Results:
- * Successfully visualized endometrial and oviduct pathologies following *C. muridarum* inoculation.
- * The developed model allows for direct observation of infection progression in key reproductive tissues.
- * Demonstrated the utility of the model for studying host-pathogen dynamics.
Conclusions:
- * The mouse-adapted *Chlamydia muridarum* model provides a valuable tool for studying genital tract infections.
- * This model enhances the understanding of chlamydial pathogenesis and associated pathologies.
- * It serves as a platform for evaluating the efficacy of novel antimicrobial strategies.
