简介：
Overview
This protocol describes the induction of colitis in mice through infection with Citrobacter rodentium, a gram-negative pathogen. It allows for the investigation of pathogen-host interactions and the assessment of various parameters related to infectious colitis.
Key Study Components
Area of Science
- Microbiology
- Immunology
- Gastroenterology
Background
- Citrobacter rodentium serves as a model for studying enteric bacterial infections.
- This model helps in understanding host immune responses.
- It is particularly relevant for research on colitis in mice.
- Assessment of barrier integrity and histological damage is crucial.
Purpose of Study
- To induce colitis in mice for research purposes.
- To study the interactions between the pathogen and the host.
- To evaluate the impact of infection on gastrointestinal health.
Methods Used
- Inoculation of mice with an overnight culture of Citrobacter rodentium.
- Oral gavage to infect mice with the pathogen.
- Collection of cecum, colon, and luminal contents on day seven post-infection.
- Immunostaining of tissues to assess host protein responses.
Main Results
- Assessment of pathogen burden and barrier function.
- Evaluation of histological damage in infected tissues.
- Analysis of changes in host immune response through immunohistochemistry.
- Characterization of both pathogen and host contributions to colitis.
Conclusions
- The model provides insights into the mechanisms of infectious colitis.
- Findings can inform future research on enteric infections.
- Understanding these interactions is vital for developing therapeutic strategies.
What is Citrobacter rodentium?
Citrobacter rodentium is a gram-negative bacterium used as a model organism to study enteric infections and colitis in mice.
How is colitis induced in this study?
Colitis is induced by infecting mice with an overnight culture of Citrobacter rodentium via oral gavage.
What are the key assessments made in this protocol?
Key assessments include pathogen load, barrier integrity, and histological damage in the gastrointestinal tract.
Why is this model important for research?
This model helps researchers understand the interactions between pathogens and host immune responses, which is critical for developing treatments for colitis.
What techniques are used to analyze tissue samples?
Tissue samples are analyzed using immunostaining and histological assessments to evaluate damage and immune responses.
What can be learned from this study?
The study provides insights into the mechanisms of infectious colitis and the roles of both pathogen and host in disease progression.
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