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In vivo Imaging Method to Distinguish Acute and Chronic Inflammation
Published on: August 16, 2013
Bioluminescence imaging for IL-1β expression in experimental colitis
Limei Li1,2,3, Zhenzhe Liu4, Xinyu Yang4
1Shanghai Research Centre for Model Organisms, Shanghai 201203, PR China.
Journal of Inflammation (London, England)
|April 13, 2013
Summary
This study uses bioluminescence to track Interleukin 1 beta (IL-1β) production in real-time during experimental colitis. Findings reveal IL-1β activity in the colon and lymph nodes, offering insights into inflammatory bowel disease (IBD) mechanisms.
Area of Science:
- Biotechnology
- Molecular Biology
- Immunology
Background:
- Interleukin 1 beta (IL-1β) is implicated in inflammatory bowel disease (IBD) pathogenesis.
- The cellular origin of IL-1β in dextran sodium sulfate (DSS)-induced colitis remains unclear.
Purpose of the Study:
- To visualize and quantify IL-1β gene transcription in real-time during experimental colitis.
- To identify the primary sites of IL-1β production in the inflamed intestine.
Main Methods:
- Generation of a cHS4I-hIL-1βP-Luc transgenic mouse model for bioluminescent IL-1β tracking.
- Induction of colitis using dextran sodium sulfate (DSS) and confirmation via clinical and histopathological assessments.
- Monitoring luciferase activity as a surrogate for IL-1β production in vivo.
Main Results:
- Significant, time-dependent increase in luciferase activity observed in the inflamed colon.
- Bioluminescence signal detected in mesenteric lymph nodes, indicating IL-1β activity spread.
- Dexamethasone treatment suppressed luciferase activity, correlating with reduced colitis severity, validating the reporter system.
Conclusions:
- Bioluminescence imaging provides a powerful tool for real-time assessment of IL-1β gene transcription in experimental colitis models.
- This technology can help elucidate the role of IL-1β in IBD and evaluate therapeutic interventions.
