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Updated: May 5, 2026
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Investigating Intestinal Inflammation in DSS-induced Model of IBD
Published on: February 1, 2012
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IL-10 modulates DSS-induced colitis through a macrophage-ROS-NO axis
1Department of Pathology, St Jude Children's Research Hospital, Memphis, Tennessee, USA.
Mucosal Immunology
|December 5, 2013
Summary
Interleukin-10 (IL-10) protects against colitis primarily by acting on macrophages. This involves downregulating nitric oxide (NO) and reactive oxygen species (ROS) production, crucial for its protective effects.
Area of Science:
- Immunology
- Gastroenterology
- Cell Biology
Background:
- Epithelial barrier breakdown causes colitis.
- Interleukin-10 (IL-10) regulates colitis, but its targets and mechanisms are unclear.
Purpose of the Study:
- To determine the cellular targets and mechanisms of IL-10's protective effects in colitis.
Main Methods:
- Mice with macrophage-selective deletion of IL-10 receptor alpha (IL-10Rα(Mdel)) were used.
- Dextran sodium sulfate (DSS)-induced colitis was analyzed.
- Macrophage nitric oxide (NO) and reactive oxygen species (ROS) production was measured.
Main Results:
- IL-10Rα(Mdel) mice showed enhanced DSS-induced colitis, similar to IL-10(-/-) mice.
- Macrophage-specific IL-10Rα deletion increased NO and ROS production.
- Inhibiting NO and ROS dramatically reduced colitis severity in IL-10Rα(Mdel) mice.
Conclusions:
- IL-10's protective effects in DSS-induced colitis are predominantly mediated by macrophage-specific actions.
- Downregulation of NO and ROS production by macrophages is central to IL-10's protective function.
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