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Updated: Nov 12, 2025
Depletion and Reconstitution of Macrophages in Mice
Published on: August 1, 2012
Roles of Macrophages in the Development and Treatment of Gut Inflammation
Xuebing Han1, Sujuan Ding1, Hongmei Jiang1
1College of Bioscience and Biotechnology, Hunan Agricultural University, Hunan Provincial Engineering Research Center of Applied Microbial Resources Development for Livestock and Poultry, Changsha, China.
Abstract:
Macrophages, which are functional plasticity cells, have the ability to phagocytize and digest foreign substances and acquire pro-(M1-like) or anti-inflammatory (M2-like) phenotypes according to their microenvironment. The large number of macrophages in the intestinal tract, play a significant role in maintaining the homeostasis of microorganisms on the surface of the intestinal mucosa and in the continuous renewal of intestinal epithelial cells. They are not only responsible for innate immunity, but also participate in the development of intestinal inflammation. A clear understanding of the function of macrophages, as well as their role in pathogens and inflammatory response, will delineate the next steps in the treatment of intestinal inflammatory diseases. In this review, we discuss the origin and development of macrophages and their role in the intestinal inflammatory response or infection. In addition, the effects of macrophages in the occurrence and development of inflammatory bowel disease (IBD), and their role in inducing fibrosis, activating T cells, reducing colitis, and treating intestinal inflammation were also reviewed in this paper.
Insights
Macrophages are key immune cells in the gut, influencing inflammation and tissue repair. Understanding their roles is crucial for developing new treatments for intestinal inflammatory diseases like inflammatory bowel disease (IBD).
Area of Science:
- Immunology
- Gastroenterology
- Cell Biology
Background:
- Macrophages are highly plastic immune cells with phagocytic capabilities.
- Intestinal macrophages are vital for mucosal homeostasis, epithelial renewal, and immune responses.
- These cells can adopt pro-inflammatory (M1-like) or anti-inflammatory (M2-like) phenotypes based on their microenvironment.
Purpose of the Study:
- To review the origin, development, and function of macrophages in the intestinal tract.
- To elucidate the role of macrophages in intestinal inflammatory responses and infections.
- To explore the involvement of macrophages in inflammatory bowel disease (IBD) pathogenesis and therapeutic strategies.
Main Methods:
- Literature review focusing on macrophage biology and function in the gut.
- Analysis of studies investigating macrophage roles in intestinal inflammation, infection, and IBD.
- Synthesis of information on macrophage-mediated fibrosis, T cell activation, and colitis reduction.
Main Results:
- Macrophages play a dual role in intestinal immunity, contributing to both defense and inflammation.
- Dysregulated macrophage activity is implicated in the development and progression of inflammatory bowel disease (IBD).
- Macrophages influence key processes such as fibrosis, T cell modulation, and resolution of colitis.
Conclusions:
- A comprehensive understanding of intestinal macrophage biology is essential for advancing IBD treatment.
- Targeting macrophage functions offers potential therapeutic avenues for inflammatory bowel diseases.
- Further research into macrophage plasticity and function can lead to novel strategies for managing intestinal inflammation.
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