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Updated: Jul 30, 2025

Analyzing Beneficial Effects of Nutritional Supplements on Intestinal Epithelial Barrier Functions During Experimental Colitis
Published on: January 5, 2017
EPOR activation attenuates colitis via enhancing LC3B-dependent apoptotic cell clearance
Xue Liu1,2, Ling-Yuan Zhang1, Yu-Ge Zhang1
1School of Basic Medical Sciences, Nanjing Medical University, Nanjing, China.
Erythropoietin receptor (EPOR) activation in macrophages alleviates colitis by enhancing apoptotic cell clearance, likely through LC3B-associated phagocytosis (LAP). This discovery offers a new therapeutic target for inflammatory bowel disease (IBD).
Area of Science:
- Immunology
- Gastroenterology
- Cell Biology
Background:
- Inflammatory bowel disease (IBD) is characterized by systemic immune activation and inflammation due to intestinal barrier damage.
- Accumulation of apoptotic cells exacerbates IBD by increasing inflammatory factors.
- Gene set enrichment analysis revealed high expression of homodimeric erythropoietin receptor (EPOR) in IBD patients' blood, with specific expression in intestinal macrophages, but its role remained unclear.
Purpose of the Study:
- To investigate the role of EPOR in the development of IBD.
- To explore the therapeutic potential of EPOR activation in colitis models.
Main Methods:
- Investigated the effect of EPOR activation on colitis in a mouse model.
- Utilized in vitro studies with bone marrow-derived macrophages (BMDMs) to examine EPOR's cellular mechanisms.
- Assessed the activation of microtubule-associated protein 1 light chain 3B (LC3B) and apoptotic cell clearance.
Main Results:
- EPOR activation significantly alleviated colitis in mice.
- In vitro, EPOR activation in BMDMs promoted LC3B activation and enhanced the clearance of apoptotic cells.
- EPOR activation facilitated the expression of factors involved in phagocytosis and tissue repair.
Conclusions:
- EPOR activation in macrophages promotes apoptotic cell clearance, potentially via LC3B-associated phagocytosis (LAP).
- This mechanism provides new insights into IBD pathology.
- EPOR activation represents a novel potential therapeutic target for colitis.
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