Related Experiment Video
Updated: May 10, 2026
Functional Assessment of Intestinal Motility and Gut Wall Inflammation in Rodents: Analyses in a Standardized Model of Intestinal Manipulation
Published on: September 11, 2012
Inhibition of MK2 shows promise for preventing postoperative ileus in mice
Xiaodong Liu1, Ting Wu, Pan Chi
1Department of Colon and Rectal Surgery, Union Clinical Medical College, Fujjian Medical University, Fuzhou, China.
Background:
Postoperative ileus (POI) is a common iatrogenic complication caused by physical disturbances to the bowel during abdominal surgery. Inflammation contributes to the development of POI and leads to impaired intestinal motility. Mitogen-activated protein kinase-activated protein kinase 2 (MK2) plays an essential role in inflammation and is an established drug target for many inflammatory diseases. We evaluated the role of MK2 in POI and investigated whether MK2 inhibition will alleviate POI.
Materials And Methods:
One group of mice were sham operated as controls. In another two groups, POI was induced by intestinal manipulation, and in one of the groups, MK2 inhibitor was administered 1 h before intestinal manipulation. The bowel tissues were collected and analyzed using real-time reverse-transcriptase polymerase chain reaction, immunoblot, whole-mount histochemistry, immunofluorescence in muscularis, and functional analyses.
Results:
Bowel manipulation resulted in an upregulation of MK2 activation. Preoperative treatment with an MK2 inhibitor reduced the proinflammatory gene expression induced by intestinal manipulation, such as macrophage inflammatory protein-1α, tumor necrosis factor-α, interleukin-6, interleukin-1β, intercellular adhesion molecule-1, and monocyte chemotactic protein-1. MK2 inhibitor administration significantly reduced the number of myeloperoxidase-positive polymorphonuclear neutrophils, mast cells, and monocyte-derived macrophages that infiltrated the muscularis and prevented the surgically induced reduction in bowel smooth muscle contractility and gastrointestinal transit ability.
Conclusions:
MK2 mediated the cellular inflammatory responses within the intestinal muscularis in a mouse model of POI. Inhibition of MK2 activity reduced recruitment of immune cells to the intestinal muscularis, preventing loss of intestine smooth muscle contractility. These findings suggest MK2 inhibition is a promising potential target for preventing POI.
Insights
Mitogen-activated protein kinase-activated protein kinase 2 (MK2) inhibition effectively reduced inflammation and restored intestinal motility in a mouse model of postoperative ileus (POI). This suggests MK2 is a promising therapeutic target for preventing POI.
Area of Science:
- Gastroenterology
- Surgical Complications
- Inflammation Research
Background:
- Postoperative ileus (POI) is a common complication following abdominal surgery, characterized by impaired intestinal motility due to inflammation.
- Mitogen-activated protein kinase-activated protein kinase 2 (MK2) is a key mediator of inflammation and a potential therapeutic target.
Purpose of the Study:
- To investigate the role of MK2 in the development of POI.
- To determine if inhibiting MK2 can alleviate POI in a mouse model.
Main Methods:
- POI was induced in mice via intestinal manipulation.
- Mice received an MK2 inhibitor prior to manipulation.
- Bowel tissues were analyzed using molecular and functional assays.
Main Results:
- Intestinal manipulation upregulated MK2 activation and proinflammatory gene expression.
- MK2 inhibition reduced immune cell infiltration into the muscularis.
- MK2 inhibition preserved bowel smooth muscle contractility and gastrointestinal transit.
Conclusions:
- MK2 mediates inflammatory responses in the intestinal muscularis during POI.
- Inhibiting MK2 reduces immune cell recruitment and prevents loss of intestinal contractility.
- MK2 inhibition represents a potential therapeutic strategy for preventing POI.
