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Three-dimensional Quantification of Intestinal Mucus Using Whole-mount Tissue Imaging
Published on: September 12, 2025
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DOCK4 stimulates MUC2 production through its effect on goblet cell differentiation
Tingfeng Qin1, Jie Yang1, Dayin Huang1
1Department of Physiology, School of Medicine, Jinan University, Tianhe, Guangzhou, Guangdong, China.
Journal of Cellular Physiology
|February 9, 2021
Summary
Dedicator of cytokinesis 4 (DOCK4) is crucial for intestinal health, promoting goblet cell differentiation and Mucin 2 (MUC2) production. Its absence impairs the intestinal barrier, highlighting DOCK4
Area of Science:
- Gastroenterology
- Cell Biology
- Molecular Biology
Background:
- The intestinal epithelial barrier is vital for preventing infection and inflammation.
- Mucin 2 (MUC2) forms the mucus layer, protecting the gut.
- Dedicator of cytokinesis 4 (DOCK4) aids intestinal barrier repair.
Purpose of the Study:
- To investigate the role of DOCK4 in goblet cell differentiation.
- To examine DOCK4's influence on MUC2 production.
Main Methods:
- Studied DOCK4 gene knockout mice to observe intestinal changes.
- Utilized HT-29 cells for overexpression and siRNA knockdown experiments.
- Analyzed MUC2, DOCK4, and related factor mRNA levels in human colorectal cancer samples.
Main Results:
- DOCK4 knockout mice showed disordered epithelium and fewer goblet cells.
- DOCK4 deletion reduced MUC2 and goblet cell differentiation factors (Gfi1, Spdef).
- DOCK4 manipulation in HT-29 cells directly affected Gfi1, Spdef, and MUC2 levels.
- Colorectal cancer samples exhibited decreased MUC2, DOCK4, and differentiation factors.
- A positive correlation was observed between MUC2 and DOCK4 expression.
Conclusions:
- DOCK4 is essential for proper goblet cell differentiation.
- DOCK4 regulates MUC2 production in the intestine.
- DOCK4 may be a key factor in maintaining intestinal barrier integrity and could be relevant in colorectal cancer.
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