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ANGPTL 2 expression in the intestinal stem cell niche controls epithelial regeneration and homeostasis
Author(s) -
Horiguchi Haruki,
Endo Motoyoshi,
Kawane Kohki,
Kadomatsu Tsuyoshi,
Terada Kazutoyo,
Morinaga Jun,
Araki Kimi,
Miyata Keishi,
Oike Yuichi
Publication year - 2017
Publication title -
the embo journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 7.484
H-Index - 392
eISSN - 1460-2075
pISSN - 0261-4189
DOI - 10.15252/embj.201695690
Subject(s) - biology , microbiology and biotechnology , stem cell , lgr5 , intestinal epithelium , wnt signaling pathway , immunology , homeostasis , intestinal mucosa , epithelium , signal transduction , medicine , genetics
The intestinal epithelium continually self‐renews and can rapidly regenerate after damage. Dysregulation of intestinal epithelial homeostasis leads to severe inflammatory bowel disease. Additionally, aberrant signaling by the secreted protein angiopoietin‐like protein 2 ( ANGPTL 2) causes chronic inflammation in a variety of diseases. However, little is known about the physiologic role of ANGPTL 2 in normal tissue homeostasis and during wound repair following injury. Here, we assessed ANGPTL 2 function in intestinal physiology and disease in vivo . Although intestinal development proceeded normally in Angptl2 ‐deficient mice, expression levels of the intestinal stem cell ( ISC ) marker gene Lgr5 decreased, which was associated with decreased transcriptional activity of β‐catenin in Angptl2 ‐deficient mice. Epithelial regeneration after injury was significantly impaired in Angptl2 ‐deficient relative to wild‐type mice. ANGPTL 2 was expressed and functioned within the mesenchymal compartment cells known as intestinal subepithelial myofibroblasts ( ISEMF s). ANGPTL 2 derived from ISEMF s maintained the intestinal stem cell niche by modulating levels of competing signaling between bone morphogenetic protein ( BMP ) and β‐catenin. These results support the importance of ANGPTL 2 in the stem cell niche in regulating stemness and epithelial wound healing in the intestine.