Heparin-binding epidermal growth factor-like growth factor restores Wnt/β-catenin signaling in intestinal stem cells exposed to ischemia/reperfusion injury.

Heparin-binding epidermal growth factor-like growth factor restores Wnt/β-catenin signaling in intestinal stem cells exposed to ischemia/reperfusion injury.
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DOI:
10.1016/j.surg.2014.01.013
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发表时间:
2014-06
期刊:
影响因子:
3.8
通讯作者:
Besner, Gail E.
Besner, Gail E.
中科院分区:
医学2区
文献类型:
--
作者:
Chen, Chun-Liang;Yang, Jixin;James, Iyore O. A.;Zhang, Hong-yi;Besner, Gail E.

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We have previously demonstrated that heparin-binding EGF-like growth factor (HB-EGF) protects the intestines from injury in several different experimental animal models. In the current study, we investigated whether the ability of HB-EGF to protect the intestines from ischemia/reperfusion (I/R) injury was related to its effects on Wnt/β-catenin signaling in intestinal stem cells (ISC). LGR5-EGFP transgenic (TG) mice with fluorescently labeled ISC, as well as the same mice treated with intraluminal HB-EGF or genetically engineered to overexpress HB-EGF, were exposed to segmental mesenteric artery occlusion (sMAO) to the terminal ilium. Wnt/β-catenin signaling was evaluated using immunofluorescent staining and Western blotting. LGR5 expression and Wnt/β-catenin signaling in the ISC of the terminal ilium of LGR5-EGFP TG mice was significantly reduced 24 h post sMAO. Intraluminal administration of HB-EGF or HB-EGF overexpression in these mice led to preservation of LGR5 expression and Wnt/β-catenin signaling. These data show that HB-EGF preserves Wnt/β-catenin signaling in ISC after I/R injury.
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