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Heparin-binding EGF-like Growth Factor Promotes Neuronal Nitric Oxide Synthase Expression and Protects the Enteric Nervous System After Necrotizing Enterocolitis

Overview
Journal Pediatr Res
Specialties Biology
Pediatrics
Date 2017 Apr 20
PMID 28422949
Citations 15
Authors
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Abstract

BackgroundNeonatal necrotizing enterocolitis (NEC) is associated with alterations of the enteric nervous system (ENS), with loss of neuronal nitric oxide synthase (nNOS)-expressing neurons in the intestine. The aim of this study was to investigate the roles of heparin-binding EGF-like growth factor (HB-EGF) in neural stem cell (NSC) differentiation, nNOS expression, and effects on ENS integrity during experimental NEC.MethodsThe effects of HB-EGF on NSC differentiation and nNOS production were determined using cultured enteric NSCs. Myenteric neuronal subpopulations were examined in HB-EGF knockout mice. Rat pups were exposed to experimental NEC, and the effects of HB-EGF treatment on nNOS production and intestinal neuronal apoptosis were determined.ResultsHB-EGF promotes NSC differentiation, with increased nNOS production in differentiated neurons and glial cells. Moreover, loss of nNOS-expressing neurons in the myenteric plexus and impaired neurite outgrowth were associated with absence of the HB-EGF gene. In addition, administration of HB-EGF preserves nNOS expression in the myenteric plexus and reduces enteric neuronal apoptosis during experimental NEC.ConclusionHB-EGF promotes the differentiation of enteric NSCs into neurons in a nitric oxide (NO)-dependent manner, and protects the ENS from NEC-induced injury, providing new insights into potential therapeutic strategies for the treatment of NEC in the future.

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