| Heparin-binding epidermal growth factor-like growth factor downregulates expression of activator protein-1 transcription factor after intestinal ischemia-reperfusion injury. | |
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MedLine Citation:
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PMID: 21063128 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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The pathogenesis of necrotizing enterocolitis (NEC) is unknown. Ischemia and reperfusion (I/R) injury have been considered to be major contributing factors. More recent reports have noted that apoptosis is a significant and perhaps the principal contributor to cell death after I/R injury. Recent studies have revealed that activator protein 1 (AP-1) family proteins including c-Fos and c-Jun potentially induce either the proliferation or apoptosis of the cells in the brain, heart, kidney, and liver. c-Fos and c-Jun expression has also been reported to be upregulated in postischemic intestinal epithelial cells (IECs). Heparin-binding epidermal growth factor (EGF)-like growth factor (HB-EGF) is a potent cytoprotective factor in various pathologic conditions and plays a pivotal role in mediating the earliest cellular responses to injury. This study aims to examine whether HB-EGF, a proven intestinal cytoprotective molecule, exerts its protective effects through modulation of AP-1 transcription factor after intestinal I/R injury. Thirty rats were randomly divided into the following 5 groups: (1) normal control group; (2) ischemia group; (3) I/R group; (4) ischemia group with HB-EGF (400 μg/kg), and (5) I/R group with HG-EGF (400 μg/kg). c-Fos and c-Jun messenger RNAs and protein levels were determined by real-time quantitative polymerase chain reaction (PCR) and Western analyses, respectively. Statistical analysis was performed using ANOVA with Dunn's test. The messenger RNA levels of the c-Fos and c-Jun increased after intestinal ischemia or the intestinal reperfusion phase. HB-EGF pretreatment significantly decreased c-Fos and c-Jun messenger RNAs. The expression of protein levels of c-Fos and c-Jun were correlation with the expression of messenger RNA level. HB-EGF intestinal cytoprotection is mediated, in part, by downregulation of the expression of AP-1 transcription factor after intestinal I/R injury. |
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Authors:
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Chih-Cheng Luo; Yung-Ching Ming; Hsun-Chin Chao; Shih-Ming Chu; See-Tong Pang |
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Publication Detail:
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Type: Journal Article Date: 2010-11-09 |
Journal Detail:
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Title: Neonatology Volume: 99 ISSN: 1661-7819 ISO Abbreviation: Neonatology Publication Date: 2011 |
Date Detail:
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Created Date: 2011-06-24 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101286577 Medline TA: Neonatology Country: Switzerland |
Other Details:
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Languages: eng Pagination: 241-6 Citation Subset: IM |
Copyright Information:
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Copyright © 2010 S. Karger AG, Basel. |
Affiliation:
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Department of Pediatric Surgery, Department of Pediatrics, Chang Gung Children's Medical Center, Chang Gung University College of Medicine, Taoyuan, Taiwan. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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