Document Detail


Proliferative response in necrotising enterocolitis is insufficient to prevent disease progression.
MedLine Citation:
PMID:  16283334     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Necrotising enterocolitis (NEC) is characterised by severe mucosal loss and therefore gastrointestinal (GI) cell proliferation is essential for survival, epithelial repair and recovery of function. Trefoil peptides play a key role in epithelial restitution and repair, and we previously reported a down-regulation of these peptides in NEC. Oral administration of epidermal growth factor has a protective effect in a rat model of colitis. These observations raised the question of a link between the pathogenesis of NEC and decreased mucosal cell proliferation. This study investigates the pattern of mucosal cell proliferation in the GI tract of fetuses, normal neonatal controls, infants with NEC and those recovering from NEC. Parents of neonates up to 44 weeks' gestation undergoing laparotomy and bowel resection were approached for consent. Bowel samples from resection specimens, and GI tract extractions from products of conception at termination of pregnancy, were fixed in formalin and then embedded in paraffin blocks. Patterns of small and large bowel mucosal proliferation were assessed by immunohistochemical staining for Ki67. Seventeen foetal and 58 postnatal bowel samples [34 with NEC (22 acute, 12 recovery) and 24 controls] were analysed. The pattern of proliferation seen in the fetus and normal neonate was identical to that in mature bowel. In NEC severe mucosal necrosis was observed, but in viable crypts remaining, there was crypt hyperplasia and a relative increase in the proportion of cells staining positive for Ki67. In those patients recovering from NEC the pattern of proliferation was returning towards the normal range. In those patients with post-NEC strictures the recovery of normal bowel morphology was delayed. In NEC there is massive loss of potential proliferative tissue. The remaining viable tissue shows an increase in proliferative activity in the small and large bowel. Failure of rapid regeneration of functional mucosa may therefore be related to an inability of increased proliferative activity to match the losses from the surface; alternatively there may be rapid production of immature, short-lived cells. This study shows that the proliferative response, although present, is insufficient to rapidly reverse the mucosal insult observed in NEC.
Authors:
Daniela Vieten; Anthony Corfield; Pramila Ramani; Richard Spicer
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Pediatric surgery international     Volume:  22     ISSN:  0179-0358     ISO Abbreviation:  Pediatr. Surg. Int.     Publication Date:  2006 Jan 
Date Detail:
Created Date:  2006-01-09     Completed Date:  2006-05-25     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8609169     Medline TA:  Pediatr Surg Int     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  50-6     Citation Subset:  IM    
Affiliation:
Department of Paediatric Surgery, Directorate of Children's Services, Bristol Royal Hospital for Children, Paul O'Gorman Building, Upper Maudlin Street, Bristol BS2 8BJ, UK. danielav@doctors.org.uk
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MeSH Terms
Descriptor/Qualifier:
Analysis of Variance
Case-Control Studies
Cell Proliferation*
Disease Progression
Enterocolitis, Necrotizing / pathology*
Epithelial Cells / metabolism*
Fetal Diseases / pathology
Humans
Immunohistochemistry
Infant, Newborn
Intestinal Mucosa / pathology*
Ki-67 Antigen / metabolism
Chemical
Reg. No./Substance:
0/Ki-67 Antigen

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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