Paneth cell hyperplasia and metaplasia in necrotizing enterocolitis

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Patrycja J Puiman1, Nanda Burger-Van Paassen, Maaike W Schaart

  • 1Department of Neonatology, Erasmus MC-Sophia Children's Hospital, Rotterdam 3015 GJ, The Netherlands.

Pediatric Research
|March 5, 2011
PubMed

Insights

Paneth cells in necrotizing enterocolitis (NEC) show hyperplasia and increased defensin production after recovery, suggesting a crucial role in NEC pathogenesis and defense against bacteria.

Area of Science:

  • Gastroenterology
  • Neonatal Research
  • Immunology

Background:

  • Necrotizing enterocolitis (NEC) is a severe intestinal disease in preterm infants.
  • Paneth cell dysfunction is implicated in NEC pathogenesis.
  • Understanding Paneth cell behavior is crucial for NEC management.

Purpose of the Study:

  • To investigate Paneth cell presence, protein expression, and developmental changes in NEC.
  • To analyze Paneth cell products and antimicrobial function in ileostomy outflow fluid.

Main Methods:

  • Immunohistochemistry on intestinal tissue from NEC patients and controls.
  • RT-PCR for Paneth cell protein mRNA levels.
  • Quantification of Paneth cell products and in vitro antimicrobial assays on ileostomy fluid.

Main Results:

  • Paneth cell abundance was similar in acute NEC and preterm controls.
  • Paneth cell hyperplasia and increased human alpha-defensin 5 mRNA were observed post-NEC recovery.
  • Metaplastic Paneth cells appeared in the colon of NEC patients.
  • Ileostomy fluid demonstrated antimicrobial activity against bacteria.

Conclusions:

  • Paneth cells and their products play a significant role throughout NEC.
  • Post-NEC recovery involves Paneth cell hyperplasia and enhanced antimicrobial defenses.
  • Metaplastic Paneth cells in the colon may represent an adaptive response.

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