Bifidobacterium bifidum in a rat model of necrotizing enterocolitis: Antimicrobial peptide and protein responses

Mark Underwood, Anchasa Kananurak, Christine F. Coursodon, Camille K. Adkins-Reick, Hiutung Chu, Stephen H. Bennett, Jan Wehkamp, Patricia A. Castillo, Brian C Leonard, Daniel J Tancredi, Michael P. Sherman, Bohuslav Dvorak, Charles L Bevins

Research output: Contribution to journalArticlepeer-review

36 Scopus citations


Introduction: Necrotizing enterocolitis (NEC) is a devastating disease of premature infants. Probiotics decrease the risk of NEC in clinical and experimental studies. Antimicrobial peptides protect the gut against noxious microbes and shape the commensal microbiota, but their role in NEC remains unclear.Methods:To investigate the expression of antimicrobial peptides in experimental NEC and the impact of probiotics on their expression, premature rats were divided into three groups: dam fed (DF), hand fed with formula (FF), or hand fed with formula containing Bifidobacterium bifidum (FF + BIF). All groups were exposed to asphyxia and cold stress. Results: Like in human ontogeny, the rat pup has low expression of Paneth cell antimicrobials, which increases rapidly during normal development. The expression of lysozyme, secretory phospholipase A 2 (sPLA 2), pancreatic-associated proteins 1 and 3 mRNA was elevated in the FF group with a high incidence of NEC, as compared with the DF and FF + BIF groups where the disease was attenuated. Discussion: We conclude that induction of antimicrobial peptides occurs in experimental NEC similar to that reported in human disease and is attenuated when disease is averted by probiotic B. bifidum. The induction of antimicrobial peptides is likely an adaptive mucosal response that is often not sufficient to prevent disease in the premature gut.

Original languageEnglish (US)
Pages (from-to)546-551
Number of pages6
JournalPediatric Research
Issue number5
StatePublished - May 2012

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health


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