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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 J+Pediatr+Gastroenterol+Nutr
2015 ; 60
(5
): 613-20
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Oral administration of surfactant protein-a reduces pathology in an experimental
model of necrotizing enterocolitis
#MMPMID25539191
Quintanilla HD
; Liu Y
; Fatheree NY
; Atkins CL
; Hashmi SS
; Floros J
; McCormack FX
; Rhoads JM
; Alcorn JL
J Pediatr Gastroenterol Nutr
2015[May]; 60
(5
): 613-20
PMID25539191
show ga
OBJECTIVES: Necrotizing enterocolitis (NEC) frequently results in significant
morbidity and mortality in premature infants. Others reported that mice deficient
in pulmonary surfactant protein-A (SP-A) born and raised in a nonhygienic
environment succumb to significant gastrointestinal tract pathology, and enteral
administration of purified SP-A significantly reduced mortality. We hypothesized
that oral administration of purified SP-A can ameliorate pathology in an
experimental model of neonatal NEC. METHODS: Experimental NEC was induced in
newborn Sprague-Dawley rat pups by daily formula gavage and intermittent exposure
to hypoxia. Purified human SP-A (5 ?g/day) was administered by oral gavage. After
4 days, surviving pups were sacrificed, and intestinal pathology was assessed by
histological examination of distal terminal ileal sections. Intestinal levels of
inflammatory cytokines (IL-1?, IFN-?, and TNF-?) were assessed by enzyme-linked
immunosorbent assay and levels of Toll-like receptor 4 (TLR4) by Western
analysis. RESULTS: Sixty-one percent of the gavaged rat pups that survived to day
4 met the criteria for experimental NEC after hypoxia, whereas treatment with
SP-A significantly reduced mortality and assessment of NEC. Intestinal levels of
proinflammatory cytokines were significantly increased in pups exposed to
hypoxia. Administration of SP-A to pups exposed to hypoxia significantly reduced
IL-1? and TNF-? levels, but had little effect on elevated levels of IFN-?. SP-A
treatment of hypoxia-exposed pups significantly reduced expression of intestinal
TLR4, key in NEC pathogenesis. CONCLUSIONS: In a rat model of experimental
neonatal NEC, oral administration of SP-A reduces intestinal levels of
proinflammatory cytokines and TLR4 protein and ameliorates adverse outcomes
associated with gastrointestinal pathologies.