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2016 ; 37
(2
): 97-105
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Neutrophil Accumulation in the Small Intestine Contributes to Local Tissue
Destruction Following Combined Radiation and Burn Injury
#MMPMID25501789
Carter SR
; Chen MM
; Palmer JL
; Wang L
; Ramirez L
; Plackett TP
; Gamelli RL
; Kovacs EJ
J Burn Care Res
2016[Mar]; 37
(2
): 97-105
PMID25501789
show ga
The threat of nuclear disaster makes combined radiation and burn injury (CRI) a
relevant topic when discussing modern trauma, as burn injuries are likely to
occur with detonation of a conventional nuclear weapon. Previous studies in a
murine model have shown that there is a breakdown of the gut epithelium and
subsequent bacterial translocation into mesenteric lymph nodes after CRI. This
study examines the early innate immune response of the small intestine after CRI.
Using a previously established murine model of 5 to 5.5 Gy total body irradiation
combined with 15% TBSA burn, the injury response of the small intestine was
examined at 24, 48, and 72 hours by visual assessment, myeloperoxidase, and
cytokine measurement. At 24 hours, intestinal damage as measured by villus
blunting, crypt debris, and decreased mitosis, was apparent in all injury groups
but the derangements persisted out to 72 hours only with CRI. The prolonged
intestinal damage in CRI was accompanied by a 2-fold (P < .05) elevation in
myeloperoxidase activity over sham animals at 48 hours and persisted as a 3-fold
(P < .05) elevation at 72 hours after injury. Corresponding levels of KC were
8-fold (P < .05) higher than sham at 48 hours with persistent elevation at 72
hours. An enhanced innate immune response, partially mediated by the influx of
neutrophils into the gastrointestinal tract is contributing to the
hyperinflammatory state seen after CRI. Attenuation of the local gastrointestinal
inflammatory response may play a major role in managing victims after nuclear
disaster.