The relationship between the concentration of dextran sodium sulfate and the degree of induced experimental colitis in weanling rats.

Abstract:

BACKGROUND:Although a dextran sodium sulfate (DSS)-induced colitis is commonly used as an ulcerative colitis (UC) model in adult rodents, there are no studies using this model in young animals. We examined differences in the severity of DSS-induced colitis as a function of the concentration of DSS administered and sought to establish a DSS-induced colitis model in young rats. METHODS:We administrated different concentrations of DSS solution (2%, 3%, and 4%) to 4-week-old weanling rats and compared their clinical findings, colonic histologic findings, mucosal leukotriene B4 (LTB4) production, and mucosal blood flow with control weanling rats and 8-week-old adult rats given 4% DSS for induced colitis. RESULTS:Clinical symptoms, such as diarrhea and rectal bleeding, histologic findings, and disturbance of mucosal microcirculation in weanling rats given 4% DSS were significantly more severe than those in adult rats given the same treatment. Three of 10 rats given 2% DSS had no bloody stool and 2 of 10 rats given 4% DSS died during the experimental periods. Clinical symptoms, hemoglobin levels, histologic damage scores, mucosal LTB4 production, and mucosal blood flow became more severely deranged as the concentration of DSS increased from 2% to 4%. CONCLUSION:These findings suggest that we can adjust disease severity in UC model for young children by giving different concentrations of DSS to weanling rats.

authors

Shimizu T,Suzuki M,Fujimura J,Hisada K,Yoshikazu O,Obinata K,Yamashiro Y

doi

10.1097/00005176-200310000-00015

subject

Has Abstract

pub_date

2003-10-01 00:00:00

pages

481-6

issue

4

eissn

0277-2116

issn

1536-4801

journal_volume

37

pub_type

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