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Effects of natural raw meal (NRM) on high-fat diet and dextran sulfate sodium (DSS)-induced ulcerative colitis in C57BL/6J mice
Nutrition Research and Practice ; : 619-627, 2015.
Article in English | WPRIM | ID: wpr-58996
ABSTRACT
BACKGROUND/

OBJECTIVES:

Colitis is a serious health problem, and chronic obesity is associated with the progression of colitis. The aim of this study was to determine the effects of natural raw meal (NRM) on high-fat diet (HFD, 45%) and dextran sulfate sodium (DSS, 2% w/v)-induced colitis in C57BL/6J mice. MATERIALS/

METHODS:

Body weight, colon length, and colon weight-to-length ratio, were measured directly. Serum levels of obesity-related biomarkers, triglyceride (TG), total cholesterol (TC), low density lipoprotein (LDL), high density lipoprotein (HDL), insulin, leptin, and adiponectin were determined using commercial kits. Serum levels of pro-inflammatory cytokines including tumor necrosis factor-alpha (TNF-alpha), interleukin (IL)-1beta, and IL-6 were detected using a commercial ELISA kit. Histological study was performed using a hematoxylin and eosin (H&E) staining assay. Colonic mRNA expressions of TNF-alpha, IL-1beta, IL-6, inducible nitric oxide synthase (iNOS), and cyclooxygenase-2 (COX-2) were determined by RT-PCR assay.

RESULTS:

Body weight and obesity-related biomarkers (TG, TC, LDL, HDL, insulin, leptin, and adiponectin) were regulated and obesity was prevented in NRM treated mice. NRM significantly suppressed colon shortening and reduced colon weight-to-length ratio in HFD+DSS induced colitis in C57BL/6J mice (P < 0.05). Histological observations suggested that NRM reduced edema, mucosal damage, and the loss of crypts induced by HFD and DSS. In addition, NRM decreased the serum levels of pro-inflammatory cytokines, TNF-alpha, IL-1beta, and IL-6 and inhibited the mRNA expressions of these cytokines, and iNOS and COX-2 in colon mucosa (P < 0.05).

CONCLUSION:

The results suggest that NRM has an anti-inflammatory effect against HFD and DSS-induced colitis in mice, and that these effects are due to the amelioration of HFD and/or DSS-induced inflammatory reactions.
Subject(s)

Full text: Available Index: WPRIM (Western Pacific) Main subject: Triglycerides / Ulcer / Body Weight / RNA, Messenger / Enzyme-Linked Immunosorbent Assay / Biomarkers / Colitis, Ulcerative / Cholesterol / Cytokines / Dextran Sulfate Limits: Animals Language: English Journal: Nutrition Research and Practice Year: 2015 Type: Article

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Full text: Available Index: WPRIM (Western Pacific) Main subject: Triglycerides / Ulcer / Body Weight / RNA, Messenger / Enzyme-Linked Immunosorbent Assay / Biomarkers / Colitis, Ulcerative / Cholesterol / Cytokines / Dextran Sulfate Limits: Animals Language: English Journal: Nutrition Research and Practice Year: 2015 Type: Article