Yuan MM, Xiong JJ, Zhao C, Hu HW, Liu M, Zhao YL, Ding ZB, Huang YK. Effect of montmorillonite powder and mesalazine on intestinal epithelial cell apoptosis in rats with ulcerative colitis.
Shijie Huaren Xiaohua Zazhi 2014;
22:3911-3917. [DOI:
10.11569/wcjd.v22.i26.3911]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To assess the effect of montmorillonite powder (Smecta) and mesalazine, alone or in combination, on intestinal epithelial cell apoptosis in rats with 2,4,6-trinitrobenzene sulfonic acid (TNBS) induced colitis.
METHODS: Eighty-two male SD rats were randomly divided into a normal group, a model group and three intervention groups including Smecta group, mesalazine group, and mesalazine plus Smecta group. Ulcerative colitis (UC) was induced in rats by the TNBS/ethanol method. The model group was daily treated with normal saline, and the intervention groups were intragastrically treated with Smecta, mesalazine, mesalazine plus Smecta, respectively. Rats were killed on days 5 and 12 after treatment to collect colon specimens. Terminal-deoxynucleoitidyl transferase mediated nick end labeling (TUNEL) method was used to assay intestinal cell apoptosis rate.
RESULTS: The rats treated with TNBS/ethanol had diarrhea with bloody stools and weight loss 24 h after model creation. Light and electronic microscopic analyses showed large mucosal ulceration area accompanied by neutrophil infiltration, damaged gland structural and decreased goblet cells. Compared with the normal group, intestinal epithelial cell apoptosis rates in the model group and three intervention groups were significantly increased on days 5 and 12 (H5 = 439.78, H12 = 84.03, P = 0.000). Compared with the model group, intestinal epithelial cell apoptosis rates in the three intervention groups were significantly lower on days 5 and 12 (P = 0.000). The apoptosis rates in the combination group were more significantly lower than those in the two monotherapy groups (P = 0.000). The apoptosis rates in the three intervention groups on day 12 were more significantly lower than those on day 5 (P = 0.000).
CONCLUSION: Intestinal epithelial cell apoptosis is involved in the pathogenesis of UC. Montmorillonite powder combined with mesalazine therapy has a synergistic inhibitory effect on apoptosis. The inhibitory effect on apoptosis is better on day 12 than on day 5.
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