Ju H, Liu XS, Wei LZ, Liu H, Yin JP. Effect of infection on cytokine expression in the colon mucosa of patients with irritable bowel syndrome.
Shijie Huaren Xiaohua Zazhi 2012;
20:1574-1578. [DOI:
10.11569/wcjd.v20.i17.1574]
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Abstract
AIM: To explore the impact of infection on the immune-nervous-endocrine network in patients with irritable bowel syndrome (IBS).
METHODS: Forty-five patients with postinfectious IBS (PI-IBS), 60 patients with non-postinfectious IBS (non-PI-PBS), and 30 healthy controls were included. Immunohistochemical staining was performed to analyze the expression of substance P (SP), interleukin (IL)-2, 5-hydroxytryptamine (5-HT), interferon (IFN)-γ, substance P receptor (SPR) in the colon mucosa of these subjects. Mast cells (MCs) were stained with toluidine blue.
RESULTS: The expression of SP, MCs, 5-HT, SP-R, IFN-γ, and IL-2 in PI-IBS patients was higher than that in non-PI-IBS patients and controls (t = 2.5, 2.8, both P < 0.01; t = 11.5, 12.1, both P < 0.01; t = 13.6, 14.1, both P < 0.01; t = 3.8, 6.1, both P < 0.05; t = 13.8, 15.2, both P < 0.05; t = 12.6, 14.7, both P < 0.05). The expression of ileocecal mucosal MCs was positively correlated with that of SP in PI-IBS patients (r = 0.71, P < 0.01). The expression of ileocecal mucosal 5-HT was closely associated with that of SPR in PI-IBS patients (r = 0.18, P < 0.05). SP expression in PI-IBS patients who were positive for IFN-γ or IL-2 was higher than that in non-PI-IBS patients (t = 2.22, 2.3, P < 0.05) and controls (t = 2.3, 2.4, P < 0.05).
CONCLUSION: Nerve fibers are critical for the immune-nervous-endocrine network in IBS patients after intestinal infection.
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