alexa Probiotics modulate inflammatory cytokine secretion from inflamed mucosa in active ulcerative colitis.


Journal of Microbial & Biochemical Technology

Author(s): Bai AP, Ouyang Q, Xiao XR, Li SF

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Abstract Enteric microflora of ulcerative colitis patients becomes aberrant. The abnormal interaction between microflora and intestinal mucosal immune system leads the mucosal inflammation. Probiotic administration may recover the commensal microflora and normalise the host-microbial interaction. In this experiment, we cocultured colonic biopsies from active ulcerative colitis patients with bifidobacterium to investigate the modulation effect of probiotics on inflamed colonic tissues and its possible mechanism. Colonic biopsies from active ulcerative colitis were cocultured for 24 h with Bifidobacterium longum. Tumour necrosis factor (TNF)-alpha and interleukin (IL)-8 in supernatants were measured using enzyme-linked immunosorbent assays, the biopsies were fixed using paraffin and the expression of NF-kappaB P65 of tissues was studied using immunohistochemical staining. The concentrations of TNF-alpha and IL-8 in supernatants of tissues cocultured with probiotics were lower than those cultured alone. The number of lamina propria mononuclear cells (LPMC) with nuclear factor-kappa B (NF-kappaB) P65 positive in cocultured tissues was also decreased. When cocultured with inflamed tissues of active ulcerative colitis, probiotics could inhibit NF-kappaB activation in LPMC and down-regulate inflammatory cytokine secretion from inflamed tissues of active ulcerative colitis. This article was published in Int J Clin Pract and referenced in Journal of Microbial & Biochemical Technology

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