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[Role of MUC2 gene in the regulation of rat intestinal barrier function by probiotics]

Jingyi Yu1, Xiaoyan Hao, Min Long

  • 1Department of Microbiology, Southern Medical University, Guangzhou, China. jyyu1001@126.com

Nan Fang Yi Ke Da Xue Xue Bao = Journal of Southern Medical University
|February 28, 2013
PubMed
Abstract

Insights

Probiotics boost MUC2 expression in rat colons, enhancing the intestinal barrier against E. coli K1 (E44) penetration. Silencing MUC2 reduces this protective effect, highlighting MUC2

Area of Science:

  • Microbiology
  • Gastroenterology
  • Immunology

Background:

  • The intestinal barrier is crucial for preventing pathogen translocation.
  • Mucin 2 (MUC2) plays a vital role in maintaining intestinal barrier integrity.
  • Probiotics are known to modulate the gut microbiota and immune responses.

Purpose of the Study:

  • To investigate the effect of probiotics on MUC2 expression in rat colons.
  • To determine how MUC2 expression influences the inhibition of E. coli K1 (E44) penetration by probiotics.

Main Methods:

  • Rats were treated with probiotics, E44, or both.
  • MUC2 expression was analyzed using RT-PCR in rat colons.
  • Lovo cells were transfected with MUC2-targeted shRNA to assess knockdown efficiency.
  • Competitive exclusion assays evaluated probiotic efficacy against E44 adhesion and invasion.

Main Results:

  • Probiotic administration upregulated MUC2 mRNA expression in rat colons.
  • E44 administration significantly decreased MUC2 expression.
  • MUC2 knockdown in Lovo cells attenuated the inhibitory effects of probiotics against E44 adherence and invasion.

Conclusions:

  • Probiotic-induced MUC2 upregulation is a mechanism for antagonizing pathogenic bacterial translocation.
  • MUC2 plays a critical role in the probiotic inhibition of E. coli K1 penetration.

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