The inner of the two Muc2 mucin-dependent mucus layers in colon is devoid of bacteria
Malin E. V. Johansson,Mia Phillipson,Joel Petersson,Anna Velcich,Lena Holm,Gunnar C. Hansson +5 more
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TLDR
Findings show that the Muc2 mucin can build a mucus barrier that separates bacteria from the colon epithelia and suggest that defects in this mucus can cause colon inflammation.Abstract:
We normally live in symbiosis with approximately 10(13) bacteria present in the colon. Among the several mechanisms maintaining the bacteria/host balance, there is limited understanding of the structure, function, and properties of intestinal mucus. We now demonstrate that the mouse colonic mucus consists of two layers extending 150 mum above the epithelial cells. Proteomics revealed that both of these layers have similar protein composition, with the large gel-forming mucin Muc2 as the major structural component. The inner layer is densely packed, firmly attached to the epithelium, and devoid of bacteria. In contrast, the outer layer is movable, has an expanded volume due to proteolytic cleavages of the Muc2 mucin, and is colonized by bacteria. Muc2(-/-) mice have bacteria in direct contact with the epithelial cells and far down in the crypts, explaining the inflammation and cancer development observed in these animals. These findings show that the Muc2 mucin can build a mucus barrier that separates bacteria from the colon epithelia and suggest that defects in this mucus can cause colon inflammation.read more
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References
More filters
Journal ArticleDOI
Host-Bacterial Mutualism in the Human Intestine
TL;DR: New studies are revealing how the gut microbiota has coevolved with us and how it manipulates and complements the authors' biology in ways that are mutually beneficial.
Journal ArticleDOI
Combination of 16S rRNA-targeted oligonucleotide probes with flow cytometry for analyzing mixed microbial populations.
TL;DR: Fluorescent oligonucleotide hybridization probes were used to label bacterial cells for analysis by flow cytometry and the intensity of fluorescence was increased additively by the combined use of two or three fluorescent probes complementary to different regions of the same 16S rRNA.
Journal ArticleDOI
Inflammatory bowel disease: cause and immunobiology
TL;DR: How environmental factors, infectious microbes, ethnic origin, genetic susceptibility, and a dysregulated immune system can result in mucosal inflammation are discussed.
Journal ArticleDOI
Muc2-deficient mice spontaneously develop colitis, indicating that MUC2 is critical for colonic protection
Maria van der Sluis,Barbara A. E. de Koning,Adrianus C. J. M. de Bruijn,Anna Velcich,Jules P.P. Meijerink,Johannes B. van Goudoever,Hans A. Büller,Jan Dekker,Isabelle Van Seuningen,Ingrid B. Renes,Alexandra W. C. Einerhand +10 more
TL;DR: This study shows that Muc2 deficiency leads to inflammation of the colon and contributes to the onset and perpetuation of experimental colitis.
Journal ArticleDOI
Biochemistry and Genetics of von Willebrand Factor
TL;DR: Growing body of information about VWF synthesis, structure, and function has allowed the reclassification of VWD based upon distinct pathophysiologic mechanisms that appear to correlate with clinical symptoms and the response to therapy.
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