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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Regulation of intestinal alpha-defensin activation by the metalloproteinase matrilysin in innate host defense.

Precursors of alpha-defensin peptides require activation for bactericidal activity. In mouse small intestine, matrilysin colocalized with alpha-defensins (cryptdins) in Paneth cell granules, and in vitro it cleaved the pro segment from cryptdin precursors. Matrilysin-deficient (MAT-/-) mice lacked mature cryptdins and accumulated precursor molecules. Intestinal peptide preparations from MAT-/- mice had decreased antimicrobial activity. Orally administered bacteria survived in greater numbers and were more virulent in MAT-/- mice than in MAT+/+ mice. Thus, matrilysin functions in intestinal mucosal defense by regulating the activity of defensins, which may be a common role for this metalloproteinase in its numerous epithelial sites of expression.[1]

References

  1. Regulation of intestinal alpha-defensin activation by the metalloproteinase matrilysin in innate host defense. Wilson, C.L., Ouellette, A.J., Satchell, D.P., Ayabe, T., López-Boado, Y.S., Stratman, J.L., Hultgren, S.J., Matrisian, L.M., Parks, W.C. Science (1999) [Pubmed]
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