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Lkb1 deficiency alters goblet and paneth cell differentiation in the small intestine

Shorning, Boris, Zabkiewicz, Joanna ORCID:, McCarthy, Afshan, Pearson, Helen B. ORCID:, Winton, Douglas J., Sansom, Owen J., Ashworth, Alam and Clarke, Alan Richard ORCID: 2009. Lkb1 deficiency alters goblet and paneth cell differentiation in the small intestine. PLoS ONE 4 (1) , e4264. 10.1371/journal.pone.0004264

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The Lkb1 tumour suppressor is a multitasking kinase participating in a range of physiological processes. We have determined the impact of Lkb1 deficiency on intestinal homeostasis, particularly focussing on secretory cell differentiation and development since we observe strong expression of Lkb1 in normal small intestine Paneth and goblet cells. We crossed mice bearing an Lkb1 allele flanked with LoxP sites with those carrying a Cyp1a1-specific inducible Cre recombinase. Lkb1 was efficiently deleted from the epithelial cells of the mouse intestine after intraperitoneal injection of the inducing agent β-naphthoflavone. Bi-allelic loss of Lkb1 led to the perturbed development of Paneth and goblet cell lineages. These changes were characterised by the lack of Delta ligand expression in Lkb1-deficient secretory cells and a significant increase in the levels of the downstream Notch signalling effector Hes5 but not Hes1. Our data show that Lkb1 is required for the normal differentiation of secretory cell lineages within the intestine, and that Lkb1 deficiency modulates Notch signalling modulation in post-mitotic cells.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Biosciences
European Cancer Stem Cell Research Institute (ECSCRI)
Publisher: Public Library of Science
ISSN: 1932-6203
Date of First Compliant Deposit: 3 April 2019
Date of Acceptance: 8 December 2008
Last Modified: 02 May 2023 19:19

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