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Lkb1 Deficiency Alters Goblet and Paneth Cell Differentiation in the Small Intestine

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Date
2009-01
ICR Author
Ashworth, Alan
Author
Ashworth, A
Type
Journal Article
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Abstract
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 beta-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.
URI
https://repository.icr.ac.uk/handle/internal/1802
Collections
  • Breast Cancer Research
  • Molecular Pathology
Research team
Gene Function
Language
eng
License start date
2009-01
Citation
PLOS ONE, 2009, 4
Publisher
PUBLIC LIBRARY SCIENCE

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