Wnt blockade with dickkopf reduces intestinal crypt fission and intestinal growth in infant rats

Jane K. Fauser, Rino P. Donato, Joshua A. Woenig, Simon J. Proctor, Andrew P. Trotta, Phulwinder K. Grover, Gordon S. Howarth, Irmeli A. Penttila, Adrian G. Cummins

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


Objectives: Intestinal crypt fission peaks during infancy. In human and experimental familial polyposis coli, increased crypt fission is due to activation of Wnt/β-catenin signalling, but the molecular basis of crypt fission during intestinal growth has not been examined. The aim of this project was to investigate whether crypt fission and intestinal growth are affected by experimental blockade of the Wnt/β-catenin signalling pathway. Methods: Hooded Wistar rats were given either the Wnt inhibitor, dickkopf (30 and 100ng), daily or vehicle control intraperitoneally from days 11 to 15 and were killed at day 16. Intestinal morphometry was used to measure villous area, crypt area, percentage of crypt fission, and crypt mitotic count. Intestinal stem cells were assessed by expression of real time-polymerase chain reaction for Lgr5 (a stem cell marker), and the number of β-catenin-expressing crypts by immunostaining was determined after 100-ng dickkopf treatment. Results: Dickkopf at 30 and 100ng/day reduced villous area to 71% (P=0.013) and 29% (P<0.0001), crypt area to 42% (P=0.0026) and 30% (P=0.0067), and crypt fission to 51% (P=0.006) and 29% (P<0.0001), respectively, of control values. Mitotic count per crypt did not change. Lgr5 RNA expression and the number of β-catenin-expressing crypts decreased in dickkopf-treated animals. Conclusions: We conclude that intestinal crypt fission during infancy is mediated by Wnt signalling. It is possible that local treatment with Wnt agonists could be used to increase intestinal growth.

Original languageEnglish
Pages (from-to)26-31
Number of pages6
JournalJournal of Pediatric Gastroenterology and Nutrition
Issue number1
Publication statusPublished - 1 Jul 2012


  • crypt fission
  • intestinal growth
  • intestinal stem cells

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health
  • Gastroenterology

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