Notochord to endoderm signaling is required for pancreas development

Seung K. Kim, Matthias Hebrok, Douglas A. Melton

Research output: Contribution to journalArticlepeer-review

346 Scopus citations

Abstract

The role of the notochord in inducing and patterning adjacent neural and mesodermal tissues is well established. We provide evidence that the notochord is also required for one of the earliest known steps in the development of the pancreas, an endodermally derived organ. At a developmental stage in chick embryos when the notochord touches the endoderm, removal of notochord eliminates subsequent expression of several markers of dorsal pancreas bud development, including insulin, glucagon and carboxypeptidase A. Pancreatic gene expression can be initiated and maintained in prepancreatic chick endoderm grown in vitro with notochord. Non-pancreatic endoderm, however, does not express pancreatic genes when recombined with the same notochord. The results suggest that the notochord provides a permissive signal to endoderm to specify pancreatic fate in a stepwise manner.

Original languageEnglish
Pages (from-to)4243-4252
Number of pages10
JournalDevelopment (Cambridge)
Volume124
Issue number21
StatePublished - 1997
Externally publishedYes

Keywords

  • Cell signaling
  • Chicken
  • Endoderm
  • Notochord
  • Pancreas organogenesis

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