Renal agenesis and hypodysplasia in ret-k- mutant mice result from defects in ureteric bud development

Anita Schuchardt, Vivette D'Agati, Vassilis Pachnis, Frank Costantin

Research output: Contribution to journalArticle

252 Citations (Scopus)

Abstract

The c-ret gene encodes a receptor tyrosine kinase that is expressed in the Wolffian duct and ureteric bud of the developing excretory system. Newborn mice homozygous for a mutation in c-ret displayed renal agenesis or severe hypodysplasia, suggesting a critical role for this gene in metanephric kidney development. To investigate the embryological basis of these defects, we characterized the early development of the excretory system in mutant homozygotes, and observed a range of defects in the formation, growth and branching of the ureteric bud, which account for the spectrum of renal defects seen at birth. Co-culture of isolated ureteric buds and metanephric mesenchyme show that the primary defect is intrinsic to the ureteric bud. While the mutant bud failed to respond to induction by wild-type mesenchyme, mutant mesenchyme was competent to induce the growth and branching of the wild-type bud. Furthermore, the mutant metanephric mesenchyme displayed a normal capacity to differentiate into nephric tubules when co-cultured with embryonic spinal cord. These findings suggest a model in which c-ret encodes the receptor for a (yet to be identified) factor produced by the metanephric mesenchyme, which mediates the inductive effects of this tissue upon the ureteric bud. This factor appears to stimulate the initial evagination of the ureteric bud from the Wolffian duct, as well as its subsequent growth and branching.

Original languageEnglish (US)
Pages (from-to)1919-1929
Number of pages11
JournalDevelopment
Volume122
Issue number6
StatePublished - Jul 5 1996

Fingerprint

Mesoderm
bud
defect
Wolffian Ducts
Kidney
induction
Growth
Homozygote
Receptor Protein-Tyrosine Kinases
Coculture Techniques
Genes
Spinal Cord
Hereditary renal agenesis
mutant
gene
Parturition
Mutation
mutation

Keywords

  • Induction
  • Kidney development
  • Metanephric mesenchyme
  • Mouse
  • Receptor tyrosine kinase
  • Renal agenesis
  • Ureteric bud
  • c-ret gene

Cite this

Renal agenesis and hypodysplasia in ret-k- mutant mice result from defects in ureteric bud development. / Schuchardt, Anita; D'Agati, Vivette; Pachnis, Vassilis; Costantin, Frank.

In: Development, Vol. 122, No. 6, 05.07.1996, p. 1919-1929.

Research output: Contribution to journalArticle

Schuchardt, Anita ; D'Agati, Vivette ; Pachnis, Vassilis ; Costantin, Frank. / Renal agenesis and hypodysplasia in ret-k- mutant mice result from defects in ureteric bud development. In: Development. 1996 ; Vol. 122, No. 6. pp. 1919-1929.
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