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Updated: Jul 31, 2026

Light-mediated Reversible Modulation of the Mitogen-activated Protein Kinase Pathway during Cell Differentiation and Xenopus Embryonic Development
09:32

Light-mediated Reversible Modulation of the Mitogen-activated Protein Kinase Pathway during Cell Differentiation and Xenopus Embryonic Development

Published on: June 15, 2017

Overlapping and specific functions of Braf and Craf-1 proto-oncogenes during mouse embryogenesis

L Wojnowski1, L F Stancato, A C Larner

  • 1Laboratory on Genetics, National Institute of Mental Health, Bethesda, MD, USA. lwojnowski@epidauros.com

Mechanisms of Development
|March 8, 2000
PubMed

Insights

Raf signaling is essential for mouse embryonic development beyond the blastocyst stage. However, Craf-1 and Braf exhibit functional redundancy, allowing either gene to support development until mid-gestation.

Area of Science:

  • Cellular signaling pathways
  • Developmental biology
  • Molecular genetics

Background:

  • Mammalian Raf serine/threonine protein kinases (Raf) are key signal transducers.
  • Raf signaling is linked to embryonic development in vertebrates.
  • Previous studies showed no pre-mid-gestation defects in single Raf gene knockout mouse embryos.

Purpose of the Study:

  • Investigate the role of Raf signaling in early mouse embryonic development.
  • Determine the developmental consequences of combined Craf-1 and Braf mutations.
  • Elucidate the mechanisms of functional redundancy between Craf-1 and Braf.

Main Methods:

  • Generation and analysis of mouse mutants with combined Craf-1 and Braf alleles.
  • Monitoring Raf gene expression during embryogenesis.
  • Biochemical studies using mutant cell lines.

Main Results:

  • Raf signaling is indispensable for development post-blastocyst stage.
  • Significant functional redundancy exists between Craf-1 and Braf.
  • Either Craf-1 or Braf alone supports normal development until mid-gestation.

Conclusions:

  • Raf signaling plays a critical, albeit redundant, role in early mammalian development.
  • Understanding Raf redundancy is key to deciphering developmental signaling pathways.
  • Further research into molecular mechanisms underlying this redundancy is warranted.

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