The Notch signalling pathway regulates cell fate and differentiation decisions during development. Constitutive activation of Notch signalling represses differentiation and induces proliferation in many cell systems, and is associated with human neoplasias. Findings in cell culture and in invertebrates implicate Notch signalling in skeletal myogenesis, but there remains no supporting evidence in vivo in mammalian embryos. The hypothesis that Notch pathway regulators repress myogenesis will be directly tested by targeting mouse myf5, the earliest expressed myogenic determination gene, with a dominant active notch1 allele, NICD. Under the direction of myf5 regulatory elements, myf5NICD should be expressed in muscle precursor cells from early myogenesis to terminal muscle differentiation. Anatomical and molecular analysis of skeletal myogenesis and other myf5-dependent development processes will be performed on heterozygote and homozygote knock-in mouse embryos. These experiments offer insight into the role of Notch signalling throughout myogenesis in vivo.

Agency
National Institute of Health (NIH)
Institute
Eunice Kennedy Shriver National Institute of Child Health & Human Development (NICHD)
Type
Postdoctoral Individual National Research Service Award (F32)
Project #
5F32HD008570-02
Application #
6184000
Study Section
Special Emphasis Panel (ZRG1-CTY (01))
Program Officer
Javois, Lorette Claire
Project Start
2000-08-05
Project End
Budget Start
2000-08-05
Budget End
2001-08-04
Support Year
2
Fiscal Year
2000
Total Cost
$38,628
Indirect Cost
Name
Pasteur Institute
Department
Type
DUNS #
City
Paris Cedex 15
State
Country
France
Zip Code
75724