Expression of the mouse Delta1 gene during organogenesis and fetal development

Mech Dev. 1999 Jun;84(1-2):165-8. doi: 10.1016/s0925-4773(99)00065-9.


Cell-to-cell communication mediated by the evolutionary conserved Notch signalling pathway regulates cell fate decisions and patterning in various tissues in diverse organisms (Artavanis-Tsakonas et al., 1995, Science 268, 225-232). Signalling between neighboring cells is transduced by binding of DSL and Notch proteins which interact as ligand (DSL) and receptor (Notch). Mouse Delta1 (delta-like 1; Dll1) encodes one of the four known mammalian DSL proteins and is essential for normal somitogenesis and neuronal differentiation. Here, we describe Delta1 expression during organogenesis and fetal development using the highly sensitive histochemical detection of the lacZ gene product expressed from a targeted Delta1:lacZ knock-in allele (Dll1(lacZ)). We find that Delta1 is expressed in epithelial ducts of several organs, skeletal and smooth muscles, the central nervous system, as well as some sensory epithelia.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Animals
  • Brain / embryology
  • Brain / metabolism
  • Endothelium, Vascular / embryology
  • Endothelium, Vascular / metabolism
  • Epithelium / embryology
  • Epithelium / metabolism
  • Gene Expression Regulation, Developmental*
  • Hair / embryology
  • Hair / metabolism
  • Heterozygote
  • Intracellular Signaling Peptides and Proteins
  • Kidney / cytology
  • Kidney / embryology
  • Kidney / metabolism
  • Membrane Proteins / genetics*
  • Membrane Proteins / metabolism
  • Mice
  • Mice, Transgenic
  • Muscle, Skeletal / embryology
  • Muscle, Skeletal / metabolism
  • Neurons / metabolism
  • beta-Galactosidase / genetics
  • beta-Galactosidase / metabolism


  • Intracellular Signaling Peptides and Proteins
  • Membrane Proteins
  • delta protein
  • beta-Galactosidase