Visceral endoderm-1 (VE-1): an antigen marker that distinguishes anterior from posterior embryonic visceral endoderm in the early post-implantation mouse embryo

Mech Dev. 1995 Jan;49(1-2):117-21. doi: 10.1016/0925-4773(94)00308-a.

Abstract

We describe here an antigen marker, designated VE-1, that is detected early in gastrulation (approximately E6.5 through approximately E7.25) in the anterior visceral endoderm overlying the embryonic ectoderm opposite the primitive streak. The antibody-positive domain extends from the embryonic-extraembryonic junction to the distal tip of the embryo, and laterally around approximately one-third of the circumference of the egg cylinder. Analysis of embryos at earlier stages indicates that VE-1 is first expressed shortly after implantation, at approximately E5.0, in the visceral endoderm on one side of the embryo and thus is the earliest molecular marker of A-P asymmetry in the post-implantation mouse embryo described to date. Although VE-1 was detected with a polyclonal antiserum raised against a 24 amino acid polypeptide sequence of FGF2, we provide evidence that the VE-1 antigen is not FGF2. The data reported here are the first to provide molecular evidence that A-P polarity in the mouse embryo is established by E5.0 and that the visceral endoderm has A-P polarity.

Publication types

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

MeSH terms

  • Animals
  • Antigens, Differentiation / analysis
  • Cell Polarity / immunology
  • Embryonic Development
  • Endoderm / immunology*
  • Epitopes
  • Female
  • Gastrula / immunology*
  • Mice
  • Pregnancy
  • Viscera / embryology*
  • Viscera / immunology

Substances

  • Antigens, Differentiation
  • Epitopes