Expression of transcription factor HNF-4 in the extraembryonic endoderm, gut, and nephrogenic tissue of the developing mouse embryo: HNF-4 is a marker for primary endoderm in the implanting blastocyst.
The expression of HNF-4 (hepatocyte nuclear factor 4) mRNA in postimplantation mouse embryos was analyzed by in situ hybridization. Expression was found in the primary endoderm at embryonic day 4.5 and was restricted to the columnar visceral endoderm cells of the yolk sac from day 5.5 to day 8.5. HNF-4 mRNA was first detected in embryonic tissues at day 8.5, in the liver diverticulum and the hindgut. At later times HNF-4 transcripts were observed in the mesonephric tubules, pancreas, stomach, and intestine and, still later, in the metanephric tubules of the developing kidney. This expression pattern suggests that HNF-4 has a role in the earliest stages of murine postimplantation development as well as in organogenesis.
Duncan
S A
SA
Department of Molecular Cell Biology, Rockefeller University, New York, NY 10021.
Manova
K
K
Chen
W S
WS
Hoodless
P
P
Weinstein
D C
DC
Bachvarova
R F
RF
Darnell
J E
JE
D000818:Animals; D001483:Base Sequence; D051778:Basic Helix-Loop-Helix Leucine Zipper Transcription Factors; D004268:DNA-Binding Proteins; D004064:Digestive System / Q000196:embryology*; D004707:Endoderm / Q000502:physiology*; D017930:Genes, Reporter; D051557:Hepatocyte Nuclear Factor 4; D017403:In Situ Hybridization; D007668:Kidney / Q000196:embryology*; D008099:Liver / Q000196:embryology*; D051379:Mice; D008969:Molecular Sequence Data; D010750:Phosphoproteins; D011993:Recombinant Fusion Proteins / Q000096:biosynthesis; D014157:Transcription Factors / Q000096:biosynthesis*
D051778:Basic Helix-Loop-Helix Leucine Zipper Transcription Factors; D004268:DNA-Binding Proteins; D051557:Hepatocyte Nuclear Factor 4; D010750:Phosphoproteins; D011993:Recombinant Fusion Proteins; C501970:Tcfl4 protein, mouse; D014157:Transcription Factors