Pax 4 and 6 regulate gastrointestinal endocrine cell development.
The mechanisms behind the cell-specific and compartmentalized expression of gut and pancreatic hormones is largely unknown. We hereby report that deletion of the Pax 4 gene virtually eliminates duodenal and jejunal hormone-secreting cells, as well as serotonin and somatostatin cells of the distal stomach, while deletion of the Pax 6 gene eliminates duodenal GIP cells as well as gastrin and somatostatin cells of the distal stomach. Thus, together, these two genes regulate the differentiation of all proximal gastrointestinal endocrine cells and reflect common pathways for pancreatic and gastrointestinal endocrine cell differentiation.
Larsson
L I
LI
Department of Molecular Cell Biology, Statens Serum Institut, Copenhagen, Denmark. Larsson@biobase.dk
St-Onge
L
L
Hougaard
D M
DM
Sosa-Pineda
B
B
Gruss
P
P
D000818:Animals; D002454:Cell Differentiation / Q000235:genetics; D004268:DNA-Binding Proteins / Q000235:genetics* / Q000378:metabolism; D004064:Digestive System / Q000166:cytology* / Q000378:metabolism*; D004386:Duodenum / Q000378:metabolism / Q000473:pathology; D019858:Enteroendocrine Cells / Q000378:metabolism* / Q000473:pathology; D005136:Eye Proteins; D005755:Gastrins / Q000378:metabolism; D017353:Gene Deletion; D018398:Homeodomain Proteins / Q000235:genetics* / Q000378:metabolism; D007150:Immunohistochemistry; D051379:Mice; D008817:Mice, Mutant Strains; D000071841:PAX6 Transcription Factor; D051761:Paired Box Transcription Factors; D012097:Repressor Proteins; D020133:Reverse Transcriptase Polymerase Chain Reaction; D012701:Serotonin / Q000378:metabolism; D013004:Somatostatin / Q000378:metabolism; D014157:Transcription Factors / Q000235:genetics* / Q000378:metabolism; D001616:beta-Galactosidase / Q000235:genetics / Q000276:immunology / Q000378:metabolism
D004268:DNA-Binding Proteins; D005136:Eye Proteins; D005755:Gastrins; D018398:Homeodomain Proteins; D000071841:PAX6 Transcription Factor; D051761:Paired Box Transcription Factors; C110218:Pax4 protein, mouse; C000605732:Pax6 protein, mouse; D012097:Repressor Proteins; D014157:Transcription Factors; D012701:Serotonin; D013004:Somatostatin; D001616:beta-Galactosidase