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PMID:10588713

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Citation

Kioussi, C, O'Connell, S, St-Onge, L, Treier, M, Gleiberman, AS, Gruss, P and Rosenfeld, MG (1999) Pax6 is essential for establishing ventral-dorsal cell boundaries in pituitary gland development. Proc. Natl. Acad. Sci. U.S.A. 96:14378-82

Abstract

Pax6, a highly conserved member of the paired homeodomain transcription factor family that plays essential roles in ocular, neural, and pancreatic development and effects asymmetric transient dorsal expression during pituitary development, with its expression extinguished before the ventral --> dorsal appearance of specific cell types. Analysis of pituitary development in the Small eye and Pax6 -/- mouse mutants reveals that the dorsoventral axis of the pituitary gland becomes ventralized, with dorsal extension of the transcriptional determinants of ventral cell types, particularly PFrk. This ventralization is followed by a marked decrease in terminally differentiated dorsal somatotrope and lactotrope cell types and a marked increase in the expression of markers of the ventral thyrotrope cells and SF-1-expressing cells of gonadotrope lineage. We suggest that the transient dorsal expression of Pax6 is essential for establishing a sharp boundary between dorsal and ventral cell types, based on the inhibition of Shh ventral signals.

Links

PubMed PMC24444

Keywords

Animals; DNA-Binding Proteins/physiology; Eye Proteins; Growth Hormone/analysis; Hedgehog Proteins; Homeodomain Proteins; Mice; Paired Box Transcription Factors; Pituitary Gland/cytology; Pituitary Gland/embryology; Prolactin/analysis; Proteins/physiology; Repressor Proteins; Trans-Activators

Significance

Annotations

Gene product Qualifier GO ID GO term name Evidence Code with/from Aspect Notes Status


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References

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