Analysis of epithelial-mesenchymal interactions in the initial morphogenesis of the mammalian tooth.

Analysis of epithelial-mesenchymal interactions in the initial morphogenesis of the mammalian tooth. Research Abstract Details 

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Analysis of epithelial-mesenchymal interactions in the initial morphogenesis of the mammalian tooth. Abstract Text:

H R Dassule,A P McMahon,

Epithelial-mesenchymal interactions govern the development of epidermal organs such as teeth. During the early stages of tooth development, a local ectodermal thickening which expresses several signaling molecules appears. It is believed that these in turn signal to the underlying mesenchyme triggering mesenchymal condensation and tooth development. For example, epithelially expressed Bmp4 induces Msx1 and Lef1 as well as itself in the underlying mesenchyme. In this paper we have investigated the role of four epithelial signaling molecules, Bmp2, Shh, Wnt10a, and Wnt10b, in the early inductive cascades that govern tooth development. We show that all four genes are specifically expressed in the epithelium between E11.0 and E12.0 when tooth morphogenesis is first apparent. Although Shh, Bmp2, and Wnt10b have similar, if not identical, expression patterns, each signal has a distinct molecular action on the jaw mesenchyme. Whereas Shh and Wnt10b can induce general Hedgehog and Wnt targets, Ptc and Gli for Shh and Lef1 for Wnt10b, only Bmp2 is able to induce tooth-specific expression of Msx1. Thus, there are distinct targets for all three pathways. Interestingly, both Bmp and Wnt signaling activate Lef1, making it a candidate for integrating the two distinct signaling pathways.

Analysis of epithelial-mesenchymal interactions in the initial morphogenesis of the mammalian tooth. Publishing Authors By Initials

HR Dassule,AP McMahon,

For similar peptides: intercellular signaling peptides and proteins: wnt proteins research abstracts see: peptides: intercellular signaling peptides and proteins: wnt proteins research

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Analysis of epithelial-mesenchymal interactions in the initial morphogenesis of the mammalian tooth. Journal Published:

PUBLICATION TYPE: Research Support, U.S. Gov't,

Journal: Developmental biology

VOLUME: 202

Page Numbers: 215-27

Journal Abbreviation: Dev. Biol.

ISSN: 0012-1606

DAY: 15

MONTH: Oct

YEAR: 1998

Analysis of epithelial-mesenchymal interactions in the initial morphogenesis of the mammalian tooth. Information

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LANGUAGE: eng

NlmUniqueID: 372762

Analysis of epithelial-mesenchymal interactions in the initial morphogenesis of the mammalian tooth. Keywords Mesh Terms:

KEYWORDS: Wnt Proteins

MESH TERMS: physiology

Chemical & Substance for Abstract: Analysis of epithelial-mesenchymal interactions in the initial morphogenesis of the mammalian tooth. Information

Substance Name: bone morphogenetic protein 2

Registry Number: 0

Grant and Affiliation Information for Analysis of epithelial-mesenchymal interactions in the initial morphogenesis of the mammalian tooth.

AFFILIATION: The Biolabs, Harvard University, 16 Divinity Avenue, Cambridge, Massachusetts 02138, USA.

Country: UNITED STATES

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MEDLINETA: Dev Biol

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