VegT induces endoderm by a self-limiting mechanism and by changing the competence of cells to respond to TGF-beta signals
UNSPECIFIED (2003) VegT induces endoderm by a self-limiting mechanism and by changing the competence of cells to respond to TGF-beta signals. DEVELOPMENTAL BIOLOGY, 258 (2). pp. 454-463. ISSN 0012-1606Full text not available from this repository.
Official URL: http://dx.doi.org/10.1016/S0012-1606(03)00124-6
The maternal determinant VegT is required for both endoderm, and mesoderm formation by the Xenopus embryo. An important downstream mediator of VegT action is Xsox17, which has been proposed to be induced in cell-autonomous, then signal-dependent phases. We show that Xsox17 is a direct VegT target, but that direct induction of Xsox17 by VegT is rapidly inhibited. This inhibition is relieved by TGF- beta signalling, to which the future endoderm cell is sensitised by VegT, resulting in the observed dependence on cell contact for maintained Xsox17 expression. We propose that this change in regulation is a consequence of a VegT-induced repressor, inhibiting direct induction of early endoderm markers by VegT, and contributing to the formation of the boundary of the endodermal domain. (C) 2003 Elsevier Science (USA). All rights reserved.
|Item Type:||Journal Article|
|Subjects:||Q Science > QH Natural history > QH301 Biology|
|Journal or Publication Title:||DEVELOPMENTAL BIOLOGY|
|Publisher:||ACADEMIC PRESS INC ELSEVIER SCIENCE|
|Date:||15 June 2003|
|Number of Pages:||10|
|Page Range:||pp. 454-463|
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