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Dorsal cell fate specified by chick Lmx1 during vertebrate limb development.

Vogel, A. ; Rodriguez, C. ; Warnken, W. ; Izpisúa Belmonte, J. C. (1995):
Dorsal cell fate specified by chick Lmx1 during vertebrate limb development.
In: Nature, 378 (6558), pp. 716-20. ISSN 0028-0836,
[Article]

Abstract

The positional cues that govern the fate of cells along the dorsoventral axis of the developing vertebrate limb are established in the mesoderm before outgrowth of limb buds. In Drosophila, a LIM/-homeodomain gene, apterous, expressed in the dorsal compartment of the wing disc, specifies dorsal cell fate. Here we report the isolation of a vertebrate LIM-homeodomain containing gene, Chick Lmx1 (C-Lmx1). Transcripts for C-Lmx1 are detected in the presumptive dorsal limb mesoderm and are restricted thereafter to the dorsal mesoderm of the developing chick bud. C-Lmx1 expression is regulated by the overlying ectoderm where Wnt7a messenger RNA is localized. Wnt7a, required for normal development of the dorsoventral axis in mouse limbs, can induce ectopic expression of C-Lmx1 in ventral mesoderm. Misexpression of C-Lmx1 during limb outgrowth causes ventral to dorsal transformations of limb mesoderm. We propose that C-Lmx1 specifies dorsal cell fate during chick limb development.

Item Type: Article
Erschienen: 1995
Creators: Vogel, A. ; Rodriguez, C. ; Warnken, W. ; Izpisúa Belmonte, J. C.
Title: Dorsal cell fate specified by chick Lmx1 during vertebrate limb development.
Language: English
Abstract:

The positional cues that govern the fate of cells along the dorsoventral axis of the developing vertebrate limb are established in the mesoderm before outgrowth of limb buds. In Drosophila, a LIM/-homeodomain gene, apterous, expressed in the dorsal compartment of the wing disc, specifies dorsal cell fate. Here we report the isolation of a vertebrate LIM-homeodomain containing gene, Chick Lmx1 (C-Lmx1). Transcripts for C-Lmx1 are detected in the presumptive dorsal limb mesoderm and are restricted thereafter to the dorsal mesoderm of the developing chick bud. C-Lmx1 expression is regulated by the overlying ectoderm where Wnt7a messenger RNA is localized. Wnt7a, required for normal development of the dorsoventral axis in mouse limbs, can induce ectopic expression of C-Lmx1 in ventral mesoderm. Misexpression of C-Lmx1 during limb outgrowth causes ventral to dorsal transformations of limb mesoderm. We propose that C-Lmx1 specifies dorsal cell fate during chick limb development.

Journal or Publication Title: Nature
Journal volume: 378
Number: 6558
Divisions: 10 Department of Biology > Developmental Biology and Neurogenetics
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10 Department of Biology
Date Deposited: 24 Jan 2011 10:40
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