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The gene tinman is required for specification of the heart and visceral muscles in Drosophila

Bodmer, Rolf·1993·Development

Abstract

The homeobox-containing gene tinman (msh-2, Bodmer et al., 1990Development 110, 661-669) is expressed in the mesoderm primordium, and this expression requires the function of the mesoderm determinant twist. Later in development, as the first mesodermal subdivisions are occurring, expression becomes limited to the visceral mesoderm and the heart. Here, I show that the function of tinman is required for visceral muscle and heart development. Embryos that are mutant for the tinman gene lack the appearance of visceral mesoderm and of heart primordia, and the fusion of the anterior and posterior endoderm is impaired. Even though tinman mutant embryos do not have a heart or visceral muscles, many of the somatic body wall muscles appear to develop although abnormally. When the tinman cDNA is ubiquitously expressed in tinman mutant embryos, via a heatshock promoter, formation of heart cells and visceral mesoderm is partially restored. tinman seems to be one of the earliest genes required for heart development and the first gene reported for which a crucial function in the early mesodermal subdivisions has been implicated.

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Crossref · 10.1242/dev.118.3.719

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Metadata

Authors
Bodmer, R.
Venue
Development
Published
1993-07-01
Volume
118
Issue
3
Pages
719-729
ISSN
  • 0950-1991 (ISSN-L)
  • 1477-9129
OpenAlex
W2111525541
Cited by
797
References
0
FWCI
10.74
Type
journal article
Language
en
Open access
closed

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