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Regulation of Chamber-Specific Gene Expression in the Developing Heart by Irx4

Bao, Zheng-Zheng, Bruneau, Benoit G., Seidman, J. G., Seidman, Christine E., Cepko, Constance L.·1999·Science

Abstract

The vertebrate heart consists of two types of chambers, the atria and the ventricles, which differ in their contractile and electrophysiological properties. Little is known of the molecular mechanisms by which these chambers are specified during embryogenesis. Here a chicken iroquois -related homeobox gene, Irx4 , was identified that has a ventricle-restricted expression pattern at all stages of heart development. Irx4 protein was shown to regulate the chamber-specific expression of myosin isoforms by activating the expression of the ventricle myosin heavy chain–1 ( VMHC1 ) and suppressing the expression of the atrial myosin heavy chain–1 ( AMHC1 ) in the ventricles. Thus, Irx4 may play a critical role in establishing chamber-specific gene expression in the developing heart.

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Metadata

Authors
Bao, Z.-Z., Bruneau, B. G., Seidman, J. G., Seidman, C. E., & Cepko, C. L.
Venue
Science
Published
1999-02-19
Volume
283
Issue
5405
Pages
1161-1164
ISSN
  • 0036-8075 (ISSN-L)
  • 1095-9203
OpenAlex
W2086282126
Cited by
245
References
0
FWCI
7.83
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Regulation of Chamber-Specific Gene Expression in the Developing Heart by Irx4. https://app.cochat.ai/papers/10.1126/science.283.5405.1161
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Bao, Z.-Z., Bruneau, B. G., Seidman, J. G., Seidman, C. E., & Cepko, C. L. (1999). Regulation of Chamber-Specific Gene Expression in the Developing Heart by Irx4. Science. https://doi.org/10.1126/science.283.5405.1161

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

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