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Cited by 353

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GATA4 is essential for formation of the proepicardium and regulates cardiogenesis

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Watt, Alistair J., Battle, Michele A., Li, Jixuan, Duncan, Stephen A.·2004·Proceedings of the National Academy of Sciences

Abstract

The role of GATA4 during the earliest stages of cardiogenesis has not been defined because Gata4 knockout embryos suffer an early developmental arrest caused by deficiencies in extraembryonic visceral endoderm function. We have used tetraploid embryo complementation to rescue these defects and generated clonal embryonic day 9.5 Gata4 –/– embryos directly from embryonic stem cells. GATA4-null embryos display heart defects characterized by disrupted looping morphogenesis, septation, and a hypoplastic ventricular myocardium. We find that myocardial gene expression is relatively normal in GATA4-null hearts including expression of GATA6. Moreover, GATA4 expression in the endocardium is dispensable for trabeculae formation. Remarkably, the proepicardium is absent in GATA4-null embryos, blocking formation of the epicardium. Therefore, we propose that the observed myocardial defects may be a secondary consequence of loss of the proepicardium. These findings definitively demonstrate a requirement for GATA4 during early cardiac development and identify an essential factor for generation of the proepicardium.

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Metadata

Authors
Watt, A. J., Battle, M. A., Li, J., & Duncan, S. A.
Venue
Proceedings of the National Academy of Sciences
Published
2004-08-13
Volume
101
Issue
34
Pages
12573-12578
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2019127826
Cited by
353
References
2
FWCI
6.56
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: GATA4 is essential for formation of the proepicardium and regulates cardiogenesis. https://app.cochat.ai/papers/10.1073/pnas.0400752101
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Watt, A. J., Battle, M. A., Li, J., & Duncan, S. A. (2004). GATA4 is essential for formation of the proepicardium and regulates cardiogenesis. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.0400752101

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