ZFIN Image: Martin et al., 2023, Figure 7

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Figure 7

Model summarizing the consequences of Nr2f1a loss on atrial development.

Following its initial requirement promoting atrial cardiomyocyte (AC) differentiation (Duong et al., 2018), Nr2f1a is required to maintain AC identity within the arterial (outflow) and venous (inflow) regions of the zebrafish atrium. In the absence of Nr2f1a, cardiomyocytes within the enlarged atrioventricular canal (AVC), where there is expression of both AC and ventricular cardiomyocyte (VC) differentiation markers, progressively lose expression of AC differentiation markers and only express VC differentiation markers. Concurrently, more venous ACs progressively gain PC differentiation marker expression.

Acknowledgments

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