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SOX6 is expressed in various cell lineages in the developing mouse heart and contributes to proper valvuloseptal development.

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Related Experiment Video

Updated: Jun 23, 2025

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Inflow Tract Development.

Andy Wessels1

  • 1Department of Regenerative Medicine and Cell Biology, Medical University of South Carolina, Charleston, SC, USA. wesselsa@musc.edu.

Advances in Experimental Medicine and Biology
|June 17, 2024
PubMed
Summary
This summary is machine-generated.

The development of the heart's inflow tract involves complex remodeling, crucial for forming four chambers. The atrioventricular mesenchymal complex is key to these intricate cardiac developmental processes.

Keywords:
AV cushionAVSDAtrioventricular cushionBMP2Bone morphogenetic protein 2Coronary sinusDorsal mesenchymal protrusionDorsal mesocardiumFHFFirst heart fieldIslet1Left atriumMesenchymal capNkx2-5OFTOstium primumOutflow tractPFOPatent foramen ovalePulmonary veinPulmonary venous returnSHFSecond heart fieldSeptum primumSeptum secundumSinus venosusTGFb2Transforming growth factor-β 2Venous pole

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Area of Science:

  • Cardiovascular Development
  • Embryology
  • Cardiac Anatomy

Background:

  • Formation of the four-chambered heart involves intricate remodeling of the inflow tract.
  • Key events include septation, incorporation of venous structures, and defining pulmonary/systemic venous return pathways.

Purpose of the Study:

  • To highlight the critical role of the atrioventricular mesenchymal complex in heart development.
  • To elucidate the complex remodeling events of the cardiac inflow tract.

Main Methods:

  • Review of developmental biology literature.
  • Analysis of cardiac morphogenesis processes.

Main Results:

  • The atrioventricular mesenchymal complex, comprising AV cushions, pAS mesenchymal cap, and DMP, is essential for inflow tract development.
  • This complex orchestrates atrial chamber formation and septation.

Conclusions:

  • The atrioventricular mesenchymal complex is a pivotal structure in cardiac inflow tract morphogenesis.
  • Understanding its role is crucial for comprehending congenital heart defects.