The role of actin cytoskeleton in regulating the deployment process of mouse cardiac second heart field progenitor cells

Yi chuan = Hereditas
Zhong Ying LiuBai Yin Yuan

Abstract

The vertebrate heart tube originates from cardiogenic mesodermal cells in the early embryo, and subsequently elongates by progressive addition of second heart field (SHF) progenitor cells from adjacent pharyngeal mesoderm and splanchnic mesoderm. Insufficient addition of SHF cells to the heart tube causes the failure of maximal elongation of the heart tube, which results in a series of developmental defects including the most common congenital birth defects, such as right ventricular dysplasia and outflow tract septation, and alignment anomalies. SHF cells form an atypical, apicobasally polarized epithelium which is characterized by apical monocilia, and dynamic actin-rich basal filopodia. In this review, we summarize recent research progresses of actin cytoskeleton in the deployment process of mouse SHF progenitor cells, and reveal the significance of actin cytoskeleton in SHF development, especially in the deployment of SHF cells to the outflow tract, to provide theoretical reference for elucidating and understanding the biological characteristics of SHF deployment.

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