Genetic insights into sporadic patent ductus arteriosus: the role of ACTC1 promoter variants

Patent ductus arteriosus (PDA) is a congenital cardiovascular condition characterized by the failure of the ductus arteriosus, a fetal vascular connection between the pulmonary artery and aorta, to close after birth. Physiologic closure of the ductus arteriosus is a tightly regulated process involving oxygen-mediated vasoconstriction, prostaglandin signaling, and subsequent vascular remodeling. Although environmental and perinatal factors, such as prematurity and respiratory distress syndrome, are well-recognized contributors, increasing evidence supports a role for genetic factors in modulating susceptibility to PDA. 1 The ACTC1 gene encodes α-cardiac actin, which is essential for cardiac contraction. Pathogenic variants of ACTC1 have been linked to a broad spectrum of cardiovascular phenotypes, including septal defects and cardiomyopathies. 2 However, the potential role of ACTC1 variants in the pathogenesis of PDA has yet to be elucidated. Zheng et al.’s article 3 entitled “Genetic variants of ACTC1 gene promoter in pediatric patients with sporadic patent ductus arteriosus and pathological significance” in the recent issue of Pediatric Research , represents an initial step toward addressing these gaps. In this commentary, we evaluate the strengths and limitations of this study and propose areas for future research.