Increased Expression Levels of Soluble Fms-Like Tyrosine Kinase-1 Inhibits Nervous System Development of Zebrafish

Abstract

Introduction Preeclampsia (PE) remains a leading cause of maternal and perinatal morbidity. At present, the treatments of preeclampsia are limited, and many patients need to terminate the pregnancy to relieve the disease. Soluble fms-like tyrosine kinase-1 (sFlt-1) is a decoy receptor of placental growth factor (PIGF) and vascular endothelial growth factor which can promote angiogenesis. Its level increases throughout pregnancy with preeclampsia and umbilical cord blood of their newborns. Material and methods In this experiment, we constructed zebrafish with high expression levels of sFlt-1 and explored their changes of nervous system developments and behaviors. Results Comparing with the WT group and the casRx group, the cerebral vascular developments at 72 h in the F1、F2 group were significantly decreased, the ratios of brain volume area to whole body area at 96 h were significantly decreased, and the behavioral trajectory distances and movement speeds at 6th day were shortened and slowed down. Conclusions The increased expression levels of sFlt-1 in zebrafish can inhibit the developments of cerebral blood vessels, brain volumes and the behavioral activities. It is speculated that elevated sFlt-1 in the pathological state of PE can inhibit the developments of nervous system in offspring.