Xiujing Lu,* Xi Lan,* Xiaoqian Fu, Jing Li, Min Wu, Lu Xiao, Yachang Zeng

Department of Obstetrics and Gynecology, The First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, People’s Republic of China

*These authors contributed equally to this work

Correspondence: Yachang Zeng, Department of Obstetrics and Gynecology, The First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, People’s Republic of China, Email zengyachang@163.com

Purpose: Preeclampsia (PE) is a serious complication of obstetrics and represents a significant challenge in terms of understanding its underlying mechanism. It has been shown that a number of disorders involve dysregulation of the CBP/p300-interacting transactivator with glutamic acid/aspartic acid-rich carboxyl-terminal domain 2 (CITED2). However, the relationship between PE and CITED2 is still mostly unclear. This work aimed to confirm the hub genes linked to PE and explore the roles of CITED2 in trophoblast using experimental and bioinformatic methods.
Methods: To determine the hub genes, bioinformatics research was performed on two datasets from the Gene Expression Omnibus (GEO) public database. Immune infiltration analysis and enrichment analysis were also used to identify the related pathways and immune cells. PCR and WB were then used to validate the mRNA and protein levels of CITED2 in the PE samples. Finally, the expression of CITED2 was knocked down using siRNA to investigate the function of CITED2 in trophoblast development in vitro.
Results: The study’s findings showed that the NOTCH signaling pathways, glycolysis, and hypoxia were the main areas of enrichment for the six PE-related genes that were tested. The results of immune infiltration suggest that activated NK cells and regulatory T cells may play an important role in this process. CITED2 was significantly upregulated in the PE placenta. In functional tests, the knockdown of CITED2 may enhance apoptosis while suppressing migration, invasion, and proliferation of cells.
Conclusion: This study offers important proof that CITED2 influences trophoblast cell function and may one day be a therapeutic target for PE.

Keywords: preeclampsia, CITED2, placenta, cell function, bioinformatics