Diagnostic signature and immune characteristic of aging-related genes from placentas in Preeclampsia

Preeclampsia (PE) is a serious pregnancy syndrome. Advanced maternal age (≥ 35 years old) is one of the major risk factors of PE and placental aging is considered to be related to this disease. However, the mechanisms underlying these phenomena remain obscured. Gene expression profiles of PE and non-PE placental samples were curated from the GSE75010 dataset. A diagnostic model was constructed and immune characteristics of PE subtypes were estimated. A total of 58 aging-related genes, which may be associated with PE, were identified. Among them, <i>LEP</i> and <i>FLT1</i> may be key aging-related genes. Based on 5 top genes (<i>PIK3CB, FLT1, LEP, PIK3R1, CSNK1E</i>), a diagnostic nomogram for PE was built (AUC = 0.872 in the GSE75010 dataset). Three molecular subtypes were clustered, which had different immune and angiogenesis characteristics. The present study suggests the potential implications of aging-related genes in diagnosing PE. Diverse immune characteristics may be involved in the placental aging of PE.