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A total of 30 late onset severe preeclampsia (LS-PE) patients and 30 early onset severe preeclampsia (ES-PE) patients were selected as Experimental group, and 30 normal pregnant were selected as Control group. Expression of S100 calcium-binding protein A8 (S100A8) mRNA was detected by reverse transcription polymerase chain reaction (RT-PCR). Enzyme-linked immunosorbent assay (ELISA) was used to detect expression of S100A8 protein and inflammatory factors. Levels of uric acid (UA) and creatinine (CRE) were measured using an automatic biochemical analyzer. Urinary protein (UPRO) content was measured using biuret colorimetry. S100A8 levels were significantly higher in experimental groups than in control groups at mRNA and protein levels (P < 0.05). Significantly increased contents of tumor necrosis factor (TNF)-α, interleukin (IL)-6, IL-12, UA, CRE, and UPRO, and decreased level of IL-10 were found in experimental groups than in control groups (P < 0.05). Compared with patients with ES-PE, significantly higher levels of TNF-α, IL-12, IL-6, UA, CRE, and UPRO, and lower level of IL-10 were found in patients with LS-PE. S100A8 plays pivotal roles in the development of preeclampsia through the interactions with other inflammatory factors.

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