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Targeted metabolomic analysis of early-trimester serum identifies potential mechanisms for late-onset preeclampsia.

OBJECTIVE: Preeclampsia (PE) is a pregnancy-specific hypertensive disorder. Late-onset (Lo)-PE can cause serious complications in both the mother and child. This study aimed to explore biomarkers for elucidating the mechanisms underlying Lo-PE, via a metabolomic analysis of first-trimester maternal serum.

METHODS: This study was conducted at Fukushima Regional Center as an adjunct to Japan Environment and Children Study and included 12 patients with Lo-PE matched to 12 women with healthy pregnancies. Capillary electrophoresis-mass spectrometry-based quantitative analyses of charged metabolites were performed on first-trimester maternal serum samples.

RESULTS: Overall, 183 charged metabolites were identified. The peak area of glucosamine was significantly higher for the first-trimester sera of patients with Lo-PE than that for controls. Conversely, the peak area of serotonin was significantly decreased in the sera of patients with Lo-PE.

CONCLUSIONS: During early pregnancy, glucosamine and serotonin levels in maternal serum may serve as early biomarkers for Lo-PE. As part of preconception care, pre-pregnancy dietary habits and mental health could potentially prevent Lo-PE onset.

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