• Grigorios Kalapotharakos, Katja Murtoniemi, Bo Åkerström, Esa Hämäläinen, Eero Kajantie, Katri Räikkönen, Pia Villa, Hannele Laivuori, and Stefan R Hansson.
• Department of Clinical Sciences Lund, Skåne University Hospital, Lund, Sweden.
• Front Physiol. 2019 Jan 1; 10: 300.

AbstractWomen with established preeclampsia (PE) have increased plasma concentration of free fetal hemoglobin. We measured two hemoglobin scavenger system proteins, hemopexin (Hpx) and alpha-1-microglobulin (A1M) in maternal plasma using enzyme-linked immunosorbent assay during the late second trimester of pregnancy in women with high and low risk of developing PE. In total 142 women were included in nested case-control study: 42 women diagnosed with PE and 100 controls (49 randomly selected high-risk and 51 low-risk controls). The concentration of plasma A1M in high-risk controls was higher compared to low-risk controls. Women with severe PE had higher plasma A1M levels compared to women with non-severe PE. In conclusion, the concentration of plasma A1M is increased in the late second trimester in high-risk controls, suggesting activation of endogenous protective system against oxidative stress.

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