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2015 ; 10
(9
): e0138111
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
The Human Endogenous Protection System against Cell-Free Hemoglobin and Heme Is
Overwhelmed in Preeclampsia and Provides Potential Biomarkers and Clinical
Indicators
#MMPMID26368565
Gram M
; Anderson UD
; Johansson ME
; Edström-Hägerwall A
; Larsson I
; Jälmby M
; Hansson SR
; Åkerström B
PLoS One
2015[]; 10
(9
): e0138111
PMID26368565
show ga
Preeclampsia (PE) complicates 3-8% of all pregnancies and manifests clinically as
hypertension and proteinuria in the second half of gestation. The pathogenesis of
PE is not fully understood but recent studies have described the involvement of
cell-free fetal hemoglobin (HbF). Hypothesizing that PE is associated with
prolonged hemolysis we have studied the response of the cell-free Hb- and heme
defense network. Thus, we have investigated the levels of cell-free HbF (both
free, denoted HbF, and in complex with Hp, denoted Hp-HbF) as well as the major
human endogenous Hb- and heme-scavenging systems: haptoglobin (Hp), hemopexin
(Hpx), ?1-microglobulin (A1M) and CD163 in plasma of PE women (n = 98) and women
with normal pregnancies (n = 47) at term. A significant increase of the mean
plasma HbF concentration was observed in women with PE. Plasma levels of Hp and
Hpx were statistically significantly reduced, whereas the level of the
extravascular heme- and radical scavenger A1M was significantly increased in
plasma of women with PE. The Hpx levels significantly correlated with maternal
blood pressure. Furthermore, HbF and the related scavenger proteins displayed a
potential to be used as clinical biomarkers for more precise diagnosis of PE and
are candidates as predictors of identifying pregnancies with increased risk of
obstetrical complications. The results support that PE pathophysiology is
associated with increased HbF-concentrations and an activation of the
physiological Hb-heme defense systems.