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2018 ; 17
(1
): 49
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Lipoprotein turnover and possible remnant accumulation in preeclampsia: insights
from the Freiburg Preeclampsia H E L P -apheresis study
#MMPMID29540222
Contini C
; Jansen M
; König B
; Markfeld-Erol F
; Kunze M
; Zschiedrich S
; Massing U
; Merfort I
; Prömpeler H
; Pecks U
; Winkler K
; Pütz G
Lipids Health Dis
2018[Mar]; 17
(1
): 49
PMID29540222
show ga
BACKGROUND: Preeclampsia is a life-threatening disease in pregnancy, and its
complex pathomechanisms are poorly understood. In preeclampsia, lipid metabolism
is substantially altered. In late onset preeclampsia, remnant removal disease
like lipoprotein profiles have been observed. Lipid apheresis is currently being
explored as a possible therapeutic approach to prolong preeclamptic pregnancies.
Here, apheresis-induced changes in serum lipid parameters are analyzed in detail
and their implications for preeclamptic lipid metabolism are discussed. METHODS:
In the Freiburg H.E.L.P.-Apheresis Study, 6 early onset preeclamptic patients
underwent repeated apheresis treatments. Serum lipids pre- and post-apheresis and
during lipid rebound were analyzed in depth via ultracentrifugation to yield
lipoprotein subclasses. RESULTS: The net elimination of Apolipoprotein B and
plasma lipids was lower than theoretically expected. Lipids returned to previous
pre-apheresis levels before the next apheresis even though apheresis was repeated
within 2.9?±?1.2 days. Apparent fractional catabolic rates and synthetic rates
were substantially elevated, with fractional catabolic rates for Apolipoprotein B
/ LDL-cholesterol being 0.7?±?0.3 / 0.4?±?0.2 [day(-?1)] and synthetic rates
being 26?±?8 / 17?±?8 [mg*kg(-?1)*day(-?1)]. The distribution of LDL-subclasses
after apheresis shifted to larger buoyant LDL, while intermediate-density
lipoprotein-levels remained unaffected, supporting the notion of an underlying
remnant removal disorder in preeclampsia. CONCLUSION: Lipid metabolism seems to
be highly accelerated in preeclampsia, likely outbalancing remnant removal
mechanisms. Since cholesterol-rich lipoprotein remnants are able to accumulate in
the vessel wall, remnant lipoproteins may contribute to the severe endothelial
dysfunction observed in preeclampsia. TRIAL REGISTRATION: ClinicalTrails.gov,
NCT01967355 .