title: Inhibition of lectin-like oxidized low-density lipoprotein receptor 1 protects against plasma/hypoxia-mediated trophoblast dysfunction associated with preeclampsia.
abstract: BACKGROUND
  Preeclampsia (PE) is associated with oxidative stress in the maternal circulation and placenta. This study aimed to determine if inhibition of lectin-like oxidized low-density lipoprotein receptor 1 (LOX-1) gives protection against oxidative stress-mediated trophoblast dysfunction.
  
  
  METHODS
  Plasma and placenta samples were obtained from 106 women with PE and 106 women with normal pregnancy (NP). Oxidized low-density lipoprotein (oxLDL) and soluble LOX-1 levels were determined by enzyme-linked immunoassay. Placental LOX-1 expression was determined by western blotting. Trophoblasts were subjected to hypoxia and treated with pooled plasma from patients with PE. Expression levels of placenta growth factor (PIGF) and the soluble form of the PIGF receptor (sFlt-1) in trophoblasts were determined.
  
  
  RESULTS
  Plasma concentrations of oxLDL and sLOX-1 were significantly over-expressed and LOX-1 protein expression in the placenta was significantly increased in PE patients compared with matched NP controls (both p < 0.05). Exposure of trophoblasts to hypoxia and pooled PE plasma induced overexpression of sFlt-1 and downregulation of PIGF. These effects were inhibited by the LOX-1 inhibitor TS20.
  
  
  CONCLUSIONS
  LOX-1 accumulation may contribute to the pathogenesis of PE by promoting sFlt-1 production in trophoblasts, suggesting that oxidative stress may be an important mediator regulating angiogenic pathways in trophoblasts.
authors: Obstetrical Department, The Affiliated Hospital of Medical College, Qingdao University, Qingdao, PR China.
authors: Yan
authors: Y
authors: Zhang
authors: Yuanhua
authors: Y
authors: Ye
authors: Yufang
authors: Y
authors: Wang
authors: Weiping
authors: W
authors: Chen
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D008077:Lipoproteins, LDL / Q000097:blood / Q000378:metabolism*; D018384:Oxidative Stress / Q000502:physiology*; D010920:Placenta / Q000378:metabolism*; D000072483:Placenta Growth Factor; D011225:Pre-Eclampsia / Q000097:blood / Q000378:metabolism*; D011247:Pregnancy; D011257:Pregnancy Proteins / Q000187:drug effects / Q000378:metabolism*; D051127:Scavenger Receptors, Class E / Q000037:antagonists & inhibitors / Q000097:blood / Q000378:metabolism*; D014327:Trophoblasts / Q000378:metabolism / Q000473:pathology; D040281:Vascular Endothelial Growth Factor Receptor-1 / Q000187:drug effects / Q000378:metabolism*
chemical_list: D008077:Lipoproteins, LDL; C495137:OLR1 protein, human; C000608036:PGF protein, human; D011257:Pregnancy Proteins; D051127:Scavenger Receptors, Class E; C099252:oxidized low density lipoprotein; D000072483:Placenta Growth Factor; C501162:FLT1 protein, human; D040281:Vascular Endothelial Growth Factor Receptor-1