Heme Oxygenase-1 Is Not Decreased in Preeclamptic Placenta and Does Not Negatively Regulate Placental Soluble fms-Like Tyrosine Kinase-1 or Soluble Endoglin Secretion
Stephen Tong, Tu'uhevaha J Kaitu'u-Lino, Kenji Onda, Sally Beard, Roxanne Hastie, Natalie K Binder, Cathy Cluver, Laura Tuohey, Clare Whitehead, Fiona Brownfoot, Manarangi De Silva, Natalie J Hannan
HYPERTENSION | LIPPINCOTT WILLIAMS & WILKINS | Published : 2015
Elevated placental release of the antiangiogenic factors, soluble fms-like tyrosine kinase-1 (sFlt-1) and soluble endoglin (sENG), is central to the pathophysiology of preeclampsia. It is widely accepted that heme oxygenase-1 (HO-1) is decreased in preeclamptic placenta and negatively regulates sFlt-1 and sENG production. We set out to verify these contentions. There was no difference in HO-1 mRNA or protein levels in preterm preeclamptic placentas (n=17) compared with gestationally matched controls (n=27). In silico analysis of microarray studies did not identify decreased placental HO-1 expression in preeclamptic placenta. Silencing HO-1 in primary trophoblasts did not affect sFlt-1 protei..View full abstract
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Awarded by National Health and Medical Research Council of Australia
This study was funded by grants (no. 1061977 and 1048707) and received salary support (no. 1050765, 1062418, and 628927) from the National Health and Medical Research Council of Australia and by the University of Melbourne Research CR Roper Fellowship (to N.J. Hannan).