Journal
PPAR RESEARCH
Volume 2014, Issue -, Pages -Publisher
HINDAWI LTD
DOI: 10.1155/2014/637251
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Funding
- Research Centre for Women and Infant's Health Biobank Program of the CIHR Group in Development and Fetal Health (CIHR) [MGC-13299]
- Lunenfeld-Tanenbaum Research Institute
- MSH/UHN Department of Obstetrics and Gynecology
- CIHR [64302]
- Rose Torno Chair at Mount Sinai Hospital, Toronto, ON, Canada
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Common pregnancy complications, such as severe preeclampsia and intrauterine growth restriction, disrupt pregnancy progression and impair maternal and fetal wellbeing. Placentas from such pregnancies exhibit lesions principally within the syncytiotrophoblast (SCT), a layer in direct contact with maternal blood. In humans and mice, glial cell missing-1 (GCM-1) promotes differentiation of underlying cytotrophoblast cells into the outer SCT layer. GCM-1 may be regulated by the transcription factor peroxisome proliferator-activated receptor-gamma (PPAR-gamma); in mice, PPAR-gamma promotes labyrinthine trophoblast differentiation via Gcm-1, and, as we previously demonstrated, PPAR-gamma activation ameliorates disease features in rat model of preeclampsia. Here, we aimed to characterize the baseline activity of PPAR-gamma in the human choriocarcinoma BeWo cell line that mimics SCT formation in vitro and modulate PPAR-gamma activity to study its effects on cell proliferation versus differentiation. We report a novel negative autoregulatory mechanism between PPAR-gamma activity and expression and show that blocking PPAR-gamma activity induces cell proliferation at the expense of differentiation, while these remain unaltered following treatment with the agonist rosiglitazone. Gaining a deeper understanding of the role and activity of PPAR-gamma in placental physiology will offer new avenues for the development of secondary prevention and/or treatment options for placentally-mediated pregnancy complications.
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