The Expression of Death Domain Receptor-3, Caspase-10, Insulin-Like Growth Factor Binding Protein-3 in the Placentas of Preeclampsia / 대한주산의학회잡지

OBJECTIVE: To determine that preeclampsia is associated with differential expression of death domain receptor-3(DDR-3), caspase-10, and insulin-like growth factor binding protein-3(IGFBP-3). METHODS: Placenta were collected from 10 preeclampsias and from 15 normal pregnancies and the samples were immediately frozen and stored at -70degrees C. Total mRNA was extracted from placental tissue and then analysis of the expressions of DDR-3, caspase-10, and IGFBP-3 were performed by quantitative RT-PCR. RESULTS: Quantitative RT-PCR analysis demonstrated significantly increased DDR-3 and caspase-10 expression levels and significantly decreased IGFBP-3 expression level in the placenta of preeclampsia compared with normal pregnancy. CONCLUSION: Placental apoptosis is associated with DDR-3, caspase-10, and IGFBP-3. These results may be one of possible mechanisms in the placental apoptosis of preeclampsia.

Placental apoptosis in preeclampsia / 대한산부인과학회잡지

OBJECTIVE: Our purpose was to investigate the incidence of placental apoptosis in pregnancies complicated by preeclampsia. METHODS: Placental samples were obtained from 15 uncomplicated third-trimester pregnancies and from 17 pregnancies complicated by preeclampsia. TUNEL (terminal deoxynucleotidyl transferase-mediated deoxyuridine triphosphate nick end labeling) staining and electron microscopy were performed on all placental samples and identified apoptosis within the cells of the placenta. TUNEL positive stained cells were counted at each photograph(five sections were photoragphed at 1,500 magnifications for each sample). We focused on only the syncytiotrophoblast nuclei of the placenta. The number of apoptotic syncytiotrophoblast nuclei identified was expressed as a percentage of total number of syncytiotrophoblast nuclei counted. RESULTS: Quantification of apoptosis (mean+/-SD) was as follows: normal third trimester (n=15) 0.57+/- 0.47% of cells and preeclampsia third trimester (n=17) 1.41+/-0.67% of cells. The incidence of apoptosis was significantly increased in placentas from pregnancies with preeclampsia compared with normal placentas (p< 0.01). CONCLUSION: These results suggest that placental apoptosis may play a role in the pathophysiologic mechanisms of preeclampsia.