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- W2017515975 abstract "To assess the ligand binding characteristics of insulin and insulin-like growth factor I receptors in normal and preeclamptic placentas.This study was done cross sectionally in trophoblast membranes obtained from 10 normotensive and 9 preeclamptic pregnant women. The affinity and number of binding sites of insulin and insulin-like growth factor I receptors were assessed by binding assays and Scatchard plot analysis.Placental and newborn birth weights were significantly (P < 0.001) lower in the preeclamptic group. The K(d) values of placental insulin receptors (IR) were significantly higher in the preeclamptic group than in the normotensive group (1.08 +/- 0.24 x 10(-9) vs. 0.81 +/- 0.13 x 10(-9) M, P < 0.01), without differences in the number of receptors. In contrast, no differences were observed in the affinity and the number of insulin-like growth factor I receptors (IGF-1R) between groups. Placental weight was associated negatively with the K(d) values of IR (P < 0.05) and positively with the number of placental IGF-1R (P < 0.05); while newborn birth weight was associated positively with the number of IGF-1R (P < 0.05). In addition, both systolic and diastolic blood pressure correlated significantly with K(d) values of placental IR (P < 0.01).These data demonstrate that preeclampsia is associated with low placental IR affinity. In addition, this study suggests an association between the affinity of IR and number of IGF-1R with placental and/or fetal growth. Furthermore, high blood pressure may affect the affinity of placental IR, but not the affinity or number of placental IGF-1 receptors." @default.
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- W2017515975 date "2005-03-01" @default.
- W2017515975 modified "2023-10-14" @default.
- W2017515975 title "Placental insulin and insulin-like growth factor I receptors in normal and preeclamptic pregnancies" @default.
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- W2017515975 doi "https://doi.org/10.1016/j.clinbiochem.2004.10.013" @default.
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