The cytotrophoblast (CTB) cells of the human placenta have membrane receptors that bind certain cardiotonic steroids (CTS) found in blood plasma. One of these, marinobufagenin, is a key factor in the etiology of preeclampsia. Herein, we used synthetic receptors (SR) to study their effectiveness on the angiogenic profile of human first trimester CTB cells. The humanextravillous CTB cells (Sw.71) used in this study were derived from first trimester chorionic villus tissue. Culture media of CTB cells treated with ≥1 nM SR level revealed sFlt-1 (Soluble fms-like tyrosine kinase-1) was significantly increased while VEGF (vascular endothelial growth factor) was significantly decreased in the culture media (* p < 0.05 for each) The AT2 receptor (Angiotensin II receptor type 2) expression was significantly upregulated in ≥1 nM SR-treated CTB cells as compared to basal; however, the AT1 (Angiotensin II receptor, type 1) and VEGFR-1 (vascular endothelial growth factor receptor 1) receptor expression was significantly downregulated (* p < 0.05 for each). Our results show that the anti-proliferative and anti-angiogenic effects of SR on CTB cells are similar to the effects of CTS. The observed anti angiogenic activity of SR on CTB cells demonstrates that the functionalized-urea/thiourea molecules may be useful as potent inhibitors to prevent CTS-induced impairment of CTB cells.
人类胎盘的细胞滋养层细胞(CTB)具有膜受体,这些受体能结合血浆中发现的某些强心类
固醇(C
TS)。其中一种称为
金线蛙
甾醇,是子痫前期发病机制中的关键因素。本文中,我们利用合成受体(SR)来研究它们对人类孕早期CTB细胞的血管生成特征的有效性。本研究所用的外滋养层人类CTB细胞(Sw.71)源自孕早期的绒毛组织。经≥1 nM SR
水平处理的CTB
细胞培养基显示出可溶性
酪氨酸激酶受体Fms样1(sFlt-1)显著增加,而血管内皮生长因子(V
EGF)显著减少(* p < 0.05)。与基础水平相比,≥1 nM SR处理的CTB细胞中,血管紧张素II受体2型(AT2)表达显著上调;而血管紧张素II受体1型(AT1)和血管内皮生长因子受体1(VEGFR-1)的表达则显著下调(* p < 0.05)。我们的结果表明,SR对CTB细胞的抗增殖和抗血管生成作用与CTS的作用相似。SR在CTB细胞上展现的抗血管生成活性表明,功能化的脲/硫脲分子可能作为强效抑制剂,用以预防C
TS诱导的CTB细胞功能障碍。