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We have previously reported that the intact PTH molecule (1–84) stimulates proliferation of human umbilical vein endothelial cells (HUVECs). To define the bioactive portion of the PTH molecule we utilized amino, mid and carboxy-terminal PTH fragments. Carboxy- but not amino-terminal fragments were equivalent to the intact PTH molecule in stimulating [ 3 H]thymidine incorporation in HUVEC....
We have previously reported that parathyroid hormone (PTH) has specific effects on a human umbilical vein endothelial cell line. Further studies were performed to characterize the signaling cascades initiated by PTH. We report that PTH induced the appearance of voltage sensitive calcium channels. Furthermore, PTH increased ceramide but not diacylglycerol content. Since elevations in [Ca 2 ...
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