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- W2000903433 abstract "Interferon-alpha (IFN-alpha) is a pleiotropic cytokine that modulates the cellular functions of both osteoblastic and osteoclastic lineages. It remains unclear whether IFN-alpha regulates the expression of parathyroid hormone (PTH)/PTH-related peptide (PTHrP) receptor, which is a major target molecule regulating skeletal metabolism. In this study, we examined the effect of IFN-alpha on the expression of PTH/PTHrP receptor in human osteoblastic cells (Saos-2). IFN-alpha inhibited the expression of PTH/PTHrP receptor gene in both a time- and dose-dependent manner. The mRNA level was decreased to 61.1% of that of the untreated control by 48 h treatment with 6000 U/mL of IFN-alpha. IFN-alpha also decreased cAMP response to PTH(1-34) in a dose-dependent manner and significantly depressed expression of the receptor protein. However, IFN-alpha did not exert any effect on other osteoblastic markers, such as alkaline phosphatase (ALP) activity, cAMP response to prostaglandin E2 (PGE2), and secretion of bone gla-protein (BGP) and bone sialoprotein (BSP). Finally, IFN-alpha decreased PTH/PTHrP receptor mRNA to 60.7% that of control in the presence of actinomycin D. These data suggest that IFN-alpha downregulates the expression of PTH/PTHrP receptor and its signaling without affecting other osteoblastic markers, and that IFN-alpha regulates its gene expression mainly by decreasing the stability of its mRNA." @default.
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- W2000903433 date "1998-09-01" @default.
- W2000903433 modified "2023-10-14" @default.
- W2000903433 title "Lymphoblastoid interferon-α downregulates parathyroid hormone (PTH)/PTH-related peptide (PTHrP) receptor expression in human osteoblastic cells (Saos-2)" @default.
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- W2000903433 doi "https://doi.org/10.1016/s8756-3282(98)00094-5" @default.
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