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p38 MAP kinase is involved in the signalling of sphingosine in osteoblasts: Sphingosine inhibits prostaglandin F-2 alpha-induced phosphoinositide hydrolysis

机译:p38 MAP激酶参与成骨细胞中鞘氨醇的信号转导:鞘氨醇抑制前列腺素F-2α诱导的磷酸肌醇水解

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We previously showed that sphingosine inhibits prostaglandin F-2 alpha (PGF(2 alpha))-stimulated interleukin-6 synthesis in osteoblastlike MC3T3-E1 cells. In the present study, we investigated the effect of sphingosine on phospholipase C-catalyzing phosphoinositide hydrolysis induced by PGF(2 alpha) in these cells. Sphingosine inhibited the inositol phosphates formation by PGF(2 alpha) or NaF, a GTP-binding protein activator. Sphingosine induced the phosphorylation of p38 mitogen-activated protein (MAP) kinase but did not affect the phosphorylation of p42/p44 MAP kinase. SB203580 and PD169316, inhibitors of p38 MAP kinase, rescued the inhibitory effect of sphingosine on the formation of inositol phosphates by PGF(2 alpha) or NaF. These results indicate that sphingosine inhibits PGF(2 alpha)-induced phosphoinositide hydrolysis by phospholipase C via p38 MAP kinase in osteoblasts. (C) 2000 Elsevier Science Inc. All rights reserved. [References: 21]
机译:我们以前显示鞘氨醇在成骨细胞样MC3T3-E1细胞中抑制前列腺素F-2 alpha(PGF(2 alpha))刺激的白细胞介素6合成。在本研究中,我们调查了鞘氨醇对磷脂酶C催化PGF(2 alpha)在这些细胞中诱导的磷酸肌醇水解的影响。鞘氨醇可通过PGF(2 alpha)或GTP结合蛋白激活剂NaF抑制肌醇磷酸酯的形成。鞘氨醇诱导p38丝裂原活化蛋白(MAP)激酶的磷酸化,但不影响p42 / p44 MAP激酶的磷酸化。 SB203580和PD169316是p38 MAP激酶的抑制剂,挽救了鞘氨醇对PGF(2α)或NaF形成肌醇磷酸的抑制作用。这些结果表明鞘氨醇抑制通过成骨细胞中的p38 MAP激酶通过磷脂酶C抑制PGF(2α)诱导的磷酸肌醇水解。 (C)2000 Elsevier Science Inc.保留所有权利。 [参考:21]

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