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Protein kinase calpha but not p44/42 mitogen-activated protein kinase, p38, or c-Jun NH(2)-terminal kinase is required for intercellular adhesion molecule-1 expression mediated by interleukin-1beta: involvement of sequential activation of tyrosine kinase, nuclear factor-kappaB-inducing kinase, and IkappaB kinase 2



Protein kinase calpha but not p44/42 mitogen-activated protein kinase, p38, or c-Jun NH(2)-terminal kinase is required for intercellular adhesion molecule-1 expression mediated by interleukin-1beta: involvement of sequential activation of tyrosine kinase, nuclear factor-kappaB-inducing kinase, and IkappaB kinase 2



Molecular Pharmacology 58(6): 1479-1489



IL-1beta induced an increase in ICAM-1 expression in human A549 epithelial cells and immunofluorescence staining confirmed this result. Tyrosine kinase inhibitors (genistein or tyrphostin 23) or phosphatidylcholine-specific phospholipase C inhibitor (D609) attenuated IL-1beta-induced ICAM-1 expression. IL-1beta produced an increase in PKC activity and this effect was abolished by D609. PKC inhibitors (staurosporine, Ro 31-8220, calphostin C, or Go 6976) also inhibited IL-1beta-induced response. TPA, a PKC activator, stimulated ICAM-1 expression as well, this effect being inhibited by tyrosine kinase inhibitors. Treatment of cells with IL-1beta resulted in stimulation of p44/42 MAPK, p38, and JNK. However, neither the mitogen activated protein kinase kinase inhibitor PD 98059 nor the p38 inhibitor SB 203580 affected IL-1beta-induced ICAM-1 expression. NF-kappaB DNA-protein binding and ICAM-1 promoter activity were enhanced by IL-1beta and these effects were inhibited by tyrphostin 23, but not by PD 98059 or SB 203580. TPA also stimulated NF-kappaB DNA-protein binding and ICAM-1 promoter activity as well, these effects being inhibited by tyrosine kinase inhibitors. Dominant-negative PKCalpha, NIK, or IKK2, but not IKK1 mutant, inhibited IL-1beta- or TPA-induced ICAM-1 promoter activity. IKK activity was stimulated by either IL-1beta or TPA, and these effects were inhibited by Ro 31-8220 or tyrphostin 23. Taken together, IL-1beta activates phosphatidylcholine-specific phospholipase C and induces activation of PKCalpha and protein tyrosine kinase, resulting in the stimulation of NIK, IKK2, and NF-kappaB in the ICAM-1 promoter, then initiation of ICAM-1 expression. However, activation of p44/42 MAPK, p38, and JNK is not involved.

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Accession: 011218214

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PMID: 11093788


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Protein Kinase C but not p44/42 Mitogen-Activated Protein Kinase, p38, or c-Jun Nh 2 -Terminal Kinase Is Required for Intercellular Adhesion Molecule-1 Expression Mediated by Interleukin-1: Involvement of Sequential Activation of Tyrosine Kinase, Nuclear Factor-B-Inducing Kinase, and IB Kinase 2. Molecular Pharmacology 58(6): 1479-1489, 2000

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