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Activation of sphin...
Activation of sphingosine kinase by the bradykinin B2 receptor and its implication in regulation of the ERK/MAP kinase pathway.
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Blaukat, Andree (författare)
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- Dikic, Ivan (författare)
- Ludwiginstitutet för Cancerforskning
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(creator_code:org_t)
- 2001
- 2001
- Engelska.
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Ingår i: Biol Chem. - 1431-6730. ; 382:1, s. 135-9
- Relaterad länk:
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http://www.ncbi.nlm....
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- Sphingosine kinase phosphorylates sphingosine to generate sphingosine 1-phosphate, a phospholipid that has been implicated in signaling by a number of transmembrane receptors and was recently shown to act as a ligand for a specific class of G protein-coupled receptors. Here we show that the G protein-coupled bradykinin B2 receptor activates sphingosine kinase leading to a time- and dose-dependent elevation of cellular sphingosine 1-phosphate levels that was blocked by the sphingosine kinase inhibitor dihydrosphingosine. Furthermore, increasing doses of this inhibitor partially affected the bradykinin-mediated ERK/MAP kinase activation and fully blocked the protein kinase C-independent component of the signaling pathway from the B2 receptor to the ERK/MAP kinase cascade. Overexpression of sphingosine kinase did not additionally increase the bradykinin-induced ERK/MAP kinase activity, indicating a permissive rather than activating role of sphingosine 1-phosphate in B2 receptor-mediated mitogenic signaling.
Nyckelord
- Enzyme Activation/physiology
- Enzyme Inhibitors/pharmacology
- Gene Expression Regulation; Enzymologic/genetics
- Humans
- Lysophospholipids
- Mitogen-Activated Protein Kinases/biosynthesis/genetics/*metabolism
- Phosphotransferases (Alcohol Group Acceptor)/antagonists & inhibitors/*metabolism
- Receptor; Bradykinin B2
- Receptors; Bradykinin/*physiology
- Research Support; Non-U.S. Gov't
- Signal Transduction/drug effects/physiology
- Sphingosine/*analogs & derivatives/biosynthesis/pharmacology
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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