Sphingosine 1-phosphate and platelet-derived growth factor (PDGF) act via PDGF beta receptor-sphingosine 1-phosphate receptor complexes in airway smooth muscle cells

Catherine Waters, Balwinder Sambi, Kok-Choi Kong, Dawn Thompson, Stuart M Pitson, Susan Pyne, Nigel J Pyne

Research output: Contribution to journalArticle

119 Citations (Scopus)

Abstract

Platelet-derived growth factor (PDGF) and sphingosine 1-phosphate (S1P) act via PDGF beta receptor-S1P(1) receptor complexes in airway smooth muscle cells to promote mitogenic signaling. Several lines of evidence support this conclusion. First, both receptors were co-immunoprecipitated from cell lysates with specific anti-S1P(1) antibodies, indicating that they form a complex. Second, treatment of airway smooth muscle cells with PDGF stimulated the phosphorylation of p42/p44 MAPK, and this phosphorylated p42/p44 MAPK associates with the PDGF beta receptor-S1P(1) receptor complex. Third, treatment of cells with antisense S1P(1) receptor plasmid construct reduced the PDGF- and S1P-dependent activation of p42/p44 MAPK. Fourth, S1P and/or PDGF induced the formation of endocytic vesicles containing both PDGF beta receptors and S1P(1) receptors, which was required for activation of the p42/p44 MAPK pathway. PDGF does not induce the release of S1P, suggesting the absence of a sequential mechanism. However, sphingosine kinase 1 is constitutively exported from cells and supports activation of p42/p44 MAPK by exogenous sphingosine. Thus, the presentation of sphingosine from other cell types and its conversion to S1P by the kinase exported from airway smooth muscle cells might enable S1P to act with PDGF on the PDGF beta receptor-S1P(1) receptor complex to induce biological responses in vivo. These data provide further evidence for a novel mechanism for G-protein-coupled receptor and receptor tyrosine kinase signal integration that is distinct from the transactivation of receptor tyrosine kinases by G-protein-coupled receptor agonists and/or sequential release and action of S1P in response to PDGF.

Original languageEnglish
Pages (from-to)6282-90
Number of pages9
JournalThe Journal of Biological Chemistry
Volume278
Issue number8
DOIs
Publication statusPublished - 21 Feb 2003

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Lysosphingolipid Receptors
Platelet-Derived Growth Factor beta Receptor
Platelet-Derived Growth Factor
Smooth Muscle Myocytes
Muscle
Mitogen-Activated Protein Kinase 3
Cells
Mitogen-Activated Protein Kinase 1
Sphingosine
Receptor Protein-Tyrosine Kinases
G-Protein-Coupled Receptors
Chemical activation
Transport Vesicles
sphingosine 1-phosphate
Transcriptional Activation
G-Protein-Coupled Receptor Kinases
Plasmids
Phosphotransferases
Phosphorylation
Antibodies

Keywords

  • Animals
  • Cells, Cultured
  • Guinea Pigs
  • Kinetics
  • Lysophospholipids
  • MAP Kinase Signaling System
  • Mitogen-Activated Protein Kinases
  • Muscle, Smooth
  • Receptor, Platelet-Derived Growth Factor beta
  • Receptors, Cell Surface
  • Receptors, G-Protein-Coupled
  • Receptors, Lysophospholipid
  • Recombinant Proteins
  • Respiratory Physiological Phenomena
  • Sphingosine
  • Transfection

Cite this

Sphingosine 1-phosphate and platelet-derived growth factor (PDGF) act via PDGF beta receptor-sphingosine 1-phosphate receptor complexes in airway smooth muscle cells. / Waters, Catherine; Sambi, Balwinder; Kong, Kok-Choi; Thompson, Dawn; Pitson, Stuart M; Pyne, Susan; Pyne, Nigel J.

In: The Journal of Biological Chemistry, Vol. 278, No. 8, 21.02.2003, p. 6282-90.

Research output: Contribution to journalArticle

Waters, Catherine ; Sambi, Balwinder ; Kong, Kok-Choi ; Thompson, Dawn ; Pitson, Stuart M ; Pyne, Susan ; Pyne, Nigel J. / Sphingosine 1-phosphate and platelet-derived growth factor (PDGF) act via PDGF beta receptor-sphingosine 1-phosphate receptor complexes in airway smooth muscle cells. In: The Journal of Biological Chemistry. 2003 ; Vol. 278, No. 8. pp. 6282-90.
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abstract = "Platelet-derived growth factor (PDGF) and sphingosine 1-phosphate (S1P) act via PDGF beta receptor-S1P(1) receptor complexes in airway smooth muscle cells to promote mitogenic signaling. Several lines of evidence support this conclusion. First, both receptors were co-immunoprecipitated from cell lysates with specific anti-S1P(1) antibodies, indicating that they form a complex. Second, treatment of airway smooth muscle cells with PDGF stimulated the phosphorylation of p42/p44 MAPK, and this phosphorylated p42/p44 MAPK associates with the PDGF beta receptor-S1P(1) receptor complex. Third, treatment of cells with antisense S1P(1) receptor plasmid construct reduced the PDGF- and S1P-dependent activation of p42/p44 MAPK. Fourth, S1P and/or PDGF induced the formation of endocytic vesicles containing both PDGF beta receptors and S1P(1) receptors, which was required for activation of the p42/p44 MAPK pathway. PDGF does not induce the release of S1P, suggesting the absence of a sequential mechanism. However, sphingosine kinase 1 is constitutively exported from cells and supports activation of p42/p44 MAPK by exogenous sphingosine. Thus, the presentation of sphingosine from other cell types and its conversion to S1P by the kinase exported from airway smooth muscle cells might enable S1P to act with PDGF on the PDGF beta receptor-S1P(1) receptor complex to induce biological responses in vivo. These data provide further evidence for a novel mechanism for G-protein-coupled receptor and receptor tyrosine kinase signal integration that is distinct from the transactivation of receptor tyrosine kinases by G-protein-coupled receptor agonists and/or sequential release and action of S1P in response to PDGF.",
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AB - Platelet-derived growth factor (PDGF) and sphingosine 1-phosphate (S1P) act via PDGF beta receptor-S1P(1) receptor complexes in airway smooth muscle cells to promote mitogenic signaling. Several lines of evidence support this conclusion. First, both receptors were co-immunoprecipitated from cell lysates with specific anti-S1P(1) antibodies, indicating that they form a complex. Second, treatment of airway smooth muscle cells with PDGF stimulated the phosphorylation of p42/p44 MAPK, and this phosphorylated p42/p44 MAPK associates with the PDGF beta receptor-S1P(1) receptor complex. Third, treatment of cells with antisense S1P(1) receptor plasmid construct reduced the PDGF- and S1P-dependent activation of p42/p44 MAPK. Fourth, S1P and/or PDGF induced the formation of endocytic vesicles containing both PDGF beta receptors and S1P(1) receptors, which was required for activation of the p42/p44 MAPK pathway. PDGF does not induce the release of S1P, suggesting the absence of a sequential mechanism. However, sphingosine kinase 1 is constitutively exported from cells and supports activation of p42/p44 MAPK by exogenous sphingosine. Thus, the presentation of sphingosine from other cell types and its conversion to S1P by the kinase exported from airway smooth muscle cells might enable S1P to act with PDGF on the PDGF beta receptor-S1P(1) receptor complex to induce biological responses in vivo. These data provide further evidence for a novel mechanism for G-protein-coupled receptor and receptor tyrosine kinase signal integration that is distinct from the transactivation of receptor tyrosine kinases by G-protein-coupled receptor agonists and/or sequential release and action of S1P in response to PDGF.

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KW - Transfection

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