Cellular signaling events elicited by v-abl associated with growth factor independence in an interleukin-3-dependent cell line

P. J. Owen, P. Musk, C. A. Evans, A. D. Whetton

Research output: Contribution to journalArticle

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Abstract

A temperature-sensitive mutant of the v-abl oncoprotein has previously been shown to have markedly reduced tyrosine protein kinase activity in interleukin 3 (IL-3)-dependent cells grown at restrictive (39 °C), compared to permissive (32 °C) temperatures. Transfection of this mutant v-abl into the IC2.9 cell line, generated the IC.DP subclone which was dependent on IL- 3 for survival at 39 °C, but not at 32 °C. Furthermore, IC.DP cells cultured at 32 °C exhibited IL-3-independent thymidine incorporation, which was not apparent at 39 °C. Switching cells from the restrictive to the permissive temperature resulted in an increase in cellular inositol-1,4,5- trisphosphate, choline phosphate and diacylglycerol levels in the IC.DP cell line. These increases were only observed after a lag period of 4 h. Within 2 h of switching IC.DP cells previously maintained at 32 to 39 °C, there was a significant decrease in all three metabolites. Temperature switches had no effect upon these metabolites in the parent IC2.9 cell line. Down-regulation of protein kinase C inhibited v-abl-stimulated DNA synthesis in IC.DP cells cultured at 32 °C IC.DP cells cultured at 32 °C were found to have a constitutively activated Na+/H+ antiport, although this activation was inhibited by the down-modulation of protein kinase C. These data indicate a role for phospholipid hydrolysis and protein kinase C activation in V-ABL- mediated abrogation of IL-3 dependence.

LanguageEnglish
Pages15696-15703
Number of pages8
JournalJournal of Biological Chemistry
Volume268
Issue number21
Publication statusPublished - 25 Jul 1993
Externally publishedYes

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Cell signaling
Interleukin-3
Intercellular Signaling Peptides and Proteins
Cells
Protein Kinase C
Cell Line
Cultured Cells
Temperature
Metabolites
Chemical activation
Inositol 1,4,5-Trisphosphate
Phosphorylcholine
Oncogene Proteins
Diglycerides
Ion Transport
Protein-Tyrosine Kinases
Thymidine
Transfection
Hydrolysis
Phospholipids

Cite this

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title = "Cellular signaling events elicited by v-abl associated with growth factor independence in an interleukin-3-dependent cell line",
abstract = "A temperature-sensitive mutant of the v-abl oncoprotein has previously been shown to have markedly reduced tyrosine protein kinase activity in interleukin 3 (IL-3)-dependent cells grown at restrictive (39 °C), compared to permissive (32 °C) temperatures. Transfection of this mutant v-abl into the IC2.9 cell line, generated the IC.DP subclone which was dependent on IL- 3 for survival at 39 °C, but not at 32 °C. Furthermore, IC.DP cells cultured at 32 °C exhibited IL-3-independent thymidine incorporation, which was not apparent at 39 °C. Switching cells from the restrictive to the permissive temperature resulted in an increase in cellular inositol-1,4,5- trisphosphate, choline phosphate and diacylglycerol levels in the IC.DP cell line. These increases were only observed after a lag period of 4 h. Within 2 h of switching IC.DP cells previously maintained at 32 to 39 °C, there was a significant decrease in all three metabolites. Temperature switches had no effect upon these metabolites in the parent IC2.9 cell line. Down-regulation of protein kinase C inhibited v-abl-stimulated DNA synthesis in IC.DP cells cultured at 32 °C IC.DP cells cultured at 32 °C were found to have a constitutively activated Na+/H+ antiport, although this activation was inhibited by the down-modulation of protein kinase C. These data indicate a role for phospholipid hydrolysis and protein kinase C activation in V-ABL- mediated abrogation of IL-3 dependence.",
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Cellular signaling events elicited by v-abl associated with growth factor independence in an interleukin-3-dependent cell line. / Owen, P. J.; Musk, P.; Evans, C. A.; Whetton, A. D.

In: Journal of Biological Chemistry, Vol. 268, No. 21, 25.07.1993, p. 15696-15703.

Research output: Contribution to journalArticle

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AU - Musk, P.

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