Abstract
In Baf-3 cells, IL-3 and IGF-1 both inhibit cell death. These growth factors act at least on two different pathways involved in the inhibition of apoptosis. They both upregulate Bcl-X at the mRNA and protein levels and also activate a pathway which inhibits apoptosis in the absence of protein synthesis. Recently, these two growth factors have been shown to activate the PI3-kinase-AKT pathway which leads to the phosphorylation of the pro-apoptotic Bcl-XL regulator Bad. In this study, we have investigated the role of PI3-kinase in the regulation of Bcl-X expression and in the survival of Baf-3 cells. We show that PI3-kinase activation is involved in the upregulation of Bcl-X mRNA induced by both IL-3 and IGF-1. Moreover, PI3-kinase activity is also necessary for inhibition of apoptosis and caspase regulation by IGF-1 but not IL-3.
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Leverrier, Y., Thomas, J., Mathieu, AL. et al. Role of PI3-kinase in Bcl-X induction and apoptosis inhibition mediated by IL-3 or IGF-1 in Baf-3 cells. Cell Death Differ 6, 290–296 (1999). https://doi.org/10.1038/sj.cdd.4400492
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DOI: https://doi.org/10.1038/sj.cdd.4400492
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