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Insulin-like growth factor-1 (IGF-1) induces the activation/phosphorylation of Akt kinase and cAMP response element-binding protein (CREB) by activating different signaling pathways in PC12 cells
Zheng W.-H.2; Quirion R.1
2006-06-22
Source PublicationBMC Neuroscience
ISSN14712202 14712202
Volume7
AbstractBackground: Insulin-like growth factor-I (IGF-1) is a polypeptide growth factor with a variety of functions in both neuronal and non-neuronal cells. IGF-1 plays anti-apoptotic and other functions by activating multiple signaling pathways including Akt kinase, a serine/threonine kinase essential for cell survival. The nuclear transcription factor cAMP response element-binding protein (CREB) may also be involved although relationships between these two proteins in IGF-I receptor signaling and protection is not clear, especially in neuronal cells. Results: IGF-1, in a concentration- and time-dependent manner, induces the activation/phosphorylation of Akt and CREB in PC12 cells by activating different signaling pathways. IGF-1 induced a sustained phosphorylation of Akt while only a transient one was seen for CREB. The phosphorylation of Akt is mediated by the P13 kinase pathway while that of CREB is dependent on the activation of both MAPK kinase and p38 MAPK. Moreover, the stimulation of PKC attenuated the phosphorylation of Akt induced by IGF-1 while enhancing that of CREB. Survival assays with various kinase inhibitors suggested that the activation/phosphorylation of both Akt and CREB contributes to IGF-1 mediated cell survival in PC12 cells. Conclusion: These data suggest that IGF-1 induced the activation of Akt and CREB using distinct pathways in PC12 cells. © 2006 Zheng and Quirion; licensee BioMed Central Ltd.
DOI10.1186/1471-2202-7-51
URLView the original
Language英語
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Cited Times [WOS]:57   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Affiliation1.Douglas Hospital Research Center
2.Sun Yat-Sen University
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GB/T 7714
Zheng W.-H.,Quirion R.. Insulin-like growth factor-1 (IGF-1) induces the activation/phosphorylation of Akt kinase and cAMP response element-binding protein (CREB) by activating different signaling pathways in PC12 cells[J]. BMC Neuroscience,2006,7.
APA Zheng W.-H.,&Quirion R..(2006).Insulin-like growth factor-1 (IGF-1) induces the activation/phosphorylation of Akt kinase and cAMP response element-binding protein (CREB) by activating different signaling pathways in PC12 cells.BMC Neuroscience,7.
MLA Zheng W.-H.,et al."Insulin-like growth factor-1 (IGF-1) induces the activation/phosphorylation of Akt kinase and cAMP response element-binding protein (CREB) by activating different signaling pathways in PC12 cells".BMC Neuroscience 7(2006).
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