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© Charles Dauguet
Virus VIH-1 (HIV-1), agent du sida, à la surface d'un lymphocyte. Image colorisée.
Publication : Journal of neurochemistry

Promyelocytic leukemia-nuclear body formation is an early event leading to retinoic acid-induced differentiation of neuroblastoma cells

Team: Group: MISTIC
Member: Fahd Benjelloun
Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Journal of neurochemistry - 06 Nov 2007

Delaune A, Corbière C, Benjelloun FD, Legrand E, Vannier JP, Ripoll C, Vasse M

Link to Pubmed [PMID] – 17986232

J. Neurochem. 2008 Jan;104(1):89-99

Neuroblastoma is one of the most common cancers in children. Neuroblastoma differentiation is linked to the presence of the promyelocytic leukemia (PML) protein. Retinoic acid, a powerful differentiation-inducer in vitro, is a potent agent for the treatment of neuroblastoma. Using two different human neuroblastoma cell lines, SH-SY5Y and LA-N-5, we show here that PML protein leads to the formation of nuclear bodies (PML-NB) after only 1 h of retinoic acid treatment and that this formation is mediated by the extracellular signal-regulated kinase (ERK) pathway. Inhibition of protein kinase C also leads to formation of PML-NB via the ERK pathway. Both sumoylation and phosphorylation of PML in an ERK-dependent pathway are also required for formation of PML-NB. Finally, we show that PML-NB formation in neuroblastoma cells is associated with neurite outgrowth. These results support the proposal that the formation of PML-NB is correlated with the differentiation of neuroblastoma cells.

http://www.ncbi.nlm.nih.gov/pubmed/17986232