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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Differential regulation of interleukin 5-stimulated signaling pathways by dynamin.

Through the yeast two-hybrid screen we have identified dynamin-2 as a molecule that interacts with the alpha subunit of the interleukin (IL) 5 receptor. Dynamin-2 is a GTPase that is critical for endocytosis. We have shown that dynamin-2 interacts with the IL-5 receptor-associated tyrosine kinases, Lyn and JAK2, in eosinophils. Tyrosine phosphorylation of dynamin is markedly enhanced upon IL-5 stimulation. The inhibition of tyrosine kinases results in complete abolition of ligand-induced receptor endocytosis. Inhibition of dynamin by a dominant-negative mutant or by small interfering RNA results in enhancement of IL-5- stimulated ERK1/2 signaling and cell proliferation. In contrast, the absence of a functional dynamin does not affect STAT5 or AKT phosphorylation or cell survival. Thus, we have identified specific functions for dynamin in the IL-5 signaling pathway and demonstrated its role in receptor endocytosis and termination of the ERK1/2 signaling pathway.[1]


  1. Differential regulation of interleukin 5-stimulated signaling pathways by dynamin. Gorska, M.M., Cen, O., Liang, Q., Stafford, S.J., Alam, R. J. Biol. Chem. (2006) [Pubmed]
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