Mu-Opioid Receptor-Mediated Phosphorylation of IκB Kinase in Human Neuroblastoma SH-SY5Y Cells
Author(s) -
Andrew M.F. Liu,
Yung Hou Wong
Publication year - 2005
Publication title -
neurosignals
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.755
H-Index - 67
eISSN - 1424-8638
pISSN - 1424-862X
DOI - 10.1159/000086296
Subject(s) - iκb kinase , tank binding kinase 1 , microbiology and biotechnology , kinase , chemistry , sgk1 , map kinase kinase kinase , signal transduction , cyclin dependent kinase 9 , mitogen activated protein kinase kinase , biology , cancer research , protein kinase c , nf κb
Opioid receptors are involved in regulating neuronal survival. Here we demonstrate that activation of the mu-opioid receptor in human neuroblastoma SH-SY5Y cells led to the phosphorylations of IkappaB kinase (IKK) and p65, denoting the stimulation of the nuclear factor-kappaB (NFkappaB) transcription factor. This response was mediated through pertussis toxin-sensitive G proteins. The mu-opioid-induced IKK phosphorylation required extracellular signal-regulated protein kinase, phosphatidylinositol 3-kinase and c-Src. Moreover, c-Jun N-terminal kinase and calmodulin-dependent kinase II also participated in the IKK activation, despite the lack of involvement of phospholipase Cbeta and protein kinase C. These data suggest that the mu-opioid receptor is capable of simulating NFkappaB signaling via the phosphorylation of IKK and p65 in human neuroblastoma SH-SY5Y cells.
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