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- W2034802813 abstract "Abstract The growth factor neuregulin 1 (NRG) selectively induces an increase in the γ‐aminobutyric acid (GABA) A receptor β2 subunit protein in rat cerebellar granule neurons in culture. We previously demonstrated that NRG acts by triggering ErbB4 receptor phosphorylation and subsequent signaling through the mitogen‐activated kinase (MAPK), phosphatidyl inositol‐3 kinase (PI‐3K) and cyclin‐dependent kinase 5 (cdk5) pathways. In this report we show that the scaffolding protein, PSD‐95, plays a key role in mediating the effects of NRG and that reducing its level attenuates the NRG‐induced increase in β2 subunit expression. PSD‐95 appears to facilitate the effects of NRG through its association with ErbB4, an interaction that is augmented by NRG‐activated cdk signaling. Inhibition of cdk activity with roscovitine attenuates the association of PSD‐95 with ErbB4. The effects of cdk5 are not blocked by U0126, an inhibitor of MAPK signaling, indicating that cdk5 functions independently of cross‐talk with this pathway. These findings raise the possibility that NRG‐induced activation of cdk5 works in part by recruiting PSD‐95, a protein involved in regulating synaptic plasticity, to associate with ErbB4. This interaction may be a positive feedback loop that augments NRG signaling and its downstream effects on GABA A receptor β2 subunit expression." @default.
- W2034802813 created "2016-06-24" @default.
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- W2034802813 date "2006-08-21" @default.
- W2034802813 modified "2023-10-18" @default.
- W2034802813 title "Association of PSD-95 with ErbB4 facilitates neuregulin signaling in cerebellar granule neurons in culture" @default.
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- W2034802813 doi "https://doi.org/10.1111/j.1471-4159.2006.04182.x" @default.
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