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Nuclear factor‐κB/p65 responds to changes in the Notch signaling pathway in murine BV‐2 cells and in amoeboid microglia in postnatal rats treated with the γ‐secretase complex blocker DAPT by Q. Cao; P. Li; J. Lu; S.T. Dheen; C. Kaur; E.‐A. Ling is a Neuroscience article available to read on EtoBox.

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## Abstract Microglial cells constitutively express Notch‐1 and nuclear factor‐κB/p65 (NF‐κB/p65), and both pathways modulate production of inflammatory mediators. This study sought to determine whether a functional relationship exists between them and, if so, to investigate whether they synergistically regulate common microglial cell functions. By immunofluorescence labeling, real‐time polymerase chain reaction (RT‐PCR), flow cytometry, and Western blot, BV‐2 cells exhibited Notch‐1 and NF‐κB/p65 expression, which was significantly up‐regulated in cells challenged with lipopolysaccharide (LPS). This was coupled with an increase in expression of Hes‐1, tumor necrosis factor‐α (TNF‐α), and interleukin‐1β (IL‐1β). In BV‐2 cells pretreated with N‐[N‐(3,5‐difluorophenacetyl)‐1‐alany1]‐S‐phenyglycine __t__‐butyl ester (DAPT), a γ‐secretase inhibitor, followed by LPS stimulation, Notch‐1 expression level was enhanced but that of all other markers was suppressed. Additionally, Hes‐1 expression and NF‐κB nuclear translocation decreased as shown by flow cytometry. Notch‐1's modulation of NF‐κB/p65 was also evidenced in amoeboid microglial cells (AMC) in vivo. In 5‐day‐old rats given intrape

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Author

Q. Cao; P. Li; J. Lu; S.T. Dheen; C. Kaur; E.‐A. Ling

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0360-4012)

Published

2010

Language

EN

Field

Neuroscience (Life Sciences)