Abstract:
:Posttranslational protein modifications (PTMs) are necessary for cells to function properly. The role of PTMs in regulating immune responses, specifically those mediated by dendritic cells (DCs), which are critical for both innate and adaptive immunity, is not well understood. Utilizing multiple but complementary approaches, we determined the role of an important but less understood type of PTM, namely, neddylation, in regulating DC functions. Inhibition of neddylation suppressed the release of proinflammatory cytokines by DCs in response to Toll-like receptor, nucleotide oligomerization domain-like receptor, and noninfectious CD40L stimulation. These effects were more profound than those mediated by the proteasome inhibitor bortezomib or a commonly used antiinflammatory agent, dexamethasone. Targeting neddylation also suppressed the ability of DCs to stimulate murine allogeneic T cells in vitro and in vivo and human allogeneic T-cell responses in vitro. Mechanistic studies demonstrated that inhibition of neddylation reduced both canonical and noncanonical nuclear factor-κB (NF-κB) activity. Neddylation inhibition prevented the degradation of inhibitor-κB and thus reduced the translocation and activation of NF-κB, but without perturbation of the mitogen-activated protein kinase/extracellular signal-regulated kinase pathway. Thus, blocking neddylation could be a novel strategy for mitigating immune-mediated disease processes.
journal_name
Bloodjournal_title
Bloodauthors
Mathewson N,Toubai T,Kapeles S,Sun Y,Oravecz-Wilson K,Tamaki H,Wang Y,Hou G,Sun Y,Reddy Pdoi
10.1182/blood-2013-02-486373subject
Has Abstractpub_date
2013-09-19 00:00:00pages
2062-73issue
12eissn
0006-4971issn
1528-0020pii
blood-2013-02-486373journal_volume
122pub_type
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