Abstract：
:Hyperglycemia-induced endothelial dysfunction is characterized by enhanced inflammatory cytokine and adhesion molecule expression, and endothelial-monocyte adhesion. The adapter molecule CIKS (connection to IKK and SAPK/JNK; also known as Act1 or TRAF3IP2) is an upstream regulator of NF-κB and AP-1, and plays a role in inflammation and injury. Here we show that high glucose (HG; 25mM vs. 5mM d-glucose)-induced endothelial-monocyte adhesion and inhibition of endothelial cell (EC) migration were both reversed by CIKS knockdown. In EC, HG induced CIKS mRNA and protein expression via DPI-inhibitable Nox4-dependent ROS generation. Further, HG induced CIKS transcription and enhanced CIKS promoter-dependent reporter gene activation via Nox4, ROS, AP-1 and C/EBP. Coimmunoprecipitation and immunoblotting revealed CIKS/IKKβ/JNK physical association under basal conditions that was enhanced by HG treatment. Importantly, CIKS knockdown inhibited HG-induced (i) IKKβ and JNK phosphorylation, (ii) p65 and c-Jun nuclear translocation, and (iii) NF-κB- and AP-1-dependent proinflammatory cytokine, chemokine, and adhesion molecule expression. Similar to HG, the deleterious metabolic products of chronic hyperglycemia, AGE-HSA, AOPPs-HSA and oxLDL, also induced CIKS-dependent endothelial dysfunction. Notably, aortas from streptozotocin-induced and the autoimmune type 1 diabetic NOD and Akita mice showed enhanced DPI-inhibitable ROS generation and CIKS expression. Since CIKS mediates high glucose-induced NF-κB and AP-1-dependent inflammatory signaling and endothelial dysfunction, targeting CIKS may delay progression of vascular diseases during diabetes mellitus and atherosclerosis.
journal_name
Cell Signaljournal_title
Cellular signallingauthors
Venkatesan B,Valente AJ,Das NA,Carpenter AJ,Yoshida T,Delafontaine JL,Siebenlist U,Chandrasekar Bdoi
10.1016/j.cellsig.2012.10.009subject
Has Abstractpub_date
2013-01-01 00:00:00pages
359-71issue
1eissn
0898-6568issn
1873-3913pii
S0898-6568(12)00289-6journal_volume
25pub_type
杂志文章abstract：:Cortical and medullary thymocytes can be separated from each other by virtue of the fact that only cortical thymocytes bear peanut agglutinin (PNA) receptors. The mitogenic responses of subpopulations of thymocytes were studied. We have confirmed the results of Conlon et al. [(1982) J. Immun. 128, 797-801], that lecti...
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更新日期：2015-02-01 00:00:00
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更新日期：2014-03-01 00:00:00
