OxLDL induces endothelial dysfunction and death via TRAF3IP2: inhibition by HDL3 and AMPK activators.
OxLDL induces endothelial dysfunction and death via TRAF3IP2: inhibition by HDL3 and AMPK activators.
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OXLDL通过TRAF3IP2诱导内皮功能障碍和死亡:HDL3和AMPK激活剂的抑制作用。
DOI:
10.1016/j.freeradbiomed.2014.02.014
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发表时间:
2014-05
影响因子:
7.4
通讯作者:
Chandrasekar, Bysani
中科院分区:
文献类型:
--
作者:
Valente, Anthony J.;Irimpen, Anand M.;Siebenlist, Ulrich;Chandrasekar, Bysani
Oxidized low-density lipoprotein (OxLDL) induces endothelial cell death through the activation of NF-κB and AP-1 pathways. TRAF3IP2 is a redox-sensitive cytoplasmic adapter protein and an upstream regulator of IKK/NF-κB and JNK/AP-1. Here we show that OxLDL-induced death in human primary coronary artery endothelial cells (EC) was markedly attenuated by the knockdown of TRAF3IP2 or the lectin-like OxLDL receptor 1 (LOX-1). Further, OxLDL induced Nox2/superoxide-dependent TRAF3IP2 expression, IKK/p65 and JNK/c-Jun activation and LOX-1 upregulation, suggesting a reinforcing mechanism. Similarly, the lysolipids present in oxLDL (16:0-LPC and 18:0-LPC) and minimally modified LDL also upregulated TRAF3IP2 expression. Notably, while native HDL3 reversed OxLDL-induced TRAF3IP2 expression and cell death, 15-lipoxygenase-modified HDL3 potentiated its pro-apoptotic effects. The activators of the AMPK/Akt pathway, adiponectin, AICAR and metformin attenuated superoxide generation, TRAF3IP2 expression, and OxLDL/TRAF3IP2-mediated EC death. Further, both HDL3 and adiponectin reversed OxLDL/TRAF3IP2-dependent monocyte adhesion to endothelial cells in vitro. Importantly, TRAF3IP2 gene deletion and the AMPK activators reversed OxLDL-induced impaired vasorelaxation ex-vivo. These results indicate that OxLDL-induced endothelial cell death and dysfunction are mediated via TRAF3IP2, and that native HDL3 and the AMPK activators inhibit this response. Targeting TRAF3IP2 could potentially inhibit progression of atherosclerotic vascular diseases.
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影响因子:
4.4
作者:
Claudio, Estefania;Sonder, Soren Ulrik;Saret, Sun;Carvalho, Gabrielle;Ramalingam, Thirumalai R.;Wynn, Thomas A.;Chariot, Alain;Garcia-Perganeda, Antonio;Leonardi, Antonio;Paun, Andrea;Chen, Amy;Ren, Nina Y.;Wang, Hongshan;Siebenlist, Ulrich
通讯作者:
Siebenlist, Ulrich
DOI:
10.1073/pnas.160265197
发表时间:
2000-09-12
影响因子:
11.1
作者:
Li, XX;Commane, M;Stark, GR
通讯作者:
Stark, GR
影响因子:
64.8
作者:
KUGIYAMA, K;KERNS, SA;HENRY, PD
通讯作者:
HENRY, PD
影响因子:
15.9
作者:
FOLCIK, VA;NIVARARISTY, RA;CATHCART, MK
通讯作者:
CATHCART, MK
影响因子:
4.8
作者:
Chandrasekar, Bysani;Boylston, William H.;Valente, Anthony J.
通讯作者:
Valente, Anthony J.