Up-regulation of NADPH oxidase-mediated redox signaling contributes to the loss of barrier function in KRIT1 deficient endothelium.
Up-regulation of NADPH oxidase-mediated redox signaling contributes to the loss of barrier function in KRIT1 deficient endothelium.
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DOI:
10.1038/s41598-017-08373-4
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发表时间:
2017-08-15
影响因子:
4.6
通讯作者:
Glading AJ
中科院分区:
文献类型:
--
作者:
Goitre L;DiStefano PV;Moglia A;Nobiletti N;Baldini E;Trabalzini L;Keubel J;Trapani E;Shuvaev VV;Muzykantov VR;Sarelius IH;Retta SF;Glading AJ
The intracellular scaffold KRIT1/CCM1 is an established regulator of vascular barrier function. Loss of KRIT1 leads to decreased microvessel barrier function and to the development of the vascular disorder Cerebral Cavernous Malformation (CCM). However, how loss of KRIT1 causes the subsequent deficit in barrier function remains undefined. Previous studies have shown that loss of KRIT1 increases the production of reactive oxygen species (ROS) and exacerbates vascular permeability triggered by several inflammatory stimuli, but not TNF−α. We now show that endothelial ROS production directly contributes to the loss of barrier function in KRIT1 deficient animals and cells, as targeted antioxidant enzymes reversed the increase in permeability in KRIT1 heterozygous mice as shown by intravital microscopy. Rescue of the redox state restored responsiveness to TNF-α in KRIT1 deficient arterioles, but not venules. In vitro, KRIT1 depletion increased endothelial ROS production via NADPH oxidase signaling, up-regulated Nox4 expression, and promoted NF-κB dependent promoter activity. Recombinant yeast avenanthramide I, an antioxidant and inhibitor of NF-κB signaling, rescued barrier function in KRIT1 deficient cells. However, KRIT1 depletion blunted ROS production in response to TNF-α. Together, our data indicate that ROS signaling is critical for the loss of barrier function following genetic deletion of KRIT1.
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影响因子:
37.8
作者:
Chen Z;Wen L;Martin M;Hsu CY;Fang L;Lin FM;Lin TY;Geary MJ;Geary GG;Zhao Y;Johnson DA;Chen JW;Lin SJ;Chien S;Huang HD;Miller YI;Huang PH;Shyy JY
通讯作者:
Shyy JY
DOI:
10.1152/ajplung.00109.2014
发表时间:
2016-04-01
影响因子:
4.9
作者:
Cho, Rou-Ling;Yang, Chien-Chung;Yang, Chuen-Mao
通讯作者:
Yang, Chuen-Mao
影响因子:
--
作者:
HUXLEY, VH;CURRY, FE;ADAMSON, RH
通讯作者:
ADAMSON, RH
影响因子:
4.2
作者:
Han J;Shuvaev VV;Muzykantov VR
通讯作者:
Muzykantov VR
影响因子:
4.8
作者:
DiStefano, Peter V.;Kuebel, Julia M.;Glading, Angela J.
通讯作者:
Glading, Angela J.