MDR1 deficiency impairs mitochondrial homeostasis and promotes intestinal inflammation.
MDR1 deficiency impairs mitochondrial homeostasis and promotes intestinal inflammation.
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DOI:
10.1038/mi.2017.31
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发表时间:
2018-01
影响因子:
8
通讯作者:
Satsangi J
中科院分区:
文献类型:
--
作者:
Ho GT;Aird RE;Liu B;Boyapati RK;Kennedy NA;Dorward DA;Noble CL;Shimizu T;Carter RN;Chew ETS;Morton NM;Rossi AG;Sartor RB;Iredale JP;Satsangi J
The multidrug-resistance-1 (MDR1) gene encodes an ATP-dependent efflux transporter that is highly expressed in the colon. In mice, loss of MDR1 function results in colitis with similarities to human inflammatory bowel diseases (IBD). Here, we show that MDR1 has an unexpected protective role for the mitochondria where MDR1-deficiency results in mitochondrial dysfunction with increased mitochondrial ROS (mROS) driving the development of colitis. Exogenous induction of mROS accelerates, whilst inhibition attenuates colitis in vivo; these effects are amplified in MDR1-deficiency. In human IBD, MDR1 is negatively correlated to SOD2 gene expression required for mROS detoxification. To provide direct evidential support, we deleted intestinal SOD2 gene in mice and showed an increased susceptibility to colitis. We exploited the GWA datasets and found many (~5%) of IBD susceptibility genes with direct roles in regulating mitochondria homeostasis. As MDR1 primarily protects against xenotoxins via its efflux function, our findings implicate a distinct mitochondrial toxin + genetic susceptibility interaction leading to mitochondrial dysfunction, a novel pathogenic mechanism that could offer many new therapeutic opportunities for IBD.
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影响因子:
29
作者:
Donohoe DR;Garge N;Zhang X;Sun W;O'Connell TM;Bunger MK;Bultman SJ
通讯作者:
Bultman SJ
影响因子:
30.8
作者:
通讯作者:
--
影响因子:
56.9
作者:
Bonifati, V;Rizzu, P;Heutink, P
通讯作者:
Heutink, P
影响因子:
64.8
作者:
通讯作者:
--
DOI:
10.12703/p7-44
发表时间:
2015
期刊:
F1000prime reports
影响因子:
--
作者:
Boyapati R;Satsangi J;Ho GT
通讯作者:
Ho GT