Title : Up-regulation of miR-21 and miR-23a Contributes to As2 O3 -induced hERG Channel Deficiency.

Pub. Date : 2015 Jun

PMID : 25395240






13 Functional Relationships(s)
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1 Previous studies showed that As2O3 can damage the hERG current via disturbing its trafficking to cellular membrane. Arsenic Trioxide ETS transcription factor ERG Homo sapiens
2 Consistent with these findings, in this study, we reported that As2O3 inhibited hERG channel at both protein and mRNA levels and damaged hERG current but did not affect channel kinetics. Arsenic Trioxide ETS transcription factor ERG Homo sapiens
3 Consistent with these findings, in this study, we reported that As2O3 inhibited hERG channel at both protein and mRNA levels and damaged hERG current but did not affect channel kinetics. Arsenic Trioxide ETS transcription factor ERG Homo sapiens
4 Further, we demonstrated that As2O3 up-regulated miR-21 and miR-23a expression in hERG-HEK293 cells and neonatal cardiomyocytes. Arsenic Trioxide ETS transcription factor ERG Homo sapiens
5 In addition, knock-down of miR-21 by its specific antisense molecules AMO-21 was able to rescue Sp1 and hERG inhibition caused by As2O3. Arsenic Trioxide ETS transcription factor ERG Homo sapiens
6 This finding revealed that regulation of the NF-kappaB-miR-21-Sp1 signalling pathway is a novel mechanism for As2O3-induced hERG inhibition. Arsenic Trioxide ETS transcription factor ERG Homo sapiens
7 And the hERG channel inhibition induced by As2O3 was rescued after being transfected with AMO-23a, which may be a molecular mechanism for the role of As2O3 in hERG trafficking deficiency. Arsenic Trioxide ETS transcription factor ERG Homo sapiens
8 And the hERG channel inhibition induced by As2O3 was rescued after being transfected with AMO-23a, which may be a molecular mechanism for the role of As2O3 in hERG trafficking deficiency. Arsenic Trioxide ETS transcription factor ERG Homo sapiens
9 And the hERG channel inhibition induced by As2O3 was rescued after being transfected with AMO-23a, which may be a molecular mechanism for the role of As2O3 in hERG trafficking deficiency. Arsenic Trioxide ETS transcription factor ERG Homo sapiens
10 And the hERG channel inhibition induced by As2O3 was rescued after being transfected with AMO-23a, which may be a molecular mechanism for the role of As2O3 in hERG trafficking deficiency. Arsenic Trioxide ETS transcription factor ERG Homo sapiens
11 In brief, our study revealed that miR-21 and miR-23a are involved in As2O3-induced hERG deficiency at transcriptional and transportational levels. Arsenic Trioxide ETS transcription factor ERG Homo sapiens
12 This discovery may provide a novel mechanism of As2O3-induced hERG channel deficiency, and these miRNAs may serve as potential therapeutic targets for the handling of As2O3 cardiotoxicity. Arsenic Trioxide ETS transcription factor ERG Homo sapiens
13 This discovery may provide a novel mechanism of As2O3-induced hERG channel deficiency, and these miRNAs may serve as potential therapeutic targets for the handling of As2O3 cardiotoxicity. Arsenic Trioxide ETS transcription factor ERG Homo sapiens