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FOR AUTHORS Bratislava Medical Journal 2021 Bratislava Medical Journal Vol.122, No.6, p.396–404,2021
FOR AUTHORS Bratislava Medical Journal 2021 Bratislava Medical Journal Vol.122, No.6, p.396–404,2021
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Bratislava Medical Journal Vol.122, No.6, p.396–404,2021 |
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| Title: Treating atrial fibrillation with radiofrequency ablation to reverse changes in microRNAs regulating the ion-channel proteins | ||
| Author: Y. N. Yue, B. Li, G. Y. Xu, S. X. Yang | ||
| Abstract: OBJECTIVE: To investigate the possible molecular mechanisms of radiofrequency ablation (RFA) for treating atrial fibrillation (AF) and the microRNA (miRNA) target for intervention in the future. METHODS: We examined the changes in miRNAs regulating the atrial ion-channel proteins across the whole genome. We compared findings from 90 AF patients with those from 90 healthy subjects before RFA and three months after RFA. RESULT: Twenty-one miRNAs regulating ion-channel proteins were differentially expressed more than ten-fold, and the findings were completely reversed after RFA as compared with the pre-RFA results. The colonial regulating effects of miRNAs regulating the outward K+ current channels such as those for the ultra-rapid delayed rectifier potassium current (Ikur), voltage-dependent delayed rectifier potassium current (Ikr), and delayed rectifier potassium channel current (Iks) were more unanimous and stronger, while this was not the case for miRNAs regulating the L-type Ca2+ current and INa current channels. Generally, miR-1266 levels were increased in the blood but down-regulated in the rheumatic atrial tissue, while a dual luciferase test indicated that SCN5A was the direct target gene of miR-1266. CONCLUSION: Using RFA to treat AF may have an impact via reversing the changes in miRNAs regulating the ion-channel proteins, especially for outward K+ current channels such as Ikur, Ikr, and Iks, which may play a major role in electrical remodeling in AF. It may be that miR-1266 is an antiarrhythmic miRNA and an AF intervention target in the future (Tab. 2, Fig. 4, Ref. 46). |
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| Keywords: atrial fibrillation, miRNA, genomics, radiofrequency ablation, ion-channel proteins | ||
| Published online: 18-May-2021 | ||
| Year: 2021, Volume: 122, Issue: 6 | Page From: 396, Page To: 404 | |
| doi:10.4149/BLL_2021_066 |
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