Lack of association between mitochondrial DNA haplogroups J and T and clinical manifestation in Russian patients with Brugada syndrome

Golubenko,Maria; Mikhailov,Vadim; Rusinova,Valeria; Shestak,Anna; Zaklyazminskaya,Elena

doi:10.3892/br.2020.1324

Lack of association between mitochondrial DNA haplogroups J and T and clinical manifestation in Russian patients with Brugada syndrome

Authors:
- Maria Golubenko
- Vadim Mikhailov
- Valeria Rusinova
- Anna Shestak
- Elena Zaklyazminskaya
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Affiliations: Laboratory of Population Genetics, Research Institute of Medical Genetics, Tomsk National Research Medical Centre of The Russian Academy of Sciences, Tomsk 634050, Russia, Petrovsky National Research Centre of Surgery, Moscow 119991, Russia
Published online on: July 2, 2020 https://doi.org/10.3892/br.2020.1324
Article Number: 16

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Abstract

Brugada syndrome (BrS) is an inherited disorder characterized by specific ST segment elevation in the right precordial leads, pseudo right bundle branch block, and a high risk of sudden cardiac death due to ventricular tachycardia. It was initially described as a monogenic disorder with an autosomal dominant mode of inheritance. It is hypothesized that modifying genetic factors, in addition to disease‑causing mutations, may significantly contribute to the clinical symptoms and the risk of sudden cardiac death. These modifying factors can include mitochondrial DNA (mtDNA) variants. In particular, combination of mtDNA m.T4216C, m.A11251G, m.C15452A and m.T16126C variants (defining haplogroups T and J), is considered to be a factor that promotes manifestation of BrS manifestation, with no pro‑arrhythmic effects. The aim of the present study was to confirm the reported association of BrS with MtDNA variants in a cohort of Russian patients. mtDNA haplogroups were genotyped in 47 Russian BrS probands and the prevalence of common mtDNA haplogroups was compared with the general population in European part of Russia. The distribution and prevalence of all but the J mtDNA haplogroups were comparable in BrS probands and the general Russian population. The mitochondrial J haplogroup was not found in the BrS cohort. In conclusion, it was shown that the mtDNA polymorphism, m.T4216C (haplogroups J and T) does not contribute significantly to the clinical manifestation of BrS in Russian patients.

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