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Single-Nucleotide Variants in microRNAs Sequences or in their Target Genes Might Influence the Risk of Epilepsy: A Review

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Abstract

Single-nucleotide variant (SNV) is a single base mutation at a specific location in the genome and may play an import role in epilepsy pathophysiology. The aim of this study was to review case–control studies that have investigated the relationship between SNVs within microRNAs (miRs) sequences or in their target genes and epilepsy susceptibility from January 1, 2010 to October 31, 2020. Nine case–control studies were included in the present review. The mainly observed SNVs associated with drug-resistant epilepsy (DRE) risk were SNVs n.60G > C (rs2910164) and n.-411A > G (rs57095329), both located at miR-146a mature sequence and promoter region, respectively. In addition, the CC haplotype (rs987195-rs969885) and the AA genotype at rs4817027 in the MIR155HG/miR-155 tagSNV were also genetic susceptibility markers for early-onset epilepsy. MiR-146a has been observed as upregulated in human astrocytes in epileptogenesis and it regulates inflammatory process through NF-κB signaling by targeting tumor necrosis factor-associated factor 6 (TRAF6) gene. The SNVs rs2910164 and rs57095329 may modify the expression level of mature miR-146a and the risk for epilepsy and SNVs located at rs987195-rs969885 haplotype and at rs4817027 in the MIR155HG/miR-155 tagSNV could interfere in the miR-155 expression modulating inflammatory pathway genes involved in the development of early-onset epilepsy. In addition, SNVs rs662702, rs3208684, and rs35163679 at 3′untranslated region impairs the ability of miR-328, let-7b, and miR-200c binding affinity with paired box protein PAX-6 (PAX6), BCL2 like 1 (BCL2L1), and DNA methyltransferase 3 alpha (DNMT3A) target genes. The SNV rs57095329 might be correlated with DRE when a larger number of patients are evaluated. Thus, we concluded that the main drawback of most of studies is the small number of individuals enrolled, which lacks sample power.

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Data Availability

The data and material will be available on request.

Abbreviations

3′-UTR:

3′untranslated region

AARS:

Alanyl-tRNA synthetase

ALDH7A1 :

Aldehyde dehydrogenase 7 family member A1

ALG13 :

Asparagine-linked glycosylation 13

BCL2L1 :

BCL2 like 1

CI:

Confidence interval

DNA:

Deoxyribonucleic acid

DNMT3A :

DNA methyltransferase 3 alpha

DRE:

Drug-resistant epilepsy

NF-kB :

Factor nuclear kappa B

GABA:

Gamma-aminobutyric acid

IFN-ϒ :

Interferon-gamma

IL-1 :

Interleukin 1

IL-1β :

Interleukin 1 beta

IRAK1 :

Interleukin 1 receptor associated kinase 1

ILAE:

International league against epilepsy

MTLE:

Mesial temporal lobe epilepsy

miRs:

MicroRNAs

NMDA:

N-Methyl-D-aspartate

OR:

Odds ratio

OMIM:

Online mendelian inheritance in man

PAX-6 :

Paired box protein PAX-6

PCR:

Polymerase chain reaction

RISC:

RNA-induced silencing complex

RNA:

Ribonucleic acid

SNVs:

Single-nucleotide variants

SCN1A :

Sodium voltage-gated channel alpha subunit 1

SCN2A:

Sodium voltage-gated channel alpha subunit 2

SCN1B :

Sodium voltage-gated channel beta Subunit 1

TlE:

Temporal lobe epilepsy

TNF-α :

Tumor necrosis factor alpha

TRAF6:

Tumor necrosis factor receptor (TNFR)-associated actor 6

WHO:

World Health Organization

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Funding

The financial support provided for this work by the São Paulo Research Foundation (FAPESP) scholarship# 2018/12057-0, and National Council for Scientific and Technological Development (CNPq) scholarship#149884/2019-2, are gratefully acknowledged.

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Contributions

Conception and design: MMO; acquisition of data: RPB, MNB, BC; analyses and interpretation of data: MMO, FALM, PHPA; statistical analyses: FALM; drafting of the manuscript: RPB, MMO; study supervision: MMO. All authors were involved in revision of the manuscript and have approved the final version.

Corresponding author

Correspondence to Manoela Marques Ortega.

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The authors declare that they have no conflict of interest.

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This study was approved by the Ethic Committee of Universidade São Francisco (USF) (CAAE: 90786718.1.0000.5514). We confirm that we have read the Journal’s position on issues involved in ethical publication and affirm that this report is consistent with those guidelines.

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Buainain, R.P., Boschiero, M.N., Camporeze, B. et al. Single-Nucleotide Variants in microRNAs Sequences or in their Target Genes Might Influence the Risk of Epilepsy: A Review. Cell Mol Neurobiol 42, 1645–1658 (2022). https://doi.org/10.1007/s10571-021-01058-7

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  • DOI: https://doi.org/10.1007/s10571-021-01058-7

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