Evidence map›Paper›PMID 40178659›Full record

SynthesisNeurogenetics2025

The association of SCN1A polymorphisms with epilepsy and drug resistance: a systematic review and meta-analysis.

Ida Mohammadi, Shahryar Rajai Firouzabadi, Aryan Aarabi, Samin Sadraei, Aidin Saadati, Sana Mohammad Soltani, Behnam Safarpour Lima

Abstract readSystematic ReviewMeta-Analysis
PubMed Publisher
In one paragraph

Synthesis in Neurogenetics, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

1 citing paper in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Ida MohammadiSchool of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran. idamohammadi2000@gmail.com.ORCID http://orcid.org/0000-0002-0662-0329
Shahryar Rajai FirouzabadiSchool of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.ORCID http://orcid.org/0000-0001-6511-4103
Aryan AarabiSchool of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.ORCID http://orcid.org/0000-0002-0545-4891
Samin SadraeiSchool of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.ORCID http://orcid.org/0000-0003-3988-7449
Aidin SaadatiSchool of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Sana Mohammad SoltaniSchool of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.ORCID http://orcid.org/0000-0002-4004-904X
Behnam Safarpour LimaDepartment of Neurology, Imam Hossein Educational Hospital, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.ORCID http://orcid.org/0000-0003-1140-7589

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Epilepsy is one of the most common neurological afflictions worldwide, with one-third of patients exhibiting resistance to treatment. It has been speculated that the polymorphisms of the sodium channel alpha subunit 1 (SCN1A) gene are associated with both the occurrence of epilepsy and its resistance to treatment. The aim of this study is to systematically review the literature and conduct meta-analyses revealing the associations of the SCN1A polymorphisms with epilepsy and resistance to treatment. We conducted a search of Pubmed, Web of Science, and Scopus, and if more than two studies investigated a polymorphism, odds ratios for association with epilepsy and/or resistance to treatment were calculated in three allelic, homozygous, and recessive genetic models. The initial search yielded 4106 items, and a total of 64 articles met the final inclusion criteria. With respect to the occurrence of epilepsy, the rs2298771 polymorphism was revealed to be negatively associated in the recessive model, while the associations of other polymorphisms were not statistically significant. With regard to resistance to treatment, rs2298771 was revealed to be positively associated across all three models, and rs10167228 was positively associated in the allelic and homozygous models, but not the recessive model. Other polymorphisms were not shown to be associated with resistance to treatment. In conclusion, we demonstrated that the rs2298771 polymorphism had a significant and negative association with the occurrence of epilepsy. Furthermore, rs2298771 and rs10167228 polymorphisms had positive associations with resistance to treatment. Further studies are needed to explore these associations among other polymorphisms.

Indexed as

Drug ResistanceEpilepsyNAV1.1 Voltage-Gated Sodium ChannelPolymorphism, Single NucleotideAllelesGenetic Association StudiesGenetic Predisposition to DiseaseHumansNAV1.1 Voltage-Gated Sodium ChannelSCN1A protein, humanDrug resistanceEpilepsyPolymorphismSCN1A

Identifiers

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.