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Research summary · 9 d ago

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HLA-DRB1*04:05 in EBV-Seronegative Mouse Patients

In a cohort study of Japanese MS patients, all EBV-seronegative cases carried the HLA-DRB1*04:05 gene variant, but the probability of observing this by chance was low, indicating a non-significant finding.

Tags: #MSResearch
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Source: Read original source (PMID 42810048)

This plain-English summary was written by AI from a published abstract and may contain errors. It is not medical advice. Read the original study and talk to your MS team before making decisions about treatment.

Why it matters

This observation raises questions about the potential role of HLA-DRB1*04:05 in EBV infection resistance among MS patients, highlighting areas for further research despite the small sample size.

What this does not prove

Due to the limited number of EBV-seronegative cases, these findings are only hypothesis-generating. They do not confirm any causal relationship between the genetic variant and EBV resistance.

Next milestone

No next milestone was established from the available source.

Study facts

Study design: Not reported
Participants / samples: Not reported
Randomised: Not reported
Controlled: Not reported
Primary endpoint met: Not reported
Relevant MS type: Not reported
Publication date: 2026-09-25
Evidence reviewed: Abstract only
Regulatory approval: Not reported
Research areas: Not classified

Original sources

Primary evidenceHLA-DRB1*04:05 in Epstein-Barr virus-seronegative multiple sclerosis: a Japanese single-center study. ↗DOI: 10.1016/j.msard.2026.107947

Supporting passages (4)

sample size basisMETHODS: We retrospectively reviewed 123 consecutive Japanese patients with MS who fulfilled the 2017 McDonald criteria and were negative for both anti-aquaporin-4 and anti-MOG antibodies.

findingsAll EBV-seronegative MS patients in this cohort carried HLA-DRB1*04:05.

limitationsBecause the number of seronegative cases is very small, this observation is hypothesis-generating rather than confirmatory: it is compatible with, but does not establish, the possibility that DRB1*04:05 confers resistance to EBV infection or an attenuated humoral response to the virus.

publication datePublication date: 2026-09-25

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