Evidence map›Paper›PMID 41121274›Full record

ArticleJournal of neuroinflammation2025

Exosomal pHERV-W ENV as a dynamic biomarker for relapse prediction and prognosis in multiple sclerosis.

Esber S Saba, May F Mrad, Layane Nakib, Vera Dermesrobian, Joseph Abboud, Samia J Khoury

Abstract read
In one paragraph

Article in Journal of neuroinflammation, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.

0numbers the graph read from it
0cells of the map it votes in
3citing papers in PubMed
–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

3 citing papers in PubMed.

  1. Review
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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

6 authors.

Esber S Saba *Department of Experimental Pathology, Immunology and Microbiology, Faculty of Medicine, American University of Beirut, Beirut, Lebanon.ORCID http://orcid.org/0000-0003-1525-6394
May F Mrad *Department of Experimental Pathology, Immunology and Microbiology, Faculty of Medicine, American University of Beirut, Beirut, Lebanon.ORCID http://orcid.org/0000-0003-4379-5862
Layane NakibDepartment of Experimental Pathology, Immunology and Microbiology, Faculty of Medicine, American University of Beirut, Beirut, Lebanon.ORCID http://orcid.org/0000-0002-7784-7416
Vera DermesrobianDepartment of Microbiology, Immunology and Transplantation, KU Leuven Flow and Mass Cytometry Facility, KU Leuven, Leuven, 3000, Belgium.ORCID http://orcid.org/0009-0001-9508-0108
Joseph AbboudNehme and Therese Tohme Multiple Sclerosis Center, Faculty of Medicine, American University of Beirut Medical Center, Beirut, Lebanon.ORCID http://orcid.org/0009-0003-2850-8551
Samia J KhouryNehme and Therese Tohme Multiple Sclerosis Center, Faculty of Medicine, American University of Beirut Medical Center, Beirut, Lebanon. sk88@aub.edu.lb.ORCID http://orcid.org/0000-0003-3198-6063

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundEmerging evidence implicates the envelope protein of human endogenous retrovirus type W (pHERV-W ENV) in the pathogenesis of multiple sclerosis (MS); however, its clinical utility as a biomarker remains incompletely defined. In this study, we demonstrate that pHERV-W ENV is enriched on serum-derived exosomes in patients with relapsing-remitting MS (RRMS), where it reflects both current disease activity and future risk.

methodsExosomal pHERV-W ENV levels were profiled across three cohorts: (1) a cross-sectional cohort including healthy controls, stable MS patients, and patients with active disease; (2) a longitudinal RRMS cohort with samples collected before, during, and after episodes of disease activity; and (3) a retrospective longitudinal cohort of newly diagnosed RRMS patients with three years of follow-up.

resultsWe observed an increase in exosomal pHERV-W ENV expression during active disease, followed by a decline at follow-up. Levels of pHERV-W ENV expression during active disease positively correlated with Epstein-Barr virus (EBV)-derived latent membrane protein 2 A (LMP2A) expression, supporting an association between endogenous retroviral expression and EBV activity. Flow cytometric profiling of immune cell subsets identified monocytes and B cells as the predominant sources of circulating pHERV-W ENV. Longitudinal profiling further revealed coordinated immune and vascular activation during active disease, including a significant positive correlation between exosomal pHERV-W ENV and the costimulatory molecule CD40. Notably, high baseline levels of exosomal pHERV-W ENV were associated with greater total disease activity events, defined as the sum of clinical relapses and MRI activity (new/enlarging T2 or gadolinium-enhancing (Gd+) lesions) over three years, as well as with accelerated loss of "No Evidence of Disease Activity" (NEDA) status over time.

conclusionThese findings suggest that exosomal pHERV-W ENV expression may serve as a dynamic, non-invasive biomarker of disease activity with prognostic value in MS.

Indexed as

Endogenous RetrovirusesExosomesGene Products, envMultiple Sclerosis, Relapsing-RemittingAdultBiomarkersCohort StudiesCross-Sectional StudiesFemaleHumansLongitudinal StudiesMaleMiddle AgedPrognosisRecurrenceRetrospective StudiesBiomarkersGene Products, env

Identifiers

PMID41121274
PMCPMC12542391

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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.