Evidence map›Paper›PMID 39831374›Full record

SynthesisEuropean journal of neurology2025

Mitochondrial DNA (mtDNA) as fluid biomarker in neurodegenerative disorders: A systematic review.

Barbara Risi, Alberto Imarisio, Giada Cuconato, Alessandro Padovani, Enza Maria Valente, Massimiliano Filosto

Abstract readSystematic Review
In one paragraph

Synthesis in European journal of neurology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
16citing 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

16 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
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  15. Precision medicine and music therapy for Parkinson's Disease.Clinical parkinsonism & related disorders · 2025
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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.

Barbara RisiNeMO-Brescia Clinical Center for Neuromuscular Diseases, Brescia, Italy.ORCID 0009-0008-2303-1180
Alberto ImarisioDepartment of Molecular Medicine, University of Pavia, Pavia, Italy.ORCID 0000-0002-1206-4170
Giada CuconatoDepartment of Molecular Medicine, University of Pavia, Pavia, Italy.
Alessandro PadovaniDepartment of Clinical and Experimental Sciences, University of Brescia, Brescia, Italy.
Enza Maria ValenteDepartment of Molecular Medicine, University of Pavia, Pavia, Italy.
Massimiliano FilostoNeMO-Brescia Clinical Center for Neuromuscular Diseases, Brescia, Italy.ORCID 0000-0002-2852-7512

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundSeveral studies evaluated peripheral and cerebrospinal fluid (CSF) mtDNA as a putative biomarker in neurodegenerative diseases, often yielding inconsistent findings. We systematically reviewed the current evidence assessing blood and CSF mtDNA levels and variant burden in Parkinson's disease (PD), Alzheimer's disease (AD) and amyotrophic lateral sclerosis (ALS). Multiple sclerosis (MS) was also included as a paradigm of chronic neuroinflammation-driven neurodegeneration.

methodsMedline, Embase, Scopus and Web of Science were searched for articles published from inception until October 2023. Studies focused on mtDNA haplogroups or hereditary pathogenic variants were excluded. Critical appraisal was performed using the Quality Assessment for Diagnostic Accuracy Studies criteria.

resultsFifty-nine original studies met our a priori-defined inclusion criteria. The majority of CSF-focused studies showed (i) decreased mtDNA levels in PD and AD; (ii) increased levels in MS compared to controls. No studies evaluated CSF mtDNA in ALS. Results focused on blood cell-free and intracellular mtDNA were contradictory, even within studies evaluating the same disease. This poor reproducibility is likely due to the lack of consideration of the many factors known to affect mtDNA levels. mtDNA damage and methylation levels were increased and reduced in patients compared to controls, respectively. A few studies investigated the correlation between mtDNA and disease severity, with conflicting results.

conclusionsAdditional well-designed studies are needed to evaluate CSF and blood mtDNA profiles as putative biomarkers in neurodegenerative diseases. The identification of "mitochondrial subtypes" of disease may enable novel precision medicine strategies to counteract neurodegeneration.

Indexed as

DNA, MitochondrialNeurodegenerative DiseasesAlzheimer DiseaseAmyotrophic Lateral SclerosisBiomarkersHumansParkinson DiseaseBiomarkersDNA, MitochondrialAlzheimer's diseaseamyotrophic lateral sclerosisbiomarkerbloodcerebrospinal fluidmitochondrial DNAneurodegenerationParkinson's disease

Identifiers

PMID39831374
PMCPMC11744304

What Socratic holds

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LicenceCC BY-NC
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Registered trials

None linked

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 Socratic graph.