Cited by 141Mitochondrial Function and PathologyNeuroinflammation and Neurodegeneration MechanismsMultiple Sclerosis Research Studies

ccf-mtDNA as a Potential Link Between the Brain and Immune System in Neuro-Immunological Disorders

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Gambardella, Stefano, Limanaqi, Fiona, Ferese, Rosangela, Biagioni, Francesca, Campopiano, Rosa, Centonze, Diego, Fornai, Francesco·2019·Frontiers in Immunology

Abstract

Fragments of mitochondrial DNA (mtDNA) are released outside the cell and they appear to persist in extracellular fluids as circulating, cell-free, mtDNA (ccf-mtDNA). When compared to nuclear DNA, such a double stranded mtDNA is more resistant to nuclease degradation. In fact, it is stable extracellularly where it can be detected in both plasma and cerebrospinal fluid (CSF), here acting as a potential biomarker in various disorders. In neurological diseases (Alzheimer's disease, Parkinson's disease and end-stage progressive Multiple Sclerosis), a decreased amount of CSF ccf-mtDNA is related with progressive cell dysfunction. This suggests an alteration in neuronal mtDNA levels (mtDNA replication, degradation and depletion) in vulnerable brain regions at early stages of neurodegeneration leading to reduced mtDNA release, which takes place before actual cell death occurs. On the other hand, elevated CSF ccf-mtDNA levels are reported in acute phases of relapsing-remitting Multiple Sclerosis (RRMS). This occurs during acute inflammation, which anticipates the neurodegenerative process. Thus, an increase in inflammatory cells in the affected regions is expected to add on mtDNA release into the CSF. In addition, similarly to bacterial DNA, the non-methylated CpG sites of mtDNA, which activate innate immunity and inflammation, are likely to participate in the molecular mechanisms of disease. Thus, ccf-mtDNA may represent a powerful biomarker for disease screening and prognosis at early stage, although its biological role may extend to generating the neurobiology of disease. The present manuscript discusses recent experimental findings in relationship with clinical evidence comparing neuro-immunological features of neurodegenerative disorders with frankly neuro-infectious diseases.

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Crossref · 10.3389/fimmu.2019.01064

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  • Assessing presence of extracellular mitochondria or their fragments by measuring ccf-mtDNA levels could allow on-flight direct estimation of cellular stress to take preventive measures of cumulative damage.

    “Assessing the presence of extracellular mitochondria or their fragments by measuring ccf-mtDNA levels could allow on-flight direct estimation of cellular stress to take preventive measures of cumulative damage196,199–206.”

    From Key points for the development of antioxidant cocktails to prevent cellular stress and damage caused by reactive oxygen species (ROS) during manned space missions (2021) · cites this paper as [203]

    The Introduction (page not provided) describes ccf-mtDNA as a potential biomarker of cell death and tissue injury, and the Neuro-Infections section says its levels may reflect tissue damage or disease severity. The paper does not establish that measuring it provides a direct estimate of cellular stress during flight or enables preventive measures against cumulative damage. (LLM, conf=0.86)

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Authors
Gambardella, S., Limanaqi, F., Ferese, R., Biagioni, F., Campopiano, R., Centonze, D., & Fornai, F.
Affiliations
  • Istituto Neurologico Mediterraneo (IT)
  • University of Pisa (IT)
  • University of Rome Tor Vergata (IT)
Corresponding author
Gambardella, Stefano
Venue
Frontiers in Immunology
Published
2019-05-09
Volume
10
Pages
1064-1064
ISSN
1664-3224 (ISSN-L)
OpenAlex
W2944647162
Cited by
141
References
87
Citations by year
2026: 12 · 2025: 22 · 2024: 22 · 2023: 27 · 2022: 22 · 2021: 21 · 2020: 13 · 2019: 1 · 2017: 1
FWCI
1.26
Type
journal article
Language
en
Open access
Locations
  • Frontiers in Immunology (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Archivio Istituzionale della Ricerca (Universita Degli Studi Di Milano) (submittedVersion, other-oa)
  • CINECA IRIS Institutial research information system (University of Pisa) (submittedVersion)
  • Cineca Institutional Research Information System (Tor Vergata University) (submittedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • CINECA IRIS Institutional Research information system (University of Urbino) (submittedVersion)
Funders
Ministero della Salute
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Multiple Sclerosis Research Studies
Keywords
circulating cell-free mitochondrial DNA, cerebrospinal fluid biomarkers, neuroinflammation, neurodegeneration, Alzheimer's disease, Parkinson's disease, multiple sclerosis, relapsing-remitting multiple sclerosis, mitochondrial DNA release, CpG sites, innate immunity, central nervous system infection
MeSH terms
Cell-Free Nucleic Acids, Animals, Brain, Disease Susceptibility, DNA, Mitochondrial, Gene Expression Regulation, Humans, Immune System, Mitochondria, Nervous System Diseases, Neuroimmunomodulation, Signal Transduction, Biomarkers, Neurodegenerative Diseases, MicroRNAs, Exosomes

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