Related Experiment Video

Updated: May 10, 2025

Time-Lapse Video Microscopy for Assessment of EYFP-Parkin Aggregation as a Marker for Cellular Mitophagy
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Pathogenetic Involvement of Autophagy and Mitophagy in Primary Progressive Multiple Sclerosis

Simone Patergnani1, Michele Laudisi2, Massimo Bonora1

  • 1Department of Medical Sciences, Section of Experimental Medicine, and Laboratory for Technologies of Advanced Therapies (LTTA), University of Ferrara, Ferrara, Italy.

Journal of Cellular and Molecular Medicine
|April 21, 2025
PubMed

Insights

Autophagy and mitophagy, crucial cellular recycling processes, are significantly reduced in primary progressive multiple sclerosis (PPMS) patients. These findings suggest potential biomarkers for early PPMS detection and monitoring.

Area of Science:

  • Neuroscience
  • Cellular Biology
  • Biochemistry

Background:

  • Primary progressive multiple sclerosis (PPMS) is a debilitating neurological disease with poorly understood molecular mechanisms and limited treatment options.
  • Current diagnostic and monitoring tools for PPMS lack specificity, hindering early intervention and disease management.
  • Autophagy and mitophagy are essential cellular processes involved in maintaining cellular health and function, particularly in neurons.

Purpose of the Study:

  • To investigate the roles of autophagy and mitophagy in the pathogenesis of PPMS.
  • To identify potential circulating biomarkers for early detection and monitoring of PPMS.
  • To explore the relationship between autophagy, mitophagy, and neurodegeneration in PPMS.

Main Methods:

  • Serum samples were collected from PPMS patients, relapsing-remitting multiple sclerosis (RRMS) patients, and healthy controls.
  • Levels of autophagy markers (ATG5, ATG7) and mitophagy markers (Parkin, Optineurin) were quantified using biochemical assays.
  • Markers of neurodegeneration and mitochondrial dysfunction were also assessed.
  • Correlational analyses were performed to investigate the relationships between autophagy, mitophagy, and disease markers.

Main Results:

  • Autophagy markers (ATG5, ATG7) and mitophagy markers (Parkin, Optineurin) were significantly reduced in the serum of PPMS patients compared to controls and RRMS individuals.
  • Reduced autophagy and mitophagy were associated with increased markers of neurodegeneration and mitochondrial dysfunction in PPMS patients.
  • A positive correlation was observed between autophagy and mitophagy proteins in the PPMS group, indicating their interconnected regulation.
  • Distinct patterns of autophagy and mitophagy were identified across different multiple sclerosis subtypes.

Conclusions:

  • Autophagy and mitophagy play significant roles in the pathophysiology of PPMS.
  • Circulating levels of autophagy and mitophagy markers show distinct patterns in PPMS, suggesting their potential as early diagnostic biomarkers.
  • Further research into modulating autophagy and mitophagy may offer novel therapeutic strategies for PPMS.
Keywords:
ATG5ATG7GFAPOptineurinParkinbiomarkerlactateserum

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