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Related Experiment Video

Updated: Apr 17, 2026

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Pathological interface between oligomeric alpha-synuclein and tau in synucleinopathies.

Urmi Sengupta1, Marcos J Guerrero-Muñoz1, Diana L Castillo-Carranza1

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Biological Psychiatry
|February 14, 2015
PubMed
Summary

Synucleinopathies like Parkinson's disease involve abnormal alpha-synuclein and tau protein buildup. This study found these proteins form toxic hybrid oligomers in patient brains, suggesting they interact and influence each other's aggregation.

Keywords:
Co-aggregationHybrid oligomersInteractionSynucleinopathyTau oligomersα-Synuclein oligomers

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Area of Science:

  • Neuroscience
  • Biochemistry
  • Pathology

Background:

  • Synucleinopathies are characterized by alpha-synuclein accumulation in inclusion bodies.
  • Oligomeric forms of pathogenic proteins are implicated in neuronal damage.
  • The interrelationship between alpha-synuclein and tau oligomers in synucleinopathies remains unclear.

Purpose of the Study:

  • To investigate the co-occurrence and interaction of alpha-synuclein and tau oligomers in synucleinopathies.
  • To utilize novel conformation-specific antibodies for detecting these oligomeric species.

Main Methods:

  • Employed two novel antibodies (F8H7, Syn33) targeting alpha-synuclein oligomers.
  • Analyzed brain tissue from Parkinson's disease and dementia with Lewy bodies patients.
  • Performed biophysical and biochemical assays, including using the anti-tau oligomer antibody T22.

Main Results:

  • Demonstrated accumulation of tau oligomers alongside alpha-synuclein oligomers in diseased brains.
  • Observed that tau and alpha-synuclein oligomers coexist within the same aggregates.
  • Identified the formation of hybrid oligomers composed of both alpha-synuclein and tau.

Conclusions:

  • Provided evidence for tau oligomer deposition in synucleinopathies.
  • Showcased the co-occurrence of toxic oligomeric forms of alpha-synuclein and tau.
  • Suggested that these oligomeric species interact and influence each other's aggregation pathways.