Polymorphic Alpha-Synuclein Oligomers: Characterization and Differential Detection with Novel Corresponding...

Area of Science:

• Neuroscience
• Biochemistry
• Immunology

Background:

• Neurodegenerative diseases are characterized by protein aggregate accumulation.
• Synucleinopathies, including Parkinson's disease, involve alpha-synuclein (α-Syn) aggregates.
• Oligomeric protein species are understood to be the most toxic aggregate forms.

Purpose of the Study:

• To confirm the existence of α-Syn oligomeric polymorphs.
• To characterize the biological relevance and distinct properties of these α-Syn polymorphs.
• To evaluate the efficacy of novel monoclonal antibodies (SynTCs) targeting specific α-Syn conformations.

Main Methods:

• Biochemical and biophysical assays.
• Cell-based assays using primary cortical neurons.
• Development and utilization of novel α-Syn toxic conformation monoclonal antibodies (SynTCs).

Main Results:

• α-Syn oligomeric polymorphs exhibit distinct immunoreactivity and binding affinities for SynTCs.
• SynTCs demonstrate differential selectivity and binding enthalpies for various α-Syn species.
• SynTCs selectively reduce α-Syn oligomeric polymorph-mediated neurotoxicity and propagation.

Conclusions:

• Polymorphic α-Syn oligomers have significant biological relevance.
• Polymorph-specific antibodies are crucial for targeting toxic α-Syn aggregates.
• Targeting conformational heterogeneity of α-Syn oligomers with antibodies offers promising immunotherapeutic potential.