Unraveling the Complex Interplay between Alpha-Synuclein and Epigenetic Modification

Area of Science:

• Neuroscience
• Genetics
• Molecular Biology

Background:

• Alpha-synuclein (αS) is a presynaptic neuronal protein linked to Parkinson's disease (PD).
• Mutations and multiplication of the SNCA gene cause familial PD, highlighting gene dosage effects.
• Misfolded αS forms Lewy bodies, a pathological hallmark of PD, and is cytotoxic.

Purpose of the Study:

• To investigate the role of SNCA gene expression and epigenetic alterations in PD pathogenesis.
• To explore how nuclear αS influences neuronal function and epigenetic stability.
• To identify novel pathways for developing disease-modifying therapies for PD.

Main Methods:

• Analysis of SNCA gene dosage and expression in PD.
• Investigation of epigenetic alterations (CpG methylation, histone marks) affecting SNCA expression.
• Examination of αS post-translational modifications and nuclear translocation.
• Utilizing RNA sequencing datasets from human midbrain-like organoids for comparative analysis.

Main Results:

• SNCA multiplication is sufficient to cause PD, indicating gene dosage is critical.
• Epigenetic alterations synergistically upregulate αS expression.
• Nuclear αS interacts with epigenetic machinery, affecting neuronal function stability.
• Transcriptomic data can reveal pathways influenced by epigenetic alterations.

Conclusions:

• Epigenetic modifications play a significant role in regulating αS expression and PD pathogenesis.
• Nuclear αS impacts neuronal epigenetic stability, potentially contributing to PD.
• An informatic approach using transcriptomics offers a promising avenue for discovering new PD therapies.