Inflammation promotes synucleinopathy propagation.

Area of Science:

• Neuroscience
• Molecular Biology
• Immunology

Background:

• Proteinopathy spread is key to neurodegenerative disease progression.
• Mechanisms of proteinopathy spread are not fully understood.
• Inflammation is hypothesized to play a fundamental role.

Purpose of the Study:

• To investigate the role of inflammation in alpha-synucleinopathy spread.
• To determine if an inflammatory microenvironment drives protein aggregate propagation.
• To explore potential anti-inflammatory therapeutic strategies.

Main Methods:

• Utilized a V40G alpha-synuclein variant in mouse models.
• Administered anti-inflammatory agents orally.
• Assessed aggregate spreading, microgliosis, and inflammatory responses.
• Exposed cells to inflammatory cytokines to study propagation.

Main Results:

• V40G induced significant aggregate spreading, preceded by robust microgliosis and inflammation.
• Anti-inflammatory treatment suppressed aggregate spread, inflammation, and behavioral deficits.
• Inflammatory cytokines enhanced cell-to-cell propagation of alpha-synuclein.

Conclusions:

• The inflammatory microenvironment is a major driver of synucleinopathy spread.
• Targeting neuroinflammation may be a viable therapeutic approach.
• This study provides new insights into the pathogenesis of synucleinopathies.