Pathological Pathways and Alpha-Synuclein in Parkinson's Disease: A View from the Periphery

Area of Science:

• Neuroscience
• Neuropathology
• Autonomic Nervous System Disorders

Background:

• Parkinson's disease (PD) is characterized by alpha-synuclein inclusions in the central nervous system.
• Emerging evidence suggests PD is a multisystemic disorder with peripheral alpha-synuclein pathology.
• Early non-motor autonomic symptoms highlight the peripheral nervous system's role in PD progression.

Purpose of the Study:

• To review alpha-synuclein-related pathological processes in the peripheral nervous system in Parkinson's disease.
• To explore the molecular, cellular, and systemic modifications associated with peripheral alpha-synuclein.
• To discuss the relevance of peripheral pathology in the etiopathogenesis of PD.

Main Methods:

• Literature review of studies on alpha-synuclein pathology in the peripheral nervous system in Parkinson's disease.
• Analysis of molecular mechanisms, cellular processes, and systemic modifications.
• Discussion of the interplay between peripheral and central nervous system pathology.

Main Results:

• Alpha-synuclein pathology is present outside the central nervous system in Parkinson's disease.
• Peripheral nervous system involvement is evident from early, non-motor autonomic symptoms.
• Peripheral alpha-synuclein processes are concurrent players in PD development.

Conclusions:

• The peripheral nervous system is significantly involved in Parkinson's disease pathogenesis.
• Peripheral alpha-synuclein pathology offers insights into central nervous system changes.
• The periphery serves as an accessible window to understand PD's systemic nature.