Infectious Microorganisms Seen as Etiologic Agents in Parkinson's Disease

Area of Science:

• Neurology
• Infectious Diseases
• Microbiology

Background:

• Epidemiological and scientific evidence suggests infections as a potential risk factor for parkinsonism and Parkinson's disease (PD).
• The specific infectious agents and the latency period between infection and PD onset remain largely unclear.
• Understanding the role of infections is crucial for identifying etiological factors and developing targeted treatments for PD.

Purpose of the Study:

• To review and examine the evidence linking infectious microorganisms to the development of Parkinson's disease.
• To explore the potential pathophysiological mechanisms through which infections might initiate or exacerbate PD.
• To highlight the need for further research into the etiological role of infections in PD.

Main Methods:

• Comprehensive literature review of epidemiological and fundamental scientific studies.
• Analysis of evidence supporting the involvement of viral and bacterial infections in PD.
• Examination of proposed pathophysiological pathways, including gut dysbiosis, neuroinflammation, and alpha-synuclein aggregation.

Main Results:

• Persistent viral and bacterial infections are suggested as potential causes of Parkinson's disease.
• Infections may initiate a cascade involving gut microbiota dysbiosis, glial cell activation, neuroinflammation, and alpha-synuclein accumulation.
• These processes can trigger, worsen, and contribute to the progression of Parkinson's disease.

Conclusions:

• Infections present an intriguing hypothesis for the etiology of Parkinson's disease.
• Further investigation is required to ascertain whether infections are a primary cause of PD or if individuals with PD exhibit heightened susceptibility to infectious agents.
• Clarifying the role of infections necessitates continued research into PD pathophysiology and etiology.