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Salivary caffeine in Parkinson's disease
Giorgio Leodori1,2, Maria Ilenia De Bartolo1, Daniele Belvisi1,2
1IRCCS NEUROMED, Via Atinense, 18, 86077, Pozzilli, Italy.
Scientific Reports
|May 11, 2021
Summary
Salivary caffeine levels are decreased in moderate/advanced Parkinson's disease (PD) patients, correlating with disease severity. Caffeine absorption and metabolism remain normal in PD, suggesting salivary caffeine may indicate disease progression.
Area of Science:
- Neuroscience
- Pharmacology
- Biomarker Research
Background:
- Parkinson's disease (PD) is a progressive neurodegenerative disorder.
- Investigating potential biomarkers for PD diagnosis and progression is crucial.
- Salivary caffeine levels have not been extensively studied in relation to PD.
Purpose of the Study:
- To investigate salivary caffeine content, absorption, and metabolism in Parkinson's disease (PD) patients.
- To determine if salivary caffeine can serve as a biomarker for PD.
- To correlate salivary caffeine levels with PD severity and clinical features.
Main Methods:
- Salivary caffeine and paraxanthine levels were measured in 98 PD patients and 92 healthy controls before and after oral caffeine intake.
- Caffeine absorption and metabolism were quantified.
- Clinical assessments included the Movement Disorder Society Unified Parkinson's Disease Rating Scale (MDS-UPDRS) part III and Hoehn & Yahr staging.
Main Results:
- Salivary caffeine levels were decreased in moderate/advanced PD patients but normal in early/de-novo PD.
- Caffeine absorption and metabolism were not significantly different between PD patients and controls.
- Decreased salivary caffeine levels correlated with higher disease severity, longer duration, and motor complications.
Conclusions:
- Salivary caffeine levels decrease with Parkinson's disease progression.
- Salivary caffeine may serve as a potential, non-invasive biomarker for PD severity.
- Further research is warranted to validate salivary caffeine as a PD biomarker.
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