Determination of alpha-synuclein concentration in human plasma using ELISA

Area of Science:

• Neuroscience
• Biochemistry
• Biomarker Discovery

Background:

• Alpha-synuclein is a nerve cell protein implicated in Parkinson's disease and dementia with Lewy bodies.
• Expression levels of alpha-synuclein correlate with the development of these neurodegenerative conditions.
• Plasma alpha-synuclein quantification is a potential biomarker for disease susceptibility.

Purpose of the Study:

• To quantitatively measure plasma alpha-synuclein levels in healthy individuals.
• To investigate the relationship between plasma alpha-synuclein concentration, age, and gender.
• To assess the utility of a novel enzyme-linked immunosorbent assay (ELISA) for alpha-synuclein measurement.

Main Methods:

• Quantitative measurement of alpha-synuclein in plasma samples from 44 healthy blood donors.
• Utilized a novel, quantitative enzyme-linked immunosorbent assay (ELISA).
• Analyzed plasma concentrations in relation to donor age and gender.

Main Results:

• The median plasma concentration of alpha-synuclein was 5.6 microg/L (range: 2.1-19.4 microg/L).
• A narrow distribution was observed, with 25th and 75th percentiles at 4.0 and 7.2 microg/L, respectively.
• No significant correlation was found between plasma alpha-synuclein levels and age or gender.

Conclusions:

• The consistent plasma alpha-synuclein concentration in healthy individuals suggests a stable baseline.
• The developed quantitative ELISA is sensitive and easy to use for measuring plasma alpha-synuclein.
• These findings support further investigation of plasma alpha-synuclein as a biomarker for neurodegenerative diseases.