Measurement of α-Synuclein Dynamics in Vivo Using Microdialysis with a Novel Homogeneous Immunoassay

Youngsoo Kim, Lequn Geng, Ashley E. Lenhart, Jay Li, William T. Dauer, Robert T. Kennedy

Research output: Contribution to journalArticlepeer-review


Understanding the regulation of α-synuclein release could be important in better understanding Parkinson's disease development, progression, and treatment. Advances in such studies are hindered by technical challenges that limit the ability to monitor α-synuclein concentration in vivo. We developed a novel α-synuclein microdialysis method coupled with a specific and sensitive immunoassay that requires a small sample volume (1 μL). Using this method, basal α-synuclein level was estimated at 254 ± 78 pM in the striatum of freely moving mice. Additionally, we observed that potassium (75 mM) and nicotine (0.5 mg/kg) administration significantly increased α-synuclein in dialysates. These results provide evidence that the methods we report here can be useful to investigate the physiological roles of α-synuclein and support the idea that α-synuclein is secreted to the extracellular space in a neuronal activity-dependent manner.

Original languageEnglish (US)
JournalACS Chemical Neuroscience
StateAccepted/In press - 2022
Externally publishedYes


  • A53T
  • AlphaLISA
  • alphα-synuclein
  • microdialysis
  • nicotine
  • Parkinson's disease

ASJC Scopus subject areas

  • Biochemistry
  • Physiology
  • Cognitive Neuroscience
  • Cell Biology


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