Insertable NO/CO Microsensors Recording Gaseous Vasomodulators Reflecting Differential Neuronal Activation Level with Respect to Seizure Focus

Yejin Ha, Youngmi Lee, Minah Suh

Research output: Contribution to journalArticlepeer-review

Abstract

Nitric oxide (NO) and carbon monoxide (CO) are important signaling molecules shaping vasomodulation. This paper reports simultaneous in vivo monitoring of NO, CO and dendritic summation of action potential at three different cortical regions: seizure focus and two additional places, vertically and horizontally separated by 1.2 mm from the seizure focus, during epileptic seizure induced by 4-aminopyrindine injection. An amperometric dual microsensor having a high spatiotemporal resolution monitored fast and dynamic changes of NO and CO, and neural changes were recorded with a glass pipet electrode for local field potential (LFP). At all three locations, onsets and offsets of NO and CO changes well synchronized with fast LFP changes, while the patterns and concentrations of NO and CO changes were varied depending on the sensing locations. The insertable NO/CO dual microsensor was successful to measure intimately linked NO and CO in acute seizure events with high sensitivity, selectivity, and spatiotemporal resolution.

Original languageEnglish
Pages (from-to)1853-1858
Number of pages6
JournalACS Chemical Neuroscience
Volume8
Issue number9
DOIs
StatePublished - 20 Sep 2017

Keywords

  • amperometric sensor
  • carbon monoxide
  • epileptic seizure
  • local field potential
  • Nitric oxide

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