A biomimetic sensor using neurotransmitter detection to decode odor perception by an olfactory network

Area of Science:

• Neuroscience
• Biotechnology
• Sensory Systems

Background:

• Mammalian olfactory perception is crucial for survival and social interactions.
• The olfactory bulb (OB) is the primary center for odor processing.
• The precise coding and transmission of olfactory information within the OB remain under investigation.

Purpose of the Study:

• To develop a biomimetic sensor for detecting neurotransmitters and decoding odor perception.
• To investigate the role of glutamate and GABA in olfactory information processing.
• To establish a novel platform for biosensing and drug screening in the olfactory system.

Main Methods:

• Primary OB neurons were cultured on a microelectrode array (MEA) chip.
• Extracellular electrical activities of neurons were recorded.
• Responses to varying concentrations of glutamate and GABA were analyzed using statistical and cross-correlation methods.

Main Results:

• The biomimetic sensor detected glutamate and GABA with lower limits of detection at 100 nM and 50 nM, respectively.
• Concentration-dependent neuronal responses and network transmission modulation were observed.
• Neurotransmitter-induced response tolerance and neurotoxicity were identified at excessive concentrations.

Conclusions:

• The developed biomimetic sensor effectively detects trace neurotransmitters and decodes olfactory information in vitro.
• This technology provides a new tool for understanding olfactory coding mechanisms.
• The sensor platform is suitable for screening drug effects on olfactory system physiology.