Biochemically functionalized probes for cell-type-specific targeting and recording in the brain.

Area of Science:

• Neuroscience
• Biomedical Engineering
• Materials Science

Background:

• Understanding neural circuitry requires selective targeting of specific cell types and neuron subtypes.
• Current brain-implantable electronics lack cell-type specificity, limiting their therapeutic potential.
• Minimizing off-target effects is crucial for developing effective electronic treatments for neurological disorders.

Purpose of the Study:

• To develop cell-type-specific brain-implantable electronics.
• To functionalize flexible mesh electronic probes with antibodies or peptides for targeted cell interaction.
• To demonstrate the potential for neuron-subtype-specific targeting and electrophysiology.

Main Methods:

• Functionalization of flexible mesh electronic probes with antibodies or peptides targeting specific cell markers.
• Histology studies to assess the selective association of cells with functionalized probe surfaces.
• In vivo chronic electrophysiology to record neural activity from targeted cell types.
• Development of probes targeting dopamine receptor 2 expressing neurons for subtype specificity.

Main Results:

• Functionalized probes demonstrated selective association with targeted neurons, astrocytes, and microglia.
• Off-target cell accumulation was minimal on functionalized probe surfaces.
• In vivo electrophysiology recordings confirmed selective targeting of specific cell types.
• Probes targeting dopamine receptor 2 expressing neurons showed potential for neuron-subtype-specific electrophysiology.

Conclusions:

• Functionalized flexible mesh electronic probes achieve cell-type specificity in the brain.
• This technology enables precise neural circuit modulation with minimized off-target effects.
• The approach holds promise for developing advanced, targeted electronic therapies for neurological conditions.