This episode features Dr. Kole, who shares fascinating insights into the world of myelination in parvalbumin-expressing (PV+) basket cells, a type of fast-spiking inhibitory interneurons vital for regulating local circuit activity and oscillations.

PV+ axons are often myelinated, but the electrical and metabolic implications of interneuron myelination remain an open question in neuroscience. To delve deeper into this, Dr. Kole and his team developed viral constructs for cell type-specific investigation of mitochondria using genetically encoded fluorescent probes.

Their investigations revealed a selective clustering of mitochondria to myelinated segments of PV+ basket cells. Interestingly, while the mitochondrial density increases in excitatory axons, cuprizone-induced demyelination erased mitochondrial clustering in PV+ axons.

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