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Nasal neuron PET imaging quantifies neuron generation and degeneration.

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    A new PET radiotracer, [11C]GV1-57, can quantify olfactory sensory neurons (OSNs) in vivo. This tool aids in understanding olfactory dysfunction in neurodegenerative diseases and mortality risk.

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    Area of Science:

    • Neuroscience
    • Medical Imaging
    • Cell Biology

    Background:

    • Olfactory dysfunction is linked to neurodegenerative diseases and mortality.
    • Current methods assess brain pathways, not primary odor detection by olfactory sensory neurons (OSNs).
    • OSNs are replenished by adult neurogenesis, offering insights into neurological health.

    Purpose of the Study:

    • To evaluate [11C]GV1-57, a PET radiotracer, for quantifying mature OSNs in vivo.
    • To assess the tracer's ability to monitor OSN population dynamics and disease-related changes.

    Main Methods:

    • Developed and tested the PET radiotracer [11C]GV1-57.
    • Monitored OSN population dynamics in rodents during development, aging, and after injury.
    • Evaluated [18F]GV1-57 in nonhuman primates.

    Main Results:

    • [11C]GV1-57 successfully quantified OSN populations in rodents.
    • The tracer detected OSN generation during development and aging-related decline.
    • It measured regeneration after injury and early deficits in a neurodegenerative model.
    • [18F]GV1-57 showed potential for primate nasal epithelium imaging.

    Conclusions:

    • [11C]GV1-57 is a promising tool for in vivo quantification of OSNs.
    • This tracer can monitor OSN dynamics in aging, disease, and regeneration.
    • GV1-57 has translational potential for neurological conditions and therapeutic monitoring.