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Novel Approach for Quantifying Olfactory Neuron Populations With PET Imaging

by Dr. Trupti Shirole on January 26, 2017 at 5:37 PM
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 Novel Approach for Quantifying Olfactory Neuron Populations With PET Imaging

In Alzheimer's disease and Parkinson's disease, loss of the sense of smell often precedes classical symptoms of cognitive or motor dysfunction. Therefore, a technique that is able to non-invasively quantify the olfactory neuron population could provide important insights related to the diagnosis and progression of neurodevelopmental and neurodegenerative diseases.

Olfactory neurons in the nasal cavity are the primary source of our sense of smell. Unlike many types of neurons, olfactory neurons are continuously generated throughout the adult lifespan.

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This uniquely high rate of neuronal birth and death makes olfactory neurons particularly sensitive to the detrimental effects of progressive neurodevelopmental and neurodegenerative disease.

In work published this week in the JCI, a team led by Jacob Hooker at Harvard Medical School assessed GV1-57, a radiotracer that specifically binds to mature olfactory sensory neurons, as an approach for quantifying neuronal populations with PET imaging.
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Using GV1-57, they were able to detect neuron generation during rodent postnatal development as well as neuron degeneration in rodent models of aging and neurodegenerative disease.

In an additional proof-of-concept experiment, they showed that GV1-57 maintained saturable binding in non-human primate nasal cavity, suggesting that this radiotracer may be useful for evaluating neurological disease in clinical settings.

Source: Eurekalert
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