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Related Experiment Videos

A chemical-modification approach to the olfactory code. Studies with a thiol-specific reagent.

A Menevse, G Dodd, T M Poynder

    The Biochemical Journal
    |December 15, 1978
    PubMed
    Summary

    Thiol-specific reagents like mersalyl alter electro-olfactogram (E.O.G.) responses in frogs. Specific odorants protect E.O.G. signals, suggesting chemical modification methods can reveal olfactory coding mechanisms.

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    Area of Science:

    • Neuroscience
    • Olfactory receptor research
    • Chemical senses

    Background:

    • The electro-olfactogram (E.O.G.) measures olfactory receptor cell responses to odorants.
    • Thiol groups in proteins are crucial for cellular function and can be targeted by specific reagents.

    Purpose of the Study:

    • To investigate the role of thiol groups in olfactory signal transduction using thiol-specific reagents.
    • To explore how chemical modification of olfactory receptors affects odorant responses.
    • To elucidate the olfactory code at the primary neuron level.

    Main Methods:

    • Studied the effects of mersalyl, a thiol-specific reagent, on frog olfactory mucosa E.O.G. responses.
    • Assessed the impact of mersalyl concentration and partial reversal with dithiothreitol.

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  • Investigated differential protection of E.O.G. responses by pre-treating with pentyl acetate.

    • Main Results:

    • Mersalyl rapidly decreased E.O.G. amplitude in a concentration-dependent manner.
    • Dithiothreitol partially reversed mersalyl's effects.
    • Pentyl acetate protected E.O.G. responses to certain odorants but not others, indicating specific interactions.

    Conclusions:

    • Chemical modification of olfactory receptors by thiol-specific reagents can alter odorant perception.
    • Differential protection effects suggest specific odorant-receptor interactions.
    • Chemical-modification methods hold promise for deciphering olfactory coding mechanisms.