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ISL1 is necessary for auditory neuron development and contributes toward tonotopic organization

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378041%3A_____%2F22%3A00568863" target="_blank" >RIV/68378041:_____/22:00568863 - isvavai.cz</a>

  • Alternative codes found

    RIV/86652036:_____/22:00568863 RIV/68378050:_____/22:00568863

  • Result on the web

    <a href="https://www.pnas.org/doi/full/10.1073/pnas.2207433119" target="_blank" >https://www.pnas.org/doi/full/10.1073/pnas.2207433119</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1073/pnas.2207433119" target="_blank" >10.1073/pnas.2207433119</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    ISL1 is necessary for auditory neuron development and contributes toward tonotopic organization

  • Original language description

    A cardinal feature of the auditory pathway is frequency selectivity, represented in a tono-topic map from the cochlea to the cortex. The molecular determinants of the auditory frequency map are unknown. Here, we discovered that the transcription factor ISL1 reg-ulates the molecular and cellular features of auditory neurons, including the formation of the spiral ganglion and peripheral and central processes that shape the tonotopic rep-resentation of the auditory map. We selectively knocked out Isl1 in auditory neurons using Neurod1Cre strategies. In the absence of Isl1, spiral ganglion neurons migrate into the central cochlea and beyond, and the cochlear wiring is profoundly reduced and dis-rupted. The central axons of Isl1 mutants lose their topographic projections and segrega-tion at the cochlear nucleus. Transcriptome analysis of spiral ganglion neurons shows that Isl1 regulates neurogenesis, axonogenesis, migration, neurotransmission-related machinery, and synaptic communication patterns. We show that peripheral disorganiza-tion in the cochlea affects the physiological properties of hearing in the midbrain and auditory behavior. Surprisingly, auditory processing features are preserved despite the significant hearing impairment, revealing central auditory pathway resilience and plastic-ity in Isl1 mutant mice. Mutant mice have a reduced acoustic startle reflex, altered prepulse inhibition, and characteristics of compensatory neural hyperactivity centrally. Our findings show that ISL1 is one of the obligatory factors required to sculpt auditory struc-tural and functional tonotopic maps. Still, upon Isl1 deletion, the ensuing central plastic-ity of the auditory pathway does not suffice to overcome developmentally induced peripheral dysfunction of the cochlea.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10605 - Developmental biology

Result continuities

  • Project

    Result was created during the realization of more than one project. More information in the Projects tab.

  • Continuities

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2022

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Proceedings of the National Academy of Sciences of the United States of America

  • ISSN

    0027-8424

  • e-ISSN

  • Volume of the periodical

    119

  • Issue of the periodical within the volume

    37

  • Country of publishing house

    US - UNITED STATES

  • Number of pages

    12

  • Pages from-to

    e2207433119

  • UT code for WoS article

    000895561900005

  • EID of the result in the Scopus database

    2-s2.0-85139290572