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Neurodevelopmental disorders caused by variants in TRPM3.

Robbe Roelens1, Ana Nogueira Freitas Peigneur2, Thomas Voets2

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Summary

Developmental and epileptic encephalopathies (DEE) are brain disorders causing epilepsy and intellectual disability (ID). Gain-of-function variations in the TRPM3 ion channel gene are now understood to cause a subset of these complex neurodevelopmental conditions.

Keywords:
DEENeurodevelopmental disordersTRP channelTRPM3 variants

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Area of Science:

  • Neuroscience
  • Genetics
  • Developmental Biology

Background:

  • Developmental and epileptic encephalopathies (DEE) encompass a diverse group of brain disorders.
  • Epilepsy and intellectual disability (ID) are hallmark comorbidities of DEE.
  • Genetic factors, including rare variants in neuronal protein genes, are implicated in approximately 25% of DEE cases.

Purpose of the Study:

  • To review the role of the Transient Receptor Potential Melastatin 3 (TRPM3) ion channel in a specific subgroup of DEE patients.
  • To elucidate the link between TRPM3 channel dysfunction and dominant neurodevelopmental disorders.

Main Methods:

  • Literature review of genetic studies in DEE.
  • Analysis of recent data on TRPM3 ion channel function.
  • Focus on gain-of-function variants in the TRPM3 gene.

Main Results:

  • Variations in the TRPM3 gene are identified in a subset of DEE patients.
  • Gain-of-function activity of the TRPM3 ion channel is associated with DEE.
  • TRPM3 channel dysfunction contributes to a spectrum of dominant neurodevelopmental disorders.

Conclusions:

  • TRPM3 ion channel gain-of-function mutations are a significant cause of a specific DEE spectrum.
  • Understanding TRPM3 channelopathies offers insights into DEE pathogenesis.
  • Further research into TRPM3 is crucial for diagnosing and treating these neurodevelopmental disorders.