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Experience-dependent DNA methylation regulates plasticity in the developing visual cortex.

Paola Tognini1, Debora Napoli2, Jonida Tola1

  • 1Institute of Neuroscience CNR, Pisa, Italy.

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Summary
This summary is machine-generated.

Visual experience regulates DNA methylation in the developing brain. Inhibiting DNA methyltransferase (DNMT) blocked effects of monocular deprivation, impacting ocular dominance plasticity in mice.

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Area of Science:

  • Neuroscience
  • Epigenetics
  • Developmental Biology

Background:

  • DNA methylation is a key epigenetic mechanism regulating gene transcription, particularly in neurons.
  • Epigenetic modifications are crucial for neural plasticity and development, including in the visual cortex.

Purpose of the Study:

  • To investigate how visual experience regulates DNA methylation in the mouse visual cortex.
  • To determine the role of DNA methylation in ocular dominance plasticity during visual development.

Main Methods:

  • Analysis of DNA methylation and hydroxymethylation in specific genes within the visual cortex of mice.
  • Monocular deprivation as a method to induce changes in visual experience.
  • Pharmacological inhibition of DNA methyltransferase (DNMT) to assess its functional role.

Main Results:

  • Monocular deprivation altered the expression of factors controlling DNA methylation.
  • Opposite effects on DNA methylation and hydroxymethylation were observed in plasticity-related genes.
  • DNMT inhibition blocked molecular and functional consequences of monocular deprivation, partially reversing transcriptional changes.

Conclusions:

  • Visual experience dynamically regulates DNA methylation in the developing visual cortex.
  • DNA methylation plays a critical role in mediating ocular dominance plasticity.
  • Targeting DNMT offers a potential strategy to modulate visual cortex plasticity.