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Sulforaphane protects developing neural networks from VPA-induced synaptic alterations.

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Sulforaphane (SFN) activates the NRF2 pathway, increasing antioxidant gene expression and protecting against valproic acid (VPA)-induced neurodevelopmental damage. This study shows SFN can prevent oxidative stress and synaptic alterations, offering potential neuroprotection.

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Area of Science:

  • Neuroscience
  • Toxicology
  • Developmental Biology

Background:

  • Prenatal exposure to certain chemicals can disrupt brain development and lead to neurodevelopmental disorders by increasing oxidative stress.
  • Valproic acid (VPA) exposure during pregnancy is linked to autism spectrum disorders (ASD) due to induced oxidative stress and synaptic alterations.

Purpose of the Study:

  • To investigate if activating cellular antioxidant mechanisms can prevent VPA-induced synaptic alterations in developing neural networks.
  • To determine the neuroprotective potential of sulforaphane (SFN), a potent activator of the NRF2 pathway, against VPA-induced neurotoxicity.

Main Methods:

  • Utilized VPA exposure to model chemically induced ASD in neurodevelopmental models.
  • Administered sulforaphane (SFN) to activate the nuclear factor erythroid 2-related factor 2 (NRF2) pathway.
  • Assessed gene expression of antioxidant and synapse-related genes, and measured synapse formation and neural activity in response to VPA and SFN treatments.

Main Results:

  • SFN activated NRF2, upregulating antioxidant gene expression and mitigating oxidative stress caused by VPA.
  • SFN treatment prevented VPA-induced reductions in synapse formation and normalized neural activity in mouse cortical neurons.
  • SFN enhanced the expression of genes crucial for synapse formation, indicating a protective effect on neural network development.

Conclusions:

  • SFN demonstrates significant neuroprotective capabilities against VPA-induced developmental toxicity by enhancing antioxidant defenses and promoting synaptic development.
  • The findings highlight SFN's potential to safeguard developing neural networks during critical windows of synapse formation.
  • Molecular signatures of SFN-mediated neuroprotection may offer insights for developing strategies against other environmental toxicants impacting neurodevelopment.