Exposure to Radiofrequency Induces Synaptic Dysfunction in Cortical Neurons Causing Learning and Memory Alteration in...

Area of Science:

• Neuroscience
• Environmental Health
• Developmental Biology

Background:

• Widespread use of wireless devices leads to unavoidable radiofrequency electromagnetic fields (RF-EMF) exposure.
• Children's increasing exposure to RF-EMF is largely due to mobile phone usage.
• Understanding the impact of RF-EMF on developing nervous systems is crucial.

Purpose of the Study:

• To investigate the effects of 1850 MHz RF-EMF exposure on cortical neurons in mice at postnatal day 28.
• To assess the impact of RF-EMF on synaptic structure, gene expression, and cognitive function.
• To determine potential risks associated with childhood RF-EMF exposure.

Main Methods:

• Mice at postnatal day 28 were exposed to 1850 MHz RF-EMF (4.0 W/kg) daily for 4 weeks.
• Evaluated dendritic spine density, postsynaptic density 95 puncta, and neurite outgrowth.
• Analyzed gene expression related to synapse formation and conducted behavioral tests (Morris water maze).

Main Results:

• Significant reduction in mushroom-shaped dendritic spines in the prefrontal cortex after 4 weeks of exposure.
• Decreased postsynaptic density 95 puncta and inhibited neurite outgrowth with prolonged (9 days) RF-EMF exposure.
• Reduced expression of synapse formation genes and altered spatial learning and memory in exposed mice.

Conclusions:

• Childhood RF-EMF exposure can disrupt synaptic function in the developing cerebral cortex.
• This disruption may affect nervous system development and potentially impact long-term cognitive abilities.
• Findings highlight the need for further research into the neurodevelopmental effects of RF-EMF exposure.