The MNK-SYNGAP1 axis in specific learning disorder: gene expression pattern and new perspectives

Area of Science:

• Neuroscience
• Genetics
• Developmental Biology

Background:

• Synaptic Ras GTPase Activating Protein 1 (SYNGAP1) regulates synaptic plasticity and learning, and its deficiency is linked to neurodevelopmental disorders.
• The MAPK/ERK pathway is vital for learning and memory, with dysregulation associated with neurological conditions. MNK1/2 interacts with SYNGAP1 in synaptic signaling.

Purpose of the Study:

• To investigate the expression levels of MNK1, MNK2, SYNGAP1 genes, and SYNGAP1-AS1 lncRNA in children with Specific Learning Disorder (SLD).
• To explore the role of these genes in synaptic plasticity and cognitive function for insights into SLD's molecular mechanisms.

Main Methods:

• Quantitative polymerase chain reaction (qPCR) was used to measure gene expression levels in blood samples.
• The study included 38 children with SLD and 35 healthy controls, aged 6 to 16.
• Statistical analysis compared gene expression between groups and within SLD subgroups.

Main Results:

• MNK1 and SYNGAP1 gene expression were significantly upregulated in children with SLD compared to controls (8.33-fold and 16.52-fold increase, respectively; p < 0.001).
• lncSYNGAP1-AS1 showed a 26.58-fold increase, and MNK2 was downregulated by 2.2-fold, but these changes were not statistically significant.
• No significant differences in gene expression were found based on sex or SLD severity.

Conclusions:

• The upregulation of MNK1 and SYNGAP1 in children with SLD indicates their involvement in neurodevelopmental pathways crucial for learning and memory.
• These findings lay the groundwork for future research into the molecular basis of SLD and potential therapeutic targets.