Glycine-modulating Slc6a20a-ASO restores NMDA receptor function in SHANK2 and SHANK3-mutant mice and cortical organoids

A significant breakthrough in neurobiology has been published today in *Nature Communications*, revealing a novel therapeutic strategy for conditions linked to critical neurodevelopmental genes. Researchers have successfully used a targeted genetic approach to restore essential brain function in models of SHANK2 and SHANK3 gene mutations, offering a new beacon of hope for understanding and potentially treating complex neurological disorders.

Mutations in the SHANK2 and SHANK3 genes are well-established culprits behind various neurodevelopmental conditions, including autism spectrum disorder and intellectual disability. These genetic alterations can profoundly disrupt the intricate signaling pathways within the brain, particularly affecting the function of NMDA receptors—key components vital for learning, memory, and synaptic plasticity. Such dysfunction often manifests as severe behavioral impairments and observable molecular deficits at the synaptic level.

The innovative strategy centers on antisense oligonucleotides (ASOs) specifically designed to target the glycine transporter SLC6A20. By modulating the activity of this transporter, the ASOs effectively increase the availability of glycine, an amino acid that plays a crucial role in regulating NMDA receptor function. This precise intervention aims to correct the underlying imbalance caused by the SHANK gene mutations, thereby reactivating proper neural communication.

Remarkably, the study demonstrated that this glycine-modulating ASO not only restored NMDA receptor function but also significantly rescued both behavioral and synaptic phospho-proteomic deficits in SHANK2- and SHANK3-mutant mice. Further underscoring its translational potential, the treatment also showed promising results in human SHANK2/SHANK3 cortical organoids – miniature brain models grown in the lab – indicating a profound impact across different biological systems and moving closer to human relevance.

Conclusion

This research marks a pivotal step in the quest for targeted therapies for neurodevelopmental disorders, opening new avenues for drug discovery that could address the root causes of these challenging conditions.

Source: Original Article

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