Roles of Postnatal Transient Connectivity in the Development of Fragile X Syndrome

A $100,000 FRAXA research grant awarded to Gabrielle Pouchelon, PhD, and Dimitri Dumontier, PhD, at Cold Spring Harbor Laboratory fuels groundbreaking research on Fragile X syndrome. Their work focuses on understanding sensory sensitivities and developing a noninvasive screening method, a potential game-changer for families affected by Fragile X syndrome.

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Targeting Cognitive Function in Fragile X Syndrome

It has long been assumed that the differences between males and females with Fragile X were simply a matter of degree, with males being more severely affected. But gender differences may be far reaching. This team is working to understand imbalances in how the brain’s neurons transmit signals, with a focus on how differently males and females learn and experience anxiety. They are studying two neuronal pathways which are promising targets for treatment.

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Validating Novel Inhibitors of ERK Signalling to Treat Fragile X Syndrome

One promising treatment approach for Fragile X syndrome is to inhibit on a neuronal pathway, ERK. ERK inhibitors are also being studied as treatments for other disorders including autism.
This team has conducted pilot studies showing that ERK inhibitors are very effective in reversing signs of disease in Fragile X mice. With this grant from FRAXA they will take the next steps toward possible clinical trials of an ERK inhibitor for individuals who have Fragile X syndrome.

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Transcriptional Signatures Sensitive to Cognition-Improving Pharmacological Treatments in Fragile X Syndrome

The Fragile X field needs biomarkers to accurately measure the effects of potential treatments in both Fragile X mice and in humans. Dr. Ozaita and his team have found molecular features in the brain that can serve as an objective signature for the syndrome. They will use this tool to test cannabidiol and two other drugs in mice.

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Cannabinoids as a Treatment for Fragile X Syndrome

Many people with Fragile X syndrome are hyper-sensitive to sights and sounds, and Electroencephalography (EEG) studies show that there are abnormalities in brain circuits. EEG studies show similar changes in Fragile X mice. So the team will use EEG tests in mice to find which drugs best reduce hypersensitivity. They can then easily move on to human EEG-based clinical trials. What they learn will tell us much more about why people with Fragile X are hypersensitive – and which drugs could best help them.

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Inhibiting Nonsense – Mediated mRNA Decay: A Potential Treatment Approach for Fragile X

All cells have a kind of housecleaning service which sweeps away genetic errors. This is called nonsense-mediated mRNA decay (NMD). With a previous FRAXA grant, this team discovered runaway NMD in cells of Fragile X patients. It’s not yet known how this impacts people with Fragile X. With this grant, Dr. Maquat and Dr. Kurosaki will test drugs which can bring NMD back to normal levels.

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Pharmacotherapeutic Effects of Cannabidiol (CBD) in Fragile X syndrome (FXS) and Autism Spectrum disorder (ASD)

This study will test CBD (cannabidiol) treatment in male and female Fragile X mice to learn how and why it works and whether gender affects responses to CDB treatment. Along with clinical trials, this study will help us to understand and optimize the potential of CBD as a behavior-regulating treatment for Fragile X.

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