Molecular mechanisms: Enzyme blockers help Fragile X mice

Dr. Jope won the 2013 FRAXA Pioneer Award for showing that lithium and other GSK-3–blocking drugs can reverse cognitive deficits in Fragile X mice.

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Elizabeth Higgins Clark

This Is My Brother, speech by Elizabeth Clark at FRAXA’s Fall X Ball

At FRAXA’s 11th Annual Fall X Ball, Elizabeth Higgins Clark spoke with humor and heart about her brother David, who has Fragile X.

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Fragile X Syndrome Protein Linked to Breast Cancer Progression

Dr. Claudia Bagni’s team discovered that FMRP can act as a master switch in aggressive breast cancer, controlling proteins that drive invasion and metastasis.

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Social Behavior as an Outcome Measure for Fragile X Clinical Trials

FRAXA funding helped identify reliable social behavior tests in Fragile X mice and showed an mGluR5 treatment could improve sociability, guiding future trials.

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Translation-Independent Functions of FMRP in Excitability, Synaptic Transmission and Plasticity

Study pinpointed presynaptic calcium dysfunction as the driver of STP defects in Fragile X, and BK channel activation restored normal synaptic signaling.

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Glycogen Synthase Kinase-3 (GSK3), Lithium and Fragile X

Dr. Jope found that lithium (at usual therapeutic doses) and investigational GSK3 inhibitors can reverse a number of cognitive deficits in FMR1 knockout mice.

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Tori Shaeffer

Development of a Novel GABA-A Agonist in Fragile X Syndrome

FRAXA funded analysis of a selective GABA-A drug for Fragile X, leading to a clinical trial at Cincinnati Children’s to test this potential treatment.

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klann lab

The mTOR Pathway in Fragile X Syndrome

FRAXA-funded research showed that blocking S6K1 in Fragile X mice improves social, behavioral, and physical symptoms.

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Kendal Broadie

Matrix Metalloproteinase Therapeutic Treatments for Fragile X Syndrome

Dr. Broadie showed that MMP enzymes disrupt synapse development in Fragile X. MMP inhibitors (e.g. minocycline) improved connectivity and behavior in fruit flies.

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IGF-1

Fragile X Treatment Strategy Emerges from FRAXA Research: IGF-1

Neuren’s Trofinetide, part of a promising IGF-1 drug class, showed standout results in Fragile X mice—outperforming Rett syndrome models.

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Cote family

Makenzie Cote’s Page

In honor of Makenzie, diagnosed with Fragile X at 16 months, our family crafts and sells handmade items to support FRAXA research

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Dr. Emily Osterweil

Lovastatin Discovery in Fragile X Mice Leads FRAXA to Fund Clinical Trials

FRAXA honored Dr. Emily Osterweil for discovering that lovastatin can correct key Fragile X abnormalities. Her findings were published in Neuron.

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Justin Cowan, PhD

Treatment of Fragile X Syndrome via Dopamine Enhancers and Glutamate Inhibitors

In Fragile X mice, low dopamine signaling and excessive glutamate activity were targeted with dual therapy: dopamine enhancers plus glutamate inhibitors.

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Endocannabinoid Mediated Synaptic Plasticity in Fragile X Mice

FRAXA-funded studies found faulty endocannabinoid signaling in Fragile X brain circuits for reward and emotion, and boosting 2-AG restored normal function.

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Effects of minocycline on vocal production and auditory processing in a mouse model of Fragile X

With FRAXA funding, Dr. Khaleel Razak and Dr. Iryna Ethell explored robust biomarkers relevant to the FXS and the efficacy of minocycline treatment.

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Phase 2b Clinical Trial of Arbaclofen in Autism Has Disappointing Results

The Phase 2b arbaclofen trial in autism didn’t improve social withdrawal, but did show progress on the Clinical Global Impression of Severity scale.

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Anita Bhattacharyya, PhD

Developing IPS cells to Screen Drugs which can Reactivate the FMR1 Gene

This project developed human stem cell and mouse models to test FMR1 gene reactivation in the brain, advancing future gene therapy strategies for Fragile X.

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Kimberly Huber, Ph.D., FRAXA Investigator

Targeting mGluR-LTD to Treat Fragile X Syndrome

With FRAXA support, Dr. Kimberly Huber uncovered how mGluR signaling contributes to Fragile X, laying the foundation for major clinical advances.

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Preclinical Evaluation of Serotonin Receptor Agonists as Novel Pharmacological Tools in Fragile X Syndrome

With FRAXA funding the team found that activating 5-HT7 receptors reversed excess mGluR-LTD in Fragile X mice, pointing to a new route to fix synapses.

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Small Rho GTPases, a Potential Therapeutic Target for Fragile X Syndrome

Dr. MariVi Tejada from the University of Houston tested several potential therapeutic compounds in an attempt to rescue function in the mouse model of Fragile X.

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Kimberly Huber, Ph.D., FRAXA Investigator

Evaluation of CamKII Dependent Regulation of mGluR5-Homer Scaffolds as a Potential Therapeutic for Fragile X Syndrome

Disrupted mGluR5–Homer scaffolding in Fragile X is linked to excess CaMKII activity. Restoring this interaction could rebalance signaling and improve symptoms.

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Clinical Trials FAQ ← Frequently Asked Questions

Wondering which Fragile X trial is right? Eligibility varies, so most families qualify for just one. Talk with your closest clinic to find the best fit.

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Darren’s Smile

Darren’s story reminds us how loved he was and how fragile life can be. His father’s memoir honors his life and raises Fragile X awareness.

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FRAXA Progress and Future Plans

Huge momentum in Fragile X research: major results released, widespread media attention, and Phase III trials moving toward possible treatments.

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FRAXA Funded Research

Current Research Grants (41)