Targeting Serotonin 1a Receptors to Reverse Neurobehavioral Phenotypes

Neurolixis’ new drug targets serotonin 1A receptors, showing promise in preclinical studies for Fragile X syndrome, funded by a FRAXA grant for future clinical trials.

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mRNA Therapy for Fragile X Syndrome

Dr. Kathryn Whitehead helped develop the science behind the COVID-19 vaccines. Her team adapted this technology to deliver the Fragile X mRNA to brain cells.

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Sigma-1 Receptor as a Therapeutic Target for Fragile X Syndrome

Researchers will test sigma-1 receptor drugs—like fluvoxamine, which activates this pathway—to see if they can correct Fragile X brain cell abnormalities.

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Targeting Serotonin 1A Receptors in Fmr1 Knockout Mice

Boosting serotonin 1A receptors may reduce excess brain activity in Fragile X. This study will test serotonin-1A–targeting compounds in mice to guide future treatments.

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

This team is defining Fragile X “molecular signatures” to use as biomarkers. They’ll test CBD and other drugs in mice and compare findings to human brain data.

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Characterization and Modulation of microRNAs in Fragile X Syndrome

MicroRNAs are disrupted in Fragile X; the team will work to understand this and explore ways to correct it with drugs which directly target microRNAs.

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Banerjee team at College of Staten Island

Correcting Fragile X Syndrome Deficits by Targeting Neonatal PKCε Signaling in the Brain

Enhancing PKCε in early development normalized oxytocin, AMPAR signaling, and adult behavior in Fragile X mice, highlighting PKCε as a promising therapeutic target.

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Characterization of a Novel CYFIP1 – Derived Peptidomimetic Restoring the Dysregulated mRNAs Translation: Toward An Innovative Therapeutic Strategy for FXS

This team is designing tiny “peptidomimetic” drugs that mimic FMRP’s function to rebalance protein production in the brain, aiming to treat Fragile X at its source.

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Cannabinoids as a Treatment for Fragile X Syndrome

This team uses EEG to study sensory hypersensitivity in Fragile X. By testing drugs in mice, they aim to find treatments that calm brain overactivity.

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

This team previously discovered runaway nonsense-mediated mRNA decay (NMD) in cells of Fragile X patients. They will now test drugs to reduce NMD.

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Link Between Lipid Profile, eCBome System and Gut Microbiome in Fragile X Syndrome

Why does obesity challenge so many people with Fragile X? Dr. Caku’s team has found that Fragile X syndrome causes changes in the tiny organisms that live in our gut.

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Preclinical Testing of High Fat/Low Carb Diets in Fragile X Mice and Cells

Dr. Cara Westmark’s team will use mice to determine if palatable Atkins-type diets can improve sleep and boost learning skills for those with Fragile X syndrome.

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

This study tested 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.

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Cellular-Specific Therapeutic Targeting of Inhibitory Circuits in Fragile X Syndrome

The team studied how inhibitory brain circuits malfunction in Fragile X and tested ways to restore balance by targeting mGluR and endocannabinoid signaling.

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Screening Combinatorial Pharmacological Therapies for Fragile X Syndrome

Screening Combinatorial Pharmacological Therapies for Fragile X Syndrome

This Stanford University team assessed combinatorial drug treatments to correct a broad spectrum of deficits observed in Fragile X syndrome. Results published.

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Dr. Bettio, Dr. Christie, Dr. Thacker

Targeting Adiponectin to Treat Fragile X Syndrome

Boosting adiponectin, a hormone that regulates metabolism, may improve cognition and behavior in Fragile X. Early results suggest it can restore brain plasticity.

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Targeting Mitochondria

Targeting Mitochondria in Human Fragile X Syndrome Neurons

Fragile X brain cells have fewer, smaller mitochondria. This team tested mitochondria-boosting drugs that improved symptoms in mice to see if they can help humans.

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Nazim Kourdougli and Carlos Portera-Cailleau

Correcting Sensory Processing in Fragile X Mice by Modulating Kv3.1

FRAXA funded UCLA research on a Kv3.1-targeting drug to ease sensory issues in Fragile X. This work built on Yale-led work now also being pursued by Autifony Therapeutics.

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Stephanie Barnes, PhD

Enhancing NMDA Receptor Signaling to Treat Fragile X Syndrome

FRAXA-backed work revealed NMDA receptors may hold the key to correcting brain signaling in Fragile X, pointing to new treatment strategies.

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Screening 2,320 FDA-Approved Drugs for Potential Treatment of Fragile X

FRAXA funded a screen of 2,320 FDA-approved compounds in the Fragile X fly model to identify hits that improve memory and social behavior for advanced testing.

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kaczmarek-Hassar-Brown

Novel Modulators of Potassium Channels to Treat Fragile X

FRAXA-funded Yale research showed disrupted Kv3.1 and Slack potassium channels impair neuronal timing in Fragile X. Published findings support Kv3.1 as a treatment target.

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Antonella Borreca, PhD, and Alberto Martire, PhD

Coffee, Tea, and Chocolate: Adenosine Receptors in Fragile X

Could “caffeine-like” drugs help Fragile X? FRAXA funded research to test adenosine blockers, which may boost thinking and improve symptoms in Fragile X mice.

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Dr. Thomas Maurin and Dr. Barbara Bardoni, Fragile X researchers and co-authors of a 2025 review on PDE inhibitors published in Cell Reports Medicine.

Research Points to Drugs which Inhibit PDE to Treat Fragile X

FRAXA-funded work identified PDE enzymes as key targets in Fragile X, showing that PDE inhibitors can fix signaling and boost synaptic function. PDE4D trials are underway.

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Metformin and Aberrant Insulin Signaling in a Fragile X Mouse Model

FRAXA-funded research is revealing how insulin signaling is altered in Fragile X and whether lowering it, including with metformin, could ease symptoms.

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FRAXA Funded Research

Current Research Grants (38)