The Endocannabinoid System and Fragile X Syndrome
This project will examine how CBD and other drugs targeting the endocannabinoid system affect hyperexcitable Fragile X neurons to identify new treatment strategies.
fNIRS to Measure Treatment Response in Young Children with Fragile X
The team tested functional near-infrared spectroscopy (fNIRS). fNIRS uses light sources and sensors on the scalp to build a heat map of the brain in action.
FX-Learn Clinical Trial for Children with Fragile X
Thirteen centers across the US enrolled young children with Fragile X in a large-scale clinical trial of Novartis AFQ056, an mGluR5 blocker for Fragile X which failed in adult human trials.
Correcting the Brain’s Emotional Memory Center
FRAXA Investigator Dr. Sumatra Chattarji investigated the synaptic basis of deficient conditioned fear and its reversal in Fragile X syndrome rats. Results published.
Drug Tolerance in MGluR5 Clinical Trials – Dr Patrick McCamphill 1:1 with FRAXA
We suspected that clinical trials of mGluR5 blockers from Novartis and Roche failed because the drug triggered tolerance. Dr. Patrick does find tolerance, and is looking for ways to overcome it.
Parkinson’s Therapy May Hold Promise for Fragile X
A study funded by FRAXA in Italy has encouraging results for people with Fragile X: drugs that block adenosine receptors (A2A) reversed signs of Fragile X in a mouse model.
Bryostatin-1 in Long-term Use Seen to Arrest Fragile X Symptoms in Mouse Model
Long-term, but not short-term, treatment with bryostatin-1 arrested some behavioral and cognitive symptoms in a mouse model of Fragile X.
Positive Results Reported in Phase II Fragile X Clinical Trial of PDE4D Inhibitor Zatolmilast from Tetra Therapeutics
Tetra Therapeutics announces the first unequivocally positive phase 2 clinical trial in Fragile X syndrome. The results do not depend on carving out a subset of patients or post hoc analysis.
Auditory System Dysfunction and Drug Tolerance in the Fragile X Mouse
A $90K FRAXA grant will help uncover why Fragile X causes sound hypersensitivity and test ways to correct brain circuit dysfunction linked to auditory overload.
Scientists Find a New Way to Reverse Symptoms of Fragile X
MIT Professor Mark Bear and colleagues have identified a new target for Fragile X therapeutics: GSK3 alpha. Several FRAXA research teams previously identified GSK3 beta as a treatment target.
Results Reported: Using EEG Responses to Sound for Fragile X Drug Discovery
Jonathan Lovelace, a FRAXA funded Postdoc at UC Riverside, has made some exciting EEG findings over the past few years studying auditory hypersensitivity in mice and therapeutic drug treatments. A big obstacle in FXS research has been establishing reliable, unbiased, and translation relevant biomarkers that can be used to determine the effectiveness of therapies. One of the most important discoveries they have made is the striking similarity in EEG biomarkers between mice and humans.
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.
Pharmacological Tolerance in the Treatment of Fragile X Syndrome
FRAXA funded MIT work to probe tolerance to key Fragile X drugs, including mGluR5 inhibitors and arbaclofen, and to identify ways to sustain long-term treatment benefits.
Newly Discovered Regulatory Pathways in Fragile X
Studies at Yale University and elsewhere are showing that FMRP plays a significant role in the regulation of potassium channels. Looking forward, potassium channel opener drugs could rescue some symptoms of Fragile X in humans.
In Their Own Words: Reports From the International Fragile X Workshop
The 18th International Fragile X Workshop in Quebec was a great success, featuring more Fragile X research than ever before!
Combinatorial Drug Treatment in a Model of Fragile X Syndrome using Novel Biomarkers
University of California researchers Khaleel Razak, PhD, and Jonathan W. Lovelace, PhD, explored drug combinations to limit hypersensitivity to sounds in Fragile X mice.
Defining Subcellular Specificity of Metabotropic Glutamate Receptor (mGluR5) Antagonists
This study showed that selectively targeting mGluR5 receptors in specific neuronal compartments can correct distinct Fragile X synaptic defects, improving precision therapy.
Mechanisms of Tolerance to Chronic mGluR5 Inhibition
FRAXA supported research showing mGluR5 antagonist tolerance develops quickly in Fragile X models, guiding new strategies to prevent or overcome it.
Development of a High-Content Synapse Assay to Screen Therapeutics for Fragile X Syndrome
This work established a high-content synaptic imaging platform for Fragile X cells to test many candidate drugs for their ability to repair synapse structure and function.
New Fragile X Clinical Trial for Children Launching in June 2017
Elizabeth M. Berry-Kravis, MD, PhD, has launched a large-scale clinical trial to study effects of AFQ056, an mGluR5 blocker, on learning in young children with Fragile X syndrome.
Mark Bear’s Goal: Disease-Modifying Treatments for Fragile X
Mark Bear pioneered the mGluR theory of Fragile X, linking excess protein synthesis to symptoms and driving development of disease-modifying treatments now tested in clinical trials.
Kimberly Huber, PhD, Explores Hyperexcitability in Fragile X Syndrome
What causes hyperexcitability? Dr. Kimberly Huber seeks to understand how FMRP regulates connections between brain cells and the function of brain circuits.
Fragile X Treatment: New Research Directions
In the wake of negative results from several high-profile clinical trials in Fragile X, we find ourselves questioning many of our previous assumptions about the nature of this disorder. After all, understanding the basic pathology of disease is critical to development of new treatments — this is true across the board, in all branches of medicine.
Clinical Trials Outcome Measures
There is a critical need for reliable biomarkers and clinical outcome measures for Fragile X syndrome. Treatment trials depend on this.