Two people holding hands, symbolizing a research partnership.

Nospharma Announces Partnership with FRAXA to Test NOS-01 in Pre-Clinical Models of Fragile X

NOS-01 enters the FRAXA Drug Validation Initiative (FRAXA-DVI) for Fragile X mouse-model testing, generating data to guide development decisions.

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Group photo of Callum Cup IX participants gathered at Millburn High School during the annual charity soccer match supporting Fragile X research.

Callum Cup IX Brings Community Together, Raising $20,000 for Fragile X Research

Callum Cup IX brought the Millburn FC community together, raising $20,000 for the FRAXA Research Foundation in support of Fragile X research.

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FRAXA Drug Validation Initiative (FRAXA-DVI)

The FRAXA Drug Validation Initiative (FRAXA-DVI) provides speedy, cost-effective, objective preclinical testing to validate investigational and repurposed compounds for Fragile X.

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Dr. Gary Feldman, Principal Investigator for the MRM-3379 Phase 2 clinical trial at the Irvine, California site, standing with an individual with Fragile X syndrome.

Recruiting: Mirum Launches Clinical Trial of MRM-3379 for Fragile X Syndrome

Mirum’s MRM-3379 Phase 2 trial builds on FRAXA-funded PDE4D research and is now enrolling males ages 13–45 with Fragile X syndrome. View eligibility and study sites.

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Shionogi Shares Update on Zatolmilast Fragile X Clinical Trials

Shionogi shares an update on its zatolmilast Fragile X clinical trials, outlining progress in U.S. studies and next steps in data analysis and evaluation.

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FRAXA Q&A Webinar with Dr. Elizabeth Berry-Kravis on the Harmony RECONNECT Trial

Fragile X Research Q&A: Dr. Berry-Kravis on the RECONNECT Trial

Fragile X Research Q&A with Dr. Berry-Kravis on RECONNECT results, placebo effects, outcome measures, methylation, and research directions for families.

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RECONNECT Trial Results: ZYN002 Does Not Meet Primary Endpoint in Fragile X

Harmony Biosciences announced that the Phase 3 RECONNECT trial of ZYN002 in Fragile X syndrome failed to meet its primary endpoint.

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Fragile X Research Update: A Turning Point for Treatments and Curative Approaches

Fragile X research is at a turning point. FRAXA is funding ASO therapy and CRISPR-based gene reactivation to target the root cause of Fragile X.

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Shionogi’s EXPERIENCE Phase 3 Clinical Trial of Zatolmilast in Fragile X Syndrome

Learn more about Shionogi’s EXPERIENCE clinical trials for adults and adolescents with Fragile X syndrome, FRAXA’s role, and the open-label extension of these trials.

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Callum Cup VIII Scores $19,400 for Fragile X Research – A Milestone Event

Callum Cup VIII, Millburn FC’s annual charity match, scored big with $19,400 raised for Fragile X research, bringing total funds to $148,000!

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NPR Spotlights Zatolmilast: A Potential Breakthrough for Fragile X Syndrome

NPR spotlights zatolmilast, a promising investigational drug to treat Fragile X syndrome. Families report life-changing improvements in learning and independence.

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Coming Together for Rare Disease Day 2023

Today we mark Rare Disease Day. FRAXA is committed to advancing research on Fragile X, one of the most common rare diseases worldwide.

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Fragile X Clinical Trial of New PDE4D Inhibitor from Tetra

A $200K FRAXA grant enabled a successful Phase 2 trial of a PDE4D inhibitor for adult men with Fragile X, showing strong cognitive gains without side effects or tolerance.

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Tetra’s Fragile X Clinical Trial – The Most Successful So Far

Dr. Mark Gurney of Tetra Therapeutics, discusses how one of the earliest clues to the biology of Fragile X led to the most successful Fragile X clinical trial to date: a phase 2 trial of a PDE4D inhibitor.

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Tetra Releases Full Results of FRAXA-Funded Clinical Trial of PDE4D Inhibitor

Today, Tetra Therapeutics published the full results of its PDE4D trial. The data from this phase 2 clinical trial suggests the PDE4D drug can improve intellectual disability in Fragile X syndrome.

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Clinical Trials and Cyclic AMP in Fragile X Syndrome: A Life Journey

In this Simons Foundation lecture, Elizabeth Berry-Kravis traces 30 years of Fragile X research, from identifying its cause through a series of disappointing clinical trials.

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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.

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Companies Move to Advance Potential Cognitive Treatment for Fragile X

Tetra Therapeutics and Shionogi announced plans to expand their partnership supporting BPN14770, a treatment candidate for disorders marked by cognitive and memory deficits.

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Tetra Announces $40M to Advance BPN14770 for FXS and Alzheimer’s Disease

Tetra Discovery Partners has signed a multi-part deal that could bring it up to $160 million, plus royalties, from Shionogi & Co, Ltd, a Japanese major research-driven pharmaceutical company. Tetra currently is conducting an investigational Phase 2 study of BPN14770 in adults with Fragile X Syndrome, an indication for which BPN14770 has received Orphan Drug Designation from the US Food and Drug Administration. This clinical trial was made possible by early work with the FRAXA-DVI and over $200,000 from FRAXA.

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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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Funding opportunities - FRAXA investigators

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.  

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Encouraging Results from First Trial of Minocycline in Fragile X

A clinical trial of minocycline in children with Fragile X found significantly better global improvement vs. placebo, supporting its safety and potential.

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Iryna Ethell, PhD, at University of California

Role of Matrix Metalloproteinases (MMP-9) in Fragile X

With a $220,000 FRAXA grant, Dr. Iryna Ethell’s team at UC Riverside uncovered MMP-9’s role in Fragile X—leading to a major treatment strategy using minocycline.

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FRAXA Funded Research

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