IRSF launches $1 million fund for males with Rett syndrome

The International Rett Syndrome Foundation has launched MR., a new $1 million fund aimed at research, diagnosis and care for males with Rett syndrome. The effort is designed to close long-running gaps in clinical trial inclusion and access to treatments, with the first project expected to start in September.

Why it matters: - The fund is aimed at a major blind spot in Rett research: boys and men with the condition have often been missed, misdiagnosed or excluded from studies. - IRSF is tying funding to a strict inclusion rule, which could push research, trials and care strategies to reflect the full Rett spectrum. - The initiative is meant to help families get earlier diagnoses, better care and faster access to treatments.

What happened: - The International Rett Syndrome Foundation announced MR., the Males with Rett Fund, on Aug. 25, 2026. - The fund is set at $1 million and is dedicated to research that includes males with Rett syndrome. - Families of boys and men with Rett syndrome will hold governing oversight of the fund alongside IRSF scientific and regulatory expertise. - IRSF committed the first $200,000 to launch an initial project. - The remaining $800,000 will be raised through community events and individual donors.

The details: - Rett syndrome was long described as a disease affecting girls, which left many boys unseen, undiagnosed or misdiagnosed. - The Male Rett Spectrum Study added evidence that boys have Rett, their experiences vary widely, and outdated assumptions have delayed diagnosis and limited inclusion. - IRSF said no project will move forward unless it explicitly includes males with Rett syndrome. - Every project MR. funds must be 100% male-inclusive and directly advance understanding, access or inclusion. - The fund is meant to add dedicated support without pulling resources away from the broader Rett research agenda. - IRSF said the $1 million is a starting point meant to fund the first wave of male-inclusive research and help attract larger investment. - Through the Male Rett Spectrum Study led by Drs. Tim Benke and Talia Thompson of the University of Colorado School of Medicine, and male-specific questions added to the IRSF Rett Syndrome Registry, IRSF says it now has a far better picture of what boys and men with Rett experience. - IRSF says it holds the largest collection of male Rett registry data in the world. - The first project is expected to begin in September. - How quickly projects move will depend on how quickly the fund is filled. - IRSF said every gift shortens the wait for families whose sons remain shut out of clinical research. - Funding decisions will be based on scientific merit, feasibility, alignment with IRSF’s broader research strategy and the requirement that every funded project ensure access and inclusion of males with Rett. - Initial family Advisory Board members are Mary and Richard Engel, Rick and Alyssa Otis, Jeff and Jenna Manz, and Kate and Bill Ferdinandsen. - Initial scientific and clinical advisors are Dr. Tim Benke of Children’s Hospital Colorado and Dr. Bernhard Suter of Texas Children’s Hospital. - More information and support for MR. are available at more information.

Between the lines: - The launch reflects a shift from recognition to enforcement: IRSF is not just acknowledging male Rett patients, it is requiring their inclusion in funded work. - Family governance appears designed to keep the fund focused on lived experience, not just research priorities. - The Male Rett Spectrum Study and registry expansion give the fund a data base it can use to argue for larger future investment. - The language around “starting point” suggests IRSF wants this fund to seed a longer-term funding stream, not serve as a one-time grant pool.

What's next: - IRSF expects the first male-inclusive project to start in September. - Additional projects will move forward as the fund is raised. - IRSF and fund advocates will likely use early results to build a case for more research investment and broader inclusion in clinical trials. - Families of males with Rett syndrome, IRSF leadership and Male Rett Spectrum Study investigators are available for interviews. - B-roll, family photography and information about the published study are available on request.

The bottom line: - IRSF is turning a long-standing research gap into a targeted funding mandate: if a Rett project excludes males, it does not get funded.