Marisa Wexler, MS, senior science writer —

Note: This story was updated Aug. 13, 2024, to correct the spelling of the measure of cognitive development to Bayley-4. Authorities in both the U.S. and Europe have provided positive feedback to Ultragenyx Pharmaceutical regarding plans for a Phase 3 clinical trial testing its gene therapy candidate GTX-102…

A molecule dubbed (S)-PHA533533 is able to increase the expression of the UBE3A protein in mouse and human cell models of Angelman syndrome, a new study shows. “We still have a lot of work to do before we could start a clinical trial, but this small molecule provides an…

A previously unreported mutation in the UBE3A gene was found to be the cause of Angelman syndrome for two sisters. The sisters’ journey to obtaining a correct diagnosis was detailed in a paper, “Undiagnosed rare disease clinic identifies a novel UBE3A variant in two sisters…

The Phase 1/2 KIK-AS clinical trial, which is testing the experimental genetic therapy GTX-102 in children with Angelman syndrome, has finished enrolling patients. With 74 enrolled, including 53 in dose-expansion groups, the therapy’s developer Ultragenyx Pharmaceutical said results will be available in the next few months. “With completion…

Angelman syndrome patients who experience falls or sleep problems tend to have worse quality of life, according to a survey of caregivers. “Significant findings from this caregiver study revealed that the ability to walk and ambulate is associated with higher [quality of life], whereas falls, problems with sleep, and…

The protein Ube3a, whose defect causes Angelman syndrome, helps regulate connections between brain cells during development. That’s according to the study, “Presynaptic Ube3a E3 ligase promotes synapse elimination through down-regulation of BMP signaling,” which was published in Science. “Our findings reveal the physiological role of Ube3a…

Combining outcomes at clinic visits with those of at-home monitoring may be an effective way of determining an experimental treatment’s effectiveness in Angelman syndrome (AS) clinical trials, researchers report. Overall adherence in a yearlong observational study of AS patients “indicate that the key clinical aspects of AS identified by…

Two new standardized tools to measure the severity of Angelman syndrome (AS) in children — one based on clinician assessments and another on caregiver reports — have been developed and are in use in clinical trials to measure the disease’s severity and evaluate the impact of potential treatments. These…

A team of scientists in Italy has developed new nanoparticles that could deliver therapies to the brain through the nose. The effort was funded by the Angelman Syndrome Alliance as part of an effort to develop new brain-targeting therapies for Angelman syndrome. The new particles were described in…

Following lackluster data in Phase 1 testing, Roche announced it will not initiate new trials of the experimental therapy rugonersen (RO7248824) in treating people with Angelman syndrome. Although the therapy “has demonstrated an acceptable safety profile,” the company stated in a release, it will “not to move forward…