Usher syndrome is the most common genetic cause of combined deafness and blindness. More than 400,000 people are affected by this disorder worldwide. There is currently no cure for Usher syndrome.
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Our mission is to raise awareness and accelerate research while providing information and support to individuals and families affected by Usher syndrome. We strive to be the most comprehensive resource for the Usher syndrome community, bridging the gap between researchers and families. Learn more and get involved.
ProQR Therapeutics announces positive findings from a planned three-month interim analysis of its Phase I/II Stellar trial of QR-421a to treat retinitis pigmentosa (RP) in adults who have Usher syndrome type 2 or non-syndromic RP due to mutations in a specific part of the USH2A gene, called exon 13. QR-421a, ProQR’s experimental RNA therapy is designed to skip exon 13 in the RNA with the aim to stop or reverse vision loss. QR-421a given as a single intravitreal injection was safe and well-tolerated. It also showed early and encouraging evidence of activity, with 25% of patients showing a benefit across multiple outcome measures.
What this means for Usher syndrome: While this particular experimental drug is only applicable to those with Usher syndrome due to mutation(s) in exon 13 of the USH2A gene, early positive findings mean that the trial will continue as designed and could lead to other RNA/drug therapies that will benefit people with Usher syndrome caused by other mutations.
The Usher Syndrome Coalition is closely monitoring ongoing developments in the coronavirus (COVID-19) spread.
The Usher Syndrome Coalition’s Board of Directors is evaluating the status of our annual USH Connections Conference, with the guidance of up-to-date information released by the Centers for Disease Control and Prevention (CDC) and other advisories within the United States and worldwide. Decisions will be communicated to all of our contacts immediately.
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In this USH Talk, Marcia Brooks shares an overview of iCanConnect, the National Deaf-Blind Equipment Distribution Program. iCanConnect provides free equipment and training to people with both significant hearing and vision loss who meet federal disability and income eligibility guidelines. iCanConnect is a national program with local contacts.
The ReNeuron Group has announced positive long-term data from its ongoing phase 1/2a clinical trial of its hRPC (human retinal progenitor cells) stem cell therapy candidate in Retinitis Pigmentosa. In October 2019 at the American Academy of Ophthalmology Meeting in San Francisco, data presented by Pravin Dugel, MD showed “a group of subjects who had a successful surgical procedure with sustained clinically relevant improvements in visual acuity compared with baseline, as measured by the number of letters read on the ETDRS chart.” The company has submitted a protocol amendment to the FDA to expand their 1/2a study to treat up to a further nine patients in the phase 2a segment of the study with a dose of two million hRPC cells compared to the dose of one million cells used so far. The amended trial protocol allows for a greater range of pre-treatment baseline visual acuity in patients and includes changes that enhance the ability to use microperimetry testing to measure and detect changes in retinal sensitivity in patients treated. If the amendment is approved the company expects to have sufficient data to commence a pivotal clinical study with its hRPC cell therapy candidate in RP by 2021. Furthermore, this clinical program has been granted Orphan Drug Designation in Europe and the US, as well as Fast Track designation from the FDA.
What this means for Usher syndrome:That Usher patients may benefit from this stem cell therapy in the near future if the amendment is approved and the company obtain sufficient data for the initiation of the pivotal clinical trial .
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