Medical research continues to advance, and Rancho Research Institute (RRI) is contributing to an important milestone in genetic medicine. As part of a multi-center clinical trial led by EG427, the first patient in a first-in-human study evaluating an investigational gene therapy for overactive bladder (OAB) was treated at RRI, located within Rancho Los Amigos National Rehabilitation Center in Downey, California.
A Breakthrough for Overactive Bladder Patients
OAB is a condition that affects millions worldwide, significantly impacting quality of life by causing sudden, frequent urges to urinate. Traditional treatments, including medication and behavioral therapy, often come with side effects or limited efficacy. Gene therapy presents a new frontier, offering a more targeted and potentially long-lasting solution.

Rancho Research Institute’s Role in the Study
The study is being conducted at four leading research institutions across the United States. The first patient received treatment at Rancho Research Institute, where Dr. Evgeniy Kreydin, MD, and the team administered the procedure. This milestone marks an essential step in evaluating the potential of EG427’s gene therapy.
Participants in the trial are receiving a single treatment course consisting of multiple intradetrusor injections of EG110A, an investigational gene therapy delivered directly into the bladder muscle. This novel approach has the potential to offer a more effective and long-term alternative to conventional treatments.
The Science Behind the Therapy
Unlike conventional treatments that focus on symptom management, gene therapy works by introducing genetic material to help regulate or repair dysfunctional biological processes. The therapy under investigation utilizes a non-replicative herpes simplex virus (HSV-1) vector to deliver a therapeutic gene directly to bladder tissue. This precise approach could mean fewer side effects and more effective, lasting relief for patients suffering from OAB.
What This Means for the Future of Medicine
The launch of this trial represents a major step in making gene therapy a viable treatment option for a broader range of conditions beyond rare genetic disorders. If successful, it could pave the way for future research into non-invasive gene therapies targeting chronic diseases.
For patients suffering from OAB, this study represents a potential paradigm shift—one that could lead to a future where lasting relief is possible without the drawbacks of current treatment options.
Looking Ahead
Rancho Research Institute’s involvement in this trial underscores its commitment to advancing medical research and improving patient care. As this clinical trial progresses, RRI continues to contribute to testing innovative therapies that have the potential to transform lives.
Stay tuned for more updates on this groundbreaking study and other pioneering research happening at Rancho Research Institute!
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