Skip to main content

Changes in the U4 or U6 Molecules Cause Retinitis Pigmentosa

Nonprofit research foundation

Help build the movement toward a cure forRNU4 and RNU6 Retinal DiseaseBe counted. Be connected.

CURE4/6 brings together families, scientists, clinicians, and researchers worldwide to accelerate discovery, improve genetic diagnosis, and develop therapies for inherited retinal disease caused by RNU4-2 and RNU6 variants. Cures are founded on science, but they are driven by patients who refuse to be invisible. For rare diseases, numbers matter. Every patient who joins the CURE4/6 Registry makes our community stronger, our voice louder, and our search for treatment harder to ignore. There is hope for RNU4-2 and RNU6 retinitis pigmentosa — but that hope will only become reality if we come together.

Our story

Esther's Story

Esther Herz, founder, President and Chairman of CURE4/6
Esther Herz, founder

For years, Esther and her family lived with unanswered questions.

For years, Esther and her family lived with unanswered questions as seven of her eight children slowly developed progressive RP, as their father had developed — with no genetic cause to be found. A recent family connection led to international scientists who finally traced the disease to the RNU4-2 gene. These scientists discovered many additional families with similar genetic variants and also in four types of RNU6. Esther founded CURE4/6 to turn that discovery into treatments and cures for everyone affected by RNU4/6 retinal disease.

Several years after my marriage, my husband began losing his vision from RP and eventually became legally blind. One after another, seven of our eight children began developing the same devastating disease, watching their own vision slowly deteriorate despite years of medical evaluations and genetic testing.

We searched tirelessly for answers, traveling from doctor to doctor, specialist to specialist, and consulting experts across multiple institutions. Yet despite the severity of the disease affecting nearly an entire generation of my family, no one could identify the genetic cause.

Without a diagnosis, there was no clear explanation, no targeted research pathway, and no realistic possibility of treatment.

Everything changed when my son married the granddaughter of a retired physician who became deeply moved by the family's struggle and decided to help pursue the mystery further. Working together with international experts — including Dr. Susanne Roosing in Nijmegen, The Netherlands, and Drs. Carlo Rivolta and Mathieu Quinodoz in Basel, Switzerland — our disease was finally traced to a previously unrecognized genetic cause involving the spliceosomal RNA gene RNU4-2.

The discovery not only provided long-awaited answers for my family, but also helped identify many additional families around the world with the same or closely related mutations affecting RNU4-2 and related RNU6 genes.

What began as our family's odyssey in search of answers became part of a much larger scientific breakthrough benefitting many more families.

I founded CURE4/6 with the goal of transforming that discovery into treatments and ultimately cures for patients affected by RNU4-2 and RNU6 retinal disease. By bringing together families, scientists and clinicians across the world, CURE4/6 seeks to accelerate diagnosis, deepen understanding of disease mechanisms, and advance the development of effective therapies before more vision is lost.

Esther Herz, President and Chairman

Understanding the condition

About RP

RP is an inherited blinding eye disease that starts with gradual loss of night vision followed by peripheral and then central vision. Hundreds of genetic variants can cause RP. A new group of genes causing RP in many previously undiagnosed patients has been recently discovered. These genes are RNU4-2 and RNU6-1, RNU6-2, RNU6-8 and RNU6-9. These variants cause RP in a dominant manner, usually affecting several family members. This discovery has opened a new chapter in the search for treatments.

Learn about RNU4-2 retinitis pigmentosa and RNU6 retinitis pigmentosa.

From our scientific advisors

Stay connected

Stay informed

Prefer to reach a person? Send us a message.

Get occasional updates on research progress and ways to help.