Understanding OPHN1.
Building Hope Together.
The OPHN1 Foundation brings together families, scientists, and advocates to advance research, share knowledge, and find therapies for OPHN1-related conditions.
The OPHN1 Foundation: Choose Your Path
Whether you're navigating a new diagnosis, supporting a loved one, or advancing the science — there's a place for you in the OPHN1 community.
Newly Diagnosed
Just received an OPHN1 diagnosis? Start here for guidance, resources, and connection with families who truly understand.
For Families & Caregivers
Connect with our community, participate in research, and find support for every stage of the journey alongside your loved one.
For Researchers
Dive into the molecular science of OPHN1 — from the Rho-GTPase pathway to synaptic mechanisms and emerging therapeutic targets.
A Gene at the Heart of Brain Development
The OPHN1 gene is located on the X-chromosome and contains instructions for making a protein called Oligophrenin-1 that helps regulate the structure and signaling of neurons, especially as the brain develops. This protein helps support connections between neurons and the signaling pathways that guide brain development. When OPHN1 doesn't work typically, brain development can be affected, which may lead to differences in learning, movement and behavior.
Variants in OPHN1 are correlated with OPHN1 Syndrome, sometimes referred to as "X-Linked Intellectual Disability with Cerebellar Hypoplasia Syndrome" or "OPHN1 Neurodevelopmental Disorder."
About the Science →Neuron Animation
Interactive neuron diagram
coming in Section 9
Recognizing OPHN1 Syndrome
OPHN1 Syndrome presents with a wide range of features that vary significantly between individuals. It is a rare disorder characterized by Intellectual Disability and changes in the cerebellum, the part of the brain that controls movement and balance. Understanding these signs can help families seek appropriate support and care.
Not every person will have every feature and severity may vary. Males are typically affected more severely than females.
Common Signs and Symptoms may include:
Common Clinical Features
When Symptoms Appear
A typical timeline of when different features become evident — from birth, through the first years, and into early childhood.
See the timeline →Care & Treatment Today
Current standard of care, supportive therapies, and the research the Foundation is pursuing toward future treatments.
Learn about care →
A Community Built on Love and Science
The OPHN1 Foundation is a family-led nonprofit dedicated to improving the lives of individuals affected by OPHN1 (Oligophrenin-1) gene mutations. OPHN1 is an X-linked condition that can cause developmental delay, seizures, cerebellar differences, and other neurological challenges.
Founded by parents who refused to accept that rare means forgotten, we connect families worldwide, fund critical research, and work alongside scientists and clinicians to accelerate the path toward treatments and, ultimately, a cure.
Meet Our Team →Together, We Can Find a Cure
Your generosity fuels the research that will change lives. Every dollar brings us closer to understanding OPHN1 and developing effective treatments.
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