Thrive with your LAMP2 Gene
Whether your result is new or you’ve lived with it for years, connect with others who share your gene and stay close to the latest research and clinical trials that could help you live a healthier life.
Join the LAMP2 communityHave a different gene? Search here.
“When my result came back, I felt completely alone. Finding people who truly understood changed everything.”
Maria, 47
Living with the MYH7 cardiomyopathy gene
“My diagnosis explained my family history, and let me take action to protect my kids.”
Christy Johnson
Living with a DSP cardiomyopathy gene
“The community answered questions I didn’t even know how to ask. I finally feel in control.”
James, 34
Caregiver to father with TTN cardiomyopathy gene
Your LAMP2 quick-start guide
You don’t need to figure everything out today. Here’s what matters now, and what can wait a few weeks.
What you can do today
Join the LAMP2 email list. New LAMP2 trials and findings are emerging quickly. Fill out the form below to receive updates about future research and clinical trial opportunities.
Connect With Others: You don’t have to process this alone. Join the LAMP2 (Danon Disease) Facebook community to ask questions, share experiences, and hear from others on the same path.
Learn Through Video: Check out our recorded webinars with real patients, real doctors, and plain language.
Talk With Someone Who’s Been There: Not sure where to start? Email us with your questions at info@geneticcardiomyopathy.org
Learn More:
Visit the Danon Disease Foundation to learn more about Danon disease, patient support, advocacy, and research opportunities.
Also explore these trusted organizations for additional information and support:
- DCM Foundation: Learn more about dilated cardiomyopathy, inherited heart disease, patient education, and support resources.
- Foundation for Inherited Arrhythmias: Learn more about heart rhythm disorders, inherited arrhythmias, family screening, and patient support.
- HeartCharged: Learn more about inherited heart conditions through patient stories, education, advocacy, and support.
Building your care plan
Find a Specialist. Not all cardiologists specialize in cardiomyopathy or inherited heart conditions. In the coming weeks, connecting with a Cardiomyopathy Specialist can make a meaningful difference in how your care is guided.
Establish a Baseline. Your care team may recommend heart testing, such as an echocardiogram or EKG, to understand your current heart function and create a reference point for the future.
Consider Genetic Counseling. A genetic counselor can help you better understand your genetic testing result, what it means for your health, and how to approach conversations with family members who may want to be tested.
Support Your Heart Health. Your care team will work with you to focus on protective measures like blood pressure management. Small, consistent steps will give your heart the best opportunity to stay strong.
Take these resources with you:
Download and print the Doctor Discussion Guide to help you feel organized and confident as you navigate your diagnosis.
Understanding LAMP2 Gene (Danon Disease)
The Cell’s “Recycling Center”
The LAMP2 gene creates lysosome-associated membrane protein-2 (LAMP-2), an important protein that helps your body’s cells recycle and remove damaged materials through a natural process called autophagy. This process is especially important in heart muscle cells, which must work continuously throughout your lifetime.
What happens when LAMP2 is not working properly?
When the LAMP-2 protein is not working as it should, damaged materials can build up inside cells instead of being recycled. Over time, this can interfere with the normal function of heart muscle cells and may lead to hypertrophic cardiomyopathy (HCM), dilated cardiomyopathy (DCM), heart rhythm abnormalities (arrhythmias), electrical conduction disease, and heart failure.
Danon disease may also affect skeletal muscles, the eyes (particularly the retina), and learning or cognitive function. Symptoms and severity can vary from person to person.
The LAMP2 gene is located on the X chromosome, which affects how the disease shows up in males versus females. Males have only one X chromosome, so if their LAMP2 gene isn’t working, they have no backup copy which often causes symptoms to appear earlier and be more severe than in females. Females have two X chromosomes, so a working copy on the other X can partially compensate, often leading to later or milder onset, though females can still develop significant cardiomyopathy and rhythm abnormalities.
What this means for your care
Because Danon disease can progress over time, regular monitoring and specialized care are especially important. Your healthcare team may recommend routine heart imaging, rhythm monitoring, medications, an implantable cardioverter-defibrillator (ICD) when appropriate, or referral to an advanced heart failure or transplant center if needed. Genetic counseling for family members may also be recommended, since the condition can affect relatives differently.
Your care team will work with you to develop a personalized care plan that includes regular heart evaluations to detect changes early, helping guide timely treatment decisions and protect your heart over the long term.
Because LAMP2-related Danon disease is inherited, your family members may also benefit from genetic counseling and testing.
Women with a disease-causing LAMP2 variant have a 50% chance of passing the variant to each child, regardless of whether the child is a son or daughter. Men with a disease-causing LAMP2 variant pass the variant to all of their daughters and none of their sons.
Click here for practical tips on talking with your family members about your genetic results.
You did not cause this. Genetic variations are a natural part of human biology. Knowing this information now gives you and your care team a powerful tool to protect your heart health and guide your long‑term care.
Why Specialized Care Matters
Because LAMP2 variants are unique, your care should be too. While a general cardiologist is a great starting point, managing Danon disease usually requires a cardiomyopathy genetics specialist with experience caring for patients with inherited heart conditions.
To find a cardiomyopathy specialist, please click here.
“In a community matched to your exact diagnosis, families get support that helps them thrive.”
Sharisse Jiminez
Genetic Counselor
“Connecting with families who share your diagnosis can provide support, understanding, and sense of community.”
Sharisse Jimenez-Cyrus
Genetic Counselor
Watch a 2-minute message from our Executive Director, Greg Ruf
Connection & Support for LAMP2 Gene Patients
You are part of a supportive community.
“Finding the LAMP2 result felt like finally getting the owner’s manual for my heart.”
If you would like to connect with others, you can join our private LAMP2 (Danon Disease) Facebook community to ask questions, share experiences, and hear from others walking a similar path.
You can also learn more through the Danon Disease Foundation, which provides education, patient resources, advocacy, and opportunities to connect with the broader Danon disease community.
Watch & Learn about the LAMP2 Gene
Real patients, real doctors, real stories. Watch when you’re ready.
Dr. Joe Rossano Discusses Danon Disease (LAMP2 Gene) | 9 min.
LAMP2 Clinical Trials & Research
Progress in this field is steady and continually evolving. We currently know of more than 30 companies that are working on potential new cardiomyopathy therapies (mostly gene-specific), but many have not reached the clinical trial phase yet. We encourage you to visit our clinical trials and research page to view available opportunities that might be right for you.
Be sure to fill out the form below so that we can contact you when we know of any relevant trials or research opportunities. Staying connected means you remain part of the progress, even before specific clinical trials or research studies exist.
DES Webinars
BAG3 DCM Gene Therapy Clinical Trial Studies Webinar – 4.15.2026 | 61 min.
Affinia BAG3 DCM – UPBEAT Clinical Trial Webinar- 6.10.2026 | 1 hr 6 min.
Frequently asked questions about the LAMP2 Gene
What is the LAMP2 gene?
The LAMP2 gene helps cells break down and recycle material they no longer need. Certain disease-causing LAMP2 variants disrupt that process and cause Danon disease, a condition that can affect the heart and other parts of the body.
A genetic counselor can help explain what your specific genetic test result means.
How does Danon disease affect the heart?
Danon disease can cause hypertrophic cardiomyopathy, in which the heart muscle becomes thickened, or dilated cardiomyopathy, in which it becomes enlarged and weakened.
It can also cause abnormal heart rhythms. The way it develops varies from person to person, so ongoing care with a cardiomyopathy specialist matters.
Can a LAMP2 variant cause symptoms beyond cardiomyopathy?
Yes. Some people with Danon disease also have skeletal muscle weakness, changes affecting the retina, or learning and developmental difficulties. Not everyone has the same combination of symptoms. Tell your care team about concerns beyond your heart so they can decide whether other evaluations would help.
Can women and girls have Danon disease?
Yes. LAMP2 is on the X chromosome which means the inheritance pattern varies between males and females. Danon disease can affect people with one disease-causing variant. Symptoms often begin later or differ in females, but heart disease can still be significant. A woman or girl with a disease-causing LAMP2 variant should discuss appropriate heart monitoring with her care team, even if she feels well.
Should my family members have genetic testing?
If your genetic testing finds a pathogenic or likely pathogenic LAMP2 variant, a genetic counselor can help identify relatives who may benefit from testing and heart evaluation. LAMP2-related Danon disease follows an X-linked inheritance pattern: a mother with the variant can pass it to a child of any sex while a father with the variant passes it to his daughters, but not his sons.
What follow-up care might I need?
Your team may recommend regular heart imaging, electrocardiograms, and checks for abnormal rhythms. They may also assess muscle strength, vision, or other symptoms when appropriate. The right schedule depends on your age and findings, so ask your specialist what changes to watch for and when to return.
Where can I connect with other families affected by LAMP2?
GCAC’s Danon support group connects people living with LAMP2-related Danon disease and their families. It can be a place to share experiences, ask practical questions, and find educational resources alongside your medical care.
Join the LAMP2 community
Research is evolving quickly.
By filling out this contact form, you give us permission to notify you of relevant research and clinical trial opportunities as they arise.
Strictly Private: Your data is never shared with third parties without your permission.
Zero Pressure: You aren’t committing to anything.
Your Choice: Opt-in or out of communications at any time.
Have a different gene? Search here.
A Message of Hope
Many biopharma companies and researchers are working on advanced treatments for genetic cardiomyopathies. We anticipate new clinical trials and research opportunities in the near future. You found this community at the right moment. Welcome.