Fact Sheets

Veterans and Parkinson’s

More than 110,000 veterans with Parkinson’s disease (PD) receive care through the U.S. Department of Veterans Affairs (VA). The Parkinson’s Foundation is here to help veterans and their loved ones live well with PD. To find resources tailored to the veteran community, visit Parkinson.org/Veterans or call the Parkinson’s Foundation Helpline at 1-800-4PD-INFO (1-800-473-4636).

What is Parkinson’s disease?

Parkinson’s disease is a progressive, neurological disorder that occurs when the cells in the brain that make dopamine start to die. The rate of progression and symptoms are different for everyone. Movement symptoms can include tremors, slowness of movement, stiffness and problems with balance. Non-movement symptoms can include fatigue, depression, anxiety and problems with sleep.

There are nearly one million people in the U.S. living with PD and an additional 90,000 people are newly diagnosed each year. There is no cure for Parkinson’s, but treatment can improve quality of life. Treatment options include medication, exercise, rehabilitation therapies (physical, occupational and speech therapies), surgical options and a healthy diet.

Medical Care and Treatment

Many U.S. veterans with Parkinson’s can access specialized medical care and financial assistance through the VA. The VA provides Parkinson’s treatment at Parkinson’s Disease Research, Education & Clinical Centers (PADRECCs) and their Associated Sites. To learn more, visit www.parkinsons.va.gov or call 1-800-949-1001 x205769. To apply for VA healthcare, visit www.va.gov/health-care/how-to-apply or call 1-877-222-8387.

Agent Orange and Toxic Exposures

In some cases, developing Parkinson's can be associated with exposure to Agent Orange or other herbicides during military service. Agent Orange was a powerful herbicide used in Vietnam from 1962 to 1975, but was also used and stored in other locations. Veterans may be eligible for a free environmental health registry evaluation, disability compensation and other VA benefits. To learn more, visit Parkinson.org/Veterans or call the Veteran Benefits Administration at 1-800-827-1000.

Veterans Benefits

Veterans living with Parkinson’s may qualify for financial benefit programs to help cope with financial challenges. Service members, veterans and families can apply for various VA benefits by:

  • Applying online at www.eBenefits.va.gov.

  • Working with an accredited representative or VSO. Federal law prohibits attorneys and others from charging a fee to assist with the VA application.

  • Calling the VA’s toll-free hotline at 1-800-827-1000, Monday-Friday 9 a.m. to 9 p.m. ET.

Caring for a Veteran with Parkinson’s

The care partner experience is unique to every individual. The Parkinson’s Foundation and VA have resources specially designed for those caring for a veteran with Parkinson’s. Regardless of whether you are early in the journey, caring from afar or supporting a loved one in the advanced stages of Parkinson’s, we have the resources to help. Learn more at Parkinson.org/Veterans.

Hospital Safety

Every person living with Parkinson’s should be prepared for a possible hospitalization including veterans and their care partners. Visit Parkinson.org/HospitalSafety to learn more and order or download your free Hospital Safety Guide.

Mental Health

Mental health concerns like depression and anxiety are common in people with PD. They can be the result of living with a chronic condition, but they can also be a symptom of the disease itself and changes in the brain. Be aware of these symptoms and do not hesitate to talk to your doctor. Keep the Veterans Crisis Line number nearby, just in case: dial 988, then press 1 or text 838255.

My PD Story

Tru Niagen selfie
Family Members

Tru Niagen

Finding Strength, Hope, and Purpose 

When I think of the words courage and strength, I think of my beautiful mom. Her name is Deanna and at her wise age of 77, she still manages to find ways to inspire me. She was diagnosed with Parkinson’s disease (PD) a few years ago after my parents retired and moved to a little beach town in the coast of Ecuador. But you never know what being diagnosed really means until you actually face it. 

The first time I saw my mom after her diagnosis, PD became very real. Seeing her unable to control the tremors and drag her feet made her seem so frail. I felt hopeless but my mom doesn’t give up easily and every day she finds ways to feel like herself. 

Overcoming the Challenges 

To say that witnessing my mom’s battle with PD from thousands of miles away is difficult, is an understatement. I only see my mom once a year and through the physical distance is challenging, our emotional bond has only gotten stronger. 

I’m grateful for the small ways I can support her even from afar. Despite everything she’s endured since her diagnosis, my mom refuses to let Parkinson’s define her and embraces every day with a positive attitude. She shares her story to bring awareness and help those who also need the strength not to give up. 

My Advice

I am not equipped to offer advice to anyone newly diagnosed with Parkinson’s, but as someone watching her mom manage PD, I can say that showing kindness and patience can be the best act of love. Simple things like signing your name, walking and even talking can be difficult for people with PD. When I’m with my mom I do things at her pace. When we’re on the phone, I take the time to really listen. 

Proud of Our Supportive Community 

My employer ChromaDex, makers of Tru Niagen, is a pioneer in healthy aging research and a proud sponsor of the Parkinson’s Foundation and I love how supportive they’ve been of my involvement in Parkinson’s initiatives. Working at ChromaDex and having direct access to scientific research on NAD+ has helped me better understand the science behind cellular health and how lifestyle stressors may affect the way we age. It’s given me a new perspective and further motivation to find ways to help my mom. 

Through the Parkinson’s Foundation, my mom is able to use their online mobility and education classes since they’re available in multiple languages, including Spanish. These resources have proven to be especially valuable for my mom. 

My friend and colleague Suhad, whose father was also affected by PD before his passing in 2015, has joined me as a Parkinson’s Champion to raise awareness and funds for Parkinson’s research. As we prepare for our 10K run at the Disneyland Halloween Half Marathon Weekend event in Anaheim, CA, we are most appreciative for all the physical abilities we have that allow us to run and honor our parents today.

Explore the many ways you can support the Parkinson’s Foundation today!

My PD Story

Michael Citrin headshot
People with PD

Michael S. Citrin

We honor the loss of Michael, who has passed away since the publishing of his story. We value his commitment to the Parkinson's community and dedication to PD advocacy.

After living with Parkinson’s disease (PD) for more than 30 years, I know how it impacts a person’s life and their loved ones.  

I first noticed tremors in my arm while participating in a fox hunt. It took more than eight years and several specialist visits to finally confirm my symptoms were a result of Parkinson’s disease.  

While my journey has not always been smooth, I’ve found happiness in keeping PD at bay by taking control of my treatment and working to overcome the physical and emotional effects of Parkinson’s. I’ve learned that viewing life through Parkinson’s can help you cherish each positive moment and work toward fulfilling your dreams. 

After all I’ve been through with this disease, I want to offer some advice that has worked for me to manage Parkinson’s. I recently wrote “Thirty Years with Parkinson’s Disease The Unscientific Truth” as a free study or self-help guide, using my life experience as an example. If you are interested in reading it, please contact Kelly Austin at kaustin@parkinson.org. Here are some of the thoughts I share in it: 

  • Create an action plan that includes several small steps you can take on gradually. 

  • Be your own advocate. Ask questions and don’t be afraid to question your treatment plan. 

  • Find a quarterback in a doctor, someone who can help you navigate PD. 

  • Determine what matters most to you and those you care about. Use this as a guide for your care plan so that you can achieve your goals and pursue your interests. 

  • Add lots of exercise and mental stimulation into your life to keep your brain and body working. Don’t crawl into a fox hole and never get out. 

I would not have been able to fight this disease for so long if it were not for the support of my late wife, Adrienne, my family and my doctor. For more than 20 years, I drove 100 miles to see Dr. Lucien Côté, at Columbia University Irving Medical Center, a Parkinson’s Foundation Center of Excellence. He was an incredible man and doctor. He spent so much time with each of his patients, asking them questions and taking meticulous notes and forming treatment plans that were tailored to each patient. I am forever grateful to him, and I miss his kindness, comfort and wisdom. 

Explore Parkinson’s Foundation resources for the PD topics and symptoms that matter most to you right now.
I want to learn more >>

I am also grateful for organizations like the Parkinson’s Foundation. Parkinson’s is not episodic, but I’ve found the medical world is set up to treat things in snapshots. That is not how Parkinson’s works, so people are often stuck looking for resources and support themselves. The Parkinson’s Foundation is wonderful because it provides education and helps people navigate the disease to live well. As proof of my gratitude for their educational work, I have made a substantial planned gift to the Parkinson’s Foundation. 

Michael Citrin biking

I firmly believe every person should have a life, even if they are fighting a disease like PD. I’m very protective of “me” and I don’t let the disease control me. I prioritize exercise and singing in my church choir. I’ve traveled and spent many years riding my motorcycle around the country with my wife. Today I ride a tadpole-configured, fat boy recumbent trike. I have never run from PD. I embrace it and the surprises it brings to my life. I hope these tips help others do the same. 

Make a lasting impact with a planned gift to the Parkinson’s Foundation. Learn more at Parkinson.org/PlannedGiving.

Podcasts

Episodio 31: Alucinaciones y delusiones en el Parkinson

Alrededor de un 20-40% de las personas con Parkinson experimentan algún tipo de alucinación o delusión en algún momento de su recorrido por la enfermedad de Parkinson (EP). Aunque en la actualidad los estudios no indican que la comunidad hispanohablante de la EP corra un mayor riesgo de desarrollar estos síntomas, sigue siendo importante conocer los posibles signos para estar mejor preparado para manejar situaciones de emergencia. Las alucinaciones y delusiones en sí pueden asustar, pero cuando se combinan con otros síntomas del Parkinson, pueden ser aún más problemáticas. 

En este episodio, hablamos con la Dra. Blanca Valdovinos, neuróloga especialista en trastornos del movimiento del Centro Médico de University of Rochester. Ella comparte su experiencia de primera mano en trabajar con personas con Parkinson, basándose en el tiempo que pasó dirigiendo una clínica semanal para sus pacientes hispanohablantes con afecciones neurológicas. Explica qué son las alucinaciones y delusiones, destaca sus diferencias y proporciona ejemplos de cómo pueden presentarse en una persona con Parkinson. Ofrece orientación para reconocer las primeras señales y comparte cómo los familiares y aliados en el cuidado pueden responder mejor si su ser querido experimenta una alucinación o delusión. 

Publicado: 10 de septiembre de 2024

Advancing Research

Meet a Researcher Using Ultrasound Stimulation to Address Freezing of Gait

Bhattacharya-Meet-the-Researcher

Freezing of gait is a common Parkinson’s disease (PD) symptom where a person experiences the temporary, involuntary inability to move. This can make simple activities, like walking across a room, incredibly challenging and dangerous due to the risk of falls. Unfortunately, common Parkinson’s medications often don’t alleviate these freezing episodes. This has led researchers like Amitabh Bhattacharya, PhD, from the University Health Network (UHN) in Canada, to explore new treatments. 

What is a transcranial ultrasound stimulation (TUS)?

  • Transcranial: “Through the skull,” noninvasively 
  • Ultrasound: A high-frequency soundwave safe for brain stimulation 
  • Stimulation: The use of the ultrasonic soundwaves to activate neurons 
Bhattacharya-Blog

Dr. Bhattacharya is a recipient of a 2024 Parkinson’s Foundation Postdoctoral Fellowship, and will use this support to study how TUS can be utilized to help people with PD create personalized non-invasive treatments that targets freezing of gait. 

“We will apply focused ultrasound waves to a specific part of the brain known as the pedunculopontine nucleus (PPN), a key region that helps control movement,” he said. “By precisely stimulating the PPN, we hope to make walking easier for people with Parkinson’s.” 

Participants, recruited with help from the Toronto Western Hospital Movement Disorders Clinic, a Parkinson’s Foundation Center of Excellence, will first undergo a high-resolution brain scan to create a detailed map of their brain, focusing on the PPN. This personalized brain map will guide the ultrasound device to ensure that the sound waves are precisely directed to the right spot.  

Each participant will receive three personalized TUS treatments, using different stimulation protocols to determine the most effective approach. To evaluate how well each protocol works, participants will be assessed before and after each session using tests that measure their walking ability, mental function, and brain activity. 

Finally, Dr. Bhattacharya will have enough scientific evidence to determine the ability of TUS in improving freezing of gait, as well as how to keep improving the technique to make it even safer and more effective. 

Dr. Bhattacharya is confident in this treatment’s potential to improve the lives of those experiencing PD-associated freezing of gait. “Targeting the PPN through non-invasive means such as TUS holds immense promise,” he said. “The ability of PPN-TUS to modulate these essential neural circuits could help restore a degree of normal motor function, thereby mitigating symptoms such as freezing of gait in PD.”  

The goal of this study is to explore TUS as a practical and effective treatment for freezing of gait in Parkinson’s Disease. TUS is a non-invasive approach that could offer a quicker, more accessible, and cost-effective option for patients. By avoiding the complexities and recovery time associated with surgical procedures like deep-brain stimulation (DBS), TUS has the potential to enhance mobility and improve quality of life. The accessibility of this new potential treatment is top-of-mind for Dr. Bhattacharya.  

“PPN-TUS offers a non-invasive, cost-effective alternative with fewer potential complications compared to PPN-DBS,” he said. “This study could transform the way we help Parkinson's patients regain their mobility. If successful, this non-invasive method may eventually become a standard treatment, offering improved quality of life for individuals with Parkinson’s disease.” 

Meet more Parkinson’s researchers! Explore our My PD Stories featuring PD researchers.

Raise Awareness

11 de los principales recursos acerca del Parkinson en español

🧠 ¿Qué aprenderá en este artículo?

Este artículo destaca los recursos en español de la Parkinson's Foundation para brindar apoyo a las comunidades hispanas y latinas que viven con la enfermedad de Parkinson. Se destaca lo siguiente:

  • Cómo la Parkinson's Foundation trabaja para aumentar el acceso a la educación, la investigación y la atención para la comunidad hispana y latina con la EP.
  • Los 11 principales recursos disponibles en español, incluidos podcasts, videos, herramientas de chat con IA, estudios de investigación y más.
  • Cómo acceder a recursos en español.
pareja mirando una computadora portátil

El Mes de la Herencia Hispana reconoce las amplias contribuciones de la comunidad hispana y latina en los EE. UU., que representa casi el 20% de la población del país (aproximadamente 65 millones de personas), según las estimaciones de población de 2023 de la Oficina del Censo de los EE. UU..

Dado que esta comunidad está subrepresentada en la investigación y tiene una mayor probabilidad de experimentar brechas en el acceso y la cobertura de la atención médica cuando se trata de la enfermedad de Parkinson (EP), trabajamos para aumentar el acceso a la educación, la investigación y la atención.

Explore a continuación los 11 principales recursos de la Parkinson's Foundation disponibles en español:

1. Pregúntele a PAM: Herramienta de chat impulsada por IA

Pregúntele a PAM (Ask PAM, Parkinson’s Assistance Messenger o mensajero de asistencia para el Parkinson) es una herramienta de chat impulsada por IA de la Parkinson's Foundation que le brinda respuestas confiables y basadas en evidencia sobre el Parkinson en español al alcance de su mano.

2. Parkinson.org/Espanol

Disponemos de más de 90 páginas web con información clave sobre el Parkinson, que van desde el manejo del estilo de vida hasta la comprensión de la EP y sus síntomas. Consulte nuestras páginas principales:

  • Dieta y nutrición: Aprenda cómo una dieta equilibrada, basada en alimentos integrales y rica en verduras, frutas y proteína puede ayudar a aliviar los síntomas del Parkinson.
  • Salud sexual: Aprenda cómo los desafíos sexuales en la EP afectan la intimidad, la autoestima y el bienestar emocional, con frustración, depresión y estrés en la relación como consecuencias comunes.
  • Estreñimiento: Como una de las señales más comunes y tempranas del Parkinson, el estreñimiento también puede ser un efecto secundario de ciertos medicamentos para la EP.

3. Perspectivas profesionales

Aprenda directamente de profesionales de la salud sobre temas que van desde recién diagnosticadosla progresión de la EPla EP de inicio temprano a través de nuestra serie de videos en español Perspectivas profesionales.

4. Línea de Ayuda

Nuestra Línea de Ayuda gratuita, 1-800-4PD-INFO (1-800-473-4636), opción 3 para español, está abierta de lunes a viernes, de 9 a. m. a 7 p. m., hora del Este. Hable con un especialista de la Línea de Ayuda que pueda orientarle con sus preguntas sobre la EP y recomendarle especialistas.

5. EP Salud en Casa

Explore nuestros programas virtuales en español, EP Salud en Casa, para conectarse con programas de salud mentalbienestarejercicio. Explore nuestra amplia lista de programas grabados.

6. Blog en español

Visite nuestro Blog en español y lea sobre los temas más recientes de la EP: desde investigación hasta orientación sobre cómo manejar los síntomas de la EP.

7. Podcast en español

Escuche nuestro podcast, Temas importantes: vida y ciencia del Parkinson, mientras abordamos tratamientos para la EP, investigaciones y técnicas para ayudarle a usted y a su ser querido a vivir mejor con la EP.

8. Biblioteca de la EP

Profundice en los síntomas y temas de la EP que más le importan en este momento. Visite nuestra Biblioteca de la EP y elija su formato de aprendizaje preferido: desde hojas informativas hasta webinars y libros, ¡nuestra biblioteca tiene algo para cada tipo de estudiante!

9. Guías para Recién diagnosticadosSeguridad hospitalaria

Nuestra Guía para recién diagnosticados está diseñada para ayudar a las personas con Parkinson y a sus seres queridos que están comenzando su camino con la EP.

Nuestra Guía de seguridad hospitalaria destaca herramientas e información útiles para prepararse y manejar una estadía en el hospital. Lea hoy la versión en español de estas guías.

10. Playlist en español de YouTube

Explore nuestros videos en español más populares en ‘Canal en español: Recursos para ti: desde programas de ejercicios guiados hasta webinars con profesionales de la salud que exploran temas esenciales sobre la EP.

11. Nuestro estudio de genética

PD GENEration: Impulsado por la Parkinson’s Foundation, es un estudio internacional de investigación que ofrece pruebas genéticas y consejería genética sin costo para las personas diagnosticados con la EP. Conozca los resultados actuales del estudio y cómo estos resultados están ayudando a los profesionales médicos a desarrollar tratamientos mejorados y medicina personalizada para tratar la EP.

Aprenda más acerca de la comunidad hispana y latina de la EP ahora.

My PD Story

Dr. Reversa Joseph headshot
Health Professionals

Dr. Reversa Joseph

My journey into medicine began with a passion for solving problems and seeking answers, which naturally led me to neuroscience. However, witnessing my father, a Vietnam veteran, struggle with Parkinson’s disease (PD) became the pivotal moment that directed me toward Neurology and ultimately specializing in Movement Disorders. This deeply personal experience profoundly shaped my life and my family’s.

One unforgettable experience was transitioning my practice from an academic institution to the U.S. Department of Veterans Affairs (VA) to address the unmet needs of veterans with movement disorders.

Driven by my father’s condition, this shift was both uplifting and challenging. This significant transition was driven by a clear unmet need and my desire to serve our veterans, honoring my father’s condition and his service to our country.

At the VA, I developed and lead a Movement Disorders Clinic, directing a Multidisciplinary Care Team to provide comprehensive, integrative care to veterans with Parkinson’s disease and other neurological disorders. This endeavor has been deeply fulfilling and reinforced my commitment to serving vulnerable populations and improving healthcare access.

My involvement with the Parkinson's Foundation began in 2018 as a board member for the Great Lakes Chapter. Throughout the years, I have supported the Foundation by giving various presentations on topics such as PD 101, Women and Parkinson's Disease, and Integrative Therapies and PD. I also participate in Moving Day with my team, Vets on the Move.

I am particularly proud of our efforts to mitigate health inequities in people living with Parkinson’s through targeted and tailored training in research advocacy. One of my most rewarding contributions has been to help develop a novel Learning Institute using culturally responsive pedagogy to train African Americans living with Parkinson’s and their care partners to collaborate with researchers and scientists as primary partners in the drug development process.

Additionally, I have given national lectures for the Parkinson’s Foundation to raise awareness about Parkinson’s disease and the Black community, addressing issues such as late and misdiagnosis, treatment and overall care. I work to provide a framework on how to mitigate these disparities. I have also participated in various podcasts to raise awareness that Parkinson’s also affects African Americans.

Volunteering for the Parkinson's Foundation is more than just a commitment; it’s a deeply personal mission. Each effort, whether it’s a presentation, a lecture, or a podcast, is a step towards improving the lives of those affected by Parkinson’s, honoring my father’s struggle and ensuring that every person with PD receives the comprehensive, integrative care they deserve.

The Parkinson’s Foundation has been a beacon of hope and support, and through my volunteer work, I aim to give back to an organization that tirelessly works to better the lives of so many. My volunteer work is driven by a desire to make a tangible difference, to support an organization that supports so many, and to contribute to the fight against Parkinson’s disease with all the dedication and passion it deserves.

Explore the many ways to volunteer with the Parkinson’s Foundation. Fill out our volunteer interest form today.

Raise Awareness

Reach Further Campaign Exceeds Fundraising Goal

Thanks to our wonderful donors and community, we are excited to announce that our Reach Further fundraising campaign exceeded its goal early. In just three years, we raised $38.4 million to accelerate progress in Parkinson’s disease (PD) research, improve care and increase access to quality-of-life programs.

“Exceeding our campaign goal is a huge milestone, and we are so grateful to every person who made this campaign a priority,” said John L. Lehr, president and CEO of the Parkinson’s Foundation. “These funds allow us to accelerate our mission and create lasting impact in the lives of people with Parkinson’s.”

Launched in 2021, the Reach Further campaign helped fund PD programs and provide resources to local communities across the nation, providing support to people with Parkinson’s and their loved ones.

Reach Further Impact Infographic

Here are four of the ways your support of the Reach Further campaign helped us impact people with Parkinson’s:

1. Recruited more than 15,000 participants for PD GENEration: Mapping the Future of Parkinson’s disease, our landmark genetics initiative. We also expanded access to the study to Black and African American communities, as well as Spanish-speaking communities in the U.S. and throughout the Western Hemisphere.

Thanks to this expansion, more people with Parkinson’s know if they have a genetic form of PD and have received genetic counseling to understand their results. So far, the study has identified that 12.7% of participants have a genetic form of PD.

Increasing the number of people participating in PD GENEration, and ensuring we are testing a diverse population, an accelerate relevant clinical trials, bringing us closer to a better understanding of PD and identifying potential new treatments.

Enroll Now

2. Launched Parkinson’s Virtual Biotech in partnership with Parkinson’s UK to build a pipeline of new drugs exclusively aimed to target Parkinson’s.

Taking a new drug from an idea to becoming an available medication can take years and upwards of one billion dollars. The Parkinson’s Virtual Biotech works to accelerate that timeline by building a pipeline of new drugs exclusively for Parkinson’s.

The Parkinson’s Virtual Biotech is directly investing in medications that either address symptoms or aim to slow, stop or prevent the disease altogether.

Discover the drugs in development right now

3. Expanded our Global Care Network, adding 18 new Center designations to provide better, more attainable care.

Finding the right care team can improve the health and quality of life of a person with Parkinson’s. Our Global Care Network aims to make high-quality care accessible to more people with Parkinson’s, while also providing health professionals the chance to advance their skills and share their knowledge.

Through expanding our Global Care Network, we are taking one step closer to our goal of ensuring all people with PD have access to the equitable and quality care they need, when and where they need it.

Find expert care near you

4. Awarded $4 million in community grants across the U.S., addressing critical needs such as exercise, mental health and care partner support.

Woman and man dancing during a class

From dance classes to Rock Steady Boxing workout classes, local PD programs empower people with Parkinson’s and help them find community support. Through our community grants, we are proud to support the dedicated professionals and volunteers offering vital programs and resources to people with Parkinson’s around the country. These programs foster local Parkinson’s communities and help people live better with PD.

Find a program in your community

THANK YOU for helping us make life better for people with Parkinson’s through your support of the Reach Further campaign. These impact-driven achievements could not have happened without your support. Your generosity continues to elevate our research, care and education programs to new heights.

Discover new ways you can help the Parkinson’s community. Learn more about the Parkinson’s Foundation at Parkinson.org or 1.800.4PD.INFO (1-800-473-4636).

Podcasts

Episode 170: Introducing Our Hospital Safety Guide

A hospital stay can be a stressful situation for everyone, whether you are the person receiving care or the support person providing comfort.  People with Parkinson’s (PD) are at a higher risk of hospitalizations, so it is crucial to be prepared ahead of time for when the situation arises. The Parkinson’s Foundation recently created the Hospital Safety Guide, which is the updated and improved version of the former Aware in Care kit. The Guide incorporates information from the kit, but now highlights the “Five Parkinson’s Care Needs”, which is a tool for communicating your needs and priorities with hospital staff. It also includes a Hospital Planner checklist with step-by-step instructions on how to create a hospital “go bag” for emergencies. The Guide provides infographics and real-life examples from people with Parkinson’s and loved ones who have solved common problems relating to their PD when in the hospital. 

In this episode, Annie Brooks, Director of Strategic Initiatives at the Parkinson’s Foundation, discusses features of the new Hospital Safety Guide and how best to use it.

Released: July 9, 2024

Science News

A Protein that Protects Against Brain Cell Degeneration Associated with Parkinson’s

Parkinson's Foundation Science News blogs

Guanylyl cyclase C (GUCY2C) is protective against dopamine neuron degeneration, a hallmark of Parkinson’s, by helping the cell’s powerhouse.

A new study is the first to identify a brain receptor called GUCY2C as a potential way to fight dopamine loss.

Parkinson’s disease (PD) is caused by the death of neurons that produce dopamine — a feel-good chemical related to movement, mood and more — in the brain. Dopamine neurons are involved in movement and the loss of these neurons disrupts the brain's ability to regulate movement, leading to hallmark PD symptoms, such as tremors, rigidity and slowness.

One of the reasons that dopamine neurons die is due to dysfunction of mitochondria, the small oxygen-consuming and energy-producing powerhouses inside cells. Recent research has found a receptor on the surfaces of those Parkinson’s-associated dopamine neurons that may provide therapeutic ways to protect the mitochondria and prevent the progression of the disease.

The receptor, called guanylyl cyclase C (GUCY2C), was first discovered on the surfaces of cells in the intestine, but was recently found in a region of the brain called the substantia nigra pars compacta (SNpc). This area of the brain is affected in PD.

A new study led by Scott Waldman, MD, PhD, and funded by the Parkinson’s Foundation 2023 Impact Award, gives a clearer picture of how GUCY2C signaling can provide protection against mitochondrial dysregulation and dopamine neuron degeneration that leads to PD. According to the study, in people with Parkinson’s, dopamine neurons make extra GUCY2C receptors.

About the Study & Results

Dr. Waldman and his team studied mice with and without the GUCY2C receptor. They found that loss of GUCY2C led to mitochondrial dysfunction, oxidative stress and cell death within the part of the brain impacted by PD, suggesting a protective nature of GUCY2C.

When the researchers gave the two groups of mice a toxin that induces PD symptoms by targeting mitochondria in dopamine neurons, only mice that did not have GUCY2C receptors had higher rates of dopamine neuron death. In contrast, mice with GUCY2C increased their production of the protein upon treatment with the toxin, further indicating a protective role.

The researchers also found that cyclic GMP (cGMP), a byproduct of GUCY2C activation, protected dopamine neurons from oxidative stress. In neurons grown in a petri dish, adding a molecule that increases cGMP protected dopamine neurons from oxidative stress and mitochondrial dysfunction when they added the PD-inducing toxin.

These results indicate that in Parkinson’s disease, the increase in GUCY2C might be the body's attempt to protect dopamine neurons from damage. It may be possible to develop a molecule that targets GUCY2C or use existing drugs that increase cGMP to protect dopamine neurons from damage.

Neuron cells system

Highlights

  • Loss of the receptor GUCY2C led to dopamine neuron degeneration in mice — in other words, not having the GUCY2C receptor led to neuronal dysfunction in brain regions implicated in PD.
  • A molecule that increases cGMP (a byproduct of GUCY2C activation) protected neurons grown in a petri dish from mitochondrial dysfunction and cell death when the researchers added a toxin that induces neurodegeneration.
  • Because GUCY2C is increased in people with Parkinson’s, the study results suggest that the increase in GUCY2C may be the body's attempt to protect dopamine neurons from damage.

What does this mean?

This study is the first to identify the receptor GUCY2C as a possible defense mechanism against dopamine loss. This research marks the beginning of what can be a new way to significantly slow down the progression of Parkinson’s.

Since GUCY2C appears to protect dopamine neurons in the brain, researchers could explore the possibility of stimulating GUCY2C as a treatment for PD. They could also try increasing cGMP, a byproduct of GUCY2C activation. This could potentially prevent the degeneration of dopamine neurons, a hallmark of the disease.

The study also found that people with PD have high levels of GUCY2C, which may also serve as an early indicator of Parkinson’s.

What do these findings mean to the people with PD right now?

With more research, GUCY2C could be a potential biomarker doctors can use to detect PD earlier. Having access to early biomarkers are critical for early therapeutic interventions for people with PD.

In addition, GUCY2C is a promising therapeutic target to prevent or treat PD. While developing a treatment that targets GUCY2C or its byproducts could take time, it remains important for researchers to identify as many potential treatments as possible. People who are currently experiencing Parkinson’s symptoms should talk to a healthcare provider.

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The Parkinson’s Foundation believes in empowering the Parkinson’s community through education. Learn more about PD and the topics in this article through our below resources, or by calling our free Helpline at 1-800-4PD-INFO (1-800-473-4636) for answers to your Parkinson’s questions.

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