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New Research Could Help Doctors Detect Parkinson's Disease Earlier
Berg, D., Espay, A. J., Lang, A. E., and colleagues. (2026). A biological framework for Parkinson's disease: Advances in alpha-synuclein-centered biomarkers and staging. Journal of Neurochemistry. https://doi.org/10.1111/jnc.70491

For years, Parkinson's disease has been diagnosed after movement symptoms such as tremors, stiffness, and balance problems appear. New research suggests that changes in a naturally occurring brain protein called alpha-synuclein may help doctors identify Parkinson's disease much earlier—even before noticeable symptoms begin.

Scientists are developing highly sensitive laboratory tests that can detect abnormal forms of this protein, potentially allowing physicians to diagnose Parkinson's disease sooner, better predict its progression, and match patients with future treatments and clinical trials. While these tests are still being studied, they represent an exciting step toward earlier diagnosis and more personalized care for people living with Parkinson's disease.
A Biological Framework for Parkinson’s Disease: Advances in Alpha-Synuclein Biomarkers and Disease Staging

Alpha-synuclein is a naturally occurring protein found in the brain. In Parkinson’s disease, the protein can fold abnormally and form clumps that damage nerve cells. Researchers now believe these abnormal alpha-synuclein proteins may serve as one of the earliest biological signs of Parkinson’s disease.

The review summarizes recent breakthroughs in alpha-synuclein seed amplification assays (SAAs), highly sensitive laboratory tests capable of detecting tiny amounts of abnormal alpha-synuclein in cerebrospinal fluid and other tissues. These tests have demonstrated remarkable accuracy in identifying many people with Parkinson’s disease, even before the development of classic motor symptoms.

Researchers propose moving toward a biological staging system that classifies Parkinson’s disease based on measurable changes occurring in the brain rather than relying solely on clinical symptoms. Similar approaches have already transformed the diagnosis and research of Alzheimer’s disease.

Although additional research is needed before these biomarkers become part of routine medical practice, the new framework could improve early diagnosis, help physicians personalize treatment plans, identify candidates for clinical trials and accelerate the development of disease-modifying therapies.
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Stay Connected with PASWFL
The Parkinson’s Association of Southwest Florida provides free programs, education, support groups, exercise classes and resources for individuals living with Parkinson’s disease and their care partners throughout Southwest Florida.
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Become a member today at https://parkinsonassociationswfl.org/signup.html and learn how our local programs can help you live well with Parkinson’s disease.

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PUBLISHED RESEARCH

 To ensure we are providing accurate and timely information, we only list articles on studies that are published in peer-reviewed periodicals and provide information to help you live well with PD.  To find additional papers and research CLICK HERE