Corporate Banner
Satellite Banner
Proteomics
Scientific Community
 
Become a Member | Sign in
Home>News>This Article
  News
Return

Comprehensive Parkinson's Biomarker Test Has Prognostic and Diagnostic Value

Published: Monday, September 02, 2013
Last Updated: Monday, September 02, 2013
Bookmark and Share
First biomarker results reported from the Parkinson’s Progression Markers Initiative (PPMI).

Results show that a comprehensive test of protein biomarkers in spinal fluid have prognostic and diagnostic value in early stages of Parkinson’s disease.

Compared to healthy adults, the study found that people with early Parkinson’s had lower levels of amyloid beta, tau and alpha synuclein in their spinal fluid. In addition, those with lower concentrations of tau and alpha synuclein had greater motor dysfunction. And early Parkinson’s patients with low levels of amyloid beta and tau were more likely to be classified as having the postural instability-gait disturbance- dominant (PIGD) motor type of disease, where falling, freezing, and walking difficulty are common.

“Biomarkers for Parkinson’s disease such as these could help us diagnose patients earlier, and we’ve now shown that the simultaneous measurement of a variety of neurodegenerative disease proteins is valuable,” said study senior author Leslie M. Shaw, PhD, professor of Pathology and Laboratory Medicine at Penn Medicine. Dr. Shaw and John Q. Trojanowski, MD, PhD, director of the Penn Udall Center for Parkinson’s Research, are co-leaders of the Bioanalytics Core for the Parkinson’s Progression Markers Initiative, an international observational clinical study sponsored by The Michael J. Fox Foundation for Parkinson's Research.

The team evaluated spinal fluid collected from baseline visits of the first 102 PPMI participants - 63 with early, untreated Parkinson’s disease and 39 healthy controls. The spinal fluid was evaluated for levels of five biomarkers: amyloid beta, total tau, phosphorylated tau, alpha synuclein and the ratio of total tau to amyloid beta. Spinal fluid measures of amyloid and tau are currently used in research to distinguish Alzheimer’s disease from other neurodegenerative diseases. In contrast to Alzheimer’s, where tau levels are higher than healthy controls, the study found that early Parkinson’s patients had lower levels of tau than healthy controls. One reason, researchers suggest, could be that interactions between tau and alpha synuclein may limit the release of tau into the cerebrospinal fluid of Parkinson’s patients.

“Through PPMI, we are hoping to identify subgroups of Parkinson’s patients whose disease is likely to progress at a different rate, as early as possible,” said Dr. Trojanowski. “Early prediction is critical, for both motor and dementia symptoms.”

The Parkinson’s PIGD motor subtype has been associated with a more rapid cognitive decline as well as greater functional disability. Using the biomarker test, this initial study found that levels of all spinal fluid biomarkers were lower in the PIGD motor subtype than other types of PD as well as healthy controls. In addition, amyloid beta and phosphorylated tau were at lower levels in the PIGD motor subtype, but were no different in tremor or indeterminate subtypes compared to normal controls.


Further Information

Join For Free

Access to this exclusive content is for Technology Networks Premium members only.

Join Technology Networks Premium for free access to:

  • Exclusive articles
  • Presentations from international conferences
  • Over 3,300+ scientific posters on ePosters
  • More than 4,900+ scientific videos on LabTube
  • 35 community eNewsletters


Sign In



Forgotten your details? Click Here
If you are not a member you can join here

*Please note: By logging into TechnologyNetworks.com you agree to accept the use of cookies. To find out more about the cookies we use and how to delete them, see our privacy policy.

Related Content

Single Molecule Detection of Contaminants, Explosives or Diseases
A technique that combines the ultrasensitivity of surface-enhanced Raman scattering (SERS) with a slippery surface invented by Penn State researchers will make it feasible to detect single molecules of a number of chemical and biological species from gaseous, liquid or solid samples.
Tuesday, January 12, 2016
Important Gene-Regulation Proteins Pinpointed by New Method
A novel technique has been developed and demonstrated at Penn State to map the proteins that read and regulate chromosomes.
Friday, January 20, 2012
Scientific News
Detecting Alzheimer's with Smell Test
Odour identification test may offer low-cost alternative for predicting cognitive decline and detecting early-stage Alzheimer’s disease.
Fighting Cancer Through Protein Pathways
Researchers have found a new drug target within a protein production pathway critical to regulating growth and proliferation of cells.
Uncovering Rhinovirus C Structure
Researchers have determined the structure of rhinovirus C. Their findings may aid the development of antiviral therapies and vaccines.
New Centre Offers Ultra-Speed Protein Analysis
UW-Madison researchers to establish development centre for next-gen protein measurement technologies.
Protein Nanocages Could Improve Drug Design and Delivery
HHMI scientists have designed and built 10 large protein icosahedra that are similar to viral capsids that carry viral DNA.
Virus Inspired Cell Cargo Ships
Virus-inspired container design may lead to cell cargo ships following construction of ten large, two-component, icosahedral protein complexes.
Protein Reinforces Growth of Damaged Muscles
Biologists have found a protein involved in stem cells that bolsters damaged muscle tissue growth - potential for muscle degeneration treatments.
Structure of Cold Virus Solved
Researchers have identified the structure of an elusive cold virus linked to child asthma and respiratory infections, providing the foundation for treating the virus.
New Protein Model Could Accelerate Drug Development
Stony Brook-led international research team creates ultra-fast approach to model protein interactions.
Researchers Can Control Genes Involved in Cancer
A new way to control the activity of a protein, that is often upregulated in cancer, has been discovered by Moffitt researchers through monoubiquitination mechanism.
Scroll Up
Scroll Down
SELECTBIO

SELECTBIO Market Reports
Go to LabTube
Go to eposters
 
Access to the latest scientific news
Exclusive articles
Upload and share your posters on ePosters
Latest presentations and webinars
View a library of 1,800+ scientific and medical posters
3,300+ scientific and medical posters
A library of 2,500+ scientific videos on LabTube
4,900+ scientific videos
Close
Premium CrownJOIN TECHNOLOGY NETWORKS PREMIUM FOR FREE!