netbook
desktop
mobile
tablet-landscape
tablet
phone-landscape
phone
Research to Prevent Blindness

IN THE FUTURE, ALZHEIMER’S MAY BE PREDICTED DURING EYE EXAMS

RPB-funded researchers at Washington University School of Medicine in St. Louis (WUSTL) have found a correlation in 30 older patients between retina thinning and elevated levels of tau and amyloid proteins that are the hallmark of Alzheimer’s disease.  They made their discovery by using optical coherence tomography angiography (OCTA) to examine the patients’ retinas. 

This first-of-its-kind research was published in August 23, 2018 in JAMA Ophthalmology.  The study was funded by an RPB Unrestricted Grant to the WUSTL Department of Ophthalmology. 

eye exam to screen for Alzheimer's

Gregory Van Stavern, MD, (seated) and Rajendra Apte, MD, PhD, examine a patient’s eyes, using technology to screen for Alzheimer's disease during an eye exam.

 

Photo credit: Matt Miller

Participants in the study were patients in The Memory and Aging Project at Washington University’s Knight Alzheimer’s Disease Research Center. About half of those in the study had elevated levels of amyloid or tau as found by PET scans or in cerebrospinal fluid.  This suggests that although they didn’t have symptoms, they likely would develop Alzheimer’s. In the other study subjects, PET scans and cerebrospinal fluid analyses were normal.

Of the patients studied, 17 had abnormal PET scans or lumbar punctures (to test cerebrospinal fluid), and all had retinal thinning and significant areas without blood vessels in the centers of their retinas.  Patients with normal PET scans and lumbar punctures had retinas that appeared normal.  

“In the patients with elevated levels of amyloid or tau, we detected significant thinning in the center of the retina,” said co-principal investigator Rajendra S. Apte, MD, PhD, the Paul A. Cibis Distinguished Professor of Ophthalmology and Visual Sciences. “All of us have a small area devoid of blood vessels in the center of our retinas that is responsible for our most precise vision. We found that this zone lacking blood vessels was significantly enlarged in people with preclinical Alzheimer’s disease.”

The eye test used in the study, which is similar to technology found in many ophthalmologists’ offices, shines light into the eye, allowing the physician to measure retinal thickness, as well as thickness of the fibers in the optic nerve.  In this study, researchers added angiography, which allows physicians to distinguish red blood cells from other tissue in the retina.

Dr. Apte has been a recipient of the RPB Nelson Trust Award for Retinitis Pigmentosa (2016); the RPB Physician Scientist Award (2014); and the RPB Career Development Award (2004).  

While this was a preliminary study, Dr. Apte and colleagues believe that OCTA may become an inexpensive and noninvasive way to determine who should undergo more extensive Alzheimer’s testing.

READ THE FULL NEWS RELEASE FROM WUSTL

 

Related News: Feature Story, For the Media, Top Story

scEYEnce campaign image

RPB and Partners Launch the scEYEnce Campaign

This new media campaign shines a spotlight on the powerful benefits of vision research.

Read More

 
David Williams

RPB and Association of University Professors of Ophthalmology Announce 2021 Recipient of RPB David F. Weeks Award for Outstanding Vision Research

David Williams, PhD, is recognized for ground-breaking contributions to the field of vision research.

Read More

 
Michael Chiang

Former RPB Grantee Dr. Michael Chiang Named Director of National Eye Institute

Dr. Chiang is a respected scientist, clinician and leader in vision research.

Read More

 
RPB logo

Research to Prevent Blindness Expands Career Development Award

RPB is increasing both the amount of funding and the number of awards funded through its flagship grant in order to better support early-career vision scientists.

Read More

 
RPB logo

Research to Prevent Blindness and Allergan Foundation Announce New Partnership to Support Early-Career Vision Researchers

The organizations announce new grants to increase funding for innovative research from early-career vision scientists.

Read More

 
RPB logo
Watch The Video

Research to Prevent Blindness Celebrates 60th Anniversary

For the past 60 years, RPB has funded groundbreaking research to prevent, treat and cure all conditions that damage or destroy sight.

Read More

 

Subscribe

Get our email updates filled with the latest news from our researchers about preventing vision loss, treating eye disease and even restoring sight. Unsubscribe at any time. Under our privacy policy, we'll never share your contact information with a third party.