News
Exercise may protect brain volume, studies show

A new study suggests that the role exercise plays in maintaining insulin and body mass index levels may help protect brain volume and thus help stave off dementia.
The research is published in the April 13 online issue of Neurology, the medical journal of the American Academy of Neurology (ANN).
“These results may help us to understand how physical activity affects brain health, which may guide us in developing strategies to prevent or delay age-related decline in memory and thinking skills,” said study author Géraldine Poisnel, PhD, of Inserm Research Center in Caen, France.
“Older adults who are physically active gain cardiovascular benefits, which may result in greater structural brain integrity.”
In contrast, researchers found that the relationship between exercise and the metabolism of glucose in the brain was not affected by insulin or body mass index (BMI) levels.
Reduced glucose metabolism in the brain can been seen in people with dementia.
The study involved 134 people with an average age of 69 who had no memory problems.
The people filled out surveys about their physical activity over the past year. They had brain scans to measure volume and glucose metabolism.
Information was gathered on BMI and insulin levels as well as cholesterol, blood pressure and other factors.
People with the most physical activity had a higher total volume of grey matter in their brains than people with the least amount of physical activity, with an average of about 550,000 cubic millimetres (mm³) compared to about 540,000 mm³.
When researchers looked only at areas of the brain affected by Alzheimer’s disease, they found the same results.
Those with the most activity also had a higher average rate of glucose metabolism in the brain than those with the least amount of activity.
Higher physical activity was not associated with how much amyloid plaque people had in their brains. Amyloid plaque is a marker for Alzheimer’s disease.
Poisnel said more research is needed to understand the mechanisms behind these relationships.
“Maintaining a lower BMI through physical activity could help prevent disturbed insulin metabolism that is often seen in ageing, thus promoting brain health.”
The study does not prove that exercise protects brain volume. It only shows an association.
A limitation of the study is that people reported their own physical activity, so they may not remember it accurately.
The study was supported by the European Union’s Horizon 2020 Research and Innovation Program, Region Normandy and MMA Foundation of Entrepreneurs of the Future.
The American Academy of Neurology is the world’s largest association of neurologists and neuroscience professionals, with 38,000 members.
The AAN is dedicated to promoting the highest quality patient-centred neurologic care.
A neurologist is a doctor with specialised training in diagnosing, treating and managing disorders of the brain and nervous system such as Alzheimer’s disease, stroke, migraine, multiple sclerosis, concussion, Parkinson’s disease and epilepsy.
For more information about the American Academy of Neurology, visit AAN.com
Wellness
BioAge expands drug into diabetic macular oedema

BioAge Labs is expanding its lead drug candidate into diabetic macular oedema, with plans to start a phase 1b/2a trial in mid-2026.
The clinical-stage biotechnology company will test BGE-102, an oral therapy, in patients with the condition, which is one of the most common causes of vision impairment among people with diabetes.
Diabetic macular oedema occurs when persistently high blood sugar damages the small blood vessels in the retina, the light-sensitive tissue at the back of the eye, leading to fluid leakage and distorted vision.
While the condition is linked to diabetes, its progression is tied to chronic inflammation.
Current treatments focus on managing damage after it has begun. Patients often receive regular injections directly into the eye, sometimes monthly, to control swelling and preserve sight.
These therapies can be effective, but they are invasive, time-intensive and difficult to sustain over years.
Kristen Fortney is chief executive and co-founder of BioAge.
She said: “NLRP3 sits at the apex of this cascade, and BGE-102 offers the potential to deliver broader anti-inflammatory benefit in an oral formulation, which could meaningfully reduce treatment burden for patients with serious, sight-threatening conditions who currently require frequent intravitreal injections.”
BGE-102 is an oral NLRP3 inhibitor, designed to dampen inflammation at its source.
NLRP3 is a protein that drives inflammatory signalling and becomes increasingly active with age and metabolic stress.
When overactivated, it triggers signals that damage tissues throughout the body, including the retina.
What BioAge says makes BGE-102 notable in ophthalmology is its potential to reach the retina via oral dosing, a barrier many drugs struggle to cross.
If successful, this could reduce the treatment burden for patients who currently rely on frequent eye injections.
In early laboratory studies designed to mimic diabetic eye disease, BGE-102 helped keep the retina’s tiny blood vessels intact.
In studies examining ageing in the retina more broadly, blocking NLRP3 reduced the build-up of lipofuscin, a toxic waste material that accumulates in eye cells over time and is linked to degenerative vision loss, by roughly 80 per cent.
In an ongoing phase 1 trial, the drug has been well tolerated and reduced inflammatory signals in the body, including markers linked to cardiovascular and metabolic ageing.
The phase 1b/2a trial will test BGE-102 on its own and alongside existing treatments, aiming to show whether the drug calms the inflammation that damages vision over time.
Researchers will track changes in IL-6, a key inflammatory signal, within the eye, alongside measures of vision and retinal swelling. Results are expected in mid-2027.
The eye study will run alongside BioAge’s ongoing cardiovascular trial.
The company describes BGE-102 as a potential “pipeline in a pill”, targeting NLRP3-driven inflammation across cardiovascular, central nervous system and ocular diseases.
News
USC funds AI projects for Alzheimer’s trials

The USC Clinical Trial Recruitment Lab will fund four projects testing how AI can strengthen recruitment for Alzheimer’s trials.
The initiative, dedicated to accelerating and improving Alzheimer’s clinical trials, selected the projects from more than 30 applicants to explore digital approaches.
Alzheimer’s clinical trials are more complex, costlier and take longer than those in other therapeutic areas, despite the pressing need for new treatments.
The lab evaluates innovative recruitment strategies to improve access and representation in trials, with the goal of identifying scalable evidence-based recruitment practices.
The USC Clinical Trial Recruitment Lab is a collaboration between the USC Schaeffer Center for Health Policy and Economics and the USC Epstein Family Alzheimer’s Therapeutic Research Institute.
The four projects will explore the following strategies.
- Miriam Ashford at University of California, San Francisco will develop and test a generative AI voice agent to support remote informed consent and assess patient capacity for Alzheimer’s clinical trials.
- Erika Cottrell at OCHIN, a national network of community health centres, and Vijaya Kolachalama at Cognimark will integrate an AI-enabled diagnostic platform into primary care electronic health record workflows to support earlier identification and referral of patients.
- Andrew Kiselica at University of Georgia will establish a digitally enabled, trial-ready cohort of rural older adults to improve recruitment, participant selection and engagement.
- Raeanne Moore at University of California, San Diego will leverage electronic health record portals and digital cognitive assessments to accelerate prescreening and better match potential participants.
An estimated 5.6 million Americans are living with Alzheimer’s and related dementias, a number expected to increase dramatically in the coming decades as the population ages.
An extensive therapeutic development pipeline and new early-detection approaches, such as diagnostic blood tests and advanced digital tools, have the potential to reduce the burden of the disease.
However, fewer than one per cent of eligible individuals participate in Alzheimer’s therapeutic trials due to barriers that include limited patient awareness, health system resource constraints and lack of access to diagnostics, according to research from USC Schaeffer.
Certain populations at higher risk for the disease, including Black and Hispanic patients, remain underrepresented.
“We can only innovate as quickly as we can test new therapies,” said Dana Goldman, founding director of the USC Schaeffer Institute.
“That’s why it’s crucial we keep expanding the toolkit of evidence-based recruitment strategies for running faster, better trials.”
The lab previously funded six pilots, some of which have already yielded insights.
For example, one found remote blood collection could help identify potential participants, while another showed that offering a small gift card significantly increased enrolment in an online memory concerns registry.
“Faster and more effective recruitment is essential, and we’re excited to incorporate these solutions in an integrated way as part of our clinical trials,” said Paul Aisen, founding director of the USC Epstein Family Alzheimer’s Therapeutic Research Institute.
“As studies move earlier into pre-symptomatic disease, this opens the door to new recruitment paradigms, and continuing to push forward the science of recruitment will be critical to what comes next in Alzheimer’s research.”
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