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Low doses of weight loss drugs may slow ageing

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Microdoses of weight loss drugs like Ozempic could slow ageing and increase longevity, according to new research in mice.

The study found that exenatide, a drug with similar chemical make-up to Ozempic, produced molecular changes in mice that opposed typical patterns seen with ageing across multiple organs.

Scientists treated mice starting at 11 months of age with small doses of the drug for about 30 weeks, then compared tissue samples from brain, liver, kidney, muscle and fat.

Researchers from the Chinese University of Hong Kong measured levels of RNA and DNA modifications, proteins and metabolism-related molecules to assess how age-related molecular signatures had changed in each tissue.

The treated mice showed metabolic health consistent with younger animals, with their molecular “age-signature” significantly shifted to a younger-looking profile compared with untreated older mice.

Many of the drug’s positive effects appeared to involve brain activity, suggesting the brain acted as a hub influencing the ageing profiles of multiple organs throughout the body.

Exenatide and semaglutide (sold as Ozempic and Wegovy) are GLP-1 receptor agonists. These medicines mimic a naturally occurring hormone in the gut and brain that regulates appetite, helping people feel fuller for longer.

Originally developed for diabetes treatment, these drugs have surged in popularity for weight loss. A new trend has emerged online with some people reportedly taking very small doses for longevity, though health experts warn the anti-ageing effect has not been proven in humans.

“Our work has provided multifaceted evidence for a comprehensive body-wide anti-ageing strategy,” the researchers wrote. “Future longitudinal studies are necessary to explore whether GLP-1R agonism may complement other anti-ageing methods.”

The study examined multiple biological markers of ageing, including epigenetic modifications (changes to DNA that affect gene activity without altering the genetic code), protein levels and metabolic indicators across different tissues.

The findings showed consistent changes across many tissues that opposed typical ageing patterns. However, researchers emphasised several important limitations to their work.

The results were observed only in mice, not humans, meaning whether the drug has any real effect on human ageing remains unknown. The study was conducted on middle-aged mice, so the effects might not be the same in very old animals.

Additionally, while the drug appeared to induce many molecular signs of younger age across tissues, the study did not prove that actual biological ageing was reversed or that the mice lived longer.

GLP-1 receptor agonists work by binding to receptors that respond to the GLP-1 hormone. This binding triggers metabolic processes, including insulin release and appetite suppression, and potentially, as this study suggests, molecular changes linked to younger biological age.

The researchers hope their findings will lead to larger clinical trials and help in developing anti-ageing drugs. However, they stress that longitudinal studies tracking subjects over extended periods are necessary to determine whether these drugs could form part of a comprehensive anti-ageing strategy.

The growing interest in using diabetes and weight-loss drugs for longevity reflects wider trends in anti-ageing research, where scientists increasingly examine how existing medicines might have benefits for healthspan and lifespan.

Experts caution that people should not start taking these medicines for anti-ageing purposes based on animal studies alone, as human trials are needed to establish safety and efficacy for this use.

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French biotech raises €12m for osteoarthritis trial

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A French biotech has raised €12m to test whether GLP-1 drugs can modify osteoarthritis progression.

The funding will advance 4Moving Biotech’s lead programme, 4P004, toward a phase 2a proof-of-concept readout in knee osteoarthritis, a joint disease that causes pain and stiffness.

Despite affecting more than 600 million people worldwide, no therapy approved in Europe or the US has yet been shown to slow or modify disease progression in osteoarthritis.

4Moving Biotech is testing whether GLP-1 receptor agonists, drugs best known for diabetes and obesity, can succeed where others have fallen short.

“With this closing in place, we are well equipped to reach the next value-creation milestone by delivering robust phase 2a data and reaching a proof-of-concept inflection point,” said Luc Boblet, chief executive of 4Moving Biotech.

Rather than systemic administration, the company is testing whether GLP-1 biology can be made relevant to osteoarthritis by acting directly in the joint, targeting local inflammation and tissue responses that systemic approaches have repeatedly failed to address.

“By acting directly in the joint, 4P004 tackles pain, inflammation and tissue damage through GLP-1-mediated pathways,” said professor Francis Berenbaum, the company’s chief medical officer.

The study is designed to assess “dual efficacy: symptom relief and synovial health improvement via contrast-enhanced MRI,” which images the joint lining, with topline results expected in the second half of 2026.

The round was secured from private investors and family offices investing directly into 4Moving Biotech, a subsidiary of 4P-Pharma, and combines equity with loans, a structure the company says is aligned with long-term value creation.

It follows a €7.6m France 2030 i-Démo grant awarded last year and coincides with the transatlantic expansion of the INFLAM-MOTION phase 2a study to the US.

Founded in 2020 as a spin-off from 4P-Pharma, 4Moving Biotech has now raised around €30m in total, combining private capital with non-dilutive public funding.

The broader landscape for disease-modifying osteoarthritis drugs offers little room for overconfidence.

A 2025 review of phase two and three osteoarthritis trials found that while “many DMOADs have progressed to clinical trials, very few have made a significant impact and none have been approved for clinical use.

Reviewing eleven candidates tested between 2010 and 2024, including small molecules, biologics and cell or gene-based therapies, authors conclude that failure has been driven less by any single mechanism than by the difficulty of demonstrating truly disease-modifying benefit.

Several programmes reported statistically significant effects on either pain or joint structure, but rarely both.

The review notes that “the clinical relevance of a marginal increase in one without the other remains unclear,” warning that structural effects without symptom relief may be clinically meaningless, while pain relief without structural protection could even accelerate disease progression.

Over the past decade, major programmes at Pfizer, Eli Lilly, AbbVie, GlaxoSmithKline and Sanofi have been discontinued or deprioritised after failing to deliver regulator-acceptable evidence of disease modification.

In 2020, Unity Biotechnology reported phase two data showing that its senolytic candidate UBX0101, developed as a disease-modifying therapy for knee osteoarthritis, failed to deliver clinically meaningful improvements in pain or joint structure.

Unity subsequently discontinued its osteoarthritis programme, exited the field entirely and ceased operations in 2025.

The phase 2a readout will be the point at which the GLP-1 approach in osteoarthritis either earns its next chapter or joins a long list of programmes that fell short.

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Test predicts dementia risk years earlier

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An EEG test can identify dementia risk five to seven years before progression to mild cognitive impairment or Alzheimer’s dementia, new research suggests.

Using EEG data, which measures the brain’s electrical activity, from older adults with only subjective memory concerns, the longitudinal study found this non-invasive test can flag functional changes long before standard tools detect disease.

Researchers collected baseline resting EEG recordings from 88 older adults who had subjective cognitive impairment (self-reported decline without a clinical diagnosis of mild cognitive impairment, early memory problems or dementia).

The study was conducted by BrainScope, a commercial-stage neurotechnology company in Maryland, US, which applies artificial intelligence and computational neuroscience to brain electrical signals.

Participants then received annual clinical assessments and staging of cognitive decline. Over time, some progressed to mild cognitive impairment or dementia, while others remained cognitively normal.

Using BrainScope’s proprietary EEG-based biomarker platform, researchers identified distinct brain-activity patterns at the initial visit that accurately predicted future decline.

BrainScope’s EEG biomarker achieved an area under the curve (AUC) of 0.90, a measure of diagnostic accuracy, and performance was validated across independent international cohorts.

The findings suggest that with BrainScope’s signal processing and AI-enabled analytics, EEG could serve as a rapid, affordable and non-invasive assessment to identify Alzheimer’s-related brain dysfunction years before meaningful memory loss.

Early identification matters because by the time traditional imaging detects Alzheimer’s pathology, significant and often irreversible neurological damage may already have occurred.

Identifying risk earlier also fits a fast-evolving therapeutic landscape in which many disease-modifying therapies and prevention trials require people to be found years before conventional diagnosis.

Earlier awareness can help individuals and families pursue evidence-based lifestyle changes, proactive care planning and research participation, shifting care from reactive management to earlier intervention.

“The rapid evolution of Alzheimer’s therapeutics demands equally innovative biomarkers.” Howard Fillit, co-founder and chief science officer of the Alzheimer’s Drug Discovery Foundation, said.

“As the field moves towards more complex, combination therapy strategies and precision prevention, tools like BrainScope’s will play a critical role in early risk identification and enabling a tailored approach to treatment.” Fillit said.

Key funding for the biomarker’s development was provided by the Alzheimer’s Drug Discovery Foundation, whose early support BrainScope credits as instrumental in achieving this milestone.

The foundation has a longstanding record of advancing Alzheimer’s diagnostics, including early support for technologies such as the first amyloid PET scan and the first blood-based biomarker test for the disease.

“At BrainScope, our mission has always been to translate the brain’s electrical signals into clinically meaningful insights and build the platform that becomes the brain’s vital sign,” Matt Adams, chief executive of BrainScope, said.

“This publication in Scientific Reports validates years of research using EEG to detect functional brain changes in normal elderly with subjective cognitive complaints,” Leslie Prichep, chief scientific officer of BrainScope and first author of the study, said.

“The importance of identifying risk of future cognitive decline, long before structural damage occurs, can have significant impact on brain health in the elderly early enough to meaningfully change outcomes.”

BrainScope is expanding its AI-enabled EEG platform into new clinical indications, including neurodegenerative diseases and stroke.

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Harbor Health acquires dementia care startup Rippl

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Harbor Health has acquired dementia care startup Rippl; terms were not disclosed.

Founded in 2021, Rippl provides specialised dementia care and support, including personalised care plans, medication assessments and 24/7 access to care navigators and licensed clinicians.

The Seattle-based company aims to help seniors with dementia stay at home and reduce emergency department visits. It serves multiple states and works with partners such as the Alzheimer’s Association.

Rippl’s platform will be integrated into Harbor Health’s broader healthcare services for chronic conditions.

Harbor Health, founded in 2022, pairs healthcare with insurance plans designed to better align benefits and clinical guidance.

“We couldn’t be more excited to begin an entirely new chapter of growth and development as we join the Harbor team with an ambition to set the standard for smarter, more effective and lower cost dementia care,” wrote Kris Engskov, Rippl’s co-founder and chief executive, in a LinkedIn post.

Engskov previously led Bellevue, Washington-based Aegis Living as president and is a former longtime executive at Starbucks.

Other Rippl co-founders include Inca Coman, a venture partner at ARCH Venture Partners, and Robert Nelsen, managing director at ARCH.

Rippl raised a US$23m investment round in 2024 and a separate US$32m round in 2022.

In a press release announcing the acquisition, Rippl said its investors are “making a new commitment to the combined company.”

Its existing backers include Kin Ventures, ARCH Venture Partners, General Catalyst, GV, F-Prime Capital, JSL Health and Mass General Brigham Ventures.

Harbor Health raised US$130m in September.

Under the acquisition, Rippl’s services will continue to be available to people receiving care through Harbor Health and affiliated clinics.

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