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Brain aging may be detected decades before symptoms appear, with links to gut health

A new UCLA study has found a connection between brain aging and gut biology, suggesting that people's brains may be aging decades before symptoms appear. The study, published in eBioMedicine, analyzed brain scans and stool samples to identify a link between brain communication patterns, gut bacteria, and brain aging.

SourceUniversity of California - Los Angeles Health Sciences·JournalEBioMedicine·TypeExperimental study·DateSep 10, 2026

Study uses living human brain tissue to map how electric stimulation affects neurons, genetic activity

Researchers used real human brain tissue samples to test the underlying mechanisms of deep brain stimulation. They found that brain cells became more synchronized in communicating, similar to memory formation, while altering gene expression across different types of brain cells.

SourceUniversity of California - Los Angeles Health Sciences·JournalNature·TypeExperimental study·DateAug 5, 2026

Topline results from LiBBY trial show THC/CBD combination significantly reduces agitation for people with dementia at end of life

A Phase 2 clinical trial shows that a THC/CBD combination significantly reduces agitation in hospice-eligible people with dementia. The study, conducted across multiple US sites, achieved its primary and key secondary endpoints, demonstrating the efficacy of this treatment approach for end-of-life agitation.

The digital therapy helping dementia carers

A digital therapy platform, iACT4CARERS, has been shown to reduce anxiety and depression in dementia carers after three and six months. The study, which involved almost 500 volunteers, found that carers using the platform had lower levels of anxiety and depression compared to those receiving usual care alone.

SourceUniversity of East Anglia·JournalThe Lancet Regional Health - Europe·TypeRandomized controlled/clinical trial·DateJul 11, 2026

Placental insufficiency during pregnancy is associated with memory alterations years after childbirth

A study by the Sant Pau Research Institute found that placental insufficiency during pregnancy is associated with higher risk of memory alterations years after childbirth. Women with angiogenic imbalance had a higher frequency of memory problems, even after accounting for other clinical factors.

SourceInstitut de Recerca Sant Pau (Sant Pau Research Institute)·JournalAmerican Journal of Obstetrics and Gynecology·TypeObservational study·DateApr 29, 2026

Anti-amyloid Alzheimer’s drugs show no clinically meaningful effect

A new Cochrane review of 17 clinical trials found that anti-amyloid Alzheimer's drugs have no significant impact on cognitive decline or dementia severity, but may increase the risk of brain swelling and bleeding. The evidence suggests that these drugs are unlikely to provide clear benefit to patients.

SourceCochrane·JournalCochrane Database of Systematic Reviews·TypeSystematic review·DateApr 15, 2026

Scientists reverse brain aging, with a nasal spray

Researchers developed a nasal spray that reversibly reduces brain inflammation, restores cellular power plants, and improves memory. The treatment bypasses the brain's protective shield through intranasal delivery, suppressing chronic inflammation and promoting successful brain aging.

SourceTexas A&M University·JournalJournal of Extracellular Vesicles·DateApr 14, 2026

Cumulative lead exposure linked to increased Alzheimer’s and dementia risk, University of Michigan study finds

Researchers at the University of Michigan School of Public Health found a strong association between bone lead concentrations and increased risk of dementia. The study analyzed data from over 30 years of follow-up and estimated cumulative lifetime exposure to lead using machine learning algorithms.

SourceUniversity of Michigan School of Public Health·JournalAlzheimer’s & Dementia·DateFeb 12, 2026

Muscle protein linked to exercise opens new way to treat Alzheimer’s

Researchers at Florida Atlantic University have discovered a potential new treatment for Alzheimer's disease by targeting muscle protein Cathepsin B. The study found that increasing Ctsb in muscle tissue may offer protection against the effects of AD and promote brain cell growth, restoring protein balance and rebalancing brain activity.

SourceFlorida Atlantic University·JournalAging Cell·TypeExperimental study·DateNov 18, 2025

Deep sleep supports memory via brain fluid and neural rhythms

Researchers have discovered that deep sleep plays a crucial role in controlling cerebrospinal fluid dynamics, which is essential for clearing waste from the brain. During slow-wave sleep, changes in cerebrospinal fluid signals are time-locked to slow brain waves and other neural events.

SourceRIKEN·JournalProceedings of the National Academy of Sciences·DateOct 16, 2025

Astrocytes are superstars in the game of long-term memory

A new study reveals that astrocytes, a type of glial cell, are responsible for stabilizing memories through repeated engagement. The researchers found that Fos activity in astrocytes only occurs during recall, and that these cells can be activated to produce stable memories.

SourceRIKEN·JournalNature·DateOct 15, 2025

Alzheimer’s erodes brain cells’ control of gene expression, undermining function, cognition

A new study reveals that Alzheimer's progression is characterized by a breakdown of epigenomic stability, leading to compromised compartmentalization and the loss of gene regulation. The research provides insights into the molecular mechanisms driving disease progression and resilience, shedding light on potential new treatments.

SourcePicower Institute at MIT·JournalCell·TypeExperimental study·DateSep 2, 2025

Unlocking the brain’s filing cabinet

Researchers at USC have developed a new understanding of how the human brain organizes its visual memories by sorting them into categories. The study, published in Advanced Science, used human patient brain recordings and machine learning to decode the category of visual image being recalled from precise neural timing.

SourceUniversity of Southern California·JournalAdvanced Science·TypeComputational simulation/modeling·DateJul 24, 2025

New study validates insulin nasal spray to deliver Alzheimer’s drug directly to the brain

A groundbreaking brain imaging study confirms intranasal insulin safely reaches key memory regions in older adults with Alzheimer's. The research reveals differences in uptake among individuals with early cognitive decline, paving the way for personalized treatment approaches.

SourceAtrium Health Wake Forest Baptist·JournalAlzheimer s & Dementia Translational Research & Clinical Interventions·DateJul 23, 2025

Study finds political instability, environmental conditions, and social inequality accelerate aging

A global study of 161,981 participants across 40 countries reveals that air pollution, social inequality, and weak democratic institutions accelerate aging. BBAGs, a novel measure of accelerated aging, show that exposure to toxic air, political instability, and economic inequality can age you several years faster.

SourceTrinity College Dublin·JournalNature Medicine·TypeComputational simulation/modeling·DateJul 14, 2025

Knowing your Alzheimer’s risk may ease anxiety but reduce motivation for healthy habits

A study published in Alzheimer's & Dementia found that learning one's Alzheimer's risk can decrease negative emotions like depression and anxiety, but also leads to decreased motivation for maintaining healthy lifestyle changes. Researchers emphasize the importance of personalized disclosure processes to sustain healthy behaviors.

SourceRutgers University·JournalAlzheimer’s & Dementia·TypeSurvey·DateMay 7, 2025

UTA professor explores healing power of music

Dr. Rhonda Winegar investigates the effectiveness of music therapy in supporting neurological care, including its ability to reduce anxiety and depression in Alzheimer's patients. Her research also highlights its potential to regulate heart rate and blood pressure, as well as improve motor function in individuals with Parkinson's disease.

SourceUniversity of Texas at Arlington·JournalThe Journal for Nurse Practitioners·TypeLiterature review·DateApr 16, 2025

Scientists identify key enzyme in Alzheimer’s disease that links brain inflammation to memory loss

Researchers found that SIRT2, a previously unknown enzyme, plays a key role in excessive GABA production associated with Alzheimer's disease. This process leads to brain inflammation and memory impairment. By targeting SIRT2, scientists can selectively block its harmful effects on memory without affecting other brain functions.

SourceInstitute for Basic Science·JournalMolecular Neurodegeneration·TypeExperimental study·DateApr 14, 2025