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Rethinking dopamine’s role in movement and Parkinson’s disease

A McGill-led study is challenging a popular theory about how dopamine drives movement, a discovery that could shift how scientists think about Parkinson's disease treatments.

17 Dec 2025

New clinical trial offers hope for patients with advanced “dry” age-related macular degeneration

Age-related macular degeneration, the leading cause of vision loss and blindness for Americans 65 and older, is a progressive disease affecting central vision.

17 Dec 2025

Slower cognitive reaction time associated with higher levels of frailty

Frailty is a syndrome resulting from age-related decline across multiple organ systems. A new study, conducted at the University of Jyväskylä, Finland, shows that slower reaction time and lower response accuracy in cognitive tasks are associated with higher levels of frailty.

17 Dec 2025

Parasports offer multiple benefits for individuals with cerebral palsy

A review in Developmental Medicine & Child Neurology summarizes the multiple benefits of sport participation for people with cerebral palsy.

17 Dec 2025

Severe weather exposure increases long-term mortality risk in older adults

Severe weather events have long-term health consequences for vulnerable older adults, according to a study in the Journal of the American Geriatrics Society based on data following Hurricane Harvey.

17 Dec 2025

Early exposure to child care tax credits has mixed long-term health effects on children

The US Child and Dependent Care Tax Credit (CDCTC), which helps offset a portion of child or dependent care expenses, requires that both parents in married households, or the primary caregiver in single-parent and divorced households, participate in paid employment.

17 Dec 2025

Lysophosphatidylcholines show gene-dependent effects in early Alzheimer’s disease

A new study presents robust evidence on the role of lysophosphatidylcholines (LPCs) in the onset of Alzheimer's disease. Researchers discovered that LPCs-compounds that transport a variety of healthy fatty acids to the brain-either promote Alzheimer's or protect against it, depending on a person's genetics.

17 Dec 2025

Stress may help explain why patients with depression are at higher risk of cardiovascular disease

Patients with depression are at higher risk of cardiovascular disease, and a new study suggests that stress may help explain why.

17 Dec 2025

Hyperphosphorylated tau may help protect the brain from infection

One of the main proteins that contributes to Alzheimer's disease is called phospho-tau (p-tau). When p-tau gets too many phosphate groups attached to it (a process called hyperphosphorylation), it starts to stick together and form clumps called "tangles" inside of brain nerve cells.

17 Dec 2025

Brief light-intensity exercise improves executive function and mood in children

In modern society, physical inactivity and sedentary behavior have become common issues globally. This trend is also growing among children, raising concerns for their mental and physical health.

17 Dec 2025

Baloxavir reduces flu-related hospitalizations more than oseltamivir

A study reveals baloxavir outperforms oseltamivir in reducing hospitalization rates for influenza, highlighting its clinical advantages in outpatient settings.

17 Dec 2025

Sitting harms blood vessel function, but cocoa flavanols can stop it

This study shows that cocoa flavanols can preserve endothelial function during sitting, suggesting dietary strategies to mitigate cardiovascular risks.

17 Dec 2025

Benefits and drawbacks of grandparental childcare uncovered in new study

Research published in Health Economics indicates that regular childcare provided by grandparents can ease the pressures on parents but may have some negative impacts on children's health.

17 Dec 2025

Researchers uncover how a gene influences cell size across various cell types

What keeps our cells the right size? Scientists have long puzzled over this fundamental question, since cells that are too large or too small are linked to many diseases. Until now, the genetic basis behind cell size has largely been a mystery.

17 Dec 2025

Early life gut microbiome crucial for immune system development

Antibiotics are powerful treatments that have saved countless lives over the course of decades. New findings from Scripps Research have identified a way to preserve healthy immune development even when infants need antibiotic treatment.

17 Dec 2025

Urine-based microRNA clock predicts biological aging without a blood test

Researchers developed and validated a non-invasive urinary microRNA aging clock using extracellular vesicle miRNAs from more than 6,000 adults. The model predicts age with about 4 to 5 years error and links accelerated aging signals to type 2 diabetes.

16 Dec 2025

How Traditional Chinese Medicine may reshape the gut microbiome to ease insulin resistance in PCOS

This review synthesizes evidence that gut microbiota dysbiosis contributes to insulin resistance and symptom severity in polycystic ovary syndrome through impaired barrier function, inflammation, and altered microbial metabolites. It evaluates how Traditional Chinese Medicine may modulate these pathways while highlighting major gaps in clinical validation, safety, and standardization.

16 Dec 2025