Sam's News — health — 2026-09-22¶

Health/Neuroscience¶

7.5 Brain dopamine damage identified as cause of long COVID fatigue¶

PET brain imaging at CAMH revealed long COVID damages dopamine-releasing neurons in the striatum, correlating dopamine loss patterns with specific symptoms: motivation loss, movement slowing, and memory difficulties. The finding opens potential treatment strategies targeting the dopamine system.

Long COVID affects approximately 5% of global population (~2 million people in Canada)
Lower ventral striatum dopamine linked to loss of motivation
Dorsal putamen dopamine reduction associated with slower movement
Caudate putamen dopamine loss connected to memory difficulties
No current evidence-based treatments exist for long COVID

Sources: ScienceDaily AI Web Searched, ScienceDaily — Health RSS

Biomedical Research¶

7 Stem cell transplants restore movement in mice after stroke¶

Researchers at the University of Zurich transplanted human neural stem cells into stroke-damaged brains one week post-stroke, where they survived, differentiated into neurons, regenerated tissue, restored motor function, and improved blood-brain barrier integrity over five weeks.

Transplanted cells survived and most transformed into neurons communicating with existing brain cells
Treatment restored motor function and improved blood vessels, inflammation, and blood-brain barrier integrity
Stroke affects approximately 1 in 4 adults over lifetime, with ~50% experiencing lasting disabilities such as paralysis or speech difficulty
Study addresses traditionally permanent brain damage with neural stem cell therapy

Sources: ScienceDaily AI Web Searched, ScienceDaily — Health RSS

Health¶

7 Genicular artery embolization offers alternative to knee replacement surgery¶

Genicular artery embolization (GAE), a minimally invasive outpatient procedure, reduces chronic knee osteoarthritis pain by blocking blood vessels associated with inflammation. Approximately 70% of patients experience significant pain reduction lasting two to four years, positioning GAE as a middle option for patients with mild to moderate osteoarthritis who have exhausted conservative treatments but are not yet ready for surgery.

GAE is minimally invasive outpatient procedure taking 1–2 hours
~70% of patients experience significant pain reduction (≥50% decrease)
Benefits last 2–4 years in responsive patients
Positioned between conservative treatments and total knee replacement surgery
Patients report pain reduction comparable to knee replacement with significantly fewer risks

Sources: ScienceDaily AI Web Searched, ScienceDaily — Health RSS

6.5 Caffeine disrupts sleep quality even without preventing sleep onset¶

EEG research shows caffeine reduces deep sleep brain waves even when people fall asleep normally, with individual sensitivity varying dramatically.

Sources: ScienceDaily — Health RSS

6 Trump administration drug affordability plan may provide windfall for Novo Nordisk¶

The White House's drug affordability initiative for Medicaid may offer a financial benefit to Novo Nordisk due to an apparent exception in the program's design.

Sources: STAT News RSS

Policy¶

6.5 HHS announces new initiatives to reduce animal testing in drug development¶

The Department of Health and Human Services has announced new strategies to accelerate the transition away from animal testing in medical drug development.

Sources: STAT News RSS

6 Congress opposes proposed political review panel for NIH grant approvals¶

Members of Congress express strong opposition to a plan creating a panel of political appointees to review NIH research grants.

Sources: STAT News RSS

6 Western pharma companies seek permission to maintain China drug development deals under new administration¶

Pharmaceutical companies are urging the Trump administration to allow them to continue collaborating with Chinese firms on drug candidates despite potential restrictions.

Sources: STAT News RSS

Health Policy¶

6 Insurance rarely covers integrative therapies proven to relieve cancer symptoms¶

Research demonstrates that integrative therapies reduce cancer pain, fatigue, anxiety, and nausea, yet insurance companies rarely provide coverage.

Sources: STAT News RSS

Funding¶

6 Major philanthropic donation accelerates multiple sclerosis research breakthroughs¶

The Mendoza family's donation is advancing multiple sclerosis research initiatives and scientific breakthroughs.

Sources: University of Miami Web Search