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Linus Pauling was widely mocked for claiming that vitamin C could fight cancer, especially after trials using vitamin C pills showed no benefit. Researchers now know that intravenous vitamin C reaches vastly higher concentrations and can behave more like an experimental cancer drug than an ordinary supplement. Early studies suggest it may damage vulnerable cancer cells, reduce treatment side effects, and possibly improve outcomes for some patients.

Blocking the glycine transporter SLC6A20 restored important brain signaling and improved social, communication, and repetitive behaviors in autism-related mouse models. The treatment also worked in human brain organoids and showed lasting effects in adult mice, suggesting the brain may remain more treatable later in life than previously thought.

Modeling suggests infamous “Kessler syndrome” would make the swarms unsustainable

A ten-month Antarctic experiment found that astronauts may struggle not only with loneliness but also with spending too much time around the same people. Frequent contact was linked to greater tension and mistrust, while the crew increasingly divided into cultural and language-based groups.

Chronic oxidative stress has long been implicated in renal pathologies, but whether sustained oxidative damage primarily promotes chronic kidney disease (CKD) or tumorigenesis remains unclear. To address this question, we investigated the long-term effects of oxidative stress on human embryonic kidney (HEK293T) cells chronically exposed to a low dose of hydrogen peroxide (H(2)O(2), 50 μM H(2)O(2)) for 9 months, generating two adapted lines, 50R30 and 50R45. These cells exhibited enhanced...

Aging is a multifactorial process affects different tissues and organs and is modulated by genetic and environmental factors. In aging, the frequency of DNA repair errors and genomic instability are augmented. Depletion of endogenous antioxidant capacity during aging promotes the development of oxidative stress which triggers oxidative stress-induced DNA injury. Brain aging is manifested by cognitive impairment and memory disorders. Development of neuronal senescence is the major pathway in the...

Cognitive aging is shaped by genetic variation, environmental factors, and health-related conditions. Until now, it is largely unclear why some individuals maintain their cognitive function, and others show progressive cognitive decline. This study uncovered determinants of distinct cognitive aging trajectories in the older population. To approach the inter-individual variability in cognitive aging, we clustered n = 696 dementia-free individuals from the prospective TREND study based on their...

It has been hypothesized that age‑related declines in skeletal muscle and vascular function in females may be partly estrogen‑dependent. This study investigated skeletal muscle protein expression of estrogen receptor α (ERα), estrogen receptor β (ERβ), and G protein-coupled estrogen receptor 1 (GPER1), and their association with proteins involved in redox regulation and vascular function, in relation to age, menopausal status, and lifelong physical activity. Skeletal muscle biopsies were...

The dominantly inherited Flemish mutation-an A692G substitution in the amyloid precursor protein, corresponding to an A21G change in amyloid-β (Aβ)-causes a rare, early-onset form of Alzheimer disease characterized by pronounced cerebral amyloid angiopathy and unusually large senile plaque cores. Here, we report cryo-electron microscopy structures of amyloid filaments extracted from the postmortem parietal lobes of two individuals representing the only two known Flemish pedigrees worldwide....

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Microenvironment remodelling impacts tumour growth and metastasis, but whether remodelling promotes pre-malignant clonal fitness remains unknown. Here, using single-cell RNA-sequencing of the bone-marrow microenvironment in a mouse model of DNMT3A-mutant clonal haematopoiesis (CH), we identify mesenchymal stromal cells (MSCs) in a molecular state of cellular senescence. Elevated bone-marrow MSC senescence is also observed in humans with CH driven by several common somatic mutations. MSC...

Haemoglobin is a ferrous iron (Fe^(2+))-containing intracellular protein that is crucial for multiple homeostatic functions, including transport of oxygen and carbon dioxide, acid-base buffering and cellular signalling through nitric oxide oxidation and nitrite reduction. When erythrocyte membranes are disrupted, a process known as haemolysis that is caused by either disease or an exogenous stressor, haemoglobin is liberated into the plasma. This plasma free haemoglobin is highly pathogenic,...

CONCLUSION: The current evidence does not establish a definitive APOE ε4-specific preventive effect of PA. Future studies may be most informative if they target earlier-stage, low-active, or metabolically at-risk APOE ε4 carriers using objective PA measures and proximal vascular, metabolic, imaging, or blood-based biomarker outcomes.

A new wearable patch may help people reach REM sleep faster and remain there longer without medication or surgery. In a study of 28 participants, the device shortened the time to REM by 43 minutes and extended it by about 16 minutes. Researchers also observed signs of improved stress regulation and changes in brain circuits tied to emotion.

Beginning around age 50, the brain’s memory center appears to lose many of its longtime immune cells and replace them with more inflammatory ones. This surprising shift may help explain how normal aging sets the stage for Alzheimer’s disease and dementia.

Study of mitochondria suggests new treatment strategy for Alzheimer’s and other diseases

A long-term brain study found that common risks such as smoking, high blood pressure, heart disease, and high blood lipids were strongly linked to damage associated with vascular dementia. The findings suggest that healthier lifestyle choices could help delay dementia by reducing several harmful brain changes at once.