Aggregator

Agency says it has “resolved” questions about KBR winning an $8 billion contract

The Simons Observatory in Chile will will hunt for galaxy clusters and signs of cosmic inflation

A promising new treatment for knee arthritis uses tiny, dissolvable particles to block abnormal blood vessels, easing inflammation and pain without joint replacement surgery. In a study of 194 patients, 80% experienced clinically meaningful pain relief lasting at least 12 months.

A new study reveals that people draw a surprisingly sharp line between human consciousness and artificial intelligence, even when both behave identically. Researchers found that participants considered even the most responsive AI less conscious than the least responsive human. Yet when asked about "awareness" instead, people judged humans and AI much more similarly.

Scientists have discovered that the body's cellular recycling system behaves very differently during aging than previously believed, with higher activity sometimes linked to worse physical health. A small study suggests that even gentle exercise could help restore more youthful cellular recycling patterns in older adults.

A 165-million-year-old fossil has revealed an extraordinary Jurassic predator that may help explain how mammals developed one of their most important evolutionary advantages. Although only 20 inches long, Megacauda sungei was a heavyweight among early mammal relatives, swimming through ancient waterways and hunting prey with specialized teeth. Its advanced swallowing anatomy reveals an early step toward the ability to safely nurse on milk, a key development in mammalian evolution.

Alzheimer's disease (AD) is characterized by early tau pathology in subcortical neuromodulatory nuclei, followed by progressive cortical tau accumulation; however, the mechanisms linking subcortical dysfunction to cortical tau pathology remain unclear. Using multimodal neuroimaging data from the ADNI cohort, we examined how infra-slow ( < 0.1 Hz) global brain (i.e., gBOLD) activity is related to the volume of the nucleus basalis of Meynert (NbM) and cortical tau accumulation in the early stages...

No abstract

No abstract

Obesity and diabetes are well-established risk factors for Alzheimer's disease (AD), implicating metabolic dysfunction in AD pathogenesis. Sleeve gastrectomy (SG) is among the most effective metabolic interventions available, yet its impact on AD progression remains poorly understood. We hypothesized that SG performed early in life would improve metabolic health, attenuate AD pathology, and preserve cognition in a transgenic AD mouse model. Five-week-old female 3xTg-AD mice were preconditioned...

Targeting microglia with adeno-associated viruses (AAVs) remains challenging because of inefficient transduction, off-target expression, and inconsistent payload performance. Here, we develop an integrated, Cre-independent AAV platform that combines a compact 446-bp microglia-specific regulatory element (MSRE), a high-yield AAV2/9.m capsid, microRNA-mediated neuronal de-targeting, and a microglia-tailored codon-optimization strategy. Following direct intracranial delivery, the optimized vector...

With the global aging population, age-related neurodegenerative diseases and cerebrovascular diseases have become major public health challenges. As a modifiable lifestyle strategy, dietary intervention shows significant potential in delaying brain aging and reducing the risk of neurodegenerative and cerebrovascular diseases. Caloric restriction (CR) and dietary restriction (DR), two important nutritional intervention approaches, exhibit substantial neuroprotective potential through multiple...

Chromatin structure is essential for gene regulation and genome stability, as neurons must preserve their 3D genome organization throughout life. This structure gradually deteriorates with aging and is further disrupted in neurodegenerative diseases. To investigate whether aging and neurodegeneration share early chromatin changes or diverge, we perform Hi-C on cortical neurons from adult, aged, and brain-specific SIRT6-knockout (S6-KO) mice and compare them to the previously published Hi-C data...

Type 2 diabetes (T2D) and obesity are highly prevalent among older adults and associated with increased Alzheimer's disease and related dementia (ADRD) risk, but underlying mechanisms linking T2D and obesity to cognitive impairment remain partially understood. Quantitative susceptibility mapping (QSM)-derived oxygen extraction fraction (OEF) provides a noninvasive MRI-based marker of cerebral metabolism and may capture early alterations in brain physiology. In this single-center, cross-sectional...

Due to increase in life expectancy, aged population is growing exponentially, globally which has impact on human health as well as biomedical research. Research highlighted coordination between aging and arthritis where aging is the underlying hallmark of arthritis progression. Despite knowing the route of pathogenesis regarding most prevalent joint disorders like Osteoarthritis (OA) and rheumatoid arthritis (RA); efficient curable approach is still challenging. Worldwide 7-8% populations suffer...