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Scientists discover a powerful new antivenom hidden in rattlesnake blood

2 weeks 2 days ago
Researchers discovered that combinations of toxin-blocking proteins naturally found in rattlesnake blood can powerfully neutralize venom from several dangerous snake species. In lab tests, the mixtures were about 10 times more potent than a current commercial antivenom, pointing toward a new generation of nature-inspired snakebite treatments.

Your personality may be more genetic than scientists realized

2 weeks 2 days ago
More than 1,200 genetic variants have been linked to the Big Five personality traits, and many of the same variants are also associated with health, longevity, careers, income, and everyday habits. The findings reveal a surprisingly wide genetic connection between personality and life outcomes while showing that environment still plays a powerful role.

Ozempic and Wegovy may have an unexpected mental health benefit

2 weeks 2 days ago
Semaglutide, the drug behind Ozempic and Wegovy, may have benefits that extend well beyond weight loss and diabetes. In a large Swedish study of nearly 15,000 people with bipolar disorder, its use was linked to a 21% lower risk of psychiatric hospitalization. Researchers think effects on inflammation and brain-related biological pathways could help stabilize mood, though other GLP-1 drugs did not show the same association.

Puberty, pregnancy, and menopause show shared and distinct structural changes across the lifespan

2 weeks 2 days ago
The female brain undergoes substantial reorganization during major hormonal transitions, yet whether puberty, pregnancy, and menopause engage shared or distinct neuroplastic mechanisms remains unknown. We compared longitudinal structural brain changes across all three major hormonal life events using identical analytical methods within a single cohort framework (n = 1095), with stable control groups to control for normative developmental and aging trajectories. Both pre-to-post menarche and...
Sophie R van 't Hof

Adult primary whole-brain cultures from Thy1-aSyn mice (Line 61) retain Parkinson's disease-relevant phenotypes

2 weeks 2 days ago
Primary cultures from fetal or postnatal rodent brain are widely used to study alpha-synuclein (aSyn)-associated mechanisms but poorly reflect age-dependent neurodegenerative processes. We established primary whole-brain cultures from adult Thy1-aSyn (Line 61) mice overexpressing human aSyn and compared them with postnatal and wild-type cultures. Cultures were maintained for 21 days and characterized by electrophysiology, immunohistochemistry, gene expression analysis, and protein biochemistry....
Daniela Zalpanow

Cellular senescence as endocrine information failure in aging

2 weeks 2 days ago
Endocrine organs translate nutrient, stress and circadian cues into hormone outputs that coordinate whole-body physiology. Cellular senescence can distort this communication by changing endocrine-cell identity, stimulus-secretion coupling, secretory timing and local immune or paracrine signaling. Evidence is strongest in pancreatic β-cells and the adrenal zona fasciculata, where composite senescence phenotypes have been linked to endocrine dysfunction and modified by targeted perturbations....
Zheng Bi

Size-tailored nanoparticle-antibody conjugates overcome hepatic sequestration in Alzheimer's disease treatment

2 weeks 2 days ago
Antibody-based immunotherapy targeting amyloid-β (Aβ) is a promising approach for Alzheimer's disease (AD). However, its efficacy is limited by rapid hepatic sequestration, complement activation, and liver dysfunction. In this study, we synthesized low-immunogenic 450-nm functionalized mesoporous silica nanoparticles (PEG-MSN-1F12) by conjugating the anti-Aβ(42) monoclonal antibody 1F12 to polyethylene glycol-modified mesoporous silica nanoparticles to address these challenges. In APP/PS1 mice,...
Xuewei Du

LAPTM5 correlates with RPE senescence and subretinal fibrosis through the LAPTM5-WWP2-OPTN mitophagy cascade and cGAS/STING activation in a D-galactose-induced aging model

2 weeks 2 days ago
Retinal pigment epithelium (RPE) senescence acts as a core driver of subretinal fibrosis, a major irreversible pathological feature that exacerbates age-related macular degeneration (AMD). Mitophagy is essential for maintaining RPE homeostasis during aging. However, the upstream molecular mechanisms underlying mitophagy impairment in senescent RPE remain poorly defined. Here, we show that lysosomal-associated transmembrane protein 5 (LAPTM5) is significantly upregulated in human AMD specimens...
Xiaowei Yang

eIF5A and polyamines restrict mRNA levels in response to ribosome stalls

2 weeks 2 days ago
Obstacles to translation elongation stall ribosomes and allow deleterious proteins to accumulate, which threatens cellular health. Cells recognize and clear stalled ribosomes via several interrelated pathways, although the mechanisms by which cells distinguish stalled from normally elongating ribosomes and mount an appropriate response are incompletely understood. While recent work highlights how ribosome collisions help cells to recognize stalled ribosomes, how other factors contribute to...
Chloe M Wohlenberg

Epicenter mapping of cortical morphological dedifferentiation in type 2 diabetes mellitus using morphometric inverse divergence

2 weeks 2 days ago
CONCLUSION: The group-level spatial map showed exploratory correspondence with selected normative functional connectivity (FC)- and structural connectivity (SC)-based candidate profiles. Individualized profiles showed greater cross- sectional correspondence with the selected SC-based profile than with the FC-based profile, providing a network-informed description of diabetic brain alterations.
Taipeng Zeng