Deep beneath Antarctica’s ice, scientists have uncovered a geological archive that could reshape predictions of future sea-level rise. Working roughly 700 kilometers from the closest Antarctic research stations, the team drilled through 523 meters of solid ice at Crary Ice Rise, located along the edge of the West Antarctic Ice Sheet. Beneath the ice, they […]
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Scientists Drill 523 Meters Through Antarctic Ice, Uncovering 23 Million Years of Climate Secrets – Science News
Ancient DNA Uncovers Chilling Truth Behind Europe’s Prehistoric Mass Killing – Science News
A 2,800-year-old mass grave in Serbia reveals a chilling pattern: women and children deliberately targeted, most unrelated to one another, and buried in a ritualized ceremony. New research suggests that women and children were intentionally singled out in one of the largest known prehistoric mass killings in Europe. Excavations at the Gomolava burial site in […]
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Brain Blood Flow May Predict Alzheimer’s Risk Before Memory Loss – Science News
New noninvasive tools reveal that subtle shifts in brain blood flow and oxygen use may mirror key markers of Alzheimer’s risk. Small shifts in how blood circulates through the brain and how brain cells use oxygen could signal a higher risk of Alzheimer’s disease, according to researchers at the Mark and Mary Stevens Neuroimaging and […]
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“Ghost Galaxy” Made of 99% Dark Matter Discovered 300 Million Light Years Away – Science News
Astronomers have detected a ghostly galaxy that is almost completely made of dark matter. The faint object was revealed by just four globular star clusters hiding in the Perseus cluster. While most galaxies blaze with billions of stars, a rare few are so faint they are barely detectable. These low-surface-brightness galaxies contain very few stars […]
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Spatial transcriptomics and single-cell analysis reveal GSTO2-mediated protective networks in oral squamous cell carcinoma tumor microenvironment – Research
Background:
Oral squamous cell carcinoma (OSCC) exhibits significant cellular heterogeneity and metabolic reprogramming that influence tumor progression and therapeutic responses. However, the molecular mechanisms underlying these processes remain poorly understood.
Methods:
We performed an integrated analysis of single-cell RNA sequencing and spatial transcriptomics analysis on OSCC samples to characterize cellular heterogeneity and identify key regulatory factors. Summary-data-based Mendelian randomization (SMR) analysis was conducted to establish causal links between gene expression and OSCC risk. Functional enrichment, protein-protein interaction (PPI) network analysis, molecular docking, and co-immunoprecipitation (Co-IP) were employed to elucidate molecular mechanisms.
Results:
Single-cell analysis of 50,667 cells identified nine distinct cell populations with epithelial cells showing the highest glutamine metabolism activity. SMR analysis revealed glutathione S-transferase omega 2 (GSTO2) as a genetically validated protective factor for OSCC risk. GSTO2-positive epithelial cells exhibited enhanced metabolic reprogramming, particularly in fatty acid degradation and amino acid catabolism pathways. Spatial transcriptomics demonstrated that GSTO2-positive cells were spatially organized and showed enhanced communication with immune cells. Protein-protein interaction analysis identified interferon-stimulated genes (MX1, OAS1, UBE2L6) and immunoproteasome subunits (PSMB8, PSMB9) as core regulatory hubs. Molecular docking confirmed direct binding interactions between GSTO2 and these hub proteins, with MX1-GSTO2 showing the strongest binding affinity (-10.7 kcal/mol). Co-immunoprecipitation experiments validated the physical interaction between GSTO2 and MX1.
Conclusions:
This study indicates that GSTO2 defines an epithelial subset characterized by enhanced metabolic activity and immune interactions, highlighting its potential as a biomarker and therapeutic target in OSCC.
Keywords:
GSTO2; Metabolic reprogramming; Oral squamous cell carcinoma; Single-cell RNA sequencing; Spatial transcriptomics.
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New Study Finally Uncovers the Molecular Trigger Behind Rare COVID Vaccine Blood Clots – Science News
Scientists have identified the precise molecular trigger behind a rare blood-clotting disorder linked to certain adenovirus-based COVID-19 vaccines and, in rare cases, natural adenovirus infection. Researchers led by Flinders University, working with international collaborators, have clarified how a rare blood clotting disorder can develop after certain COVID-19 adenovirus-based vaccines or following a natural adenovirus infection. […]
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FDA-Approved Seizure Drug May Stop Alzheimer’s Before It Starts – Science News
Unlike treatments that focus on removing plaques that have already formed, levetiracetam works differently. It blocks the production of toxic amyloid beta peptides in the first place. For decades, researchers have recognized that Alzheimer’s disease is marked by the buildup of toxic protein fragments in the brain. What has remained unclear is exactly how and […]
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Obesity and breast density enhance immune exclusion in the primary tumor microenvironment and promote breast cancer metastasis – Research
Recent epidemiological studies suggest that breast density and obesity together increase breast cancer risk. Although these risk factors have been explored individually, little is known about how they combine to alter the tumor immune microenvironment (TIME) and promote disease progression. To address this gap, we developed a murine model of both risk factors. Spatial analysis of the TIME revealed macrophages and T-cells predominantly localized in the stroma of both risk factor groups, indicating an immune exclusion phenotype. Mice with dual risk factors had significantly increased lung metastasis. To establish the human relevance of this model, we interrogated the TIME in biopsies from 158 patients with invasive ductal carcinoma and 10 years of follow-up data. We found that patients with both risk factors had the highest incidence of metastasis (45%). Furthermore, spatial immune profiling revealed exacerbated stromal localization of macrophages and T-cells in the dual risk factor group that progressed to metastasis. Overall, we uncovered an immune exclusion phenotype in metastatic breast cancer patients with obesity and breast density, and we present a relevant murine model that parallels human disease. The murine model will enable future investigation into therapies that intercept the mechanisms by which dual risk factors modulate the TIME.
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After Earth’s Greatest Extinction, These Sea Monsters Conquered the Oceans – Science News
Lost fossils reveal that some of the first ocean predators went global astonishingly fast after Earth’s worst extinction. Roughly 250 million years ago, a part of northwestern Australia that is now an arid desert sat beside a shallow bay connected to a vast prehistoric ocean. Fossils collected from this area more than 60 years ago […]
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