A new drug that works by making tumors more susceptible to chemotherapy and the immune system has increased survival in those with advanced pancreatic cancer in a trial.
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Frontiers: Background:
Chlorogenic acid (CGA) and taurine are well-known antioxidant compounds reported to reduce skin cellular senescence. However, the biological mechanisms underlying their skin-protective effects remain unclear.
Methods:
In this study, we conducted transcriptome-wide RNA sequencing to profile gene expression changes in human epidermal keratinocytes, melanocytes, and fibroblasts following treatment with CGA, taurine, or their combination. To identify aging-related genes, we integrated evidence from aging databases, perceived-age GWAS, enrichment in aging-related gene ontology and pathways, and drug-gene interaction annotations. Validation of representative genes was performed using quantitative real-time PCR.
Catheter Ablation and Oral Anticoagulation in Atrial Fibrillation
In patients with atrial fibrillation and recent stroke, adding catheter ablation to oral anticoagulation did not significantly reduce recurrent stroke, systemic embolism, death, or hospitalization for heart failure compared to standard therapy.
This randomized clinical trial found no significant difference between the standard-therapy group and the ablation group in the primary composite end point, which included recurrent ischemic stroke, systemic embolism, all-cause death, and hospitalization for heart failure.
The incidence rate of recurrent ischemic stroke in the standard-therapy group was 3.1 per 100 person-years, which was lower than previously reported values.22-24 Conversely, the incidence of recurrent ischemic stroke in the ablation group was 2.5 per 100 person-years, which is consistent with a recent report.25 Although the difference in the incidence rate of recurrent ischemic stroke between the 2 groups was not statistically significant, it remains possible that catheter ablation has a beneficial effect on reducing recurrent ischemic stroke. The lower-than-expected rate of recurrent ischemic stroke in the standard-therapy group likely reflected the appropriate continuation of direct oral anticoagulants in all patients, the exclusion of patients with severe stroke, recent advances in atrial fibrillation treatment, and the comanagement of atrial fibrillation care by neurologists and cardiologists.
All-cause death occurred in 5 patients (1.0 per 100 person-years) in the standard-therapy group and 12 patients (2.8 per 100 person-years) in the ablation group. The mortality rate in both groups was lower than expected, which is likely explained by the exclusion of patients with severe stroke, active cancer, or markedly impaired cardiac function. In most patients who died, more than 1.5 years had elapsed between the catheter ablation procedure and death, suggesting that most deaths were unlikely to be directly related to the catheter ablation procedure itself. In this study, patients in the ablation group more frequently had a history of heart disease, and the incidence rates for major bleeding and cardiovascular death were higher than those for patients in the standard-therapy group, which may be associated with the increased mortality observed in this group.26 However, the underlying reasons for this observation remain unclear.
Lift Off
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What If You Could Build the Death Star?
That’s no moon. It’s a space station. The enormous, planet-killing kind, designed for only one thing — to bring order to the galaxy. It’s Star Wars’ Imperial superweapon, the Death Star. What would it take to build one just like this? Where would we assemble the biggest weapon of mass destruction?
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How to Build a Death Star According to a NASA Engineer
NASA’s Brian Muirhead explains how to build a Death Star and tells us what it would really be like to fly past a flurry of asteroids.
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How to build a death star according to a NASA engineer.
Does the Universe SPIN once every 500 billion years?!
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Does the Universe spin? Think about it, planets spin, the Sun spins, galaxies spin, even black holes spin — so what about the entire Universe? And if it was spinning could this help solve one of the biggest problems in astrophysics today — the \.
Waves of gene control reveal how a key gene times limb development
In a new study published in Genes & Development, research led by Dr. Lila Allou at the MRC Laboratory of Medical Sciences (LMS) in London and Professor Stefan Mundlos at the Max Planck Institute for Molecular Genetics and Charité in Berlin demonstrates how different regulatory genetic elements coordinate the temporal activity of a key developmental gene. Their findings likely explain subtle differences seen in patients with congenital limb malformations, for which the underlying disease mechanisms often remain unknown.
Although every cell contains the same genes, not all genes are active at any given time. Gene regulation is a fundamental process that ensures only the necessary genes are expressed in each cell type. This is why, for example, neurons differ in structure and function from muscle cells. Precise fine-tuning of gene regulation is especially critical during development. Timed waves of transcriptional activity ensure that an embryo develops into a healthy organism with properly positioned and formed limbs, organs, and tissues. This process is driven by specialized genes and controlled by regulatory elements in the genome.
Address correspondence to: Dogukan Mizrak, 2,800 Plymouth Road, NCRC-26, Room 263S, Ann Arbor, Michigan, 48,109, USA
Email: dmizrak@med.umich.edu. Or to: Bo Yang, 1,500 E Medical Center Dr., 5,144 Frankel Cardiovascular Center, Ann Arbor, Michigan, 48,109, USA. Email: boya@med.umich.edu.
