A team at Harvard has identified molecules that restore protective caps on the tips of our chromosomes that regulate cells ageing.
The factors mediating fatal SARS-CoV-2 infections are poorly understood. Here, we show that cigarette smoke causes a dose-dependent upregulation of Angiotensin Converting Enzyme 2 (ACE2), the SARS-CoV-2 receptor, in rodent and human lungs. Using single-cell sequencing data, we demonstrate that ACE2 is expressed in a subset of secretory cells in the respiratory tract. Chronic smoke exposure triggers the expansion of this cell population and a concomitant increase in ACE2 expression. In contrast, quitting smoking decreases the abundance of these secretory cells and reduces ACE2 levels. Finally, we demonstrate that ACE2 expression is responsive to inflammatory signaling and can be upregulated by viral infections or interferon treatment. Taken together, these results may partially explain why smokers are particularly susceptible to severe SARS-CoV-2 infections. Furthermore, our work identifies ACE2 as an interferon-stimulated gene in lung cells, suggesting that SARS-CoV-2 infections could create positive-feedback loops that increase ACE2 levels and facilitate viral dissemination.
China’s legislators will discuss a new national security law specifically crafted for Hong Kong. The issue has long been controversial in the city, despite the Basic Law requiring its enactment.
A group of scientists announced a rare find Wednesday – the fossilized remains of a giant bug that crawled around Utah during the time of the dinosaurs.
Called “Morrisonnepa jurassica,” the insect roamed the region 151 million years ago and was discovered in the same geological formation as Allosaurus and Stegosaurus.
It appears to be related to modern giant water bugs, or Belostomatidae, which prey on fish, amphibians, snakes and invertebrates. The bugs are also known for their excruciating bite.
Gravitational-wave researchers at the University of Birmingham have developed a new model that promises to yield fresh insights into the structure and composition of neutron stars.
The model shows that vibrations, or oscillations, inside the stars can be directly measured from the gravitational-wave signal alone. This is because neutron stars will become deformed under the influence of tidal forces, causing them to oscillate at characteristic frequencies, and these encode unique information about the star in the gravitational-wave signal.
This makes asteroseismology — the study of stellar oscillations — with gravitational waves from colliding neutron stars a promising new tool to probe the elusive nature of extremely dense nuclear matter.
Continue reading “New Gravitational-Wave Model Helps Reveal the True Nature of Neutron Stars” »
The average cost of stem cell treatment is $8,750.
I get asked many questions about stem cell therapies, but one of the most common over the years has been about the stem cell treatment cost. For instance, a reporter might ask, “How much does a stem cell treatment for MS cost?” and a patient might ask me, “How much is a fair cost for a stem cell therapy for arthritis?” Or, patients will voluntarily tell me what they paid or mention it in the comments. We hear various numbers thrown around about costs so I decided to do a poll on this. I even did an early update on the results of this poll, voicing my skepticism that the costs paid were worth it.
But the poll has gotten well over 500 responses now so I thought I would revisit it and what it might mean.
Continue reading “Update on stem cell treatment cost for 2018 from ongoing poll” »
Interesting articles on theranostic iron nanowires. I’m interested in watching all aspects of development of nanobots, because I think it may lead to new forms of treatments for superlongevity and superintelligence.
Phys.org: Iron nanorobots go undercover to do surveillance on living cells in real time:
https://phys.org/…/2020–05-iron-nanorobots-undercover-surve…
Continue reading “Magnetic core–shell nanowires as MRI contrast agents for cell tracking” »
Upon seeing the blood-stained gloves, O.J. Simpson may have had electrical activity in his brain that showed recognition, and guilt.
In 2015 Francesco Greco, head of the Laboratory of Applied Materials for Printed and Soft electronics (LAMPSe) at the Institute of Solid State Physics at Graz University of Technology, developed so-called “tattoo electrodes” together with Italian scientists.
These are conductive polymers that are printed using an inkjet printer on standard tattoo paper and then stuck to the skin like transfers to measure heart or muscle activity.
This type of electrode, optimized in 2018, opened up completely new paths in electrophysiological examinations, such as electrocardiography (ECG) or electromyography (EMG). Thanks to a thickness of 700 to 800 nanometres — that is about 100 times thinner than a human hair — the tattoos adapt to uneven skin and are hardly noticeable on the body.
Continue reading “Modified tattoo electrodes can be used to measure brain activity” »
