The cell bank could one day be used to help preserve endangered species. https://cnn.it/3mzuSt4
Category: biotech/medical – Page 1,702
Can Greenland Sharks Improve Human Longevity?
Are there vertebrates occupying the planet today whose lifespans extend back to before the founding of the United States? Based on recent research, it seems very likely — and they exist in the form of sharks whose fermented meat are used in a very distinctive Icelandic dish. Scientists have found evidence that Greenland sharks live for hundreds of years — and that there are some whose lifespans extend to 400 or even 500 years.
For some scientists, the lengthy lifespans of certain creatures can also have an impact on research into making humans live longer. That’s true for the immortal jellyfish, and it also applies to the Greenland shark. A recent article by Jonathan Moens at Atlas Obscura explores what scientists have learned from their studies of the long-lived sharks — and what it might mean for humanity.
Greenland sharks’ longevity could be chalked up to genetic or lifestyle factors, or some combination of the two. The University of Manchester’s Holly Shiels suggested that, as Moens writes, “Greenland sharks may have a uniquely sophisticated system to repair damaged DNA.” Other scientists point to the sharks’ habitat — cold Arctic waters — and their ability to live for a long period of time on a relatively small amount of food as signs of a very efficient metabolism.
Hospital on a chip
Circa 2009
The researchers expect to have a working prototype of the product in four years. “We are just at the beginning of this project,” Wang said. “During the first two years, our primary focus will be on the sensor systems. Integrating enzyme logic onto electrodes that can read biomarker inputs from the body will be one of our first major challenges.”
“Achieving the goal of the program is estimated to take nearly a decade,” Chrisey said.
Developing an effective interface between complex physiological processes and wearable devices could have a broader impact, Wang said. If the researchers are successful, they could pave the way for “autonomous, individual, on-demand medical care, which is the goal of the new field of personalized medicine,” he added.
Turkey to Add More Advanced Drone to Fleet That Has Swung Wars
‘’Baykar says the Akinci, Turkish for “raider,” can attack targets in the air and on the ground, and operate alongside fighter jets, flying higher and staying in the air longer than Turkey’s existing pilotless planes. The drones will carry a range of missiles developed by Turkey’s Roketsan.’’
Hospitals in U.S. South Run Low on Oxygen Amid Covid, Storm.
Calling Through the DNA Wire: A Newly Discovered Genetic “Switch”
Proteins can communicate through DNA, conducting a long-distance dialogue that serves as a kind of genetic “switch,” according to Weizmann Institute of Science researchers. They found that the binding of proteins to one site of a DNA molecule can physically affect another binding site at a distant location, and that this “peer effect” activates certain genes. This effect had previously been observed in artificial systems, but the Weizmann study is the first to show it takes place in the DNA of living organisms.
A team headed by Dr. Hagen Hofmann of the Chemical and Structural Biology Department made this discovery while studying a peculiar phenomenon in the soil bacteria Bacillus subtilis. A small minority of these bacteria demonstrate a unique skill: an ability to enrich their genomes by taking up bacterial gene segments scattered in the soil around them. This ability depends on a protein called ComK, a transcription factor, which binds to the DNA to activate the genes that make the scavenging possible. However, it was unknown how exactly this activation works.