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UK Scientists Plan to Construct Synthetic Human Genetic Material From Scratch

30 juin 2025 à 02:34
"Researchers are embarking on an ambitious project to construct human genetic material from scratch," reports the Guardian, "to learn more about how DNA works and pave the way for the next generation of medical therapies." Scientists on the Synthetic Human Genome (SynHG) project will spend the next five years developing the tools and knowhow to build long sections of human genetic code in the lab. These will be inserted into living cells to understand how the code operates. Armed with the insights, scientists hope to devise radical new therapies for the treatment of diseases. Among the possibilities are living cells that are resistant to immune attack or particular viruses, which could be transplanted into patients with autoimmune diseases or with liver damage from chronic viral infections. "The information gained from synthesising human genomes may be directly useful in generating treatments for almost any disease," said Prof Jason Chin, who is leading the project at the MRC's Laboratory of Molecular Biology (LMB) in Cambridge... For the SynHG project, researchers will start by making sections of a human chromosome and testing them in human skin cells. The project involves teams from the universities of Cambridge, Kent, Manchester, Oxford and Imperial College London... Embedded in the project is a parallel research effort into the social and ethical issues that arise from making genomes in the laboratory, led by Prof Joy Zhang at the University of Kent. "We're a little way off having anything tangible that can be used as a therapy, but this is the time to start the discussion on what we want to see and what we don't want to see," said Dr Julian Sale, a group leader at the LMB.

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People with Severe Type 1 Diabetes are Cured in Small Trial of New Drug

22 juin 2025 à 04:34
"A single infusion of a stem cell-based treatment may have cured 10 out of 12 people with the most severe form of Type 1 diabetes," reports the New York Times. "One year later, these 10 patients no longer need insulin. The other two patients need much lower doses." The experimental treatment, called zimislecel and made by Vertex Pharmaceuticals of Boston, involves stem cells that scientists prodded to turn into pancreatic islet cells, which regulate blood glucose levels. The new islet cells were infused and reached the pancreas, where they took up residence. The study was presented Friday evening at the annual meeting of the American Diabetes Association and published online by The New England Journal of Medicine... Patients in the study began to need less insulin within a few months of being infused with new islet cells, and most stopped needing the hormone altogether at about six months [said Dr. Trevor Reichman, director of the pancreas and islet transplant program at University Health Network, a hospital in Toronto, and first author of the study]. He added that patients' episodes of hypoglycemia went away within the first 90 days of treatment. If the study continues to show positive results, the company expects to submit an application to the FDA next year. "For the short term, this looks promising" for severely affected patients like those in the study," said Dr. Irl B. Hirsch, a diabetes expert at the University of Washington who was not involved in the study. But patients in the trial had to stay on drugs to prevent the immune system from destroying the new cells. Suppressing the immune system, he said, increases the risk of infections and, over the long term, can increase the risk of cancer... Patients may have to take the immunosuppressant drugs for the rest of their lives, the Vertex spokesperson said.

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MIT Chemical Engineers Develop New Way To Separate Crude Oil

Par :BeauHD
20 juin 2025 à 00:30
Longtime Slashdot reader fahrbot-bot shares a report from the Cool Down: A team of chemical engineers at the Massachusetts Institute of Technology has invented a new process to separate crude oil components, potentially bringing forward a replacement that can cut its harmful carbon pollution by 90%. The original technique, which uses heat to separate crude oil into gasoline, diesel, and heating oil, accounts for roughly 1% of all global energy consumption and 6% of dirty energy pollution from the carbon dioxide it releases. "Instead of boiling mixtures to purify them, why not separate components based on shape and size?" said Zachary P. Smith, associate professor of chemical engineering at MIT and senior author of the study, as previously reported in Interesting Engineering. The team invented a polymer membrane that divides crude oil into its various uses like a sieve. The new process follows a similar strategy used by the water industry for desalination, which uses reverse osmosis membranes and has been around since the 1970s. [The membrane excelled in lab tests. It increased the toluene concentration by 20 times in a mixture with triisopropylbenzene. It also effectively separated real industrial oil samples containing naphtha, kerosene, and diesel.]

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23andMe's Founder Anne Wojcicki Wins Bid For DNA Testing Firm

Par :BeauHD
13 juin 2025 à 20:50
Anne Wojcicki, co-founder of 23andMe, has regained control of the bankrupt DNA-testing company after a nonprofit she controls outbid Regeneron Pharmaceuticals with a $305 million offer. The company filed for bankruptcy in March due to declining demand and fallout from a major 2023 data breach. "The agreement with non-profit TTAM Research Institute is the result of a final round of bidding that occurred earlier today between TTAM and Regeneron Pharmaceuticals," the company said in a statement.

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23andMe Says 15% of Customers Asked To Delete Their Genetic Data Since Bankruptcy

Par :BeauHD
11 juin 2025 à 22:40
Since filing for bankruptcy in March, 23andMe has received data deletion requests from 1.9 million users -- around 15% of its customer base. That number was revealed by 23andMe's interim chief executive Joseph Selsavage during a House Oversight Committee hearing, during which lawmakers scrutinized the company's sale following an earlier bankruptcy auction. "The bankruptcy sparked concerns that the data of millions of Americans who used 23andMe could end up in the hands of an unscrupulous buyer, prompting customers to ask the company to delete their data," adds TechCrunch. From the report: Pharmaceutical giant Regeneron won the court-approved auction in May, offering $256 million for 23andMe and its banks of customers' DNA and genetic data. Regeneron said it would use the 23andMe data to aid the discovery of new drugs, and committed to maintain 23andMe's privacy practices. Truly deleting your personal genetic information from the DNA testing company is easier said than done. But if you were a 23andMe customer and are interested, MIT Technology Review outlines that steps you can take.

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'We Finally May Be Able to Rid the World of Mosquitoes. But Should We?'

8 juin 2025 à 15:34
It's no longer a hypothetical question, writes the Washington Post. "In recent years, scientists have devised powerful genetic tools that may be able to eradicate mosquitoes and other pests once and for all." But along with the ability to fight malaria, dengue, West Nile virus and other serious diseases, "the development of this technology also raises a profound ethical question: When, if ever, is it okay to intentionally drive a species out of existence...?" When so many wildlife conservationists are trying to save plants and animals from disappearing, the mosquito is one of the few creatures that people argue is actually worthy of extinction. Forget about tigers or bears; it's the tiny mosquito that is the deadliest animal on Earth. The human misery caused by malaria is undeniable. Nearly 600,000 people died of the disease in 2023, according to the World Health Organization, with the majority of cases in Africa... But recently, the Hastings Center for Bioethics, a research institute in New York, and Arizona State University brought together a group of bioethicists to discuss the potential pitfalls of intentionally trying to drive a species to extinction. In a policy paper published in the journal Science last month, the group concluded that "deliberate full extinction might occasionally be acceptable, but only extremely rarely..." It's unclear how important malaria-carrying mosquitoes are to broader ecosystems. Little research has been done to figure out whether frogs or other animals that eat the insects would be able to find their meals elsewhere. Scientists are hotly debating whether a broader "insect apocalypse" is underway in many parts of the world, which may imperil other creatures that depend on them for food and pollination... Instead, the authors said, geneticists should be able to use gene editing, vaccines and other tools to target not the mosquito itself, but the single-celled Plasmodium parasite that is responsible for malaria. That invisible microorganism — which a mosquito transfers from its saliva to a person's blood when it bites — is the real culprit. A nonprofit research consortium called Target Malaria has genetically modified mosquitoes in their labs (which get core funding from the Gates Foundation and from Open Philanthropy, backed by Facebook co-founder Dustin Moskovitz and his wife). ), and hopes to deploy them in the wild within five years...

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23andMe Founder Aims To Restart Auction With Major Corporate Backing

Par :BeauHD
4 juin 2025 à 10:00
Anne Wojcicki has asked a U.S. judge to reopen the auction for 23andMe, claiming she has backing from a $400+ billion Fortune 500 company. Reuters reports: South San Francisco, California-based 23andMe filed for bankruptcy in March, seeking to sell its business at auction after a decline in consumer demand and a 2023 data breach that exposed sensitive genetic and personal information of millions of customers. Last month, Regeneron Pharmaceuticals agreed to buy the firm for $256 million, topping a $146 million bid from Wojcicki and TTAM Research Institute, which was founded by Wojcicki and describes itself as a California non-profit public benefit corporation. In a filing dated May 31, Wojcicki claimed that 23andMe's debtors had attempted to tilt the sales process away from TTAM and in favor of Regeneron. TTAM and Wojcicki said in the filing that 23andMe's financial and legal advisers unfairly capped their maximum bid at $250 million due to misplaced concerns about TTAM's "financial wherewithal." The plaintiffs said the auction was prematurely concluded before they had the opportunity to submit a bid that would have exceeded $280 million. The company's debtors said the auction results came after an extensive and careful consideration by a four-member special committee of independent directors, according to the filing. According to another filing, 23andMe is seeking court approval to let Wojcicki and Regeneron submit final proposals by June 12. 23andMe is also seeking a $10 million breakup fee for Regeneron if Wojcicki's bid is ultimately accepted.

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World-First Biocomputing Platform Hits the Market

Par :BeauHD
4 juin 2025 à 03:30
An anonymous reader quotes a report from IEEE Spectrum: In a development straight out of science fiction, Australian startup Cortical Labs has released what it calls the world's first code-deployable biological computer. The CL1, which debuted in March, fuses human brain cells on a silicon chip to process information via sub-millisecond electrical feedback loops. Designed as a tool for neuroscience and biotech research, the CL1 offers a new way to study how brain cells process and react to stimuli. Unlike conventional silicon-based systems, the hybrid platform uses live human neurons capable of adapting, learning, and responding to external inputs in real time. "On one view, [the CL1] could be regarded as the first commercially available biomimetic computer, the ultimate in neuromorphic computing that uses real neurons," says theoretical neuroscientist Karl Friston of University College London. "However, the real gift of this technology is not to computer science. Rather, it's an enabling technology that allows scientists to perform experiments on a little synthetic brain." The first 115 units will begin shipping this summer at $35,000 each, or $20,000 when purchased in 30-unit server racks. Cortical Labs also offers a cloud-based "wetware-as-a-service" at $300 weekly per unit, unlocking remote access to its in-house cell cultures. Each CL1 contains 800,000 lab-grown human neurons, reprogrammed from the skin or blood samples of real adult donors. The cells remain viable for up to six months, fed by a life-support system that supplies nutrients, controls temperature, filters waste, and maintains fluid balance. Meanwhile, the neurons are firing and interpreting signals, adapting from each interaction. The CL1's compact energy and hardware footprint could make it attractive for extended experiments. A rack of CL1 units consumes 850-1,000 watts, notably lower than the tens of kilowatts required by a data center setup running AI workloads. "Brain cells generate small electrical pulses to communicate to a broader network," says Cortical Labs Chief Scientific Officer Brett Kagan. "We can do something similar by inputting small electrical pulses representing bits of information, and then reading their responses. The CL1 does this in real time using simple code abstracted through multiple interacting layers of firmware and hardware. Sub-millisecond loops read information, act on it, and write new information into the cell culture." The company sees CL1 as foundational for testing neuropsychiatric treatments, leveraging living cells to explore genetic and functional differences. "It allows people to study the effects of stimulation, drugs and synthetic lesions on how neuronal circuits learn and respond in a closed-loop setup, when the neuronal network is in reciprocal exchange with some simulated world," says theoretical neuroscientist Karl Friston of University College London. "In short, experimentalists now have at hand a little 'brain in a vat,' something philosophers have been dreaming about for decades."

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Uploading the Human Mind Could One Day Become a Reality, Predicts Neuroscientist

1 juin 2025 à 19:29
A 15-year-old asked the question — receiving an answer from an associate professor of psychology at Georgia Institute of Technology. They write (on The Conversation) that "As a brain scientist who studies perception, I fully expect mind uploading to one day be a reality. "But as of today, we're nowhere close..." Replicating all that complexity will be extraordinarily difficult. One requirement: The uploaded brain needs the same inputs it always had. In other words, the external world must be available to it. Even cloistered inside a computer, you would still need a simulation of your senses, a reproduction of the ability to see, hear, smell, touch, feel — as well as move, blink, detect your heart rate, set your circadian rhythm and do thousands of other things... For now, researchers don't have the computing power, much less the scientific knowledge, to perform such simulations. The first task for a successful mind upload: Scanning, then mapping the complete 3D structure of the human brain. This requires the equivalent of an extraordinarily sophisticated MRI machine that could detail the brain in an advanced way. At the moment, scientists are only at the very early stages of brain mapping — which includes the entire brain of a fly and tiny portions of a mouse brain. In a few decades, a complete map of the human brain may be possible. Yet even capturing the identities of all 86 billion neurons, all smaller than a pinhead, plus their trillions of connections, still isn't enough. Uploading this information by itself into a computer won't accomplish much. That's because each neuron constantly adjusts its functioning, and that has to be modeled, too. It's hard to know how many levels down researchers must go to make the simulated brain work. Is it enough to stop at the molecular level? Right now, no one knows. Knowing how the brain computes things might provide a shortcut. That would let researchers simulate only the essential parts of the brain, and not all biological idiosyncrasies. Here's another way: Replace the 86 billion real neurons with artificial ones, one at a time. That approach would make mind uploading much easier. Right now, though, scientists can't replace even a single real neuron with an artificial one. But keep in mind the pace of technology is accelerating exponentially. It's reasonable to expect spectacular improvements in computing power and artificial intelligence in the coming decades. One other thing is certain: Mind uploading will certainly have no problem finding funding. Many billionaires appear glad to part with lots of their money for a shot at living forever. Although the challenges are enormous and the path forward uncertain, I believe that one day, mind uploading will be a reality. "The most optimistic forecasts pinpoint the year 2045, only 20 years from now. Others say the end of this century. "But in my mind, both of these predictions are probably too optimistic. I would be shocked if mind uploading works in the next 100 years. "But it might happen in 200..."

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Court Unanimously Denies Theranos Founder Elizabeth Holmes' Request For Rehearing

Par :BeauHD
10 mai 2025 à 01:25
Elizabeth Holmes has lost her bid to have the appeal of her 2022 fraud conviction reheard by the 9th Circuit Court of Appeals, leaving the U.S. Supreme Court as her final option. She and former Theranos executive Sunny Balwani remain liable for $452 million in restitution, while Holmes continues serving her 11-year sentence. CNBC reports: The 9th Circuit U.S. Court of Appeals denied Holmes' request for a rehearing before the original three-judge panel that upheld her conviction. At the same time, the court said no judge on the circuit court had asked for a vote on whether to have the full court rehear the appeal. Holmes, 41, was sentenced in January 2023 to 11 years and 3 months in prison after being found guilty of four counts of wire fraud in January 2022. She was found guilty of deceiving investors about the capabilities of Theranos, the blood-testing company she founded in 2003. The company crumbled after a Wall Street Journal story outlined the firm's struggles and shut down in 2018.

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