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Another difference between normal and abnormal cells — cancer cells can continue to grow despite damage to cell structures and changes in the number of chromosomes.

Scientists have uncovered how tumours are able to grow despite significant damage to the structure and number of their chromosomes — the storage units of DNA — according to two new studies published in Cancer Cell and Cancer Discovery today.

“We hope that understanding these mechanisms will allow us to limit drug resistance and improve the efficacy of cancer therapies.” - Professor Charles Swanton

Healthy cells are programmed to self-destruct if there are mistakes in their genes that can’t be fixed, but cancer cells can carry on growing with these abnormalities. Over time, further genetic changes allow them to keep growing, spread, and become resistant to treatment.

Continue reading “Researchers reveal how cancer cells cope with genetic chaos” | >

Scientists identify the physical connection through which the prefrontal cortex inhibits instinctive behavior

From fighting the urge to hit someone to resisting the temptation to run off stage instead of giving that public speech, we are often confronted with situations where we have to curb our instincts. Scientists at the European Molecular Biology Laboratory (EMBL) have traced exactly which neuronal projections prevent social animals like us from acting out such impulses. The study, published in Nature Neuroscience, could have implications for schizophrenia and mood disorders like depression.

See Also: The power of expectation can restrain hyper-emotional memories in the brain

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Researchers have identified a drug that can regenerate teeth from the inside out, possibly reducing the need for artificial fillings.

The drug was previously used in Alzheimer’s clinical trials, and it now appears to improve the tooth’s natural ability to heal itself. It works by activating stem cells inside the tooth’s pulp centre, prompting the damaged area to regenerate the hard dentin material that makes up the majority of a tooth.

“The simplicity of our approach makes it ideal as a clinical dental product for the natural treatment of large cavities, by providing both pulp protection and restoring dentine,” said lead author Paul Sharpe from King’s College London.

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In late 2015, iPhone and PlayStation 3 hacker George Hotz teased a project that sounded like a dream: his new company would produce a $1,000 consumer product that could grant your car semi-autonomous capabilities. Eleven months and one terse letter from the National Highway Traffic Safety Administration later, Hotz killed the project.

About a month after that, Hotz resurrected it as a two open-source efforts, splitting the hardware and software of the self-driving tech he had created with the rest of his company, Comma.ai. Hotz always talked like he wanted to start a DIY car revolution to take on the car industry (and Elon Musk especially). Open sourcing the plans only increased the chances of it happening.

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More data for caloric restriction and health benefits.

The long-term response to calorie restriction has long been of interest to the aging research community, and particularly in the past few decades as the tools of biotechnology allowed for a more detailed analysis of the metabolic changes that accompany a reduced calorie intake. A restricted diet extends healthy life spans in near all species tested to date, though to a much greater extent in short-lived species than in long-lived species such as our own. Considerable effort is presently devoted to the development of drugs that can replicate some fraction of calorie restriction — more effort than is merited in my opinion, given that the optimal result for extension of human life span achieved via calorie restriction mimetics will be both hard to achieve safely and very limited in comparison to the gains possible through rejuvenation therapies after the SENS model. Repairing damage within the existing system should be expected to outdo attempts to change the system in order to slow the accumulation of damage, in both efficiency and size of result.

Not everyone is interested in the long term, however. The short term health benefits of calorie restriction appear quickly and are surprisingly similar in mice and humans, given that calorie restriction in mice results in significantly extended life and calorie restriction in humans does not. The beneficial adjustments to metabolism and organ function are for the most part larger and more reliable than similar gains presently achievable through forms of medicine. That is more a case of medical science having a long way to go yet than calorie restriction being wondrous, however. Still, the short term benefits are coming to the attention to wider audience within the research and medical community.

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Grassroots funding of fundamental science and private enterprize will lead the way in rejuvenation biotechnology not the traditional funding sources from Government which are shrinking every year.

It is important to understand that innovation and progress is unlikely to come from the Government and the traditional grant system which is shrinking every year. Rejuvenation biotechnology will likely be funded with a mix of fundraising for fundamental breakthrough technologies followed by private enterprize taking discoveries to market. This is why supporting science is critcial as relying on the Government to innovate and drive progress is unlikely to yield results anytime soon.

“Today, researchers compete for government grants at increasingly shorter intervals and with diminishing chances of success: Less than 1 in 5 grant applications succeeds. This inhibits risk taking.

By contrast, private investment in medicine has kept pace with the aging population and is the principal engine for advancement. More than 80% of new drug approvals originate from work solely performed in private companies. Note that such drug approvals come on average 16 years after the beginning of clinical trials, which typically cost $2.5 billion from start to finish. Even if grant-subsidized academics wanted to create a new drug, economic reality prevents it.”

Continue reading “Don’t Thank Big Government for Medical Breakthroughs” | >

CRISPR can help us end many diseases and guide evolution and is probably one of the most powerful tools we have recently added to our toolkit.

Imagine you could edit a mouse’s genes to be resistant to Lyme Disease. The mouse would breed and evolution would take its course, leading to the extinction of the disease. That’s the vision for scientists developing CRISPR, technology that allows scientists to rewrite the code of life. William Brangham talks to Michael Specter who wrote about CRISPR for The New Yorker.

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