Artificial intelligence is infiltrating every industry, allowing vehicles to navigate without drivers, assisting doctors with medical diagnoses, and giving financial institutions more nuanced ways to predict risk. But for all the authentic use cases, there’s a lot of hype too.
If used to make non-heritable genetic changes, CRISPR gene-editing technology holds tremendous promise for treating or curing a wide range of devastating disorders, including sickle cell disease, vision loss, and muscular dystrophy. Early efforts to deliver CRISPR-based therapies to affected tissues in a patient’s body typically have involved packing the gene-editing tools into viral vectors, which may cause unwanted immune reactions and other adverse effects.
Now, NIH-supported researchers have developed an alternative CRISPR delivery system: nanocapsules. Not only do these tiny, synthetic capsules appear to pose a lower risk of side effects, they can be precisely customized to deliver their gene-editing payloads to many different types of cells or tissues in the body, which can be extremely tough to do with a virus. Another advantage of these gene-editing nanocapsules is that they can be freeze-dried into a powder that’s easier than viral systems to transport, store, and administer at different doses.
In findings published in Nature Nanotechnology [1], researchers, led by Shaoqin Gong and Krishanu Saha, University of Wisconsin-Madison, developed the nanocapsules with specific design criteria in mind. They would need to be extremely small, about the size of a small virus, for easy entry into cells. Their surface would need to be adaptable for targeting different cell types. They also had to be highly stable in the bloodstream and yet easily degraded to release their contents once inside a cell.
блядь! An explosion at Russia’s State Research Centre of Virology and Biotechnology (Vector) resulted in a fire, glass blown out throughout the building, and one worker suffering third degree burns on Monday, according to the Bulletin of Atomic Scientists. Vector is one of the only two places in the world where live smallpox virus samples are officially stored, as well as retains stocks of other deadly pathogens including the Ebola virus and anthrax spores.
According to the state-run TASS news agency, Koltsovo city head administrator Nikolai Krasnikov said that the blast occurred during scheduled repair work, blowing out glass in the building and starting a 30 square meter fire. Various reports have indicated the incident started with a gas explosion. However, Krasnikov emphasized that no biohazardous materials were stored where the explosion and blaze occurred, and that there is no threat to the general population. The Vector building in question did not suffer structural damage, Krasnikov added, while the worker is in “intensive” condition.
Prof. S. Jay Olshansky is a Professor of the School of Public Health at the University of Illinois at Chicago, Research Associate at the Center on Aging at the University of Chicago and at the London School of Hygiene and Tropical Medicine, and Chief Scientist at Lapetus Solutions, Inc. He has received multiple scientific awards, including the Irving S. Wright Award from the American Federation for Aging Research.
Prof. Olshansky is the co-author of multiple papers related to epidemiology and population, and the areas of his current research include estimates of the upper limits to human longevity, opportunities and challenges related to population aging, how morbidity changes over time, and forecasts of the size and age demographics of the population with and without medicines that address the underlying mechanisms of aging.
We had the opportunity to interview Prof. Olshansky at International Perspectives in Geroscience, a conference hosted at Weizmann Institute of Science (Israel) on September 4–5.
Sub-nanometre resolution in 3D position measurements of light-emitting molecules has been achieved by physicists in Germany. Jörg Enderlein and colleagues at the University of Göttingen achieved the result by replacing metal films used in previous super-resolution techniques with single layers of graphene. Their innovation could allow researchers in a wide variety of fields to measure molecular positions to unprecedented degrees of accuracy.
Recently, the technique of single-molecule localization super-resolution microscopy (SMLM) has become an incredibly useful tool for researchers in fields ranging from fundamental physics to medical research. By analysing images of single light-emitting molecules, researchers can pinpoint the positions of their centres to within single atomic widths. However, SMLM faces one significant shortcoming: it can only locate molecules in 2D, giving no information about their positions along the out-of-plane axis.
This problem can be partially overcome through the technique of metal-induced energy transfer (MIET), which introduces a thin metal film to the setup. The idea is that the apparatus picks up changes in the molecule’s fluorescence that are caused by the molecule coupling to collective excitations of surface plasmons in the film. Since this light emission varies with distance from the film, researchers can use MIET to calculate the molecule’s distance relative to the film surface, allowing them to locate it along the third axis. Yet with current versions of the technique, the accuracy of this out-of-plane measurement is 3–5 times worse than that of lateral localization, in the plane of the film.
When it comes to finding new treatments for cancer scientitists have been focusing on an anti-cancer agent known as Small interfering ribonucleic acid (siRNA). But getting this agent to cancer cells has been a challenge.
Scientists have developed a platform using nanoparticles to send a cancer-fighting agent to cells.
On its surface, the plan was simple: gene-hack mosquitoes so their offspring immediately die, mix them with disease-spreading bugs in the wild, and watch the population drop off. Unfortunately, that didn’t quite pan out.
The genetically-altered mosquitoes did mix with the wild population, and for a brief period the number of mosquitoes in Jacobino, Brazil did plummet, according to research published in Nature Scientific Reports last week. But 18 months later the population bounced right back up, New Atlas reports — and even worse, the new genetic hybrids may be even more resilient to future attempts to quell their numbers.
Transplanted brain stem cells survive without anti-rejection drugs in mice. By exploiting a feature of the immune system, researchers open the door for stem cell transplants to repair the brain.
In experiments in mice, Johns Hopkins Medicine researchers say they have developed a way to successfully transplant certain protective brain cells without the need for lifelong anti-rejection drugs.
A report on the research, published today (September 16, 2019) in the journal Brain, details the new approach, which selectively circumvents the immune response against foreign cells, allowing transplanted cells to survive, thrive and protect brain tissue long after stopping immune-suppressing drugs.
Age is not the definitive factor it’s made out to be when it comes to our health. We can use our age as a baseline for tracking our health and longevity, but it isn’t stagnant. For example, certain types of testing can help us compare our biological age to our calendar age in order to tinker with our wellness routine and achieve the milestones we’re after. With the right steps, we can slow down and even sometimes reverse the aging process.
When it comes to our biological age, or the measure of how well our body is actually functioning for whatever life stage we are in, there are many things that impact it. Diet, lifestyle patterns like exercise and sleep, and stress are all involved in forming our biological age, along with many other factors like blood sugar, inflammation, and genetics. This week on The Doctor’s Farmacy, I’m joined by Dr. David Sinclair to explore the topic of longevity and anti-aging and how he reduced his own internal age by more than 20 years. Dr. Sinclair is a professor in the Department of Genetics and co-director of the Paul F. Glenn Center for the Biology of Aging at Harvard Medical School, where he and his colleagues study longevity, aging, and how to slow its effects.
This episode of The Doctor’s Farmacy is brought to you by ButcherBox. Now through September 29, 2019, new subscribers to ButcherBox will receive ground beef for life. When you sign up today, ButcherBox will send you 2lbs of 100% pasture-raised grass-fed, grass finished beef free in every box for the life of your subscription. Plus listeners will get an additional $20 off their first box. All you have to do is head over to ButcherBox.com/farmacy
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Dr. Hyman is an 11-time New York Times bestselling author, family physician and international leader in the field of Functional Medicine. His podcast, The Doctor’s Farmacy, is a place for deep conversations about the critical issues of our time in the space of health, wellness, food and politics. New episodes are released every Wednesday here on YouTube, and wherever you listen to podcasts.
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Website http://www.drhyman.com/
