Physicist Wei Chen at Univ. of Texas at Arlington’s Center for Security Advances Via Applied Nanotechnology was testing a copper-cysteamine complex created in his laboratory when he discovered unexplained decreases in its luminescence, or light emitting power, over a time-lapse exposure to x-rays. Further testing work revealed that the “Cu-Cy” nanoparticles, when combined with x-ray exposure, significantly slowed tumor growth in studies.
A team of scientists, led by physicist Amir Yacoby of Harvard Univ., has developed a magnetic resonance imaging (MRI) system that can produce nanoscale images, and may one day allow researchers to peer into the atomic structure of individual molecules. Though not yet precise enough to capture atomic-scale images of a single molecule, the system already has been used to capture images of single electron spins.
These days, Hugh Herr, an assoc. prof. of media arts and sciences at Massachusetts Institute of Technology, gets about 100 emails daily from people across the world interested in his bionic limbs. Messages pour in from amputees seeking prostheses and from media outlets pursuing interviews. Then there are students looking to join Herr’s research group.
Scientists have solved a decades-old medical mystery, and in the process have found a potentially less toxic way to fight invasive fungal infections, which kill about 1.5 million people a year. The researchers say they now understand the mechanism of action of amphotericin, an antifungal drug that has been in use for more than 50 years even though it is nearly as toxic to human cells as it is to the microbes it attacks.
Picking out a face in the crowd is a complicated task: Your brain has to retrieve the memory of the face you’re seeking, then hold it in place while scanning the crowd, paying special attention to finding a match. A new study reveals how the brain achieves this type of focused attention on faces or other objects.
Univ. of Texas at Arlington and Texas Health Arlington Memorial Hospital are investigating whether bone grown from the body’s own stem cells can replace traditional types of bone grafting. The process, which has been successful in previous lab experiments, uses biodegradable polymer scaffolding material and bone morphogenetic protein, or BMP, which was inserted into the abdomen of mice to attract stem cells that in turn produced bone.
In the fight against “superbugs,” scientists have discovered a class of agents that can make some of the most notorious strains vulnerable to the same antibiotics that they once handily shrugged off. Recently discovered metallopolymers, when paired with the same antibiotics MRSA normally dispatches with ease, helped evade the bacteria’s defensive enzymes and destroyed its protective walls, causing the bacteria to burst.
Our fascination with mummies never gets old. Now the British Museum is using the latest technology to unwrap their ancient mysteries. Scientists at the museum have used CT scans and sophisticated imaging software to go beneath the bandages, revealing skin, bones, preserved internal organs, and in one case a brain-scooping rod left inside a skull by embalmers. The findings go on display next month in an exhibition.
In a north London hospital, scientists are growing noses, ears and blood vessels in a bold attempt to make body parts in the laboratory. It's far from the only laboratory in the world that is growing organs for potential transplant. But the London work was showcased this week hints at the availability of more types of body parts, including what would be the world's first nose made partly from stem cells.
Researchers have discovered that the so-called HOPE method allows tissue samples to be treated such that they do not only meet the requirements of clinical histology, but can still be characterized later on by modern methods of proteomics, a technique that analyzes all proteins at once. This differs from the traditional formalin-based approach that cross-links protein molecules.
Beckman Coulter Diagnostics has announced a strategic partnership with hc1.co of Indianapolis to help laboratories turn large amounts of clinical data into actionable insights. The new technology combines Beckman Coulter’s clinical diagnostic systems with hc1.com’s software-as-a-service product, Healthcare Relationship Cloud.
Engineers have demonstrated thin, soft stick-on patches that stretch and move with the skin and incorporate commercial, off-the-shelf chip-based electronics for sophisticated wireless health monitoring.
Scientists have published the first study explaining in detail how viruses reprogram the metabolism of the cells they invade to promote continued viral growth within an organism.
Pharmaceutical researchers in California, in collaboration with materials scientists, engineers and neurobiologists, have discovered a new mechanism for using near-infrared light to activate polymeric drug-delivering nanoparticles and other targeted therapeutic substances inside the body. This discovery represents a major innovation; up to now only a handful of strategies using light-triggered release from nanoparticles have been reported.
Researchers have reported they can generate human motor neurons from stem cells much more quickly and efficiently than previous methods allowed. The new method involves adding critical signaling molecules to precursor cells a few days earlier than previous methods specified. This increases the proportion of healthy motor neurons derived from stem cells (from 30 to 70%) and cuts in half the time required to do so.
Combatting the tissue degrading enzymes that cause lasting damage following a heart attack is tricky. Each patient responds to a heart attack differently and damage can vary from one part of the heart muscle to another, but existing treatments can’t be fine-tuned to deal with this variation. Univ. of Pennsylvania researchers have developed a way to address this problem via a material that can be applied directly to the damaged heart tissue.
Wounds may heal more quickly if exposed to low-intensity vibration, report researchers at the Univ. of Illinois at Chicago. The finding, in mice, may hold promise for the 18 million Americans who have type 2 diabetes, and especially the quarter of them who will eventually suffer from foot ulcers. Their wounds tend to heal slowly and can become chronic or worsen rapidly.
Researchers in Sweden have designed a paper filter which is capable of removing virus particles with the efficiency matching that of the best industrial virus filters. The paper filter, which is manufactured according to traditional paper making processes, consists of 100% high purity cellulose nanofibers directly derived from nature.
A new study gives a big boost to fixing a bad aortic valve, the heart's main gate, without open-heart surgery. Survival rates were better one year later for people who had a new valve placed through a tube into an artery instead. The results were reported at an American College of Cardiology conference in Washington and prompted some doctors to predict that in the near future, far fewer people will be having the traditional operation.
A new organ has been developed at George Washington Univ. to help return blood flow from veins lacking functional valves. A rhythmically contracting cuff made of cardiac muscle cells surrounds the vein acting as a 'mini heart' to aid blood flow through venous segments. The cuff can be made of a patient’s own adult stem cells, eliminating the chance of implant rejection.
A mathematical model created by Penn State Univ. researchers can predict with more than 90% accuracy the blood glucose levels of individuals with type 1 diabetes up to 30 min in advance of imminent changes in their levels, which is plenty of time to take preventative action. The model was estimated by the extended Kalman filtering technique and accounts for time-varying changes in glucose kinetics due to insulin and meal intake.
Call it “homo minutus”. A team at Los Alamos National Laboratory is developing four human organ constructs (liver, heart, lung and kidney) that will work together to serve as a drug and toxicity analysis system that can mimic the actual response of human organs. Called ATHENA, for Advanced Tissue-engineered Human Ectypal Network Analyzer, the system will fit neatly on a desk.
A new brain imaging study in Australia found a “stop mechanism” that determined brain signals telling the individual to stop drinking water when no longer thirsty. The study, which used magnetic resonance imaging, also gauged the brain effects of drinking more water than required.
The 3-D virtual reality cadaver floats in space like a hologram on an invisible gurney. Univ. of Michigan 3-D Lab employee Sean Petty stands a few inches away. Petty wears special glasses and pilots a joystick to arbitrarily slice away sections of the cadaver. He enlarges and turns the body for a better view of the detailed anatomy inside.
Adopted a common technique used in biochemistry, called agarose gel electrophoresis, researchers have investigated the damage to DNA that might have been caused by use of an atmospheric pressure plasma jet. This qualitative and quantitative study could ultimately lead to plasma-based tools for cancer therapy or hospital hygiene and other purposes.