A new nanodelivery system is able to sneak cancer treatments past the defenses of drug-resistant tumor cells—offering hope to many cancer patients who benefit little from existing drug treatments.
Researchers at the University of Tokyo designed small soapy clusters of molecules, called micelles, to carry drugs into tumor cells and release their cargo inside. The molecules harness the cell's internal transport system to get close to their target—the cell's DNA.
Genetically modified microbes could perform many useful jobs, from making biofuels and drugs, to cleaning up toxic waste. But designing the complex biochemical pathways inside such microbes is a time-consuming process of trial and error.
Christopher Voigt, an associate professor at the University of California, San Francisco, hopes to change that with software that automates the creation of "genetic circuits" in microbes. These circuits are the pathways of genes, proteins, and other biomolecules that the cells use to perform a particular task, such as breaking down sugar and turning it into fuel. Voigt and colleagues have so far made basic circuit components in E. coli. They are working with the large California biotechnology company Life Technologies to develop software that would let bioengineers design complete genetic circuits more easily.
Designing a microbe for a particular task would then be much like writing a new computer program, says Voigt. Just as programmers do not have to think about how electrons move through the gates in an integrated circuit, he says, biological engineers may eventually be able to design circuits for genes, proteins, and other biomolecules at a level of abstraction. "If we apply computational processes to things that bacteria can already do, we can get complete control over making spider silk, or drugs, or other chemicals," he says.
Today, a broken hip usually means surgery and extensive rehab. But what if all you needed was an injection and a shorter recovery period? That's the vision that inspires Thomas Webster, an associate professor of engineering at Brown University.
Webster has developed a nanomaterial that quickly solidifies at body temperature into a bone-like substance. This week, Brown announced a deal with medical device maker Audax Medical of Littleton, Massachusetts, to further develop the material and launch trials in animals.
(PhysOrg.com) -- Using nanocrystals of cellulose, the main component of pulp and paper, chemistry researchers at the University of British Columbia have created glass films that have applications for energy conservation in building design because of their ability to reflect specific wavelengths of light, such as ultra violet, visible or infrared.While vaccines for other infections can create immunity that lasts for decades, the flu virus has proved a more challenging adversary. Because the human immune system is so adept at recognizing it, the virus has evolved the ability to modify its most recognizable protein--called hemagglutinin--from year to year. So every year, six months prior to flu season, the U.S. Food and Drug Administration devises the country's annual vaccine according to its best guess for which strains will be most virulent. And every year, we need another flu shot.
Palese's experimental vaccine, however, targets a part of the hemagglutinin protein that remains relatively stable over time, enabling its broad immunizing effects.
