Bacterial infections usually announce themselves with pain and fever but often can be defeated with antibiotics—and then there are those that are sneaky and hard to beat. Now, scientists have built a new weapon against such pathogens in the form of tiny DNA pyramids. Published in ACS Applied Materials & Interfaces, their study found the nanopyramids can flag bacteria and kill more of them than medicine alone.
Scientists working to make gene therapy a reality have solved a major hurdle: how to bypass a blood stem cell’s natural defenses and efficiently insert disease-fighting genes into the cell’s genome. In a new study, a team of researchers report that the drug rapamycin, which is commonly used to slow cancer growth, enables delivery of a therapeutic dose of genes to blood stem cells while preserving stem cell function.
A team of scientists in Japan and New Zealand have combined lasers, nanotechnology, and neuroscience to develop a new, versatile drug delivery system. The precise timing of a femtosecond laser is used to release dopamine, a neurochemical, that is dysfunctional in Parkinson’s Disease in a controlled and repeatable manner that mimics the natural dynamic release mechanism.
Current drug delivery systems used to administer chemotherapy to cancer patients typically release a constant dose of the drug over time, but a new study challenges this "slow and steady" approach and offers a novel way to locally deliver the drugs "on demand," as reported in the Proceedings of the National Academy of Sciences.
Researchers at The Johns Hopkins Univ. report they have deciphered the inner workings of a protein called YiiP that prevents the lethal buildup of zinc inside bacteria. They say understanding YiiP's movements will help in the design of drugs aimed at modifying the behavior of ZnT proteins, eight human proteins that are similar to YiiP, which play important roles in hormone secretion and in signaling between neurons.
The Food and Drug Administration on Friday approved a new antibiotic from Cubist Pharmaceuticals to treat common skin infections often acquired in the hospital. Regulators cleared the company's Sivextro as a pill and as an intravenous solution for adults with skin infections caused by bacteria that are often resistant to older antibiotics.
HIV-1, the virus responsible for most cases of AIDS, is a very selective virus. It doesn’t readily infect species other than its usual hosts. While this would qualify as good news for most mammals, for humans this fact has made the search for effective treatments and vaccines for AIDS that much more difficult; without an accurate animal model of the disease, researchers have had few options for clinical studies of the virus.
Think of the human body as an intricate machine whose working parts are proteins: molecules that change shape to enable our organs and tissues to perform tasks such as breathing, eating or thinking. Of the millions of proteins, 500 in the kinase family are particularly important to drug discovery. Kinases are messengers: They deliver signals that regulate and orchestrate the actions of other proteins.
Researchers from North Carolina State Univ. have developed a technique to control populations of the Australian sheep blowfly—a major livestock pest in Australia and New Zealand—by making female flies dependent upon a common antibiotic to survive.
Researchers at the Univ. of Michigan have obtained the first 3-D snapshots of the "assembly line" within microorganisms that naturally produces antibiotics and other drugs. Understanding the complete structure and movement within the molecular factory gives investigators a solid blueprint for redesigning the microbial assembly line to produce novel drugs of high medicinal value.
The government's top drug abuse experts are struggling to find ways to expand use of a medicine widely considered the best therapy for treating heroin and painkiller addiction, but which remains underused. Senator Carl Levin of Michigan on Wednesday pressed government officials and agencies to increase access to the buprenorphine, a drug which helps addicts control drug cravings and withdrawal symptoms.
After a large stroke, motor skills barely improve, even with rehabilitation. An experiment conducted on rats demonstrates that a course of therapy combining the stimulation of nerve fiber growth with drugs and motor training can be successful. The key, however, is the correct sequence: Paralyzed animals only make an almost complete recovery if the training is delayed until after the growth promoting drugs have been administered.
Researchers at the Univ. of Tennessee (UT) are a step closer to creating a prophylactic drug that would neutralize the deadly effects of the chemical weapons used in Syria and elsewhere. Jeremy Smith, UT-ORNL Governor’s Chair and an expert in computational biology, is part of the team that is trying to engineer enzymes—called bioscavengers—so they work more efficiently against chemical weapons.
A bold new way to test cancer drugs started Monday. Like a medical version of speed dating, doctors will sort through multiple experimental drugs and match patients to the one most likely to succeed based on each person's unique tumor gene profile. Five drug companies, the government, private foundations and advocacy groups are taking part.
Researchers have determined that a copper compound known for decades may form the basis for a therapy for amyotrophic lateral sclerosis (ALS), or Lou Gehrig’s disease. In a new study, scientists showed in laboratory animal tests that oral intake of this compound significantly extended the lifespan and improved the locomotor function of transgenic mice that are genetically engineered to develop this debilitating and terminal disease.
An international team of scientists, led by researchers at the Univ. of California, San Diego School of Medicine, have identified the genes encoding a molecule that famously defines Group A Streptococcus (strep), a pathogenic bacterial species responsible for more than 700 million infections worldwide each year.
One of the defining features of cells is their membranes. Each cell’s repository of DNA and protein-making machinery must be kept stable and secure from invaders and toxins. Scientists have attempted to replicate these properties, but, despite decades of research, even the most basic membrane structures, known as vesicles, still face many problems when made in the laboratory.
Staph infections that become resistant to multiple antibiotics don't happen because the bacteria themselves adapt to the drugs, but because of a kind of genetic parasite they carry called a plasmid that helps its host survive the antibiotics. Plasmids are rings of bare DNA containing a handful of genes that are essentially freeloaders, borrowing most of what they need to live from their bacterial host.
Merck will spend nearly $4 billion for Idenix Pharmaceuticals with a per-share bid that more than triples the hepatitis C drug developer's latest closing price. Pharmaceutical companies are racing to test new and potentially lucrative treatments for hepatitis C, a blood-borne disease that causes liver damage and is expected to become more common as the U.S. population ages.
In the battle against stubborn skin infections, including methicillin-resistant Staphylococcus aureus (MRSA), a new single-dose antibiotic is as effective as a twice-daily infusion given for up to 10 days, according to a large study led by Duke Medicine researchers. Researchers said the advantage of the new drug, oritavancin, is its potential to curtail what has been a key driver of antibiotic resistance.
The first preclinical study of a new Rice Univ.-developed anticancer technology found that a novel combination of existing clinical treatments can instantaneously detect and kill only cancer cells without harming surrounding normal organs. The research reports that Rice’s “quadrapeutics” technology was 17 times more efficient than conventional chemoradiation therapy against aggressive, drug-resistant head and neck tumors.
Biomedical engineering researchers have developed daisy-shaped, nanoscale structures that are made predominantly of anticancer drugs and are capable of introducing a “cocktail” of multiple drugs into cancer cells. The researchers are all part the joint biomedical engineering program at North Carolina State Univ. and the Univ. of North Carolina at Chapel Hill.
A pathway to the design of even more effective versions of the powerful anticancer drug Taxol has been opened with the most detailed look ever at the assembly and disassembly of microtubules, tiny fibers of tubulin protein that form the cytoskeletons of living cells and play a crucial role in mitosis.
Chemists at The Scripps Research Institute have determined the correct structure of a highly promising anticancer compound approved by the U.S. Food and Drug Administration for clinical trials in cancer patients. The new report, published in Angewandte Chemie, focuses on a compound called TIC10.
Photodynamic therapy (PDT) is an effective treatment for easily accessible tumors such as oral and skin cancer. But the procedure, which uses lasers to activate special drugs called photosensitizing agents, isn’t adept at fighting cancer deep inside the body. That could change because of a new technology that could bring PDT into areas of the body which were previously inaccessible.