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Tag: "leave" at biology news

Shorter colds, milder flu may follow from newly revealed immune mechanism

...ecame apparent that the macrophages were unable to leave because they were infected with virus and so were dying prematurely. Unexpectedly, the investigators found that CCL5 turns on signals that allow cells to escape virus-induced death. These signals are termed anti-apoptotic because they work against a...

Tuberculosis still a risk for patients receiving HIV drugs

...zani in Rome. But they don't necessarily have to leave the country to contract TB. HIV-infected American and European patients who are "exposed to someone with tuberculosis, for example in a hospital setting, are at increased risk of acquiring tuberculosis infection and of developing active tuberculosis ...

Researchers make long DNA 'wires' for future medical and electronic devices

...urface. Depending on how they place the comb, they leave behind strands of different lengths and shapes. "Basically, we're doing nanotechnology using only a piece of rubber and a tiny droplet of DNA solution," Guan said. Computer chips that bridge the gap between the electronic and the biological could m...

Biologists discover new pathway into plant cells

...toxic effect associated with it. "What that would leave us with is a type of delivery vehicle, a completely new way to deliver compounds inside of a plant cell and target specific genes. This is a new and unprecedented insight into how plants can work." The process of proteins getting inside of cells and...

Simple idea to dramatically improve dengue vaccinations

...une system's tendency to go-with-what-it-knows can leave us more vulnerable to infection from a mutant strain or a related virus. The immune system may respond less favorably in these cases than if it had never been exposed to the disease in the first place." Original antigenic sin, or immunodominance, ar...

Taking a bite out of a fellow worker helps wasps recruit new foragers

...s might bite you to communicate that it is time to leave the nest and forage for the colony, according to research by a University of Washington animal behaviorist. Biting is a way that workers in a colony of the social wasp Polybia occidentalis recruit new foragers to gather water, food and building mate...

New University of Toronto research a 'pore' excuse for engineering

... The scientists then washed away the surfactant to leave a nanoporous material. When they examined the thin film that remained, they discovered that it made an excellent insulator that could be used to separate tiny wires inside microelectronics. "It demonstrates how creative chemistry can lead to really ...

Ancient DNA provides clues to the evolution of social behavior

... entirely subterranean, colonial tuco-tucos rarely leave their burrows except for brief forays to collect t...grassy vegetation on which they feed. When they do leave their colonies, the rodents often make a tasty meal for prowling owls. For thousands of years, these...

Molecular mechanism may explain how fevers spark seizures

...bitory GABA-A receptors on the cell membrane could leave a neuron open to the excitation and repetitive firing that characterizes seizures. The investigators are currently studying where the receptors go when the temperature is raised -- are they taken inside the cell more quickly, are they degraded, is th...

Tumor cells that border normal tissue are told to leave

...gy. "They were exclusively the ones that tended to leave the tissue." The tumors were generated by turning...t could cut a patient's risk of having tumor cells leave the area before the primary tumor was eradicated. That's essential--metastatic cancer is far harder ...

Paleontologists learn how not to become a fossil

...es they've documented in the fossil record. First, leave out the poorly documented groups. "Set some kind of cutoff on the quality of the record you're going to include in your analysis," Jablonski said. "Sometimes focusing on the most reliable fraction of the record will be the best way to go." Second, u...

Dogs keep dying: Many owners unaware of toxic dog food

...as been an immensely sad holiday and one that will leave an indelible mark on the owners that lost their cherished family members." Of those 17 dogs, Center euthanized 12 when it became clear they could not survive; five are still being treated. Dogs that have survived had consumed a smaller amount of the...

FDA approves first medical device using rutgers biomaterial

...e precise placement during the surgical repair and leave less implant material following the resorption of the coating. Hernias occur when musculature fails and one part of the body protrudes through the resulting gap or opening into another part of the body. And although a hernia can theoretically devel...

Albatross study shows regional differences in ocean contamination

... same sites in the Hawaiian Islands. But when they leave their breeding colonies on foraging trips, the black-footed albatrosses head northeast toward the West Coast of North America, while Laysan albatrosses head northwest toward the northern and western regions of the North Pacific. Black-footed and La...

Vegetables inhibit growth of prostate cancer in mice with human tumors

... same sites in the Hawaiian Islands. But when they leave their breeding colonies on foraging trips, the black-footed albatrosses head northeast toward the West Coast of North America, while Laysan albatrosses head northwest toward the northern and western regions of the North Pacific. Black-footed and La...

Discovery may speed forest biotechnology

..., via normal sexual crosses, remove the FT gene to leave behind trees that no longer have it, nor reproduce abnormally early. In other cases, a modestly strong FT gene might be left in place to provide sustained benefits, such as earlier or more heavily flowering fruit tree varieties. Especially in situat...

Epidemic of unneeded amputations

...promotes wound healing, often enabling patients to leave the hospital the next day. CLiRpath has been the subject of rigorous clinical trials, with limb salvage observed in 95 percent of patients surviving to six months(1). The procedure is now available in more than 300 hospitals across the U.S. Amputat...

Mosquito spray increases toxicity of pyrethroids in creek, study finds

...orities may want to consider advising residents to leave their outdoor furniture unused in the sun for a day or two to let the pyrethrin and PBO residue degrade rather than send the runoff into the creeks. ...

Drug triggers body's mechanism to reverse aging effect on memory process

...fect on LTP will be maintained after the ampakines leave the system. The lingering presence of LTP also appears to contribute to BDNF remaining in the body, researchers said. "Ampakines work in two important ways to improve learning and memory," Lauterborn said. "They directly stimulate the connection be...

Bones hold the key to blood renewal

...ang on to their juvenile qualities. Only when they leave the niches do they morph into specialized blood cells, possibly becoming immune cells for fighting infection or cells for blood clotting and healing after injury. They can even respond to calls for help from organs such as the liver, migrating throug...

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