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Tag: "caused" at biology news

Scratch no more: Gene for itch sensation discovered

...Chronic itching is a widespread problem. It can be caused by skin disorders like eczema, or it can stem from a deeper problem such as kidney failure or liver disease. It can be a serious side effect of cancer therapies or powerful painkillers like morphine. For some people, chronic itching can be very disru...

Old memory traces in brain may trigger chronic pain

...igger effect on suffering.” Chronic pain is not caused by a single mechanism, Apkarian noted. Sensory abnormalities in people with chronic pain probably drive this memory abnormality. About 10 percent of the United States population suffers from chronic pain, of which the majority is back pain. On...

Snoring in children might be an allergic type disease

...dded. “In adults habitual snoring is seen as being caused by anatomical problems in the airway or obesity. But in children it seems that snoring is much more closely related allergy and inflammation”. “Our data hopefully contribute to a clinician’s ability to effectively spot snoring in pre-school childr...

Dirty snow may warm Arctic as much as greenhouse gases

...r, and their colleagues calculated that dirty snow caused the Earth’s temperature to rise .1 to .15 degree, ...he Arctic has warmed about 1.6 degrees. Dirty snow caused .5 to 1.5 degrees of warming, or up to 94 percent of the observed change, the scientists determined....

Largest synthetic gene ever built offers insights into anti-malarial drug resistance

...with red blood cells can develop malaria, which is caused by a single-cell protozoan parasite transmitted by the bite of the female Anopheles mosquito. There are about 160 different species of malaria parasites, according to Roepe. Five infect humans, but P. falciparum is responsible for about 1 million dea...

New bacterium discovered -- related to cause of trench fever

...War I. That bacterium, called Bartonella quintana, caused a disease known as trench fever, and debilitated t...AIDS patients in the U.S was the same species that caused trench fever in WWI soldiers fighting in Europe 80 years before. The work was published in “The New ...

Study shows big power of small RNAs, not just proteins, in halting cancer

..., reactivation of a previously damaged p53 pathway caused cancer tumors to stop growing and even eliminate themselves by activating an immune response in surrounding healthy cells. Most suspected that proteins would be revealed as key to the power of p53, but this latest research published June 6 by Nature...

Microbes at work cleaning up the environment

...d experiments, the team concluded that the protein caused the zinc-sulfide nanoparticle aggregation. The researchers conducted experiments guided by known bacterial metal-binding proteins that bind zinc and other potentially toxic metals at cysteine locales. Cysteine is a sulfur-containing amino acid. Am...

Herpes virus hijacks DNA repair process

... The DNA damage response normally fixes DNA errors caused by radiation or other environmental factors, or mi...rpes virus from activating the DNA damage response caused viral replication rates to plummet. "We don't want to treat viral infection by blocking DNA damag...

Study finds mix of disease processes at work in brains of most people with dementia

... people with all three conditions). Infarcts alone caused another 12 percent of the cases. Also, 80 of the 141 volunteers who died had sufficient Alzheimer’s disease pathology in their brains to fulfill accepted neuropathologic criteria for Alzheimer’s disease, although in life only 47 were clinically diagn...

Runners -- Let thirst be your guide

...getown. “The data clearly indicate that EAH is caused by excess drinking during endurance exercise activities, and that it can be prevented by limiting fluid intake while exercising, he says. But despite this knowledge, Verbalis points out that “unfortunately, we are not seeing this condition go away." ...

Gene responsible for common hearing loss identified for first time

...people. Otosclerosis is a multifactorial disease, caused by an interaction of genetic and environmental factors. The outcome is a progressive hearing loss as the growing bone in the middle ear interrupts the sound waves passing to the inner ear. While the causative factors remain unknown, now one of the ge...

Clot-dissolving agent may be beneficial in treatment of severe frostbite

...he researchers suspect tPA helps reduce the injury caused when frozen skin is warmed again. Inflammation during thawing typically stimulates clotting that blocks small blood vessels, leading to cell death. Because tPA reverses this clotting, blood flow is restored before permanent damage is done. “Based ...

Potato wart eyed as risk to potato production

...o that has been detected worldwide. Potato wart is caused by the fungus Synchytrium endobioticum, which is considered to be the most important worldwide quarantine plant pathogen of potato. While not harmful to humans, the disease causes unsightly growths that initially appear white, and then turn brown or ...

Researchers demonstrate way to control tree height

...o create about 600 genetically modified trees. All caused decreased signaling by gibberellic acids. They were grown in the field with USDA approval, and assessed several times for variation in size and appearance. Other than reduced size, there appeared to be striking variation in foliage color and leaf ...

Blood-brain barrier breached by new therapeutic strategy

... (siRNA), was shown to protect mice from infection caused by the Japanese encephalitis virus (JEV). Manjunath N. Swamy, M.D., of the CBR Institute for Biomedical Research and Harvard Medical School in Boston, and his colleagues used JEV to infect the brains of mice. They then injected the antiviral siRNA ...

Fat fish put obesity on the hook

... faster and cheaper.” In the study, researchers caused obesity in zebrafish by introducing the same type of genetic mutation that causes severe obesity in humans. The genetic change blocks the activity of a receptor, the melanocortin-4 receptor, which is at the heart of a “device” in our brains called th...

Researchers identify protein pathway involved in Parkinson disease development

...d generate energy. Oxidative stress is the damage caused to cells by reactive oxygen produced during oxygen metabolism. Although cells have mechanisms in place to protect against oxidative damage, this system can break down in the face of environmental challenges or genetic mutations. The Emory re...

Prey not hard-wired to fear predators

...en wolves returned to the Yellowstone region, they caused a cascade of events including a change in elk distribution, more wariness in moose, and a change in coyote densities. By contrast , where wolves and grizzly bears were lost, migratory birds including warblers and hummingbirds were less abundant beca...

St. Jude study shows genes play an unexpected role in their own activation

... tissues are using it and which signaling molecule caused cAMP to put CREB to work,” Brindle said. “It is another clue to how CREB might activate the genes for enzymes that make glucose in the liver, while activating different genes in the brain that are key to learning and forming memories.” A long-term...

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