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Tag: "causes" at biology news

Naturally occurring asbestos linked to lung cancer

...portive evidence that naturally occurring asbestos causes mesothelioma - and public efforts should now shift...al studies of mesothelioma have found occupational causes for most but not all cases of the disease. In some undeveloped areas of the world, including parts o...

UIC developing drug for SARS

... to thwart the human immunodeficiency virus, which causes AIDS. "Data from SARS patients indicate that replication of the virus peaks 10 days after the onset of fever," said Michael Johnson, director of the Center for Pharmaceutical Biotechnology in the UIC College of Pharmacy and the study's principal inv...

Secret sex life of killer fungus?

... their study of the mechanisms by which the fungus causes disease. Further work is now aimed at seeing if the fungus can truly reproduce by sexual means. ...

Sugar helps control cell division

...nting a cell from removing the sugar from proteins causes the cell to copy its genetic material and make new nuclei, but to fail to divide in two. The end result is cells with more than one nucleus -- a situation fairly common in cancer cells. "Cells with more than one nucleus can survive, but they are dys...

Life-extending protein keeps blood sugar in check

...make or respond to insulin in people with diabetes causes blood sugar levels to rise. The researchers found that Sirt1 is present in pancreas cells that secrete insulin hormone. Mice genetically modified to have an excess of Sirt1 in b cells of the pancreas had improved glucose tolerance and enhanced insul...

Sea Ice May Be on Increase in the Antarctic

...make or respond to insulin in people with diabetes causes blood sugar levels to rise. The researchers found that Sirt1 is present in pancreas cells that secrete insulin hormone. Mice genetically modified to have an excess of Sirt1 in b cells of the pancreas had improved glucose tolerance and enhanced insul...

Scientists uncover new clues about brain function in human behavior

...normality, Williams Syndrome, a rare disorder that causes unique changes in social behavior. This comparison enabled the researchers to both define a brain circuit for social function in the healthy human brain, and identify the specific way in which it was affected by genetic changes in Williams Syndrome. ...

Gaining ground in the race against antibiotic resistance

... lactamase gene found in Bacillus anthracis, which causes anthrax. Together, the four mutations identified by the group increased the enzyme's efficiency at inactivating cephalexin seven-fold. The mutations influenced the enzyme's active site, where the chopping of antibiotic molecules takes place. One of ...

World-first technology enables study of ancient bacteria

...bed of the Bermuda Triangle becomes unstable; this causes instability of the sea and an explosive mixture of air and methane above. Any ships or planes travelling over the area could sink or catch fire. "So ancient, deep-sediment bacteria may be a key to sustainable energy in the future and to explaining a...

Mosquito study shows new, faster way West Nile can spread

...us and possibly other viruses such as the one that causes dengue fever. According to that theory, many vertebrates were considered to be "dead-end hosts" that did not pass along the virus. Only birds, which develop much higher levels of the West Nile virus in their blood, were thought capable of passing it ...

Genomics researchers discover protein deficit that causes drug toxicity

...nts. The mechanism decreases a protein and in turn causes certain individuals to metabolize thiopurine drugs differently. Thiopurine therapies are used to treat patients with childhood leukemia, autoimmune diseases and organ transplants. The Mayo researchers say their finding advances the field of pharmacog...

Researchers find how some antibiotics kill bacteria

...cluding Neisseria meningitidis, the bacterium that causes one form of meningitis; Helicobacter pylori, which causes stomach ulcers; and even some parasitic worms by eliminating the symbiotic bacteria parasites depend...

Sensor web simulation investigates technique to improve prediction of pollution across the globe

...00 feet. In some cases air pollutants have natural causes such as lightning induced wildfires that can emit large plumes of particulates into the troposphere. Fossil fuel burning in industrial areas and vehicular traffic in metropolitan areas are also major pollutant sources. Complex chemical interactions a...

Scientists use gene transfer technology and common virus to block neuropathic pain in animals

... called herpes simplex or HSV ?the same virus that causes cold sores and genital herpes. The scientists use a disabled form of the virus, called a vector, to deliver genes to the nucleus of neural cells. A study published today in the June, 2005 of the Annals of Neurology describes how laboratory rats with...

Variant prion protein causes infection but no symptoms

...ek-old mice to different strains of the agent that causes scrapie, a brain-wasting disease of sheep. Within 150 days of being inoculated with the natural form of scrapie prion protein, all 70 mice in the control group showed visible signs of infection: twitching, emaciation and poor coordination. In contras...

Einstein researchers identify new way that bacteria develop resistance to antibiotics

...vered a novel strategy by which the bacterium that causes tuberculosis may soon be able to resist the effects of antibiotics known as fluoroquinolones. The finding explains why several disease-causing microbes, including Shigella and E. coli, are rapidly becoming resistant to fluoroquinolones. The internat...

Molecular trigger for Huntington's disease found

...rmal protein produced in Huntington's disease (HD) causes the central pathologies of the disease. The abnorm...' experiments also revealed that this p53 increase causes an overactivation in the genes regulated by p53, which is called a "nuclear transcription factor" be...

UCLA scientists reveal how Nipah virus infects cells

...desh. Animals spread the virus to people, where it causes life-threatening respiratory and neurological diseases that kill up to 70 percent of patients ?a danger level equivalent to the Ebola virus. To infect a cell, viruses must bind to a viral-specific receptor on the cell's surface in order to penetrate...

Exercise aside, genes may ultimately dictate seniors' mobility

... the genotype creates also may yield clues to what causes mobility limitations to develop with age, and what people can do to stay active, Pahor said. Those with the II genotype, for example, tended to have higher total body fat. "The good news is that regardless of genotype, the physically active people w...

Scavenger cells could be key to treating HIV-related dementia

...tudy. "In a way, it's not the virus that directly causes the dementia," Salemi said. "It's the fact that th...plain why current drugs cannot kill the virus that causes AIDS. Researchers have known for years how HIV replicates in T cells, also part of the immune syste...

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