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Tag: "killing" at biology news

Mice lacking key immune component still control chronic viral infections

...sponsible for recognizing virus-infected cells and killing them or sounding alarms that summon other defensive measures. To enable this recognition process, other cells regularly chop up viral proteins found in their interiors and display them on their surfaces. MHC Class I molecules act as a kind of stage f...

Purdue creates new low-cost system to detect bacteria

...ut the procedure without staining, manipulating or killing the biological samples. "The power of this technology is that it does not require complicated lab equipment, and it could be designed so that it wouldn't require someone with a doctoral degree to operate. The whole beauty of the system is you don't...

Radiation-killed bacteria vaccine induces broad immune response in mice

...er, traditional ways of making vaccines--either by killing disease-causing agents with heat, chemicals or by ... a superior vaccine compared with other methods of killing the pathogen." The investigators inactivated Listeria with lethal doses of gamma radiation and t...

Research reveals control of potent immune regulator

...lls and other cell types, plays a critical role in killing pathogen-infected cells and in defending against tumor cells. However, overproduction of IFNg is also dangerous to the body and can cause autoimmune diseases. But exactly how the body tightly controls IFNg production ?and, therefore, NK-cell activity...

Virus has 'catastrophic' affect on red squirrels, research shows

...to England's 16 designated red squirrel refuges by killing the small numbers of greys that may come in. Squirrel poxvirus is passed to reds by grey squirrels, and probably arrived to Britain with some of the greys that were introduced from North America over 100 years ago. The virus does not appear to har...

Global study shows all tobacco bad for the heart

...Smoking is the leading preventable cause of death, killing 47,000 Canadians each year through direct smoking and exposure to second-hand smoke," said Rocco Rossi, CEO, Heart and Stroke Foundation of Ontario. "We have been a successful advocate for a smoke free Ontario and have achieved one of the strongest p...

Viral hitchhiker inhibits Wolbachia bacteria's ability to proliferate

...cess. But viruses pirate cells to reproduce, often killing the cells as a result. So Bordenstein and his colleagues hypothesized that by preying on Wolbachia cells, the WO-B virus might reduce the incidence of cytoplasmic incompatibility in a host, not promote it. Using DNA analysis and electron microscop...

'Sticky' mice lead to discovery of new cause of neurodegenerative disease

...ion could fold improperly, clogging and eventually killing cells. When Ackerman and her colleagues examined the Purkinje cells of sticky mouse mutants, this is exactly what they saw. They also detected biochemical evidence that the cells were making an unsuccessful effort to tag and destroy the accumula...

Combined treatment extends life expectancy for lung cancer patients

...ching the center of the tumor, but not necessarily killing all the cells at the edges. This can lead to a recurrence of the tumor, and the cancer may spread. Thermal ablation is delivered directly to cancerous cells with the guidance of a diagnostic image showing the tumor's location. However, if some cancer...

UGA researchers find that hunting can increase the severity of wildlife disease epidemics

...rgia researchers shows that the common practice of killing wild animals to control disease outbreaks can actu...ntrary to what you expect." The reasoning behind killing wild animals to control disease outbreaks is simple: fewer animals should result in reduced transmis...

Tumor wizardry wards off attacks from the immune system

...eg cells inhibit immune components responsible for killing unwanted cells -- this allows T-reg cells to help prevent autoimmune reactions. The scientists discovered that cancerous cells take advantage of T-reg cells' suppressor ability, enlisting them to keep the immune system at bay. Their report appears ...

Bird brains shrink from exposure to contaminants

...k out a territory. "The issue is not that DDT is killing these robins but if they are growing up in this one area and then move to another, they won't be able to attract any females." These effects were most prominent in the males, some of which experienced up to a 30 per cent reduction in brain region s...

Global warming may have damaged coral reefs forever

...to increase to unprecedented and sustained levels, killing off (or 'bleaching') more than 90 per cent of the inner Seychelles coral. The team, led by the University of Newcastle upon Tyne, and which comprises researchers from the UK, Australia and the Seychelles, publishes its findings today, Monday May 1...

Harmful Algal Blooms monitored from space in Chile

... concentration of oxygen in sea water, potentially killing larger caged fish such as salmon that cannot flee the affected area. In the case of shellfish, such as mussels, toxins from the blooms accumulate in their body tissues and pose serious health risks for humans when consumed. For instance, in 2002 ...

Researcher studies, treats military with 'silent disease'

... is the twelfth leading cause of death by disease, killing about 26,000 people each year, according to The National Digestive Diseases Information Clearinghouse Web site. Sjogren's clinic provided treatment to "just about everybody unless they have very minimal disease or liver damage," she said. "We may n...

University of Minnesota researchers take new look at cellular suicide

...om ultraviolet light, and appears to be a means of killing the cell before it can become dysfunctional or cancerous. The proteins are produced by two cellular processes, both of which must be set in motion before the proteins can gang up on the DNA molecule and seal the cell's fate. The researchers describe ...

Origen publishes in Nature a robust and versatile method for creating transgenic chickens

...noclonal antibodies having greatly enhanced cancer killing activity compared to antibodies produced via conve...e ability to produce antibodies with enhanced cell killing properties, the time from antibody identification to production in eggs is a matter of months, the p...

Scientist works to improve treatment for brain tumors

...ptor and to determine the most effective toxin for killing glioblastoma cells, while leaving normal cells unharmed. "Our aim is to identify the drug design that has the most potent anti-tumor efficacy," he said. Debinski will also explore how cancer cells' lack of oxygen affects the treatment. Hypoxia, a l...

Rhesus monkeys in Nepal may provide new alternative for HIV/AIDS research

...people seeking to solve this problem by chasing or killing macaques. "One of the goals of our international program is to assist our collaborators in creating the first primate research center in Nepal and to help address some of Nepal's most pressing health concerns that include HIV, tuberculosis, hepatiti...

Biotech cotton provides same yield with fewer pesticides

...plants. Some have suggested that, in addition to killing the target pests, insecticide-containing crops like Bt cotton would also kill beneficial and non-target arthropods. The new study found that Bt cotton, also known as transgenic cotton, does not affect the biodiversity of insects in cotton fields. ...

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