system 2 6

Tag: "system" at biology news

Transfusion expert urges wider use of filtered blood

...es the transfused blood modifies a person's immune system ?either in a favorable or unfavorable way ?by interacting with the patient's own white cells. Removing the foreign white cells from transfused blood reduces the chances of a negative reaction by the host immune system. In 1998 the University's Str...

Brain's reward circuit activity ebbs and flows with a woman's hormonal cycle

...gs of the National Academy of Sciences. Reward system circuitry includes: the prefrontal cortex, seat of thinking and planning; the amygdala, a fear center; the hippocampus, a learning and memory hub; and the striatum, which relays signals from these areas to the cortex. Reward circuit neurons harbor r...

Jefferson scientists find rabies-based vaccine could be effective against HIV

... vaccination, they then tried two different immune system boosts, but didn’t see enhanced immune responses. ...ed various parameters of infection, such as immune system CD4 cell count, amount of virus in the bloodstream and immune system antibody response. They found t...

Red flag for repetitive stress injuries identified for first time in humans

...h issue of Clinical Science, found that the immune system pumps out biomarkers (different kinds of chemicals) as the body begins to become injured by repetitive motions. These biomarkers warn of an underlying problem. "While not a diagnostic test, because the biomarkers could also indicate another type o...

Researchers from the University of Navarra analyze new kinds of cancer-fighting antibodies

... therapy the antibodies are directed to the immune system cells in order to provoke a stronger reaction against cancer. This has the advantage of exploiting a mechanism with an action distinct from the other strategies currently being used to treat cancer, and is capable of interacting with the current trea...

UC Davis researchers use heated nanoprobes to destroy breast cancer cells in mice

... Nuclear Medicine. "We have demonstrated that the system is feasible in laboratory mice. The next step will..., seeks to solve this problem. The experimental system uses bioprobes created by wedding magnetized iron-oxide nanospheres to radiolabeled monoclonal antib...

Male-killing bacteria makes female butterflies more promiscuous

...opulations of tropical butterfly the entire mating system is determined by a group of bacteria known as Wolb...nity because it demonstrates how a species' mating system can be determined by the frequency of a parasite....

Researchers design pulsed mircrojet system to deliver protein drugs without pain or bruising

..., California, has designed a novel pulsed microjet system engineered to deliver protein drugs into the skin ...time. The research showed that the pulsed microjet system could be used to effectively deliver drugs for local and systemic applications without using needles...

Action video games sharpen vision 20 percent

... says Bavelier. "These games push the human visual system to the limits and the brain adapts to it. That learning carries over into other activities and possibly everyday life." The improvement was seen both in the part of the visual field where video game players typically play, but also beyond—the part ...

Mine runoff continues to provide clues to microbial diversification

...aboratory established these communities as a model system in the mid-1990s. This latest publication builds upon research that was published in May 2005 by Science. In that paper, Banfield, Hettich and colleagues at ORNL describe the bacterial community that thrives in what amounts to sulfuric acid. Their...

Major gene study uncovers secrets of leukemia

...hite blood cells that normally develop into immune system cells, called B or T lymphocytes, instead multiply rapidly and overwhelm the normal blood cells the body needs to survive. The St. Jude team used microarrays, postage-stamp-sized chips that contain DNA fragments, which allowed researchers to inve...

Researchers learn what sparks plant growth

...uts to rest a century-old debate over which tissue system in plants drives and restricts cell growth. "Our work exposes the presence of cell-cell communication during growth, from the epidermis to the inner layers. Such a mode of communication is important for plants to maintain a coherent and coordinate...

New compound prevents alcoholic behavior, relapse in animals by blocking stress response

...thin a day or so. The new study shows that the CRF system becomes overactive in the long term in animals with a history of alcohol dependence, increasing the risk for relapse. Heilig and his team showed that MTIP blocked the activity of CRF in stressful situations without affecting its activity under or...

Veterinary scientists explore poultry virus as cancer killer

... Newcastle disease virus through a reverse genetic system to target prostate cancer specifically. Revers...Normal, healthy cells have an interferon antiviral system that activates upon infection with NDV thereby preventing replication of the virus, explains Dr. Sub...

New details on how the immune system recognizes influenza

...veals in molecular detail exactly where the immune system focuses on the viruses. Although the complete molecular structures of essentially all major strains of influenza viruses are known, immune responses concentrate on limited regions of certain parts of the virus, and these regions must be identified as...

Woven scaffolds could improve cartilage repair

...eating these injuries. One of the beauties of this system is that since the cells are from the same patients, there are no worries of adverse immune responses or disease transmission. "The scaffold will give surgeons the opportunity to treat their patients immediately, while patients won't have to wait f...

LIAI completes world's most comprehensive analysis on influenza virus data

...sitory of scientific data on how the body's immune system responds to infectious agents -- under a $25 million contract awarded by the NIAID in 2004. The database places particular emphasis on emerging infectious diseases, such as West Nile virus, along with those diseases considered potential bioterror...

Prehistoric origins of stomach ulcers uncovered

...ach ulcers has been present in the human digestive system since modern man migrated from Africa over 60,000 years ago. The research, published online today (7 February) by the journal Nature, not only furthers our understanding of a disease causing bacteria but also offers a new way to study the migration a...

Scientists learn the origin of rogue B cells

...have long wondered why, in some people, the immune system turns against parts of the body it is designed to ...one likely factor: the early development of immune system cells called B cells. B cells are formed in the bone marrow and produce antibodies. Antibodies are ...

Mimicking how the brain recognizes street scenes

... science." "We developed a model of the visual system that was meant to be useful for neuroscientists in...semblance to real-world images. "We put together a system that mimics as closely as possible how cortical cells respond to simple stimuli like the ones that a...

1 2 3 4 5 6 7 8 9 10