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Tag: "radiation" at biology news

'Shuttling' protein possibly key to resilience of cancer cells

...ole in cancer's ability to resist chemotherapy and radiation treatment and that also may be involved in Alzheim... to target cancer stem cells while chemotherapy or radiation is administered, Hu said. Research findings are detailed in a paper appearing this month in the EMB...

Molecular force field helps cancer cells defend against attack

...ing a protective barrier that deflects damage from radiation or chemotherapy and promotes tumor cell survival. But in laboratory experiments, UF scientists were able to block the union, and the malignant cells died. The findings are opening new avenues of research that could lead to improved cancer therapies, ...

Enzyme crystal structure reveals 'unexpected' genome repair functions

...ic agents like the chemotherapy drug cisplatin and radiation therapy work by essentially damaging DNA, any new understanding of the DNA repair mechanism could mean potential improvements in the treatment of cancer," Tainer says. Prior to this study, there were no specific models for how XPB acts in DNA separa...

Radiotherapy advance points way to noninvasive brain cancer treatment

...ionally invasive surgeries to remove the tumor and radiation treatment with the maximum tolerated dose - all of which leads to a painfully low quality of life. Because of this, researchers are racing to find better therapies to stop or slow GBM. In the Jan. 1, 2006 issue of the journal Clinical Cancer Researc...

Markers of gene, protein, or micro-RNA activity predict outcome in prostate and colorectal cancers

..., men with indolent cancer may not need surgery or radiation at all," she said. "We know many men have a non-aggressive form of prostate cancer, but because we currently have no way to those patients, only very few are treated with a 'watchful waiting' approach instead of surgery or radiation," she said. The...

AIDS-related cognitive impairment exists in two separate forms

..., men with indolent cancer may not need surgery or radiation at all," she said. "We know many men have a non-aggressive form of prostate cancer, but because we currently have no way to those patients, only very few are treated with a 'watchful waiting' approach instead of surgery or radiation," she said. The...

Weighting cancer drugs to make them hit tumors harder

...es in the department of biomedical engineering and radiation oncology at Duke measured the tumor permeability, ...rst, DVM, Ph.D., a co-author of the paper who is a radiation biologist and director of the Duke Hyperthermia Program. Dewhirst's team has illuminated numerous me...

Scientists find Antarctic ozone hole to recover later than expected

...e it blocks 90-99 percent of the sun's ultraviolet radiation from making contact with Earth. This solar radiation can cause skin cancer, genetic damage, eye damage and can impact marine life. "My job is to track o...

New MRI technique shows emphysema in asymptomatic smokers

...ysema and its progression through time without the radiation exposure of lung CT tests," said Sean B. Fain, Ph.D., lead author and assistant professor of medical physics and radiology at the University of Wisconsin, Madison. Emphysema is a chronic, progressive lung disease, which permanently damages the air s...

New potential drug target in tuberculosis

...of the molecule. Using the high-energy synchrotron radiation beamlines at EMBL Hamburg, on the campus of the German Electron Synchrotron Radiation Facility (DESY), he created an atom-by-atom map of the protein's structure. A high-resolution picture of the active site of LipB bound to a lipid inhibitor helped t...

Polymers show promise for lab-on-a-chip technology

...ternal stimuli, such as temperature changes and UV radiation exposure, which could makes them easier to activate than silicon. And, perhaps most importantly of all, LCPs are less expensive than silicon and potentially easier to process, Elias said. "Ultimately, we believe liquid crystalline polymers will be ...

Atmospheric ozone recovering in mid-latitudes, report shows

...-- which protects Earth from the sun's ultraviolet radiation -- are showing signs of recovery in the most important regions of the stratosphere above the mid-latitudes in both the Northern and Southern hemispheres, a new study shows. Researchers attribute the improvement to both a reduction in ozone-depleting...

What's shaped like a pear and has 2 genomes? Check the pond

...verse sensory systems. It can protect itself from radiation and other threats and also can fight back against competitors and predators. In short, versatility is its strength. Now, we can understand how this versatility works." It takes plenty of genes. In fact, T. thermophila has roughly 25,000 genes--n...

Radioactive scorpion venom for fighting cancer

...aches to the glioma cells, then the I-131 releases radiation that kills the cell. This compound has enabled ...ase-II human trials, which involve higher doses of radiation than the earliest trials. "The health physicist has the duty to ensure to ensure that these thera...

Cycles of cell death, proliferation key to liver cancer

...e hope for treatment or cure through chemotherapy, radiation or other traditional cancer treatments. "We now understand development of liver cancer in mice. Since inflammation drives both damage and regeneration in liver tissue, it is the repeating cycle of damage, inflammation and regeneration that leads to...

Radiation-killed bacteria vaccine induces broad immune response in mice

...rs inactivated Listeria with lethal doses of gamma radiation and then vaccinated a group of 10 mice twice with the irradiated bacteria. Another group of 10 mice received two inoculations with heat-killed Listeria, while a third group of 10 received no vaccine. Twenty-eight days after the first vaccinations, al...

Radiation-armed robot rapidly destroys human lung tumors

Super-intense radiation delivered by a robotic arm eradicated lung tumors ... the largest US teams devoted to the CyberKnife, a radiation delivery system that uses an accurate, precise robotic arm to aim highly focused x-ray beams at the ...

New genetic test for breast cancer

...ard treatment is surgery to remove the tumor, plus radiation and hormonal therapy, which cures about 80 to 85 percent of patients. Adding chemotherapy can further reduce the risk of recurrence by about 25 percent, but it benefits only a small proportion of women. Currently, most women with early-stage breast...

Sandia work launched on space shuttle shows live cells influence growth of nanostructures

...homes for their occupants - even in the vacuum and radiation of outer space - than those created by more standa...gevity when exposed to the extreme stresses of the radiation and vacuum of outer space. Of the NASA mission, Brinker says, "Ordinarily, exposed to such extreme...

Tiny airborne particles are a major cause of climate change

...e increased cloud cover reflects more of the sun's radiation back into space, creating a local cooling effect o...ght; less reflection of sunlight and absorption of radiation lead to warming. Policy makers have argued that, in the bottom line, the warming effect of the gre...

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