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Tag: "team" at biology news

Beyond the DNA: Chemical signatures reveal genetic switches in the genome

...re' gene products are expressed. However, the LICR team and collaborators have developed a novel method to identify and predict the 'promoter' and 'enhancer' regions that switch on transcription, the first step in gene expression. This study is an important step towards large-scale functional annotation o...

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

...rface of malignant cells. Three days later, the team applied an alternating magnetic field to the tumor region, causing the magnetic nanospheres latched onto the tumor cells to change polarity thousands of times per second, instantaneously generating heat. As soon as the AMF stopped, the bioprobes cool...

In obesity, brain becomes 'unaware' of fat

...stems of mice and humans differ substantially. His team has plans to examine these effects in overweight primates, whose digestive systems have much more in common with people. The findings do “strongly support the case?that leptin resistance in critical brain regions is a cause of obesity induced by d...

Study shows isolation of stem cells may lead to a treatment for hearing loss

...amaged hair cells and restore normal hearing. The team has already begun animal studies to explore the use of cochlear stem cells in well-established hair cell ablation models and in deaf mouse mutants with predictable patterns of early hair cell loss. This line of research will evaluate the in vivo sur...

Male-killing bacteria makes female butterflies more promiscuous

...ncreases female promiscuity and male fatigue. The team found that when the male insect population drops -- killed off by the bacteria -- the female butterfly becomes more sexually rampant. Males on the other hand show signs of fatigue and put less effort into mating. In some populations of tropical b...

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

A team of UCSB researchers, in collaboration with colleagues from UC Berkeley and StrataGent Life Sciences, of Los Gatos, California, has designed a novel pulsed microjet system engineered to deliver protein drugs into the skin without the pain or bruising ...

Changes in amino acids in the 1918 influenza virus cut transmission

...illness." To do this, Dr. García-Sastre and his team studied two key molecular structures: hemagglutinin, a protein located in of the surface of the influenza virus, and sialic acid, a cellular molecule that is recognized by hemaglutinins of both human and avian strains of influenza virus. These molec...

Fascinating spider silk

... spiders' secrets and imitating their technique. A team lead by Thomas Scheibel at the Technical Universit...nger is made of two different proteins. The Munich team has now successfully used genetic engineering to produce one of the spider silk proteins of the Euro...

Study finds antibiotic resistance in poultry even when antibiotics were not used

A surprising finding by a team of University of Georgia scientists suggests that ...e to put in some work before that." Lee and her team sampled droppings from more than 140,000 birds under four different conditions: 1.) commercial flock...

Gene found for rare disorder may reveal new pathway in mental retardation

... mental retardation and autism. An international team of researchers identified two genes that contribut...exel University College of Medicine, led the study team that announced the discovery of NIPBL, the first gene known to cause CdLS, in 2004. The current s...

Action video games sharpen vision 20 percent

...me's need to identify objects very quickly. The team is now delving into how the brain responds to other visual stimuli. They plan to use what would be a video gamer's dream: a new 360-degree virtual-reality computer lab now being completed at the University of Rochester....

Researchers identify gene involved in dog size

An international team led by researchers from the National Human Genome ...tion to Ostrander and her colleagues at NHGRI, the team included researchers from Cornell University in Ithaca, N.Y.; the University of Utah in Salt Lake Ci...

Navigable nanotransport

...strate the power of their new concept, Kim and his team chose rigid, disk-shaped monomers equipped with a ring of special molecular "hooks" that can be activated by UV light. When a solution containing these disks is irradiated, the hooks grab on to each other, linking the disks into little, two-dimension...

Major gene study uncovers secrets of leukemia

... cells the body needs to survive. The St. Jude team used microarrays, postage-stamp-sized chips that contain DNA fragments, which allowed researchers to investigate more than 350,000 markers called single nucleotide polymorphisms. Single nucleotide polymorphisms are individual variations in the DNA th...

Penn researchers show how nanocylinders deliver medicine better than nanospheres

...herical particles." In this study, the research team used skinny cylindrical nanoparticles composed of ...ay in circulation for a few hours. The research team used nanoparticles that contained one water-loving chain of a common polymer called polyethyleneglyc...

Need oxygen? Cells know how to spend and save

...production at normal oxygen levels. Semenza's team noticed that one particular component of the COX p...ers refer to as hypoxia. To test the idea, the team compared the growth of human cells in normal oxygen conditions (what's generally present in normal r...

The sturdier sex? -- Study by Pittsburgh scientists finds female stem cells work better

...strophin to muscles. In this study, Dr. Huard’s team injected female and male muscle-derived stem cells into dystrophic mice and then measured the cells?ability to regenerate dystrophin-expressing muscle fibers. They then calculated the regeneration index (RI) ?the ratio of dystrophin-positive fiber...

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

...ncreasing the risk for relapse. Heilig and his team showed that MTIP blocked the activity of CRF in stressful situations without affecting its activity under ordinary circumstances. They studied rats that had been put through several cycles of heavy alcohol consumption and withdrawal to create depende...

Cambodian vulture nests offer hope for species

...tes. It's a very special place." Chansocheat's team immediately set-up 24-hour protection measures against poaching and egg collecting, and are now working with local communities to ensure that they are involved in—and support—longer-term conservation measures. "We already have a successful WCS model ...

Nanotextured implant materials: blending in, not fighting back

...h with Purdue graduate student Derick Miller, the team molded pieces of PLGA, a biodegradable polymer often used for blood vessel grafts, so they came out completely covered with bumps that were 100, 200 or 500 nanometers in diameter. The surface with 200-nanometer features strongly favored the adsorptio...

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