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Tag: "internal" at biology news

New angiogenesis finding may help fight cancer growth

...de of blood vessels. Endothelial cells form the internal structure of a blood vessel, and during angiogenesis, they migrate, starting an extension of the blood-vessel network. When Paul added NK-B to endothelial cells, "They lost the capacity to organize in three dimensions, to form the tubes that are the ...

New treatment for severe malaria

...hdrawn when it was shown that the substance caused internal bleeding. The new substance is a development of heparin, and has the important difference of having no effect on normal blood coagulation. ...

'Cellular antennae' on algae give clues to how human cells receive signals

... UT Southwestern Medical Center have found that an internal structure that helps build cilia is also responsib...so called flagella ?are built and maintained by an internal bidirectional, escalator-like system that ferries molecules to and from the tips by a process called...

New study reveals structure of E. coli multidrug transporter protein

...published last year in the journal Science. This internal cavity is the "most notable difference" between Em...d" compounds. The hydrophobic residues in the EmrD internal cavity are likely to contribute to the general mechanism transporting various compounds through the ...

Just like us, social stress prompts hamsters to overeat, gain weight

...t is particularly unhealthy because it affects the internal organs and is associated with diabetes, cancer and other serious illnesses, Bartness said. Bartness' team began a second study to determine whether other stressors, such as a mild foot shock, produce the same effect as the social defeat model; and w...

No cell walls, no new cancer cells

...ht moment to protect and allow the construction of internal components. A team from the Uppsala Branch of the global Ludwig Institute for Cancer Research (LICR) has not only shown how the cell gets this timing right, but has also conducted proof-of-principle studies that indicate taking away the cell's bricks...

Coming soon: 3-D imaging that flies 'through' and 'around' cancer

...onal fusion provides unique views of the body that internal organs typically impede," said Quon. "Our new imag...cells. The CT scan generates a detailed picture of internal anatomy, locating and revealing the size and shape of abnormal cancer growths. When these two result...

Time of day tempers tadpoles' response to predators

...University of Michigan graduate student shows that internal factors, such as biorhythms, temper their response...-the chemical cues released by the predators---and internal factors such as circadian rhythms. This is important for understanding the mechanisms of prey behavi...

New GI technologies improve internal organ visualization

...the most of the opportunity to access new areas of internal organs that have not previously been examined without open surgery. In a group of studies presented today during Digestive Disease Week® 2006 (DDW), endoscopic procedures are demonstrating significant improvements in the quality and delivery of eval...

Internal body clock dictates timing of different types of stroke

The internal body clock, or circadian rhythm, seems to influence the timing of different types of stroke, suggests research published ahead of print in the Journal of Neurology Neurosurgery and Psychiatry. The research team analysed data from almost 13,000 pati...

Mouse mimics chronic leukemia, will aid drug development

... principal investigator John C. Byrd, professor of internal medicine. Byrd is a specialist in CLL at the Ohio State University Comprehensive Cancer Center ?Arthur G. James Cancer Hospital and Richard J. Solove Research Institute (OSUCCC-James). "The strain should be extremely valuable for the developmen...

Adult stem cells are touchy-feely, need environmental clues

...ell needs to move its cellular muscles triggers an internal chemical signal that, in turn, directs the cell to differentiate. "The cytoskeleton uses motors that, like our muscles, are based on the mechanical tension created by molecules of actin and myosin," Engler said. "When we deprive these stem cells o...

How plants avoid feeling the burn

..."lobster tans," plants have developed an intricate internal defense mechanism, called photoprotection, which acts like sunscreen to ward off the sun's harmful rays. "We knew that biomolecules called carotenoids participate in this process of photoprotection, but the question has been, how does this work?" sa...

How can identical twins be genetically different?

... Joseph Holoshitz, M.D., an associate professor of internal medicine at U-M Medical School and co-author of the study. The advantage of studying twins is that they start out with the exact same genetic information. Therefore, differences in gene expression are attributable to different environmental factors...

New fruit fly protein illuminates circadian response to light

...r to understanding the process by which the body's internal clock synchronizes to light. Understanding how lig... The body's 24-hour clock controls a multitude of internal functions such as periods of sleep and wakefulness, body temperature, and metabolism. Although circa...

Proteins spur diabetic mice models to grow blood vessels, nerves

..., Ph.D., a cardiologist and associate professor of internal medicine at the University's School of Medicine, is the study's corresponding author. "We now have a (growth) factor that attracts both blood vessels and nerves--that's why it's unique for diabetes," Li said. "This demonstrates that netrins are crit...

Imaging study links key genetic risk for Alzheimer's disease to myelin breakdown

...f myelin, the fatty insulation coating the brain's internal wiring, correlates strongly with the presence of a key genetic risk factor for Alzheimer disease. The findings are detailed in the January edition of the peer-reviewed journal Archives of General Psychiatry and add to a growing body of evidence that...

Possible brain hormone may unlock mystery of hibernation

...hipmunks is strictly controlled by an individual's internal circannual rhythm even under conditions of constant cold. In 20 hibernators examined throughout their lives, concentrations of HPc in the blood started to decrease prior to hibernation and remained low throughout the inactive state. Hibernation ended...

New 'self-exploding' microcapsules could take sting out of drug delivery

...another external trigger, the new system relies on internal mechanisms to do the same job. Each of the new microparticles features a biodegradable gel core that is surrounded by a lipid membrane. As the gel biodegrades, pressure builds up in the membrane. Eventually the microcapsule ruptures, releasing the me...

More evidence mammals, fruit flies share make-up on function of biological clocks

...netic makeup that determines the function of their internal biological clocks. The research team consisted of post-doctoral researcher Ben Collins, Esteban Mazzoni, a graduate student, and Assistant Professor Justin Blau of NYU's Department of Biology and Professor Ralf Stanewsky of the University of London....

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