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Tag: "tell" at biology news

Researchers identify genes in fruitflies that may shed light on human cancer spread

...eriment," says Montell. "The results of this study tell us where to focus future efforts." Understanding the genetic mechanisms underlying cell migration is critical for understanding normal development, and inflammation, as well as metastasis. Classical genetic approaches for identifying key genes ?muta...

APS lecturer shows rare video of 'teacher-student' immune cell interactions in live animal

...n entering the body," von Andrian explained. "They tell the T cells what to do, how to respond. We have known about some aspects of this process from tissue culture studies, but this has never been observed before in vivo. That has largely been a black box," he said. His group has explored the first days...

Tetracycline plus teeth equal gray smile

...e drug and had the same stains. Often dentists can tell if a child had a high fever, just by looking at the stain pattern on their patient's teeth. In the 1950s, tetracycline stains reached widespread levels because so many doctors prescribed this drug. Since the stain is embedded deep into the tooth, ...

New McGill research shows mice capable of empathy

...e findings are not only unprecedented in what they tell us about animals, they may ultimately be relevant to understanding pain in humans. "Since we know that social interaction plays an important role in chronic pain behaviour in humans," Dr. Mogil said, "then the mechanism underlying such effects can no...

Scientist-astronaut sends T-cells into space

...f California, San Francisco. "This experiment will tell us for the first time exactly which genes involved in the normal immune response aren't activated in space." T-cells are white blood cells that play a central role in the body's immune response. They are a target of human immunodeficiency virus (HI...

Iron critical to ocean productivity, carbon uptake

... "The new fluorescence technology now allows us to tell which combination of nutrients is stressing the ph...ust deposited in the ocean, but it is too early to tell if there is an impact of recent climate change on iron-stressed populations because the satellite da...

Marine 'dead zone' off Oregon is spreading

...Sanctuary. Researchers say that it's difficult to tell what long-term ecological impacts these dead zone events may have on marine ecosystems. "Many marine species live in fairly specialized ecological niches and any time you change the fundamental physics, chemistry and nature of the system, it's a ser...

Mushrooms as good an antioxidant source as more colorful veggies

...tes and DNA. She adds, "The ORAC assay does not tell what happens in the human body but this assay is currently under investigation as to how it can predict physiological activity." The Penn State study showed that the anti-oxidant effect of mushrooms is due primarily to the presence of polyphenols. D...

How can identical twins be genetically different?

...at together, and most people find it impossible to tell them apart. Identical twins who grow up together share just about everything, including their genes. But sometimes only one twin will have health problems when genetics predicts both of them should. Scientists at the University of Michigan Medical ...

Parkinson's disease mechanism discovered

...he said. "These findings are exciting because they tell us we have a platform for discovering new therapeutic strategies and for speeding the process of discovering treatments for these disorders." Current treatments for Parkinson's disease do not aim at protecting the dopamine-producing neurons themselv...

Wild bees and the flowers they pollinate are disappearing together

... strong to be a coincidence." The research can't tell us whether the bee declines are causing the plant declines, or vice versa, or indeed whether the two are locked in a vicious cycle in which each is affecting the other. It's also not clear as of yet what the ultimate causes of the declines are, alth...

How HIV 'exhausts' killer T cells

...the possibility that adding PD-1 measurement might tell us more about the likelihood of progression of the disease and need for treatment in infected people," he said. Walker said that scientists know little about the evolutionary purpose of a pathway that would deactivate such an important componen...

A new tool against brain disease

...the possibility that adding PD-1 measurement might tell us more about the likelihood of progression of the disease and need for treatment in infected people," he said. Walker said that scientists know little about the evolutionary purpose of a pathway that would deactivate such an important componen...

Nicotine exposure during development leads to hearing problems

...that is presented verbally, and may not be able to tell the difference between similar sounds. "This study is significant because it suggests to us precisely what aspect of smoking is so harmful in pregnancy when it comes to cognitive hearing deficits," Metherate said. "Most women who smoke find it diff...

Breaks in hibernation help fight bugs

...tem that is essentially asleep. "Animals cannot tell when they need to wake up, or if they are infected," says Luis. If the animals hibernate for long they risk serious infection, she says, while waking up frequently wastes precious energy, and could prove fatal as well. In other words, animals wi...

Researchers link two more genes to sudden infant death syndrome

... provide them with a cause and would often have to tell them, 'We have no idea why your apparently healthy infant did not wake up this morning,' " Dr. Ackerman says. "Although so much of SIDS remains unexplained, these findings that point to the heart for 10 percent to 15 percent of SIDS provide one place...

Bacteria can help predict ocean change

...e can show where and when it was taken. "I could tell you what month it is if you just got me a sample of water from out there," Fuhrman said. The researchers took monthly bacteria samples for more than four years in the Pacific Ocean near the USC Wrigley Institute's marine laboratory on Catalina Isla...

Basic work on E. coli identifies two new keys to regulation of bacterial gene expression

...s are specific sequences within the DNA chain that tell RNA polymerase when and where to begin transcription, and how much product to make from specific genes. Gourse's group found that there is a specific region within DNA promoters that makes contact with a highly conserved but previously underappreci...

Flick of whiskers helps tease out brain's 'shadow' signaling system

...fluence over them. Perhaps the astrocytes at times tell the neurons what to do." ...

Natural vitamin E tocotrienol reaches blood at protective levels

...udies are encouraging, but it is still too soon to tell for humans. More mechanistic and outcomes studies are warranted." In the first study, collaborating scientists at Wayne State University fed participants 400 milligrams of a time-release formulation of a supplement containing primarily TCT. Resear...

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