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Tag: "influenced" at biology news

'Smart' genetic therapy helps the body to heal itself

...prevent the diseases. The severity of the SMA is influenced by the number of SMN2 genes, which normally vary between one and four ?the more copies there are the better the patient does. Professor Wirth's team identified a drug ?valproate, used successfully in epilepsy treatment for decades ?that is able to i...

A new view on Lyme disease: Rodents hold the key to annual risk

...n exposure. While none of the climate variables influenced nymphal infection prevalence, higher temperatures in the previous year and precipitation patterns in the current year had weak, though unexpected, effects on total density and density of infected nymphs. It's thought that higher temperatures keep tic...

UCLA study finds same genes act differently in males and females

...ion levels between the sexes. Gender consistently influenced the expression levels of thousands of genes in the liver, fat and muscle tissue. This effect was slightly more limited in the brain, where hundreds, not thousands, of genes showed different expression patterns. "Males and females share the same gen...

Prozac's target revealed

...ssess how neurogenesis in the adult brain might be influenced by long-term, Mission-to-Mars levels of exposure to a particular kind of damaging radiation that's prevalent in space. ...

Polynesia explorers created worldwide web of scientific knowledge

...o jive with their sponsors' instructions, how they influenced discourse at home and fought their fiercest enemy ?not mosquitoes, but swarms of missionaries who invaded their turf and challenged their findings. Liebersohn's study is the first to put the travelers at the center of the "networks of knowledge" sto...

Time of day tempers tadpoles' response to predators

...ication of my results is that prey behavior can be influenced by both external factors---the chemical cues released by the predators---and internal factors such as circadian rhythms. This is important for understanding the mechanisms of prey behavior, which need to be identified in order to make long-term predi...

Light guides flight of migratory birds

...tant site. It turned out, however, that the panels influenced the distribution of polarized light patterns at sunset and sunrise, and it was the altered polarization patterns, rather than olfactory cues, that produced the directional biases. Moreover, the effect appeared to result from recalibration of the sun ...

Scientists discover a genetic code for organizing DNA within the nucleus

...into chromosomes. Such mutational processes may be influenced by the relative accessibility of the DNA to various proteins and by the organization of the DNA in the cell nucleus. Therefore, the scientists believe that the nucleosome positioning code they discovered may aid scientists in the future in understand...

How ancient whales lost their legs, got sleek and conquered the oceans

... result of slowly accumulated genetic changes that influenced the size of the limbs and that these changes happened sometime late in development, during the fetal period. However, the actual loss of the hind limb occurred much further along in the evolutionary process, when a drastic change occurred to inactiv...

How can identical twins be genetically different?

...e before. They also found that non-genetic factors influenced the expression of these genes and that the expression patterns varied between identical twins where only one twin had RA. Results of the U-M study were published in the July issue of Arthritis and Rheumatism. RA is a chronic inflammatory disease th...

Study finds 60 new genes controlled by DNA snippet

...man DNA code to reveal for the first time 60 genes influenced by one such sequence, according to an article published today in the journal Genome Research. Growing knowledge of how regulatory sequences control gene behavior has the potential to create new classes of treatment for nerve disorders and heart fail...

DNA end caps may lead to cancer treatments, UT Southwestern researchers report

...researchers believe that the rate of shortening is influenced by the length of the overhang ?more DNA is lost from ends that have longer overhangs. Telomerase also changed the relative size of the two tails. "We need to understand how this size is regulated, since we would like to be able to manipulate it for...

HIV decline in Zimbabwe linked to behavioural change

...n't say for certain, fear of HIV and AIDS may have influenced this change in behaviour, with Zimbabwe's well educated population, good communications, and health service infrastructure, all combining to create this effect." The researchers from Imperial College London and the Biomedical Research and Training I...

History of human cannibalism eats away at researchers

...to evaluate selective forces that have potentially influenced these patterns. "In contrast to the previous study, which concluded that variation in the PRNP gene was strongly skewed toward intermediate frequency variants, our results showed that there was, in fact, a deficit of intermediate frequency variant...

Variation in bitter-taste receptor gene increases risk for alcoholism

...eral papers suggesting drinking behaviors might be influenced by variations within taste receptors. So we decided to look closely at these taste receptor genes." Because taste receptors tend to vary a lot in the general population, Goate and colleagues had the opportunity to look at a large number of differenc...

First demonstration of 'teaching' in non-human animals

...rather than the constraint of brain size, that has influenced the evolution of teaching. The research, by Professor Nigel Franks and Tom Richardson from Bristol University, is reported today in Nature [12 January 2006]. According to the accepted definition of teaching in animal behaviour, an individual is a...

Two NIH initiatives launch intensive efforts to find roots of common diseases

...ammation and oxidative stress that are known to be influenced by environmental toxins. The National Center for Biotechnology Information, a part of the National Library of Medicine at NIH, will develop databases to manage the vast amount of genetic, medical and environmental information that will emerge from ...

For some young fish, early gene expression is a clear harbinger of fated lifestyle

...ial versus migratory "life history" is known to be influenced by environmental factors, but is not well understood at the genetic level. Researchers now report that fish that are very closely related genetically show dramatically different patterns of actual gene expression if they have adopted different lifest...

Attractive birds more immune against bird flu

...ffer in appearance and why the choice of a mate is influenced by behaviour and appearance features that cannot reasonably be thought to have any usefulness. Therefore, they have begun to look more and more at the genetics behind what are called secondary sexual characters, such as the tail of a peacock, the str...

Stanford study of owls finds link in brain between sight and sound

...in the brain that process auditory information are influenced powerfully by the circuits that control where the animal is looking-the animal's direction of gaze. "The ability to hear and the direction of gaze aren't necessarily linked," said the paper's first author, postdoctoral scholar Daniel Winkowski, PhD....

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