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Tag: "increases" at biology news

Weight control protein may yield antiobesity drugs

...ced by fat that normally decreases food intake and increases energy expenditure. In many species, including humans, the hormone acts to stabilize weight and glucose balance through activating its receptors in the hypothalamus. Earlier work by Rui's group found that SH2-B binds to a second protein, JAK2, to pr...

Global warming increases oyster sensitivity to pollution

...st forever. Research has shown that global warming increases the sensitivity of oysters to metal pollution, causing a deadly threat to populations in polluted areas. Dr. Gisela Lannig from the University of North Carolina, USA, will present her work on cadmium poisoning in eastern oysters (Crassostrea virginic...

Methamphetamine Abuse, HIV Infection Cause Changes in Brain Structure

...rved that methamphetamine abuse is associated with increases in the volume of the brain’s parietal cortex (which helps people to understand and pay attention to what’s going on around them) and basal ganglia (linked to motor function and motivation). HIV infection is associated with prominent volume losses in ...

'Gadonanotubes' greatly outperform existing MRI contrast agents

... suspect the clustering is causing the unexplained increases in magnetic and MRI effects that they observed in tests at Rice, at the University of Houston's Texas Center for Superconductivity, and in the Swiss laboratories. More than 25 million patients in the U.S. undergo MRIs each year. Doctors use contrast...

Suppressing growth hormone in early adulthood may prevent cancer

...said IGF-1 is an important blood-borne factor that increases cell growth and prevents cell death and has been p...evels of growth hormone (a circulating factor that increases IGF-1 levels) exhibit an increase in spontaneous mammary tumors. Dwarf animals with 50 percent lower...

Errors in the measurement of global warming corrected

...to 4°C. However, year-to-year and region to region increases may vary considerably, with a smaller increase in the tropics but 10 degrees or more possible in some Polar Regions. "Unfortunately, the warming is in an accelerating trend -- the climate has not yet caught up with what we've already put into the at...

Molecular mechanism of feather formation found

...egulates its own expression and the activator also increases the activity of the inhibitor," Harris says. "The model is a simple way of explaining how feather patterning is achieved." Theoretical biologist Hans Meinhardt, also at the Max Plank Institute and a collaborator on the PNAS paper, posited the role o...

Enzyme affects hypertension by controlling salt levels in body

An enzyme known to cause hypertension increases blood pressure by activating tiny pores, or channe... studies to determine whether low potassium intake increases WNK1 activity, leading to hypertension. The WNK1 enzyme was first identified and cloned in 2000 by ...

Molecular trigger for Huntington's disease found

...e abnormal HD protein selectively binds to p53 and increases its level in cells. They noted that the brains of patients with HD also show substantial increases in the p53 protein, with the highest levels in cases with the most extensive pathology. The researc...

Lactose intolerance linked to ancestral environment

...intolerance decreases with increasing latitude and increases with rising temperature, and especially with the difficulty in maintaining dairy herds safely and economically. A major challenge in interpreting the data, Sherman noted, was to resolve the puzzle that about 13 lactose-tolerant populations live side...

Mosquitoes are more attracted to individuals infected with malaria

...ninfected people. The question of whether malaria increases your chances of being bitten by a mosquito has lon...WR, Gouagna LC, Koella JC (2005) Malaria infection increases attractiveness of humans to mosquitoes. PLoS Biol 3(9): e298. ...

Tropical Deforestation affects rainfall in the U.S. and around the globe

...to California during the winter season and further increases rainfall in the southern tip of the Arabian Peninsula. Improved understanding of tropical forested regions is valuable to scientists because of their strong influence on the global climate. The Amazon Basin literally drives weather systems around th...

Experimental shingles vaccine proves effective in nationwide study

...eople age, however, shingles-associated nerve pain increases in frequency and severity. This complication may occur in nearly one-third of persons with shingles who are 60 years of age or older. Patients with PHN often describe the pain as burning, throbbing, aching, stabbing or shooting, and it can cause bot...

Vaginal gel may provide a new approach to HIV prevention

...strual cycles and thin the vaginal membrane, which increases susceptibility to virus infection, Veazey says. During testing, researchers placed the experimental gels in the animals' vaginas. Thirty minutes later, the animals were exposed to high-dose SHIV. The three inhibitors were each effective when used al...

Discovery that bacterium is phosphate gourmet key clue to what makes it most social of bacteria

...own as "two component switches" which dramatically increases the level of complexity of information that can be processed by the bacterium. Dr Whitworth focussed on three previously described signalling pathways that were known to be similar to phosphate utilisation pathways (all organisms needs to consume pho...

'License to kill' enables powerful immune attack cells in mice

...elp us match bone marrow transplants in a way that increases the immune system's ability to fight off a relapse of the leukemia." ...

Bacteria in Household Dust May Trigger Asthma Symptoms

...e paper. "This suggests that exposure to endotoxin increases asthma risk even in non-allergic individuals." Since the mid 1960s, researchers knew that house dust contains endotoxin, but it is only within the last five years that they began to understand the impact of household endotoxin on human health. Knowi...

Prenatal exposure to famine increases risk of schizophrenia

...supports the view that prenatal exposure to famine increases the risk of schizophrenia in later life. Using a much larger sample size with clear evidence of exposure, our findings are internally consistent and almost exactly replicate the Dutch findings. Since the two populations are ethnically and culturally ...

Researchers use brain scans to predict behavior

...teers with functional brain imaging, which reveals increases in blood flow to different brain areas indicative of increased activity in those regions. Based on brain activity patterns that reflected whether the subjects used the hint or not, scientists found they could frequently predict whether a volunteer's ...

Agricultural workers at increased risk for infection with animal flu viruses

...t that occupational exposure to pigs significantly increases the risk of developing swine influenza infection. Agricultural workers should, therefore, be considered in developing flu pandemic surveillance plans and antiviral and immunization strategies, according to the study's co-investigator, Gregory C. Gray...

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