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Tag: "increase" at biology news

Linheng Li Lab documents the development of cancer stem cells

...PTEN in stromal cells can lead to changes that may increase the number of stem cells and change their position or location," said Dr. Li. "These changes result in crypt fission and budding and can lead to intestinal polyposis and uncontrolled tumor growth." "All of us were very excited to be part of these ...

Reminding doctors which antibiotics to prescribe cuts C. difficile infection rates

...other hospitals in an attempt to reverse the rapid increase in CDI in the NHS. This finding is especially important because CDI rates are rising rapidly in the UK and a new more virulent strain has recently been identified2 A 2005 study by the Healthcare Commission3 found that 38% of NHS Trusts did not rest...

Circumcision: A proven strategy to prevent HIV

...find that the circumcised men in our study did not increase their risk behaviors after circumcision. In fact, all men in the trial increased their condom use and reduced their number of sexual partners." The authors conclude that circumcision will be most effective if it is integrated with other prevention...

Blocking immune cell action increases Alzheimer's-associated protein deposits

...his study's results suggest that such agents could increase the risk of Alzheimer's in some individuals. Luster is a professor of Medicine at Harvard Medical School, where El Khoury is an assistant professor of Medicine. ...

How T lymphocytes attack

...ely. Deciphering the strategies it implements may increase the immune system's effect on tumour cells and thus improve the clinical perspectives for anticancer immune therapy. At the Institut Curie, INSERM and CNRS researchers have used two-photon microscopy to demonstrate, for the first time in vivo and re...

Satellites shed light on global warming

... and has a major influence on climate. Because any increase in the melt rate of ice sheets and glaciers has the potential to greatly increase sea level, researchers are looking to the cryosphere to get a better idea of the likely scale of the...

The influence of the menstrual cycle on the female brain

... between 36 and 48 hours after the LH peak. An increase in brain activity with anticipation of uncertain m...eriod of ovulation. It could be envisaged that the increase in activity of certain regions of the female brain during the follicular phase would modulate behavi...

With cellulosic ethanol, there is no food vs. fuel debate according to MSU scientist

...aterials grown for their energy content ?also will increase dramatically. "This will reduce pressure on our land resources," said Dale, who also is associate director of the MSU Office of Biobased Technologies. "We'll be able to get more raw material out of one acre of land." Dale said that many of thes...

Many couples choose to donate surplus embryos for stem cell research

...embryos. "Among the couples who did not want to increase their family, 90% support the donation of embryos to stem cell research in a Catholic country—and, most importantly, almost no couple wants just to destroy the embryos," Menendez said....

Common parasitic infection leads to increased risk for HIV infection

...fection with T. vaginalis is common, even a modest increase in vulnerability to HIV acquisition as a result co...ion overall. According to McClelland, "the modest increase in risk makes it important that studies are either very large or of long duration in order to demons...

Nanoparticles for delivery of prostate cancer treatment

...ext decade, the number of new cases is expected to increase to more than 300,000 annually. The molecule that Garen and Hu constructed, called an Icon, recognizes the receptor tissue factor (TF) found on cells lining the inner surface of blood vessels in tumors but not in normal tissues. The Icon binds to ...

Syphilis rate on rise in US gay, bisexual men

... the next thing you know, you start seeing a large increase among another group." It is still easy to cure syphilis, but it can cause serious medical problems, including death if untreated. In addition, officials worry that gay men will get syphilis and become more susceptible to HIV infection, although st...

US conservation efforts bring more marine turtles to UK

...May 2007), analyses 100 years of data. It shows an increase in the number of loggerhead and Kemp’s ridley turt...s to protect eggs. Matthew Witt concludes: ‘The increase of turtles in the sea around the UK could be indicative of a global trend. We need more research to ...

Dinosaur extinction didn't cause the rise of present-day mammals, claim researchers

... now, began to radiate around the time of a sudden increase in the temperature of the planet ?ten million years after the death of the dinosaurs. Professor Andy Purvis from Imperial College London's Division of Biology explains: "Our research has shown that for the first 10 or 15 million years after the d...

Widely used iron nanoparticles exhibit toxic effects on neuronal cells

...l in response to growth factor addition. A 10-fold increase in the concentration of nanoparticles led to the production of two neurites per cell, and a 10-fold increase of that concentration resulted in only one neurite per cell. Additionally, neurites produced in resp...

Virtual duck bills demonstrate species coexistence

...rticle sizes that contain too much detritus, ducks increase their foraging efficiency." However Gurd found that avoiding detritus reduces the rate at which ducks can filter water. "It is this trade-off between avoiding detritus and foraging rate that allows ducks to partition resources" said Gurd. "Ducks wi...

Does a peptide affect the heart's response to social isolation?

...tions, such as loneliness or social isolation, may increase the risk of developing depression and anxiety as w... the animals exposed to isolation had an increase in heart rate and a reduction in heart rate variability. The administration of oxytocin significantl...

Genes and genius: Researchers confirm association between gene and intelligence

...ene and noted that the variation was related to an increase in IQ. A more recent Dutch study looked at three regions of DNA along the gene and also noticed influences on intelligence. In this new study, however, researchers tested multiple genetic markers throughout the gene. "If we look at a single marke...

Researcher examines polymers created with poultry feathers

...for more than 70 years. However the recent push to increase energy production from these feedstocks has increased the value of these agricultural commodities, making products made from them more expensive. Barone has turned his focus to the agricultural waste stream and is concentrating on developing ways ...

Vitamin D deficiency widespread during pregnancy

...ages, differing vitamin formulations or a moderate increase in sunlight exposure might be necessary to boost vitamin D stores to healthier levels. "In both groups, vitamin D concentrations were highest in summer and lowest in winter and spring," said senior author James M. Roberts, M.D., MWRI director and ...

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