Gene plays major role in formation of stem cells and cancer
...ure . Because cancer cells and stem cells can both reproduce themselves in unlimited numbers, it was suspected that they have something in common. That suspicion proved to be correct. Together with their Swiss colleagues, researchers from the Netherlands Cancer Institute discovered an important common link: th...Scientists question reports of massive ant supercolonies in California and Europe
...of the world, she says, and understanding how they reproduce and colonize is essential if scientists hope to develop realistic strategies that will keep their populations in check. "Our data show that it's not the case that the whole California coastline is one genetically homogenous supercolony," says Gord......eafs probably have a better chance of surviving to reproduce than do Fremont cottonwoods. The beavers not only prefer Fremont trees, but as researchers discovered, they also eat less narrowleaf if that is the only variety in their territory. The group took another look at the chemicals in the branches cho...Laboratory rat gene sequencing completed
...actors, an obvious one being generation time they reproduce faster than humans. The results of the analysis show that the rat has mutated slightly more frequently than the mouse from the last common ancestor."It's not clear how to explain that because they both have the same generation time," Brent said. R...K-State uses geographic tools to track plant pathogens
...hells. "When you're talking about insects that reproduce asexually and sexually, one or two females is all you'd need," he said. ...Ribozyme package effective against hepatitis B virus
... childbirth. Once infected, the virus continues to reproduce in the liver. Clawson, who is also director of the Jake Gittlen Cancer Research Center at Penn State Milton S. Hershey Medical Center, and his team developed the SNIPAA cassette, which contains a double-dose of a special type of ribozyme called a tr...Scientists discover why not enough choline results in fewer brain cells, poorer memory
...ses stem cells -- the parents of brain cells -- to reproduce more than they would if insufficient choline were available. A report on the findings will appear in the April issue of the Journal of Neurochemistry. Authors are doctoral student Mihai D. Niculescu and Dr. Steven H. Zeisel, professor and chair of nu...Undisturbed Amazonian forests are changing, say scientists
...forest, and are the only trees that can flower and reproduce in deep shade." The most likely reason for these changes, say the researchers, is that rising carbon-dioxide levels are fertilizing the forests, leading to faster growth and more competition among trees for light, water, and soil nutrients. Under th...Should publicly funded research be free and available to the public?
... Internet access, as well as written permission to reproduce any online content. Is "open access" science publishing the wave of the future, or will subscription-based research journals remain the dominant source for peer-reviewed science? In the following essays, two Stanford University scientists at the cent...Mix of chemicals plus stress damages brain, liver in animals and likely in humans
...nmental Health. Abou Donia's study was designed to reproduce the symptoms of Gulf War Syndrome, a disorder marked by chronic fatigue, muscle and joint pain, tremors, headaches, difficulties concentrating and learning, loss of memory, irritability and reproductive problems. The Gulf War Syndrome symptoms have b...Purdue scientists: Genetically modified fish could damage ecology
..., a small fish that breeds daily, because it would reproduce often enough for trends to emerge relatively quickly. "We took several tanks and put a female into each one with two males - one natural, and one transgenic," Howard said. "The transgenic males were 83 percent heavier than the natural-bred males, so ...Mount Sinai School of Medicine conducting clinical trials with gene therapy for colorectal cancer
... to produce an engineered virus so that it can not reproduce itself and can not lead to a sustained infection in patients. In animal experiments we have found that this maximizes both efficacy and safety and we hope to see the same in humans." The first organ to which colon cancer spreads is the liver and prog...MBL scientists confirm evolutionary exception
...dead end. While almost all multicellular organisms reproduce sexually, this form of reproduction is much less e...oduction, eliminate the possibility that bdelloids reproduce sexually and thus confirm that the organism has evolved without sexual reproduction or genetic excha...Ancient DNA mutations permitted humans to adapt to colder climates, UCI researchers find
...it possible for individuals to survive the winter, reproduce and colonize the higher latitudes. "This explains the striking correlation between mtDNA lineage and geographic location that we still see today in indigenous populations around the world." It also explains why people with a certain ancestral histor...Researchers seek to clone 'mad cow disease' resistant cattle strain
... or fungi, explains Eyestone. Those microorganisms reproduce themselves to cause disease in fairly conventional ways, either inside a cell or elsewhere in the body. But prions behave very differently than these more common disease-causing organisms, explains Eyestone. Prions are actually a form of protein tha......ry songbirds significantly affect their ability to reproduce when they return north in the spring and the evidence is found in tiny drops of their blood. The study, highlighted recently in the journal Science, and co-authored by Dr. Peter Marra of the Smithsonian Institute, appears on-line in the current Proc...Researchers probe how microbes speed up acid production at mining sites
...d. The researchers will continue to experimentally reproduce and study the complex natural system of microbes and minerals, starting with simple systems and building complexity by sequentially adding more and different microorganisms. The results may provide insight into other problems, such as tooth decay and...Plant sex protein identified at UC Riverside
...on. "The importance of understanding how plants reproduce is enormous for the future manipulation of crop and nursery plants," said Lord. "There is a huge flower industry in California, and we know little about how seed set occurs in most flowering plants." Lilies are good examples because they cannot prod...Smallpox in Europe selected for genetic mutation that confers resistance to HIV infection
... CCR5 receptor in infection. The bacteria actually reproduce outside immune cells. Smallpox, on the other hand, is a virus based on RNA, just like HIV, she said. And there is some evidence that smallpox, Variola major, uses chemokine receptors like CCR5 to enter cells. The researchers said the geographic distr......hould rapidly replace sexual ones because they can reproduce twice as fast. So why is there sex in the world, and why is there sex in this species in particular? "That's the point of the paper," says Elizabeth B. Goodwin, a UW-Madison professor of genetics and the senior author of the Science article, " and ...