Tumor microenvironment allows cancer cells to hide from the immune system

India experienced a demographic transformation several thousand years ago, from a region in which mixture between highly different populations was common to one in which mixture even between closely related groups became rare. The finding, which will be published online on August 8, 2013 in the American Journal of Human Genetics, published by Cell Press, provides new information about the peopling of India and improves our understanding of the changes that led to the present-day structure of Indian populations. "Prior to the population mixture and as recently as a few ...

IDAHO FALLS — Modernizing nuclear power plants to help extend their operating lifetimes is no small task. But the endeavor offers an opportunity to improve control-room design and layout. The Department of Energy's new Human System Simulation Laboratory (HSSL) at Idaho National Laboratory is a full-scale virtual nuclear control room that can test the safety and reliability of proposed technology replacements before they are implemented in commercial nuclear control rooms. The facility is now helping Duke Energy embark on an upgrade project for several of its nuclear ...

Scientists from Harvard Medical School and the CSIR-Centre for Cellular and Molecular Biology in Hyderabad, India, provide evidence that modern-day India is the result of recent population mixture among divergent demographic groups. The findings, published August 8 in the American Journal of Human Genetics, describe how India transformed from a country where mixture between different populations was rampant to one where endogamy—that is, marrying within the local community and a key attribute of the caste system—became the norm. "Only a few thousand years ago, the ...

KANSAS CITY, MO—A little-studied factor known as the Little Elongation Complex (LEC) plays a critical and previously unknown role in the transcription of small nuclear RNAs (snRNA), according to a new study led by scientists at the Stowers Institute for Medical Research and published in the Aug. 22, 2013, issue of the journal Molecular Cell. "We have found that LEC not only has a role in this process—it is like the "Swiss Army knife" of snRNA transcription," says Stowers Investigator Ali Shilatifard, senior author of the study. "LEC does it all." The findings shed new ...

LA JOLLA, Calif., August 8, 2013 — Scientists at Sanford-Burnham Medical Research Institute have identified a key factor that regulates the autophagy process, a kind of cleansing mechanism for cells in which waste material and cellular debris is gobbled up to protect cells from damage, and in turn, modulates aging. The findings, published in Nature Communications today, could lead to the development of new therapies for age-related disorders that are characterized by a breakdown in this process. Malene Hansen, Ph.D., associate professor in Sanford-Burnham's Del E. Webb ...

Hidden in the tangled, repetitious folds of DNA structures called centromeres, researchers from Harvard Medical School and the Broad Institute have discovered the hiding place of 20 million base pairs of genetic sequence, finding a home for 10 percent of the DNA that is thought to be missing from the standard reference map of the human genome. Mathematician Giulio Genovese, a computational biologist in genetics at HMS and at the Broad Institute, working in the lab of geneticist Steven McCarroll, HMS assistant professor of genetics and director of genetics for the Stanley ...

Scientists used fruit flies to show for the first time that a new class of genetically engineered proteins can be used to watch nerve cell electrical activity in live brains. The results, published in Cell, suggest these proteins may be a promising new tool for mapping brain cell activity in multiple animals and for studying how neurological disorders disrupt normal nerve cell signaling. Understanding brain cell activity is a high priority of the President's Brain Research through Advancing Innovative Neurotechnologies (BRAIN) Initiative. Brain cells use electricity ...

The current systems for the production of chemicals, fuels and materials heavily rely on the use of fossil resources. Due to the increasing concerns on climate change and other environmental problems, however, there has been much interest in developing biorefineries for the production of such chemicals, fuels and materials from renewable resources. For the biorefineries to be competitive with the traditional fossil resource-based refineries, development of high performance microorganisms is the most important as it will affect the overall economics of the process most significantly. ...

SAN FRANCISCO, CA and COLLEGE STATION, TX—August 8, 2013—An enzyme is a tiny, well-oiled machine. A class of proteins that are made up of multiple, interlocking molecular components, enzymes perform a variety of tasks inside each cell. However, precisely how these components work together to complete these tasks has long eluded scientists. But now, a team of researchers has found a way to map an enzyme's underlying molecular machinery, revealing patterns that could allow them to predict how an enzyme behaves—and what happens when this process disrupted. In the latest ...

HOUSTON – (Aug. 8, 2013) – Female mice who were growth restricted in the womb were born at a lower birth weight, but were less active and prone to obesity as adults, said researchers from Baylor College of Medicine and the USDA/ARS Children's Nutrition Research Center (CNRC) at BCM and Texas Children's Hospital in a report that appears online in the International Journal of Obesity. "Given that human studies also show female-specific obesity following early growth restriction," said Dr. Robert Waterland, associate professor of pediatrics – nutrition at BCM, and a member ...