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Tag: "been" at biology news

Yellowstone microbes fueled by hydrogen, according to U. of Colorado study

...rmation on an entire ecosystem.That's never before been possible."The study was specifically designed to d...used to gather data, some of which hadnever before been collected. "No one had measured the concentration ofhydrogen in the hot springs before because the t...

It's not all genetic: Common epigenetic problem doubles cancer risk in mice

... Because precursor cells in the colon's lining had been identified as a likely starting point for tumors, ...arrying a mutation in a gene called APC, which had been tied to colon cancer by researchers studying families with excessive growths, or polyps, in the colo...

Priming embryonic stem cells to fulfill their promise

...ng, of most mammalian tissues. Untilnow, there has been no practical way to evaluate the daunting number o...it'scells in the liver, brain, or heart, there had been no practical wayfor researchers to find the optimal extracellular matrix needed to turnembryonic ste...

Growth in the sea comes down to a struggle for iron

... at understanding these natural systems, there has been some speculation that iron fertilization might be useful in reducing the threat of global warming. However, this idea remains highly controversial in scientific circles given the very limited understanding of these unique systems, says Wells. Wells ...

New binding target for oncogenic viral protein

... emphasized. "The study of DNA tumors viruses has been an extremely important tool in understanding the cellular pathways that regulate cell division and are disrupted in cancer. Understanding the mechanisms through which these viruses interact with the cellular machinery that regulates cell division may...

Poor prenatal nutrition permanently damages function of insulin-producing cells in the pancreas

...etes. The only difference was that the mothers had been fed differently during the final week. As the young mice matured, the researchers tested their blood glucose (sugar) after meals. At age 2 months, the results were similar between the two groups. But over time, differences began to unfold. When 4 mo...

Emory Study Tests Bone Marrow Stem Cells to Improve Circulation in Legs

... treatments,including surgery or angioplasty, have been unsuccessful, or patientsfor whom those treatments are not options. To find out more about thestudy and eligibility, call 404-712-0170....

Fox Chase Cancer Center scientists identify immune-system mutation

... time that a naturally occurring mutant strain has been found and bred at Fox Chase. In 1981, the laboratory group of Melvin Bosma, Ph.D., discovered mice with severe combined immune deficiency (SCID), a condition that also affects humans. In addition to providing a unique animal model to study the SCID s...

Controversial drug shown to act on brain protein to cut alcohol use

...lose future; it would help fix aproblem that we've been struggling with for ages. A naturally occurring ha...some clinicians as apotent anti-addiction drug has been rigorously studied for the firsttime, confirming its ability to block alcohol craving in rodents, an...

Neuronal 'traffic jam' marks early Alzheimer's disease

...ge of Medicine. According to Goldstein, there has been evidence that late-stage Alzheimer's disease invol...said Goldstein. The researchers used mice that had been engineered to have an abnormal production of human A-beta peptide that produced Alzheimer's-like pla...

Current human embryonic stem cell lines contaminated UCSD/Salk team finds

... available lines of human embryonicstem cells have been contaminated with a non-human molecule thatcomprom...cell surface of human embryonicstem cells that had been grown in traditional culture conditions. Thescientists further confirmed the presence of Neu5Gc with...

Drug That 'Tags' Decision-making Areas Of The Brain May Aid

...inical conditions inwhich these brain regions have been implicated,?Mukherjee said.He found in animal tests that Nifrolidine binds to receptors in thetemporal and frontal cortex, areas that are responsible for learningand memory as well as reasoning, planning, problem solving and emotion.According to Mukh...

Genome of deadly amoeba shows surprising complexity, evidence of lateral gene transfer

...rst complete genome of a free-living organism, has been at the forefront of the genomic revolution since the institute was founded in 1992. The Institute's scientists conduct research involving the structural, functional, and comparative analysis of genomes and gene products in viruses, bacteria, archaea,...

Antarctic ice shelf retreats happened before

...emperatures can break up ice shelves but there has been a suspicion for some time that the role of the ocean may have been underestimated. This is some of the first evidence that a shift in ocean currents can actually destr...

Anti-bacterial additive widespread in U.S. waterways

...lof Public Health. The chemical, triclocarban, has been widely used fordecades in hand soaps and other cle...other commonly used antimicrobial chemical thathas been studied in much greater detail because it is more easilydetectable.Using an empirical model and publ...

Newly-discovered class of genes determines ?and restricts ?stem cell fate

...lls were expressing genes that previously had only been known to be expressed in a developing embryo. That...rapies for cancer. Adult resident stem cells have been identified in many types of organs and may be a potential reservoir for tissue regeneration. A funda...

Tiny particles could solve billion-dollar problem

...alence and its toxicity. Human exposure to TCE has been linked to liver damage, impaired pregnancies and cancer. Cleanup costs for TCE nationwide are estimated in the billions of dollars. The Department of Defense alone estimates the cost of bringing its 1,400 TCE-contaminated sites into EPA compliance a...

Plants, animals share molecular growth mechanisms

...ough time as multicellular life evolved, they have been conserved in both plants and animals, Szymanski said. So, some of the plant proteins that comprise the ARP2/3 and the WAVE complexes are interchangeable with proteins in animals. Others proteins are not interchangeable, and Szymanski's research team ...

Researchers Uncover Key Step In Manufacture of Memory Protein

...hed through the cell membrane without first having been converted to active mBDNF. Because they cannot make mBDNF, CPE-deficient mice have poor long-term memory. Dr. Loh added that, in the near future, an understanding of the chemical mechanism she and her colleagues deciphered in the current study may p...

Research advances quest for HIV-1 vaccine

...n the February issue of Immunity. Vaccination has been a successful strategy for protecting humans from m...owever, designing a suitable vaccine for HIV-1 has been a highly challenging and thus far unsuccessful endeavor. HIV-1 is enormously variable and it has bee...

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