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Tag: "combined" at biology news

Ancient DNA provides clues to the evolution of social behavior

...ave occurred in the Andes roughly 3,000 years ago, combined with environmental change and competition from the larger species of tuco-tuco, likely caused the die-off. Most genetic studies rely entirely on modern DNA to estimate historical population size, but Hadly and Chan's technique provides much more det...

Newly discovered protein kills anthrax bacteria by exploding their cell walls

...ill kill them, usually in a matter of minutes. The combined solution could be used in buildings, on transportation equipment, on clothing, even on skin, providing a safe, easy way to fight the spread of anthrax in the event of a mass release. ...

When mice choose mates, experience counts

...ference was so strong that they even preferred the combined male/female scent when it was tainted with the scent of infectious parasites, opting for that over the scent of a healthy lone male. "Male odors can provide female mice with information on their quality, condition, health and suitability as a potent...

Novel molecular 'signature' marks DNA of embryonic stem cells

...ivates genes and another that represses them. When combined in this way, the negative influence seems to prevail and, as a result, the genes positioned near bivalent domains are silenced. However, the activating influence appears to keep the genes poised for later activity. "For genes, this is equivalent to r...

Gene therapy 'turns off' mutation linked to Parkinson's disease

...in some families. For this research, the Bohn lab combined a recently developed technology called "RNA interference" with gene therapy to turn off alpha-synuclein in dopamine neurons. RNA interference is a sophisticated method to selectively turn off one gene in a cell, leaving others unaffected. By placin...

Aspirin reduces cardiovascular risks in men and women -- but differently

...ntly reduce the risk of cardiovascular events -- a combined endpoint including stroke, heart attack and death ... was little data," Berger continued. "But now, the combined data of recent trials involving women demonstrates that women can benefit just as much from aspirin ...

Laos ?a lost world for frogs

...st areas remaining in Southeast Asia. However, the combined loss of forest cover (estimated at nearly 55 percent) and over-exploitation of many species threatens much of Laos's wildlife. Already, a newly described salamander species found by Stuart in Laos has turned up earlier this year in the Japanese pet ...

Curry and cauliflower could halt prostate cancer

...d prevention of prostate cancer, particularly when combined with certain vegetables. The scientists tested turmeric, also known as curcumin, along with phenethyl isothiocyanate (PEITC), a naturally occurring substance particularly abundant in a group of vegetables that includes watercress, cabbage, winter cr...

Weizmann Institute suggests that immune cells help to maintain cognition and brain cell renewal

...hey repeated the experiment using mice with severe combined immune deficiency (scid mice), which lack T cells and other important immune cells. Significantly fewer new cells were formed in those mice. On repeating the same experiment, this time with mice possessing all of the important immune cells except for...

Molecule by molecule, new assay shows real-time gene activity

...med by background noise. The gene coding for this combined protein was substituted for the well-studied lacZ gene in the Escherichia coli chromosome. When lacZ's regulatory machinery allows the modified gene to be converted into a handful of protein molecules, these Tsr-Venus hybrids migrate to the cell memb...

Genomics-based vaccine could prevent deadly cattle disease

... for an East Coast fever subunit vaccine. Based on combined bioinformatics analyses and lab tests, these proteins appear to provide a protective immune response to the disease. "This initiative took just three years, after many years of scientists trying other methods," remarks Vishvanath Nene, a study author...

NHGRI announces new sequencing targets

...lable in public databases. Scientists will use the combined data to look for features that are similar, or conserved, among the genomes of the human and other mammals. The eight new mammals to be sequenced will be chosen from the following 10 species: dolphin (Tursiops truncates), elephant shrew (Elephantu...

Predicting chemotherapy outcome

...etween patients who subsequently responded well to combined chemotherapy and patients who were resistant to th... carried out before the patients were treated with combined chemotherapy of folinic acid, 5-fluorouracil and irinotecan. Imbeaud and colleagues identified 679 ...

New brain hormone puts brakes on reproduction

...for estrogen-like compounds such as estradiol, the combined evidence suggests that GnIH is a direct inhibitor of GnRH. Because the brain cells producing and secreting GnIH send their axons into many areas of the brain, GnIH may have other effects on the brain, too. "Though we don't know in mammals where the...

Georgia Tech accelerates drug discovery with new IBM supercomputing cluster

... "IBM has taken its leading server technology and combined it with our leading switch/router in a single high performance cluster solution to provide organizations like the Center for the Study of Systems Biology with the computing power they require to for advanced scientific research." Also included with ...

Potential heart benefit found in stem cells

...s with ischemic cardiomyopathy were treated with a combined percutaneous injection (both intramyocardial and i... functioning muscle tissue in the heart wall. The combined stem cell injection resulted in an increase in global EF, (from 34.8 to 39.5 percent), as well as a ...

'Genetic network' guards against lethal DNA damage

...rk of genes could help to identify mutations whose combined deleterious effects cause human diseases, including cancer and neurodegeneration, as well as aging. "The interactions we discovered in yeast could also help researchers select the human versions of these genes suitable as targets for the development...

Unraveling the mysteries of poison

...mistry and other German and French colleagues have combined magnetic resonance spectroscopy (solid-state NMR) ...rench colleagues from the University of Marseille, combined a new method of solid-state NMR with particular protein synthesis procedures and looked at the examp...

Faults in newly discovered breast stem cells may lead to tumours

...ed that an accumulation of genetic errors, perhaps combined with external influences and a family predisposition, could cause the breast stem cell or a "daughter" cell to produce faulty cells. In effect, the errant breast cell can become a tumour factory. For many years, scientists and clinicians have been ...

Scientists identify molecular structure of key viral protein

...efense. The pre-fusion structure of the F protein combined with the structure of the protein in its post-fusion state, which was determined and reported earlier in 2005 by this same research team, gives scientists a complete picture of how the paramyxovirus F protein works to infect the cell. The F protein...

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