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Tag: "stress" at biology news

New clues to the dark side of a key anti-tumor guardian

...celerated aging, including osteoporosis, decreased stress resistance, and organ atrophy. The work is reported by Stephen Helfand and colleagues at Brown Universtiy, University of Connecticut Health Center, and University of Texas Southwest Medical Center. The researchers investigated the role of p53 in a...

New technique multiplies life span in simple organisms

...sen aspects of a starvation-response mode, such as stress resistance, even when food is plentiful. If enough food is available, an organism might be programmed both to reproduce normally and to maximize its survival systems. Longo urged caution in extrapolating the result to humans. "We have been very su...

Underlying cause of massive pinyon pine die-off revealed

... extreme dryness put the trees under so much water stress that the attacks from bark beetles finished them off. Under such conditions, the trees cannot make enough pine sap to defend themselves against the insects. "These trees are slow-growing trees, so we aren't going to have woodlands of this type back ...

Membrane research opens window to benefits for plants, humans

... close their water channels in response to drought stress in order to preserve their water content," said Tajkhorshid, who also is assistant director of research of the Theoretical and Computational Biophysics Group at the U. of I. Beckman Institute for Advanced Science and Technology. "It is interesting th...

Older female fish prefer imperfect male mates, study finds

...op a symmetrical pattern, while others survive the stress but show marks of the struggle. A population with a large amount of asymmetrical individuals may have been subject to a lot of environmental stress, such as pollution. ...

Software might revolutionize glucose monitoring in critically ill patients

...nitoring blood glucose levels isnecessary to avoid stress hyperglycemia, an insulin resistancecondition that causes glucose levels to go up and has been shown todecrease patient survival. GRIP will be released as open sourcesoftware. Mathijs Vogelzang and colleagues from University Medical CenterGroningen ...

Evolutionary conservation of a mechanism of longevity from worms to mammals

...ells and show that they are resistant to oxidative stress and exhibit reduced DNA damage when compared to ES...patocytes, suggesting that resistance to oxidative stress upon loss of mclk1 provides a growth advantage. Though the aging process of different organisms w...

Research: Snails were overlooked contributors to marsh destruction

...r that initiated these events ?and because drought stress is becoming more extreme with global warming, events like this could become both more frequent and intense," said Brian Silliman, the paper's lead author and an assistant professor in zoology at the University of Florida. Salt marshes are key to he...

Phenolic compounds may explain Mediterranean diet benefits

...ng at our results, that the reduction in oxidative stress and the increase in the nitric oxide bioavailability are behind the observed improvement in ischemic reactive hyperemia," Dr. Pérez Jiménez said. Dr. Pérez Jiménez said that olive oil may be superior to seed oils because it is a natural juice, press...

Anyway you slice it, tomatoes cut through drought with new gene

...t system could then take the adjustment to drought stress better and thus grow better," Hirschi said of the paper which details "a strategy to engineer drought-resistant crop plants." For example, regular or control tomatoes used in the experiment suffered irreversible damage after five days without wa...

Scientists show how thinking can harm brain cells

...oning would allow the nervous system to experience stress and become more resistant to future encounters with stress and the damage it can trigger," said Harris A. Gelbard, M.D., professor of Neurology at the Universi...

'Good' bacteria could save patients from infection infection by deadlier ones

Can it be that the stress on the use of antiseptics and antibiotics in hospi... the Royal College of Surgeons of England that the stress on antibiotics and scrubbing with antiseptic soap may actually open an avenue for the more virulent ...

Carnegie Mellon U. transforms DNA microarrays with standard Internet communications tool

...omputer Science. "Such systems under study include stress and drug response, cancer and embryo development." DNA microarray analysis -- a multimillion-dollar-a-year industry -- identifies gene activation in living, complex biological systems. DNA microarrays monitor the behavior of thousands of genes over ...

Stress substantially slows human body's ability to heal

The stress a typical married couple feels during an ordinary ...tifying and then explaining the ways psychological stress can affect human immunity. Jan Kiecolt-Glaser, a professor of psychiatry and psychology, and partn...

Antibacterial coatings cut infection rates

... by covalent bonding to our biomedical devices. We stress covalent bonding because it is important that we anchor them very firmly to the surface, making it impossible for them to break away and travel into remote organs such as the brain or liver," Professor Griesser said. UniSA PhD student in applied sci...

Depression model leaves mice with molecular scar

...05. "Our study provides insight into how chronic stress triggers changes in the brain that are much more l...ing and depression, but Nestler said social defeat stress probably similarly affects other genes there as well. The researchers pinpointed how social defeat ...

Plants give pests sock in the gut

...st herbivory," says Dawn Luthe, professor of plant stress biology at Penn State. Luthe and researchers at Mississippi State University have since developed several lines of corn resistant to multiple pests, using conventional plant breeding and insect-resistant strains of corn from Antigua. Researchers ...

Pitt professor's theory of evolution gets boost from cell research

... of whatever kind, to gain a foothold. But extreme stress pushes cells beyond their capacity to produce prot...the past, and you don't know what the cause of the stress was at that time," Schwartz said. "This new understanding of how organisms change provides us with ...

Liquid ventilation

...ecause the lungs of the premature baby suffer less stress and respire more easily. However, this story does not have a happy ending. The respirator, for the moment, is no more than a prototype. In the experiments carried out at the Cruces hospital in Bilbao with artificial lungs and with animals, the res...

Penguins okay with human visitors?for now

...and the level of a hormone secreted in response to stress (plasma corticosterone) of penguins when encounter... area," the authors explain. However, the authors stress that these results focus on the immediate. The consequences of the penguin's changing behavior may ...

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