Brain activity in youth may presage Alzheimer's pathology
...eimer's disease?" Moreover, looking to see if the phenomenon varies or is the same among many individuals will be required to firm up the link between brain metabolism in early life and Alzheimer's pathology later in life. Understanding variation may also help us to explain why some people are at high risk for...Solving the mystery of mutated proteins and the brain
...m does it more potently."We are learning that this phenomenon of a normal protein acting as a toxin when in high levels is not unique," she said. For example, alpha-synuclein, a protein mutated in rare forms of inherited Parkinson's disease, also sometimes accumulates in cells of patients with the ordinary form...Scientists find that protein controls aging by controlling insulin
...mal resistant to insulin increases its lifespan a phenomenon found in animals ranging from worms to fruit flies to mice. The mice with higher levels of Klotho had more insulin in their system than the normal mice, suggesting that the Klotho mice were resistant to insulin; they had to make more of it to make u...Scientists determine structure of enzyme that disrupts bacterial virulence
...nimum number of bacteria are present. Hence, this phenomenon is called quorum-sensing. "Being able to disrupt quorum-sensing in these organisms could potentially augment our current treatments, and knowing the structure of this quorum-quenching enzyme will greatly help in developing more effective enzymes fo...A new view of human-chimpanzee genome differences
...gions of shared human-chimpanzee duplications -- a phenomenon the researchers dubbed "duplication shadowing." Discovery of this phenomenon, he said, could lead to greater understanding of the properties of chromosomal regions that tend to experience instabilities. "Such regions are pretty important from an evol...The 'been there, done that' memory response
...g the recognition process. Previous studies of the phenomenon have been done in monkeys and have measured only the electrical changes in individual neurons during memory tasks. Thus, wrote reviewers Chantel Stern and Michael Hasselmo in the same issue of Neuron, "Overall, the innovative use of multimodal techni...Mouse genome much more complex than expected
...e scientists came across an additional interesting phenomenon when they tried to find the 'original sources' of the mRNA copies in the DNA encyclopedia: information and nonsense are apparently not distributed randomly. Instead there are entire chapters with many different protein blueprints, which are separated...Researchers discover why melanoma is so malignant
... a patient's body into, say, the lymph nodes. This phenomenon isn't related to cancer, but rather demonstrates the latent ability of melanocytes to travel Finally, the research team found that when Slug was knocked out in melanoma cells, the cancer was unable to metastasize when placed into a mouse. "This work......r reduced genetic diversity is a relatively recent phenomenon and perhaps not as severe overall as it appears to be in the particular genes that were studied, Seger says. One Whale Species Became Three as Oceans Separated Some 20 million years ago, North and South America were separated by deep seas, but 18...Study in Royal Society journal on possiblity of human organ regeneration
...mer and Professor G Arnqvist (rspb.2005.3240) The phenomenon of ageing has always absorbed both scientists and general public, yet many factors that contribute to ageing remain unveiled. Recent evolutionary theory advocates that different sexes may evolve to affect ageing in each other in a way that is benefic...Ants, not evil spirits, create devil's gardens in the Amazon rainforest, study finds
...western Amazon to see how widespread the herbicide phenomenon is. "Megan's work reveals a system that is amazing because the ants exert so much control over their environment, creating single-species stands in one of the most diverse places on Earth," Gordon says....Requirement for high-level mental processing in subliminal learning
...rch--our understanding of classical learning and a phenomenon known as the attentional blink--to achieve an important demonstration that high-level mental processing is required even for subliminal learning. Subliminal learning is a low-level perceptual learning process that can occur without awareness of what ...Secrets to antibody's success against West Nile Virus surprise scientists
...vaders can reproduce. Fremont cautions that this phenomenon has not been seen in West Nile virus, but notes that when he and his colleagues tested the ability of several antibodies to prevent West Nile from reproducing inside macrophages, they found that only the therapeutic antibodies blocked the virus' repr...Looks matter to female barn swallows
...another bird. The researchers used this widespread phenomenon of cheating to test the factors that may keep a female barn swallow faithful to her mate. Sometimes males even rear an entire nest of illegitimate young. After all pairs had laid their first set of eggs, Safran removed the eggs so that the females wo...How the brain sorts babble into auditory streams
...o streams of beeps. The researchers could use this phenomenon to explore the neurobiology of perception of auditory streams, because they could explore how perception altered with the same stimulus. In the human studies, Micheyl, working in the MIT laboratory of Andrew Oxenham, asked subjects to listen to such ...NSF awards 19 new projects to better undestand genetic processes in plants of economic importance
...tigates the poorly understood, yet widely accepted phenomenon of "hybrid vigor," whereby offspring turn out bigger and hardier than their parents. Researchers at University of Illinois Urbana-Champaign explore nitrogen responses in maize to elucidate the genetic basis for dramatically increased yields followin...Study: 'Run-down feeling' with illness may last longer as people age
...-lasting sickness behavior syndrome." To study the phenomenon further, Johnson and colleagues examined the expression of more than 39,000 genes in the brain using microarray technology. The approach was helpful, because the gene expression pattern indicated brain inflammation emerged during aging. The emergence...Newly discovered hormone keeps digestive acid in check
...Fs may act as intestinal hormones and whether this phenomenon is relevant in humans," wrote Bo Angelin of Karolinska Institutet in an accompanying Preview. "The possible presence of a gut-liver signaling pathway may additionally help in the understanding of how distinct and rapid diurnal variation in bile acid ...Muscle of obese 'programmed' to amass fat, genetic study finds
...ol. Thus, our findings could reflect an epigenetic phenomenon in which obesity-induced modifications in gene activity provoke irreversible perturbations in SCD1 gene regulation." "While these findings may be somewhat discouraging news for those wishing to reverse obesity through dietary interventions, they also...Low blood glucose levels may complicate gastric bypass surgery, study shows
...mple insulin and perhaps an understanding of this phenomenon could be harnessed to help those with diabetes. "If we can understand what processes are responsible for too much insulin production and too many islet cells in these patients, we may be able to apply this information to stimulate insulin production...