Tag: "behavior" at biology news
Invasion of the brain tumors
...ceptor is sufficient to impart a dramatic invasive behavior
on genetically distinct tumors. These data highlight a previously unknown function of this receptor and suggest it may be a novel therapeutic target in the treatment of this devastating cancer. ...
Bursts of waves drive immune system 'soldiers' toward invaders
.... "We never expected to see this sort of complex behavior
within cells, but in retrospect it is an absolutel...ng like a series of exploding fireworks. The novel behavior
can be viewed at cvri.ucsf.edu/~weiner. The research findings are reported in the August 13, 20...
New, more direct pathways from outside the cell-to-cell nuclei discovered
...ter, Gavin periodically looked for this intriguing behavior
again, and occasionally glimpsed it again. But G...gh the apple, Gavin found the intruiging phagosome behavior
he sought by using the confocal microscope to repeatedly obtain views that sliced clear through the ...
Swarming starlings help probe plasma, crowds and stock market
...que that combines an earlier study of the flocking behavior
of large groups of birds and insects with information technology used to correlate information from a range of parallel signals. University of Warwick physicist Robert Wicks hit upon the idea of using an information technology tool called mutual in...
Genetic variation helps to understand predisposition to schizophrenia
...le of Neuregulin 1 type 4 in brain development and behavior
and determine how various alterations of the Neuregulin 1 gene lead to schizophrenia. By better understanding the genetic causes of schizophrenia, we can start to make sense of the underlying biology of the disease and develop improved therapies b...
JCI table of contents: Aug. 9, 2007
...wever, the molecular pathways that control feeding behavior
and cellular energy expenditure are highly complex...ove around more than normal mice. These effects on behavior
were associated with decreased signaling in the hypothalamus through a protein known as PPAR-alpha. ...
Disabling a sensory organ prompts female mice to act like male mice
...mbed the neural depths of sexually dimorphic mouse behavior
by engineering females to have functionally defici... findings provide strong evidence that male sexual behavior
is hard wired into the female mouse brain and suggests, more broadly, that male and female courtship...
A sensory organ, not the brain, differentiates male and female behavior in some mammals
... Rather, they say, the epicenter of sex-specific behavior
in many species may be a small sensory organ found...ly, the female mutants would replicate male sexual behavior
by mounting the hapless males and thrusting. The male mice responded with increasing aggression to...
Improved NIST SRM aids lead poisoning detection
... young children, causing learning disabilities and behavior
problems and, at high levels, seizures, coma and death. Children can be exposed to lead from lead-based paint in older buildings, or from contaminated soil near highways where vehicles once used leaded gasoline. Lead levels in children have dropped...
Unlocking proteins from their cellular shell
...d mapped, increasing the understanding of cellular behavior
and unlocking novel targetable sites for drugs that might interact with these active proteins to treat disease. The study appears in the current issue of the journal Science. Cells are exposed to forces every minute of every day. Some forces are ex...
Altering a protein makes mice less fearful
... ion channel protein (ASIC1a), reduces innate fear behavior
in lab animals, making normally timid mice relatively fearless. The findings might provide useful insight into anxiety disorders and may even point the way to a new therapeutic target. For humans and other animals, some fears seem to be, in large p...
New study demonstrates important role of glia in circadian timing
...ells that is required for the control of circadian behavior
in Drosophila (the fruit fly). Their findings, whi...to humans, have the ability to adapt the timing of behavior
or other processes to environmental cycles using an intrinsic time-keeping device called a circadian...
Forsyth scientists gain new understanding of adult stem cell regulation
...covered an important mechanism for controlling the behavior
of adult stem cells. Research with the flatworm, p...ay be extraordinarily relevant for controlling the behavior
of migratory, plastic cells. Further analysis in both planarians and in vertebrates will provide cr...
Molecule blocks gene, sheds light on liver cancer
...that miR-21 plays a fundamental role in tumor-cell behavior
and cancer development, Patel says, and this may also be relevant to other tumors in which miR-21 is overexpressed. If this work is reproduced in investigations of other cancers, it could be a big step forward, he says. ...
High rates of HIV infection documented among young Nepalese girls sex-trafficked to India
... prevention, we can no longer afford to ignore the behavior
of men and boys, said Silverman. Addressing the widely accepted male demand for commercial sex is critical to ending this modern day form of female slavery....
New aerogels could clean contaminated water, purify hydrogen for fuel cells
...ld not have effectively revealed the structure and behavior
of the gels. The high-energy X-rays produced by the APS, however, allowed the scientists to take accurate readings of the atomic distances within these disorganized materials. "This is where the APS really excels. It's the only place that has a dedic...
Strength of connections between brain regions may affect an adolescent's response to peer influence
... Brain regions that regulate different aspects of behavior
are more interconnected in children with high resistance to peer influence than those with low resistance, according to a new study published in the July 25 issue of The Journal of Neuroscience . "These findings may help develop more effective str...
Hepatitis C helicase unwinds DNA in a spring-loaded, 3-step process
...ime lapses between steps. Such studies measure the behavior
of hundreds of thousands of molecules at a time, and the results describe a whole population of reactions. Using single-molecule fluorescence analysis, the research team tracked how the hepatitis C helicase, NS3, unwound a duplexed DNA molecule tag...
Presence of wolves allows aspen recovery in Yellowstone
... of a natural predator appears to have altered the behavior
of the remaining elk, which in their fear of wolve...th the lower populations of elk, and their changed behavior
due to fear of wolves but its difficult to determine exactly which force is the most significant. ...
Scratch no more: Gene for itch sensation discovered
...stigate this possibility." They studied scratching behavior
in two sets of mice normal mice and GRPR knockout mice. Normal mice scratched vigorously when exposed to a variety of itch-producing substances, but the knockout mice scratched much less. "The fact that the knockout mice still scratched a little sug...
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