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Tag: "stimuli" at biology news

Source of molecular triggers in cutaneous T cell lymphoma identified

... cells, the cancerous CTCL cells require antigenic stimuli delivered by specialized dendritic cells of the epidermis, referred to as Langerhans cells (LC), in order to replicate. To determine the nature of the activating antigen, Carole Berger, a research scientist in dermatology set up a physiologic labora...

Plants, animals share molecular growth mechanisms

...ferent ways or alter how cells respond to external stimuli so they can defend themselves against insect or fungal attacks," Szymanski said. A protein complex known as Actin Related Protein 2/3 (ARP2/3) is a cellular machine that controls formation of actin filaments, which are important for cell growth and ...

Implanted Devices Detect High-Risk Heart Failure Patients

...arts are unable to appropriately react to external stimuli by regulating their beating action -- are known to be at higher risk of suffering a heart attack. The new insight from CRT-D devices is possible because they record detailed data on heart function 24 hours a day. These new findings are important for...

50-year-old Mystery Solved: Protein Tags Regulate Key Ion Channel

...olvency," he added, "the ability to respond to the stimuli that are life, is all about the balance between ions inside and outside each cell. The gradual doling out or sudden influx of ions through ion channels are the basis for those cellular activities that give us thoughts, sights, tastes, sounds and our ...

Molecular thermometers on skin cells detect heat and camphor

...ins become activated when they receive the correct stimuli (such as a certain temperature), and this causes them to open and allow electrically charged ions to pass through and cause an electrical potential that signals the brain. Patapoutian and his colleagues discovered TRPV3 a few years ago by conducting...

DNA constraints control structure of attached macromolecules

... on the RNA structure can be modulated by external stimuli such as DNA oligonucleotide strands, protein enzymes and chemical reagents. While Silverman and Miduturu are currently using RNA as a proof of principle for their DNA constraint studies, they also plan to use the new technique to more effectively st...

UN successfully tests 'green' pesticide against locusts

... on the RNA structure can be modulated by external stimuli such as DNA oligonucleotide strands, protein enzymes and chemical reagents. While Silverman and Miduturu are currently using RNA as a proof of principle for their DNA constraint studies, they also plan to use the new technique to more effectively st...

Health costs soar as 60 million Americans classed as obese

... on the RNA structure can be modulated by external stimuli such as DNA oligonucleotide strands, protein enzymes and chemical reagents. While Silverman and Miduturu are currently using RNA as a proof of principle for their DNA constraint studies, they also plan to use the new technique to more effectively st...

Endocannabinoids ?the brain's cannabis ?demonstrate novel modes of action to stress

... oxytocin cells themselves. We are looking at what stimuli will cause oxytocin cells to release endocannabinoids to understand why this system might be important." Sabatier noted that most related experiments are carried out in rats, "but we think that the basic ways in which these circuits work is very sim...

Nicotine triggers the same brain reward circuitry as opiates

...demonstrate that nicotine-associated environmental stimuli can activate the same molecular signal transduction molecules as the drug itself," wrote Blendy and her colleagues. They wrote that the activation of CREB "is evident not only after acute and repeated nicotine administration, but also following expos...

Bitter or sweet? The same taste bud can tell the difference

...any taste bud cells that have receptors for bitter stimuli lacked this connection to the brain," Herness said...r now their next step is to apply bitter and sweet stimuli to taste bud cells that contain both NPY and CCK and see how each peptide reacts. Herness conducted...

Lance Armstrong through a physiological lens: hard training boosts muscle power 8%

...n (muscle) efficiency when cycling, as well as the stimuli that provided this adaptation, are unclear. The observation that both gross and delta efficiency improved to the same extent and also with the same time course suggests an improved efficiency of ATP turnover within muscle fibers during contraction." ...

Taking a flying jump

...ions were made in conjunction with non-directional stimuli such as switching lights on and off. Card's results imply that there could be a simple neural solution that "answers" questions within what is essentially a reflex arc. ...

Newly Discovered Role for Heart Response Enzyme May Yield Better Heart Failure Therapy

... in enabling the heart to respond to such external stimuli as exercise or stress, as well as in the progressive loss of heart function that is heart failure, the researchers said. Their findings, they said, suggest new approaches to prevent or reverse heart failure, which affects two to three million people...

Scientists uncover new clues about brain function in human behavior

...er signaling by the amygdala in response to social stimuli might be responsible for their fearlessness in social interactions. Next, researchers showed the study participants pictures of threatening scenes (a burning building or a plane crash), which did not have any people or faces in them and thus had no ...

Scientists create digital bacteria to forge advances in biomedical research

... cells as they sense their environment, respond to stimuli and move in a three-dimensional world," said Thierry Emonet, a Research Scientist in Philippe Cluzel's laboratory at the University of Chicago's Institute for Biophysical Dynamics. Emonet and his colleagues have verified the accuracy of AgentCell in...

Grasshopper love songs give insight into sensory tuning

...ds. These experiments revealed the distribution of stimuli called the "optimal stimulus ensemble" (OSE) that ...cal principles. "For instance, if a few important stimuli within the natural environment need to be encoded with high precision, a large part of a system's co...

Many cats unaffected by catnip, C&EN reports

... generally agree that a cat receives the necessary stimuli from receptors in its nose and mouth, she says. C&EN offers one tip for cat owners: Store catnip in your freezer to preserve its potency. Nepetalactone is volatile and will degrade over time otherwise. The American Chemical Society is a nonprof...

Researchers learn how blood vessel cells cope with their pressure-packed job

...and cooperation between mechanical and biochemical stimuli to regulate the proper orientation of these stress fibers," said Kaunas. "Indeed, we found that the stress fibers oriented in such a way to control their level of stress ?not too little and not too much." Chien and Kaunas collaborated with UCSD rese...

Brain activity related to processing faces is similar in people with, without autism

...thods can help a child with autism approach facial stimuli without anxiety. This is strictly conjecture, but it is a tantalizing possibility," Dichter said. Imaging allows researchers to begin looking at underlying mechanisms in brain function, Belger said. "Still, we must be careful in our interpretation ...

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