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Tag: "animal" at biology news

New dopamine brain target discovered

...eceptors are stimulated at the same time. Using animal models. Drs. George and O'Dowd and their team identified this complex by its unique reaction to dopamine or specific drug triggers. Strikingly, stimulating this target with dopamine or specific drugs triggered a rise in calcium in the brain. As calc...

Fish can determine their social rank by observation alone, study finds

...that appeared later in birds and mammals. "Any animal that has evolved a social system that requires combat among males will have some kind of eavesdropping capability allowing them to surreptitiously draw inferences about their social rank," Fernald said. "Cognitive capacities that evolved in fish may ...

Scientists discover new species of distinctive cloud-forest rodent

A strikingly unusual animal was recently discovered in the cloud-forests of Pe...cause subsequent efforts to locate and observe the animal were fruitless. I. barbarabrownae belongs to a family of rodents known as "spiny rats" because mo...

How T lymphocytes attack

...rrive at their conclusion, the researchers used an animal model to observe the route followed by T lymphocytes in tumours endowed with a particular antigen, ovalbumin (OVA) and in tumours which served as controls and were devoid of this antigen. When the tumours reached 500 to 1000 mm3, eight to ten days a...

Protein therapy may reduce infarct size in heart attack patients

...otein kinase C inhibitor that had shown benefit in animal models, but had not previously been studied in humans. This first-in-human study suggests that this new drug may have promise as a potential therapeutic agent in heart attack patients. Innovation in Intervention: i2 Summit is an annual meeting for p...

Light-based probe 'sees' early cancers in first tests on human tissue

...ersity Medical Center. The team also is conducting animal studies to test the feasibility of incorporating fa/LCI into instruments for examining the colon, lung and other organs. Based on a study in hamsters, Wax and Duke postdoctoral researcher Kevin Chalut reported in the February 2007 issue of Cancer Epi...

Bacterial response to oxidation studied as toxin barometer

...ponse could be used to predict potential damage to animal and human cells. “But bacteria are different from mammalian cells,?said Rzigalinski, who is focused on neuroscience, particularly brain injury and aging, and nanotechnology ( http://nanoneuro.vcom.vt.edu/ ). “We wanted to see if the same type of ...

With cellulosic ethanol, there is no food vs. fuel debate according to MSU scientist

...cal Society annual meeting in Chicago. "We grow animal feed, not human food in the United States," Dale s...ost of our agricultural land is being used to grow animal feed. It's a lot simpler to integrate animal feed production into cellulosic ethanol production than...

Chemicals in brown algae may protect against skin cancer

...used by too much sun, new research suggests. The animal study indicates that chemicals called brown algae polyphenols (BAPs), which are found in a type of brown marine seaweed, might protect against skin cancers caused by ultraviolet B (UVB) radiation. UVB radiation in sunlight is thought responsible ...

Nanoparticles for delivery of prostate cancer treatment

..., gene delivery packets ?to deliver the therapy in animal models of human metastatic prostate cancer. "W...Icon gene, a system that was effective and safe in animal models and is being prepared for a clinical trial. "The advantage of nanoparticle vectors is tha...

Does a peptide affect the heart's response to social isolation?

...s similar to humans and therefore provide a useful animal model for investigating how the social environment influences behavior and cardiac function. Earlier studies by this research team showed that when prairie voles were isolated from their families, they displayed behaviors similar to depression and ca...

Researcher examines polymers created with poultry feathers

...ricultural wastes currently find uses in low-value animal feed or are simply disposed. Both come at a cost to the poultry industry that is passed onto consumers. The challenge in developing biodegradable plastics is creating a product as good as, if not better than, its petroleum counterpart, explains B...

Biologists call for better choice of model organisms in 'evo-devo'

...er time, when making assessments about how much an animal resembles its ancestor, because this information can be helpful in estimating how much an organism’s phenotype has changed." Dr Wills added: "Establishing criteria for choosing model organisms is important in this field, especially given the press...

Music genes and musical geniuses

...story of mankind through the comparison with other animal species; from the role played by music in children's education, to the study of children to understand the musical mind. Why do infant prodigies exist? Why haven’t we all become one? Are there any types of music that are objectively better suited to ...

Does evolution select for faster evolvers?

...hat the majority of the DNA in the genomes of some animal and plant species ?including humans, mice, wheat and corn ?came from HGT insertions," Deem said. "For example, we can trace the development of the adaptive immune system in humans and other jointed vertebrates to an HGT insertion about 400 million ye...

New UD technology removes viruses from drinking water

...rologist Kali Kniel, an assistant professor in the animal and food sciences department, who has provided critical assistance with the testing phase. "A serious challenge facing the water treatment industry is how to simultaneously control microbial pathogens, disinfectants such as chlorine, and toxi...

Monitoring poisons in the environment -- a woolly matter

... assess how the age of the sheep, and where on the animal the wool is taken from, influence results. Furthermore, it is intended to use samples provided by the British Wool Marketing Board in order to provide regional and national focus to this work. In addition, it is hoped that sheep can be of future use ...

Light wine intake is associated with longer life expectancy in men

...olic compounds contained in wine have been seen in animal to interfere with the formation, progression and rupture of atherosclerotic plaques ?the build-up of fatty tissue in the arteries that can result in stroke or heart attack. "Those people who already consume alcoholic beverages should do so lightly ...

Microbes compete with animals for food by making it stink

Microbes may compete with large animal scavengers by producing repugnant chemicals that deter higher species from consuming valuable food resources -- such as decaying meat, seeds and fruit, a new study suggests. Ecologists have long recognized microbes as decomposers and pathogens in e...

Single molecule extends fat mice lives by reversing gene pathways associated with disease in obese

...tect against Huntington's disease in two different animal models (worms and mice). "The "healthspan" benefits we saw in the obese mice treated with resveratrol, such as increased insulin sensitivity, decreased glucose levels, healthier heart and liver tissues, are positive clinical indicators and may mean...

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