Tag: "stimulant" at biology news

Chocolate Treats Can Land Racehorse Trainers In Trouble

... said. While caffeine is a central nervous system stimulant in horses, as itis in humans, it would take several grams of caffeine to affect the performanceof a 1,000-pound racehorse, according to Sams. Sams and Timothy Dyke, a senior researcher in veterinary medicine, fedthree mares each 20 peanut M&M...

University Of Pittsburgh Involved In First Successful Example Of Gene Therapy For Pain Control

...erfere with an animal?sability to detect a noxious stimulant and react to danger," said Dr. Wilson. "Only when sensitivities to noxious stimuli are enhanced, a phenomenon that maybe important in chronic pain states, does the gene therapy act, with the resultthat gene-treated animals respond more slowly to this...

Hopkins study shows new target for boosting the immune system to improve cancer vaccines

...0 proteins on the APC, maynow be used to provide a stimulant that enhances cancer vaccines used intreatment and, at the very least, prevent the immune system from becomingtolerant to cancer cells," says Sotomayor. The T-cells studied in the Hopkins research, called CD-4+T-cells, arewell known to imm...

Human Genome Sciences announces the discovery of a novel immune stimulant

...ounced today that it has discovered a novel immune stimulant that mayhave significant medical use for the treat...gnaling molecules was found to be aspecific B cell stimulant in such tests. As an extension of this program, HGSscientists discovered and prepared the products ...

Caffeine in colas: 'The Real Thing' isn't the taste

...ds. Early advertisements played up its value as a stimulant until about 1920, when the U.S. government questioned its use in soft drinks. "The objections, however, were countered by industry," says Griffiths, "and sodas continued to contain caffeine. In 1981, the FDA again reviewed addition of caffeine to ...

New crop protection method could save US farmers billions

...n choline, a carbon source in wheat that acts as a stimulant for the fungus that causes FHB. Farmers can safely apply a biological control agent, or "microbial spray," to a crop close to harvesting time because it simply increases the concentration of naturally occurring bacteria. No biological method of con...

Report on dietary supplements containing ephedra makes urgent call for research to develop dose guidelines, safety warnings

...rived from guarana. "Both ephedra and caffeine are stimulant drugs, and when consumed in combination, the stimu...eling should be enforced, with all ingredients and stimulant quantities specified in a consistent way from product to product." In addition, Haller and Benowitz...

Scientists identify process that plays key role in brain changes involved in cocaine addiction

...g cocaine administration, consistent with cocaines stimulant actions. In rats treated daily with roscovitine, a compound that inhibits the action of Cdk5, motor activity one hour after cocaine exposure was nearly double that of rats that were not treated with the Cdk5 inhibitor. These behavioral findings indic...

Ecstasy component may help researchers measure brain damage from the drug

...d. In widespread use since the 1980s, Ecstasy is a stimulant with effects similar to the short-term euphoria and increased alertness claimed by cocaine users, according to the National Institute on Drug Abuse. It is considered dangerous, however, since it has been shown to damage nerve cells in the brain criti...

Ritalin may cause long-lasting changes in brain-cell function, UB researchers find

...ppear to be similar to those that occur with other stimulant drugs such as amphetamine and cocaine, said Joan Baizer, Ph.D., UB professor of physiology and biophysics and senior author of the study. Results of the research were presented here today (Nov. 11, 2001) at the annual meeting of the Society for Neur...

Protein could help rejuvenate oxygen-starved cardiac tissue, heal wounds

...e HIF-1α gene is already being explored as a stimulant to promote blood vessel growth in oxygen-deprived, or ischemic, tissue such as that associated with diabetic peripheral vascular disease, which can cause chronic leg ulcers that often precipitate amputation. It is being investigated as therapy to inc...

The immune system may be involved in the susceptibility to childhood attention deficit hyperactivity disorder (ADHD)

... exposure of many children to prolonged courses of stimulant medication such as Ritalin. Untreated, ADHD may le...tions showing reduction in symptoms in response to stimulant drugs such as Ritalin which augment dopaminergic and noradrenergic activity in relevant brain areas....

Does that 'java-jolt' affect coffee and non-coffee drinkers alike?

...d its down periods, coffee has remained a renowned stimulant since its first appearance, circa 1,000 A.D. Background The first recorded users of coffee are the Galla tribe in Ethiopia who noticed that they received an energy boost when they ground up the coffee bean and mixed it with animal fat. One tho...

UT Southwestern scientist explores caffeine-signaling activity in brain function

...g addiction, to explore questions about caffeine's stimulant effects. Normal mice given a 7.5 milligram/kilogra...known for some time that caffeine owes much of its stimulant action to its ability to block receptors, such as those for adenosine, in the brain. Adenosine, one ...

Human sperm may 'smell' their way to the egg, Science study suggests

...ctant" can act as a chemoattractant and a swimming stimulant to navigating sperm cells, the scientists considered the observed changes in calcium ion concentrations. As sperm cells move toward greater concentrations of the sperm attractant, the hOR17-4 receptor and the sperm-attracting compound bind, according...

Sex-based and women's health research gain $150,000

...r and response to repeated exposure to psychomotor stimulant drugs. "One of the primary aims of this study is to look at the XY and XX chromosomes in the sexes and determine if this genetic difference is responsible for the different drug-induced behavioral responses observed in female and male mice," she said...

Study finds potential way to improve cancer immunotherapy

...ells. The team used different classes of an immune stimulant known as CpG ODN (CpG oligodeoxynucleotide) to encourage different types of white blood cells, either separately or together, to work with antibodies to kill cancer. The new information could help doctors make antibodies more effective by providing ...

Genetics, alcohol sensitivity, and behavior

...GABAergic neurotransmitters appear to underlie the stimulant and sedative effects of alcohol, respectively. "Ne...ings, dopamine is thought to possibly underlie the stimulant effects of alcohol. GABA, on the other hand, is an inhibitory neurotransmitter. When activated by ...

K-State researcher working to improve alternatives to equine antibiotics

...tics. Specific DNA sequences found within one such stimulant are known as CpG motifs. These specific DNA sequences might be what stimulate an effective immunological response, Davis said. With hopes of helping to develop more powerful immune stimulants, Davis is examining different DNA sequences containing imm...

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