Tag: "rats" at biology news

New study shows hope for treating inhalant abuse

...lant abuse. The study was conducted by putting rats through a series of conditioning tests. The tests ... randomly administered either saline or GVG to the rats one hour before the testing. They then gave the rats free access to the chambers with no toluene pre...

Females may be more susceptible to overindulge 'sweet tooth' cravings than males

...iet when a sweet diet is freely available, female rats consumed more calories per day than male rats when given a chance to exercise, overeating was reduced in both sexes of rats, but the caloric i...

New way to protect brain from stroke damage

... Portland, Oregon). What's more, the team reports, rats injected with agents known to block ASICs--including the venom of a tarantula spider--exhibited a reduction in brain damage from ischemia. Mice lacking a functional copy of the ASIC gene were similarly resistant to stroke damage, they found. "Our stu...

NJIT professor receives Presidential Award for breakthrough research with adult stem cells

...rial degrades. Arinzeh performed animal studies on rats with bone defects; she also did cell-culture studies. Both showed that the biomaterials stimulated stem cells, producing new bone tissue and fully repairing the rats' bones. After 12 weeks, their bones were regenerated, with full restoration of the m...

Wrapping a memory with an experience, capacity for recollection detected in non-human species

...ry and Brain have provided the first evidence that rats use recollection when recognizing items they have ...ide the conventions of the discipline and ask, "Do rats have a capacity for recollection?" In humans, signal detection techniques have been used to distingu...

Long-term effects of carbon monoxide poisoning are an autoimmune reaction

...ies to navigate and memorize a maze. "CO poisoned rats don't learn," said Thom. "But if you render their...reby short-circuiting the lymphocyte response, the rats learn normally." Thom says that overall this work suggests that the 50 percent or more of patients w...

NIGMS funds Center for Quantitative Biology

...ties of genes from viruses, bacteria, yeast, mice, rats and humans. A key feature of the project is the use of advanced computational methods to model complex biological systems based on large quantities of experimental data, a systems biology approach. To help spur further biomedical discoveries, the c...

Enzyme activation appears key in helping internal clock tell night from day

...ents at a molecular level deep within the brain of rats where, like in all mammals, the primary circadian clock is located. The clock is a dynamic biological process with a near-24-hour cycle. PKG-II is an enzyme, a protein that triggers biochemical reactions. Reporting in the Aug. 19 issue of the journ...

Embryonic stem cell therapy shows steady benefits in rebuilding infarcted heart

...ial for becoming cardiomyocytes. Randomly assigned rats that had been induced with myocardial infarction were injected directly into the damaged heart area either with the embryonic stem cells or were subject to a control or "sham" protocol. Three weeks after therapy, the cardiac contractile function of b...

Forgetting, reminding, and remembering: The retrieval of lost spatial memory

...ifteen years ago, takes advantage of the fact that rats are good swimmers but prefer life out of water. Ra...the surface. The new twist on the protocol gives rats a reminder by briefly raising the platform above the water in either the learned location or in a ne...

Infant rats eagerly accept high concentrations of alcohol upon first exposure

...r abuse later in life. Research shows that infant rats are eager to accept high concentrations of alcohol...ly with the standard rejection of alcohol by adult rats upon first exposure. This finding may have implications for human infants. Early exposure to alcoho...

Size does matter when choosing a mate

...are much bigger than female gorillas, whereas male rats are only slightly larger than female rats. In this new research, scientists from the Universities of Bath, Oxford and East Anglia, carried out complex statistical analyses of the mating behaviour, body size and ecology of more than 100 different sho...

News tips from the Journal of Neuroscience

...ping process. The remapping was more pronounced in rats that received contextual training. The authors suggest that place cells can convey not only the geometric details of an environment, but motivational and behavioral cues as well....

JCI table of contents, 2 August, 2004

...with the lower levels of the enzymes, these fasted rats likewise did not have a significant amount of the active (cleaved form) of thyrotopin-releasing hormone. Giving leptin directly to these rats, increased enzyme levels and, inevitably, the amount of active thyrotopin-releasing hormone. These data prov...

'Smart gene therapy' protects against damage from heart attack

...into the heart, liver and skeletal muscle of three rats in the laboratory. Five weeks later, they restrict...the gene therapy. After four months, the untreated rats still showed marked thinning of the heart wall, while those treated with the gene construct showed v...

Leptin has layers of control

...with the lower levels of the enzymes, these fasted rats likewise did not have a significant amount of the active (cleaved form) of thyrotopin-releasing hormone. Giving leptin directly to these rats, increased enzyme levels and, inevitablely, the amount of active thyrotopin-releasing hormone. These data pr...

New UCF researchers, college will help fight Alzheimer's disease, cancer

...h, Sugaya determined that the memories of aged lab rats swimming in a maze dramatically improved when heal...jected into their brains. In some cases, the older rats began to perform as well as young ones in the maze. Sugaya plans to continue using rats to test the ...

Epilepsy: Signals 'brake' in brain impaired

...ific ion channels absorb the neuronal activity. In rats suffering from epilepsy, however, this signals bra...rom Marseilles discovered in the case of epileptic rats that the signal processing is not only affected in the synapses but also in the neurons themselves. ...

Leptin and obesity

...studied chemical changes in the brains of mice and rats injected with leptin to arrive at their findings. The Brown/Rhode Island Hospital research team included Nillni and Ronald Stuart. Christian Bjorbaek, Li Guo and Heike Munzberg worked on the project through Harvard and the Beth Is-rael Deaconess Medi...

Fluid derived from aloe plant prolongs life after hemorrhagic shock in animal study

...ity of Pittsburgh's School of Medicine, five of 10 rats that were injected with a small amount of a normal saline solution survived four hours after hemorrhagic shock. Of the animals treated with a same amount of saline and the aloe-derived DRP, eight of 10 survived. The animals treated with DRP also fare...

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