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Tag: "excess" at biology news

Excess liver gene protects against high-fat diet

...ay issue of Cell Metabolism reveals. Mice with an excess of liver X receptor (LXRa), when fed a diet high i...markably, in mice fed a normal, balanced diet, the excess receptors worsened blood lipid levels, the researchers reported. The findings suggest that natural ...

Discovery of New Dopamine Action May Yield Alternative Psychiatric Drugs

...y associated with triggering feelings of pleasure, excess concentrations of dopamine underlie schizophrenia, attention deficit hyperactivity disorder and other psychiatric conditions. The findings therefore provide new research avenues to understand and potentially manage such dopamine-related human disorde...

Gene keeps neural cells on correct developmental path

...down the REST gene. "The cell gets rid of all the excess protein, kicks it off the DNA, then stomps on its head so it can't make RNA," Mandel said. "We can't detect REST in the terminally differentiated neuron." But some molecular partners of REST remain, perhaps fine-tuning gene expression in mature neuro...

Stem cell research - new cell lines

...ederal government's moratorium limiting the use of excess embryos ends. ...

Finding hidden invaders in a Hawaiian rain forest

...vader shades out nearly all other species, so this excess nitrogen is not available to other species. Although we don't know exactly what the domino effects of this invasion will be, we are in a good position to predict them as we learn more about the chemical changes the forest is undergoing." The scienti...

Man-made wetland's effectiveness similar to natural marsh

... condition known as hypoxia. Hypoxia happens when excess nutrients, such as nitrates and phosphorus, accumulate in a body of water and cause excessive growth of algae and algal blooms. These blooms thrive on the nutrients and deplete the water of nearly all of its oxygen. Wetlands experts estimate that th...

Oceans more vulnerable to agricultural runoff than previously thought, study finds

...y fertilizer runoff from farms, which dump tons of excess nitrogen into rivers that eventually flow into the...hort windows of time during a six-month cycle. The excess water from irrigation runs off through streams and channels into the estuaries and then out to sea."...

Multi-purpose protein regulates new protein synthesis and immune cell development

...enes involved in protein degradation to get rid of excess unfolded proteins. So you reduce the load, get rid of garbage and increase efficiency. If these don't work, the cell will die." "Recently, scientists have discovered that the unfolded protein response is activated in many diseases from viral infecti...

Iron exporter revealed that may explain common human disorder

...ontain. Macrophages and liver cells also store any excess iron. Earlier work had identified a single protei...ose with hemochromatosis, Andrews said. Those with excess iron for other reasons, such as repeated blood transfusions, might also benefit from such a drug, sh...

Antiretroviral therapy may prevent excess risk of some cancers in people with HIV

...ve antiretroviral therapy (HAART) may prevent most excess cases of Kaposi sarcoma and non-Hodgkin lymphoma, ...avioral risk factors such as smoking. To estimate excess cancer risk in people infected with HIV and investigate the modifying effects of the use of HAART an...

Substance protects resilient staph bacteria

...liminate PGA production and one altered to produce excess PGA--to show that PGA protects S. epidermidis from innate immune defense, human antibiotic compounds and salt concentrations similar to levels found on human skin. Dr. Otto's group also used mice fitted with catheters to demonstrate that the S. epide...

Implanted Devices Detect High-Risk Heart Failure Patients

... relax blood vessels (ACE inhibitors)or remove the excess buildup of fluid in the lungs (diuretics). Implantable devices are the latest options in preventing arrhythmias that can lead to sudden death, with CRT-Ds being the latest technology. CRT-Ds perform two main functions. First, the devices electricall...

Why do insects stop 'breathing'? To avoid damage from too much oxygen, say researchers

...their respiratory systems periodically to keep out excess oxygen, thus preventing damage to their tissues. ...me high volume it uses while flying. The result is excess internal oxygen that can cause oxidative damage -- the destruction of biomaterial due to excess oxyg...

Essential mangrove forest threatened by cryptic ecological degradation

...stically affect the coastal zone by introducing an excess of fresh water. The consequences range from adverse shifts in the composition of mangrove tree species to disrupted ethnobiological relationships, lagoon fisheries, and many additional functions provided by mangroves. The authors believe that the wo...

Yale Scientists Find MicroRNA Regulates Ras Cancer Gene

...ormal structures of the worm ?instead they make an excess of their cells. After identifying let-7 as a cell division regulator, Slack's team used bioinformatics and found the relationship to Ras. Let-7 in humans is identical to the sequence in the worm, and both binding site and pathway for Ras are highly ...

Sea skate experiment sheds light on human cell transport

...e. This activates the gates, which open to release excess water along with salts and other organic material.... findings shed light on how these organs cope with excess water. But Goldstein and Musch also believe the mechanisms that trigger this cellular "release valve...

Gene therapy converts dead bone graft to new, living tissue

...d osteoblasts, rebuilds the bone when the body has excess calcium. In an average year, a healthy person may remove and rebuild 10 percent of his or her bone structure. This process of teardown and rebuilding is triggered in the dead bone when Schwarz paints it with the genetically modified virus. New blood...

Growth in the sea comes down to a struggle for iron

...our coast, but these other areas have a persistent excess of nutrients because phytoplankton growth is reduced." Many scientists from around the world are now studying iron effects in these regions. Though scientific efforts are aimed primarily at understanding these natural systems, there has been some sp...

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