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Tag: "system" at biology news

Keeping the immune system from starting a 'food fight'

After every meal, the body must prevent the immune system from launching an all-out fight against food. Now, researchers report the identity of a nutrient "floodgate" that serves to protect against such an inflammatory immune response. Their findings appear in the May 4, 2007 issue of the journal Cell, a pu...

Nitric oxide: Key to cardiovascular and pulmonary function and drug effectiveness

...bility of nitric oxide to inhibit a key regulatory system which ordinarily shuts the receptors off after they are stimulated The researchers reported their latest findings on Friday, May 4, in the journal Cell. "This work is significant in that it demonstrates how two of the most pervasive physiolog...

Corals -- More complex than you?

...s in evolutionary terms, it has many of the immune system genes that protect people against disease. In fact...n, DNA imprinting, stress responses and key immune system genes. "We actually have quite a lot in common with corals, though it might not appear so," Profe...

Anthrax paralyzes immune cells with lethal toxin, UF research shows

...portant clues about how anthrax escapes the immune system during infection," said Nick Duesbery, Ph.D. deputy director for research operations and senior scientific investigator at the Van Andel Institute in Grand Rapids, Mich. In 1998, Duesbery discovered that the toxin interrupts the transmission of si...

Targeting sugar on blood vessels may inhibit cancer growth

...ly on endothelial growth, such as the reproductive system and wound healing, remained robust." Studying mouse models with a genetic alteration in an important sugar-modifying enzyme (Ndst1), the researchers saw a marked decrease in the growth of experimental carcinomas. The Ndst1 enzyme is responsible f...

Students invent protective pouch to enhance cell therapy

... an index finger, carries blood from the digestive system into the liver. The pouch components are made to be compressed and inserted with catheters that a physician can snake into the abdomen through the femoral vein in the leg. Using real-time imaging technology, an interventional radiologist can view...

New technique will produce a better chromosome map

...professor Thomas Huang to analyze the images. "Our system will give an impartial estimate of the band location. It will not be researcher-dependent. It will be objective." To improve chromosome spreading, researchers use a rotary tool that vibrates the coverslip surface for several minutes. A simple mech...

Gene mutation linked to cognition is found only in humans

...ion of novel splicing forms in the central nervous system in the emergence of human cognition."...

New Brandeis research sheds light on memory by erasing it

...ntiation (LTP). This process has served as a model system for studying memory. CaMKII has been a leading candidate as a memory molecule because it is persistently activated after LTP induction and can enhance synaptic transmission, properties that are necessary for a memory molecule. Like a computer whos...

Risk of lymphoma increases with hepatitis C virus infection

... higher among U.S. veterans who use the VA medical system (5 percent) than in the general population, where only 1.6 percent carry the virus. Several factors have likely contributed to this higher prevalence, including demographics, socioeconomic status, and particularly a history of injection drug use or ...

Fat screen delivers plant-derived chemical with antidiabetic effects

... harmine itself has effects on the central nervous system that may preclude its use, "it may eventually be possible to separate the nervous system and metabolic effects of harmine through optimization of the chemical structure," said Peter Tontono...

Molecule that destroys bone also protects it, new research shows

An immune system component that is a primary cause of bone destruct...s diseases, white blood cells of the innate immune system called neutrophils play a critical role in fighting infections. In fact, humans with neutrophil def...

Diminishing dinosaur steps saved by laser and laptop

...dge equipment. Using a high-tech laser scanning system called RIEGL, researchers from The School of Earth, Atmospheric and Environmental have produced an interactive 3D model of a quarry face covered in thousands of tracks made by the late Cretaceous dinosaurs, including sauropods and possibly predatory ...

DNA-damage test could aid drug development

...into a live mouse, the new assay is a cell-culture system that could allow hundreds or thousands of tests to... adapt techniques from an established cell-culture system based on mouse fetal liver cells to create a new system based on adult red cell precursors from mous...

Sleepless for science: Flies show link between sleep, immune system in Stanford study

...ws the animal is infected, and how does the immune system know that you are not sleeping properly"" said Schneider. "How do those messages get sent back and forth"" Their findings also raise the question of why the flies have a change in their sleep pattern when infected. The researchers speculate that f...

Thymus transplants gives hope to babies with fatal immune disease

...eceive such a transplant at Duke to correct immune system deficiencies caused by a condition called DiGeorge... a gland that is responsible for "teaching" immune system cells known as T cells how to attack and fight off infections. Babies with DiGeorge anomaly also can...

Dinosaur hearing, listening to muscle noise, quieter cubicles

...easurements of an "acoustic tripwire" surveillance system for detecting intruders in harbor entrances. Thei...ng to carry out terrorist activities. The in-water system consists of sets of sonar dishes that transmit and detect sound waves. Signal-processing algorithms...

Herpes infection may be symbiotic, help beat back some bacteria

...ed the surprising finding to changes in the immune system triggered by the long-term presence of a latent he...dy vaccines, autoimmune diseases, and other immune system issues have the potential to produce misleading results. "Chronic virus infections may in part de...

The quest for an effective HIV vaccine presents new possibilities, challenges

...c microbe. Because of initial exposure, the immune system develops the ability to recognize the specific mic...system. The interaction between HIV and the immune system is complex, and how different HIV-specific immune responses help to control infection is only partia...

Study warns deep-sea mining may pose serious threat to fragile marine ecosystems

...rated underwater mine cutters and a hydraulic pump system to transfer roughly two million tons of ore per year to the surface. These strips would be located approximately 500 meters to two kilometres from the active vents, but Halfar argues that the cutting and pumping process will disgorge considerable amo...

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