system 2 7

Tag: "system" at biology news

Hybrid molecule causes cancer cells to self-destruct

...s formed naturally at high levels in the digestive system by symbiotic bacteria that feed on fiber, can restore healthy cell functioning. Efforts to use butyrate as a general drug for tumors elsewhere in the body, however, have been hindered by the high doses of the compound needed to effectively eradic...

Fighting influenza & co. with 40,000 blood samples

...this is that with age the fire power of the immune system is reduced. Why this is the case is largely unknow...rgely inactivate the viruses and enable the immune system to deal with the small amount of residual viruses. Spanish flu took the lives of at least 25 millio...

Soft-cell approach cuts animal tests

... to have adverse health effects on the respiratory system of workers. Increasingly, new formulations are usi... or affected by air pollutants. As the respiratory system is both a site of toxicity for pulmonary toxicants, and a pathway for inhaled chemicals to reach oth...

Nanotechnology meets biology and DNA finds its groove

...s on surfaces is really hard," says Schwartz. The system developed by Schwartz, de Pablo and their colleagu...o the new technology, argues Schwartz, is that the system is comprehensive, inexpensive and simple enough to lend itself to large-scale efforts to analyze DNA...

Are one-third of costly implanted heart devices unnecessary? New study suggests yes

...uidelines received one, it would cost the Medicare system an additional $2.9 billion to treat all of them for life. The use of the MTWA test could potentially save a large part of those costs. But using MTWA testing to determine who will get the most benefit from an ICD is still not standard practice, de...

When your brain talks, your muscles don't always listen

...biology of the brain introduced him to the nervous system and movement, and he was hooked. His interests were further piqued during a summer research experience, where he had the opportunity to work with wheelchair athletes. "People with severe spinal cord injuries have limited cooling because they can't...

Stem cells act through multiple mechanisms to benefit mice with neurodegenerative disease

...stem cells - or isolated directly from the nervous system (called "adult" stem cells to distinguish them from embryonic stem cells even though they are taken from developing brain tissue). Both types of human stem cells were actually somewhat more effective than the mouse neural stem cells. And, they were e...

Bisexual fruit flies show new role for neurochemical

...ar glutamate, which just floats around the nervous system and has generally been ignored because no one knew where it came from or what it was doing. For years, scientists failed to identify glutamate as a key neurotransmitter precisely because there was so much of it. "It made no sense," said Feathers...

A genetic 'gang of 4' drives spread of breast cancer

...nt in the four genes directly into the circulatory system of mice. "When these cells reached the lung capillaries, they just got stuck there," said Massagué. "We concluded that metastatic cells use these same genes to loosen up cells in capillaries, so that the cells can penetrate the lung tissue to grow th...

Robotic exoskeleton replaces muscle work

...exoskeleton controlled by the wearer's own nervous system could help users regain limb function, which is encouraging news for people with partial nervous system impairment, say University of Michigan researchers. The ankle exoskeleton developed at U-M was worn...

Africa's first large-scale HIV vaccine study launches

...well tolerated and that the response of the immune system or immunogenicity is high. In South Africa, the vaccine trial is called "Phambili," which means "moving forward" in the Xhosa language. Volunteers will be healthy HIV negative males and females, aged 18 to 35 years, who are sexually active and n...

Chlamydia vaccine a step closer to reality

...to deliver proteins to a part of the body's immune system and they are also easy and user-friendly." He said with rates of Chlamydia infection in some Australian communities as high as 12 per cent of the female population, there was a "real need" to develop a vaccine. "Chlamydia is the most common inf...

A new study of living cells could revolutionize the way we test drugs

...r Geim. This would put an early safeguard into the system that could be applied long before the drug was tested on animals or even humans. In addition, the electrical activity test could be used to monitor the effects of pollution on naturally occurring micro-organisms in the environment. To detect a ce...

Cold sore virus might play role in Alzheimer's disease

...e, traveling from its hiding places in the nervous system to cells around the mouth, damaging cells and caus... inflammation often is a byproduct when the immune system fights an infection....

Link found between immune system and high plasma lipid levels

... have found an unsuspected link between the immune system and high plasma lipid levels (cholesterol and trig...ase. "Besides showing a link between the immune system and elevated lipids, this study also opens a new avenue for the study of the close and complex link ...

Cancer-killing invention also harvests stem cells

...captured cells were stem cells. King envisioned a system by which doctors could remove stem cells from the bloodstream by flowing the cells through a device, and make a more concentrated mixture containing, say, 20-40 percent stem cells. These stem cells could then be used for tissue engineering or bone m...

Antifungal drug kills TB bug

...m survives the initial attack by the body’s immune system and then lies dormant, usually in the lungs, waiti...the AIDS epidemic, which destroys the human immune system and has allowed TB to get a grip once again." London is the TB capital of Europe, although most l...

In-shell vaccine for chick disease

... (Defra) and Intervet UK, used a 'reverse genetic' system to produce new vaccine strains. Existing strains, which are usually delivered by less efficient spray or drinking water dosage, can prevent chicks hatching if delivered in the egg. The scientists have extracted a so-called spike protein from a pa...

Technology reveals 'lock and key' proteins behind diseases

...that fit with the transporters, the only screening system sophisticated enough to work with delicate membrane proteins. Simply, if two proteins interact in iMYTH, they will stain the yeast cell blue. "Like lock and key, if two proteins interact with one another, it is safe to assume they participate or regu...

New mechanism for nutrient uptake discovered

...better crops. "Every cell in every organism has a system for bringing in nutrition and expelling waste," ex...hain-reaction among the different pores allows the system to shut down extremely fast and can even memorize previous exposures," noted co-author Wolf Frommer....

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