vicious 2 1

Tag: "vicious" at biology news

Neuronal 'traffic jam' marks early Alzheimer's disease

...he communications centers of the nerve cells. In a vicious cycle, the traffic jam also could increase production of an abnormal protein that clogs neurons, leading to their failure and eventual death. The researchers said their findings could provide information that might be used to develop drugs to preser...

Researchers extend mouse lifespan by protecting against free radicals

...e flaws in the cell's chemical processes, making a vicious cycle that leads to more free radicals, more cellular damage, and so on. The researchers studied mice with a genetic variation that made them produce more human catalase, the enzyme that breaks down hydrogen peroxide. They targeted delivery of the c...

Purdue scientists may have found key to halting spinal cord damage

...olein may be the primary culprit that enables this vicious cycle. Because acrolein has already been implicated in cancer and neurological diseases, drugs that detoxify it could become important for treating not only spinal cord damage but a host of other conditions as well." The research, which Shi carried ...

Gaining ground in the race against antibiotic resistance

...in the resistance race, and it might help slow the vicious cycle enough to develop antibiotics impervious to lactamases. ...

The bioweapon is in the post

...tain genes from the smallpox virus, or a similarly vicious pathogen. Well, it's not. Armed with a fake email address, a would-be bioterrorist could probably order the building blocks of a deadly biological weapon online, and receive them by post within weeks. That's the sobering reality uncovered by a New S...

Animal models show that anabolic steroids flip the adolescent brain's switch for aggression

...ive. Even after the drug was withdrawn, the newly vicious hamsters attacked, bit and chased the intruders. In fact, their aggressiveness measured ten times greater than that of control hamsters injected with oil only. Their full-blown aggression ?clearly drug-induced -- lasted for nearly two weeks of with...

Researchers reverse juvenile diabetes in animal model

...e. "The injections proved capable of stopping this vicious cycle, and through this process curing type 1 diabetes in a mouse." Until now, scientists weren't sure why the immune system attacks the beta cells, but the result is that the body stops producing insulin. When that happens, glucose builds up in the...

World faces challenge as life expectancies lengthen, scientist says

...id: "If that happens, you get negative feedback, a vicious circle. Those countries that get locked out stay locked out." Medical technologies around the globe An example of this inequality, Tuljapurkar said, is the lack of availability of AIDS antiretrovirals in Africa. Although these medications are wid...

Wild bees and the flowers they pollinate are disappearing together

...e versa, or indeed whether the two are locked in a vicious cycle in which each is affecting the other. It's also not clear as of yet what the ultimate causes of the declines are, although land use change, agricultural chemicals and climate change may be important factors. The researchers hope to clarify the...

The vicious cycle of rainforest destruction

... The researchers think we may be at the start of a vicious cycle, where global warming causes the rainforests to shrink, so increasing the amount of carbon in the atmosphere, raising the earth's temperature and magnifying the impact on the rainforests. Heading the work at Leeds is Professor of Earth System ...

Healing the heart with bone marrow cells

... step in repairing the heart and in preventing the vicious downward spiral of heart failure in which the heart progressively thins and dilates, eventually causing death." Despite advances in surgical procedures, mechanical assistance devices, drug therapy, and organ transplantation, more than half of patient...

A surprise about our body clock

... step in repairing the heart and in preventing the vicious downward spiral of heart failure in which the heart progressively thins and dilates, eventually causing death." Despite advances in surgical procedures, mechanical assistance devices, drug therapy, and organ transplantation, more than half of patient...

Anticipation plays a powerful role in human memory, brain study finds

... to be when it is over. Unfortunately, that sets a vicious cycle in motion, because the stronger her memory of discomfort, the worse her performance anxiety is likely to get. The UW-Madison scientists found that two key regions of the brain - the amygdala and the hippocampus - become activated when a perso...

A cherry on top: Tart cherries may alter heart/diabetes factors

...ct in metabolic syndrome ?and because it feeds the vicious cycle of increased cholesterol and decreased response to insulin that can lead to cardiovascular disease and Type 2 diabetes. Meanwhile, the measure of PPAR messenger RNA in the liver reflects the readiness of the liver tissue to express functiona...

Pesticides choke pathway for nature to produce nitrogen for crops

... applied to legume crops. That practice sets up "a vicious cycle," Fox said, because it reduces a legume crop's natural need for nitrogen fixation but leaves a shortage of natural nitrogen in the soil for the next year's crop to utilize. Thus, she said, there is the need for yet more fertilizer. Other rea...

1