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Tag: "attacking" at biology news

Marine phytoplankton changes form to protect itself from different predators

... large, ball-shaped colonies. When copepods are attacking the phytoplankton, therefore, the best survival st...rganism responds to the chemical signals of what’s attacking it,” Hay said. Experimentally, the researchers attempted to separate the chemical signals from th...

New Brandeis research sheds light on memory by erasing it

...new research shows how synapses can be weakened by attacking memory molecules. Lisman's lab plans further research to better understand what happens to the CaMKII after it is attacked. By using fluorescent forms of CaMKII, it will be possible to determine whether the kinase leaves the synapse after inhibit...

Hives ferment a yeasty brew, attract beetle pest

...y Collapse Disorder, a multitude of things are all attacking bees today, these beetles are just one more thing to add to an already embattled species," says the Penn State researcher. ...

Why doesn't the immune system attack the small intestine?

...l agents such as bacteria, teach T cells to resist attacking healthy intestinal cells." In the new study, Turley and her colleagues found that, in fact, dendritic cells aren't essential in creating tolerance in T cells. Instead, and unexpectedly, tolerance is produced by stromal cells from nearby lymph nodes...

Cancer vaccines -- Taking a jab at cancer by stimulating the immune system

...based, in an effort to coax the immune system into attacking cancerous cells. Today at the 2007 Annual Meeting... the p53 molecule to entice the immune system into attacking tumors." According to the investigators, their vaccine uses three different p53-derived peptides ...

Researchers find hepatitis A and hepatitis C attack same protein to block immune defenses

...by the immune system. Both dodge immune attacks by attacking the same protein ?an essential link in a chain of molecular signals that triggers antiviral responses. "With 30,000-plus proteins in the cell, it’s really remarkable that these two very different viruses have chosen to strike at the same one," sai...

Protein may hold key to decreasing organ dysfunction rates in heart transplants

...finds that Lcn-2 is released by inflammatory cells attacking transplanted hearts in mice, and suggests that the protein is responsible for attracting further inflammatory response. Inflammation was found to decrease dramatically in mice in which the production of Lcn-2 was genetically disabled. The study al...

Bacteria in small sea life yield new way to make potential cancer drugs

...or on the study. "This represents a new way of attacking the problem," Schmidt said. "We're hoping we can use this to find a way to make natural molecules of compounds through single mutations in DNA." To synthesize natural compounds, researchers have traditionally made them in the lab using labor-inten...

'Killer' B cells provide new link in the evolution of immunity

... "When examining fish B cells we see them actively attacking and eating foreign bodies, which is a behavior that, according to the current dogma, just shouldn't happen in B cells," said J. Oriol Sunyer, a professor in Penn Vet's Department of Pathobiology and leader of the research team. The researchers dete...

Virus may control Australia's

...ish in the rivers and creeks. "The virus works by attacking the carp's gills as well as other vital organs and eventually killing its host. Koi herpesvirus is attractive as a biological control agent as overseas studies suggest that it has a very limited host range, infecting only carp. "If the laboratory s...

Hope for a more effective and less toxic cancer drug

... ABT-737 is a drug with a different strategy for attacking cancer. Rather than attempting to poison the rogue cells, the new drug attempts to reactivate the healthy and normal cell death program that failed to kill the unwanted cells on cue. WEHI's leading researcher with the assessment project, Dr David...

Adolescent but not adult hamsters are more aggressive on low dose of fluoxetine

...dose of fluoxetine became generally more peaceful, attacking less often and for shorter times. However, the juveniles responded differently, both to high and low doses. The low doses actually resulted in significantly longer, more frequent and intense attacks, whereas the high dose only partly inhibited aggr...

To elude bats, a moth keeps its hearing in tune

...nsitive to the frequencies that many bats use when attacking moths. Furthermore, the ear remains tuned up in this way for several minutes after the sound stops, ready in case there is another attack. To date, this phenomenon has apparently not been reported for insects, or in fact for any other hearing syst...

'Killer' B cells demonstrate evolutionary link between fish and mammal immune systems

... "When examining fish B cells we see them actively attacking and eating foreign bodies, which is a behavior that, according to the current dogma, just shouldn't happen in B cells," said J. Oriol Sunyer, a professor in Penn Vet's Department of Pathobiology. "I believe it is evidence for a very real connection ...

Tuberculosis: The bacillus takes refuge in adipose cells

...in the lungs may develop some form of tuberculosis attacking the lungs, bones or genitals. It also suggests that isoniazid treatment, prescribed to the close friends and family of patients as a preventative measure, may in some cases not provide sufficient protection against the disease. This is particularly i...

New finding points way to foiling anthrax's tricks

...duce more than one kind of siderophore, apparently attacking on several fronts to get the iron they need. The discovery of a similar strategy in anthrax, Bacillus anthracis, suggests that producing more than one siderophore is a general strategy of bad as well as benign bacteria, according to the researcher...

Fire ant-attacking fly spreading rapidly in Texas

... on strips of flypaper when they take a break from attacking their victims. Researchers place traps around fire...tch. They have found the introduced phorid flies attacking imported fire ants in more than 12 counties and 3.5 million acres in Central Texas and seven countie...

Epstein-Barr virus might kick-start multiple sclerosis

...tion and balance--is a result of the immune system attacking the body's own nervous system. Not everyone who is infected with Epstein-Barr develops MS, but the results of the new study, published in the June 2006, issue of the journal Brain, suggest that some individuals' unusually strong reaction to the virus...

Trials for new drug to overcome HIV

...iling. PA-457 aims to overcome this resistance by attacking HIV on new front. Many existing drugs work by blocking reverse transcriptase, an enzyme that enables HIV to replicate within cell. Others disable protease, which helps to assemble the virus into particles that infect other cells. Recent experiments ...

Immune system police learn early and sometimes badly

...e so they can stop T cells that are predisposed to attacking it, says Dr. Leszek Ignatowicz, MCG immunologist a...lls less skilled at keeping the immune system from attacking their bodies and/or too skilled at protecting invaders. It also means one day physicians might ste...

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