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Tag: "responses" at biology news

St. Jude test of bird flu vaccine proves successful

...te quickly and therefore, are slow to avoid immune responses triggered by the vaccine; and H5, a "variable" pro...to mutate readily, thereby foiling previous immune responses it triggered--whether due to natural exposure or vaccination. The other version of the vaccine conta...

Free radical cell death switch identified

...tanding of how oxidative stress elicits biological responses in neurons, and may include besides cell death, neuronal dysfunction and neuronal recovery. Since oxidative stress in neurons and other cells in the body contribute to tissue damage in a variety of disorders, including stroke, ischemic heart disease...

Ozone recovering, but unlikely to stabilize at pre-1980 levels, says study

...vel the nuclear events controlling brassinosteroid responses at the genomic level. This turns our attention to the last mystery: the gap in our understanding of the events between steroid binding at the cell surface and these nuclear mechanisms." ...

Salk scientists untangle steroid hormone signaling in plants

...vel the nuclear events controlling brassinosteroid responses at the genomic level. This turns our attention to the last mystery: the gap in our understanding of the events between steroid binding at the cell surface and these nuclear mechanisms." ...

Researchers discover how bacteria sense their environments

...nment and kick off processes that lead to specific responses within the cell. "Bacteria sense a lot of different things. But assume it's a sugar molecule that a bacterium needs as a nutrient -- even a 0.1 percent change in concentration can be detected, and this sensitivity is maintained over five orders of m...

Stomach receptor for H. pylori discovered

...ely involve alterations in gastric epithelial cell responses that are perturbed within the context of a chronic gastric inflammatory infiltrate, which can persist for decades." A membrane-imbedded protein found in the stomach called decay-accelerating factor (DAF) has been shown to function as a receptor for ...

Robots manipulating animal behaviour

...ially developed algorithms to react to signals and responses from individual insects. This results in a chain action or reaction between the artificial and natural agents ?a two-way interaction that is unique and very promising for sciences such as biology and robotics." Not only did the insbots act like and...

Protein's role in regulating cell death sets direction for cancer research

...rs in the signaling pathways that control cellular responses to different death stimuli. These discoveries suggest that calpain inhibitors might improve the ability of chemotherapeutic drugs or radiation treatment to specifically kill tumour cells in cancer patients. ...

Nanotubes used for first time to send signals to nerve cells

...lectrode next to individual cells and record their responses to electrical pulses transmitted through the SWNTs. In addition to their electrical stimulation experiments, the scientists also studied how different kinds of SWNTs affected the growth and development of neuroblastoma cells. They compared cells pla...

Just like us, social stress prompts hamsters to overeat, gain weight

...onses. "There are a whole suite of physiological responses that occur as a result of stress," Bartness said. ... will take time to unravel all these physiological responses and to use that knowledge to block stress-induced obesity. It may even turn out that the reactions a...

Scientists tie several cancers to common 'oncogene engine'

...AX, that previously has produced rare but dramatic responses in some patients with advanced melanoma. "We have just opened a trial to offer the same vaccine to patients with all of the other cancers in this related family," said Fisher. "Prior to this, virtually no rational experimental treatments were availab...

A sweet solution for Alzheimer's disease?

...ere immunized, St George-Hyslop said. Autoimmune responses shouldn't be a problem with scyllo-inositol. "This compound works by a different mechanism and doesn't involve immunizing a patient with his own protein, which was probably the origin of the allergic reaction to the vaccine," the researcher said. A...

UCSD researchers develop 'smart petri dish'

...s type of sensor could help us predict human liver responses without patient exposure." "Because the Smart Petri Dish gives a continuous readout of cell damage," she adds, "this type of sensor could also be very useful for understanding more about the way environmental toxicants such as water contaminants or...

Researchers unveil strategy for creating actively-programmed anti-cancer molecules

... the ability of antibodies to direct immune system responses to specific tumor types is one of the factors that have led to their increased use. Until recently, it had been widely accepted that while antibodies possess a number of therapeutically advantageous traits, treatment with monoclonals required a d...

Adult stem cell research at UB targets damaged hearts

...egulated tissue can change the myocardial adaptive responses and improve the function of the hibernating myocardium. "My colleagues and I already have carried out initial stem-cell transplantation studies with promising results," said Lee. "Additional studies will be needed to determine whether and how stem...

Dissecting the machinery of nicotine's reward

...estle in the surface of cells and trigger cellular responses when activated by either a natural chemical or an external substance such as nicotine. Researchers studying the structure of nAChRs had found that they comprise many components called subunits that influence the receptors' function. In particular, tw...

Plant protection from cold decoded

.... "From a genetic and molecular standpoint, these responses are all related," Zhu said. "Some of the same genes are involved in all of these responses and understanding how they work can help us develop crops that can better withstand these conditions...

Combination therapy with a monocloncal antibody and a vaccine leads to tumor rejection

...ry T cells (Tregs) act to curb the over-aggressive responses of the T cell population. Researchers continue to work on devising ways to mobilize anti-tumor Teff cells in order to better shape the immune response to tumors. Previously, James Allison and colleagues from Memorial Sloan-Kettering Cancer Center, N...

Wild vs. lab rodent comparison supports hygiene hypothesis

...ental model, which compares specific immune system responses of wild rodents to laboratory rodents, could open ...levels of autoimmune-like and allergic-like immune responses that represent appropriate responses to unknown factors in their environment," he said. Although th...

Time of day tempers tadpoles' response to predators

... normally feed more at night, to see whether their responses to predatory dragonfly larvae differed with time of day. "Green frog tadpoles, like many other aquatic animals, assess predation risk indirectly by sensing chemicals released by their predators into the water," Fraker said. Typically, the tadpoles ...

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