Tag: "fate" at biology news

'Biomedical switch' regulates how cells stick together and communicates

...red time-lapse "movies" revealing the mobility and fate of cell adhesions in different environments. Fibrillar adhesions and focal contacts were found to originate together near the cell periphery, and then segregate. While focal contacts generally stay put, fibrillar adhesions are continuously transp...

New link uncovered in nerve cell mechanism thought to power learning and memory

...to flow out of cells. To follow with precision the fate of AMPA receptor subunits, the scientists overexpressed just the GluR1 subunit. AMPA receptors that contain GluR1 but lack GluR2 only allow the inward flow of sodium ions. This property provided Malinow and his colleagues the sensitive electrophysiol...

UC Irvine researchers discover how airborne sea salt particles may influence air pollution levels

...tant in the understanding of the formation and the fate of a number of trace gases vital to global climate issues." In continuing this research, Dabdub will introduce this information on sea salt chlorine creation into a complex computer modeling program that analyzes and predicts the air quality of the S...

Researchers decipher chemical 'cross talk' that determines survival of immunecells

...ts with one from a hormone receptor to control the fate of T cells. This interplay may well determine which kinds of T cells survive, and the process of selection defines the very nature and effectiveness of the arsenal we depend on for life. Jamieson and Yamamoto also wanted to find out if the TCR-trig...

New research animals earn their stripes

...be marked with fluorescent dyes to determine their fate as the embryo increases in complexity. New genes (transgenes) can be injected into the embryos to see their effect on development. Zebrafish can also be studied by mutating the embryo's own genes and observing what effect this has on development. Suc...

Computing the connections between proteins

...nce and doctoral student Tziki Seltzer, took their fate to heart. Working with colleagues at the Biological Chemistry Department, they developed a computer algorithm which calculates the rate at which two proteins associate, using it to fashion proteins with increased affinity - of a hundred times or more...

International conference on heavy metals in the environment

...esentation of research on the origin, behavior and fate of heavy metals. Risk assessment, environmental epidemiology and human health effects have always been core topics at the conference. Major themes of the conference include: --"Top 10" achievements of the 20th century in risk assessment of toxic m...

October Geology and GSA Today highlights

... may be significant in understanding the long-term fate of human input of greenhouse gases. According to these findings, it would take about 170,000 years for carbon dioxide, at its current rate of input, to be removed naturally from the surface biosphere. Extremely fast supercooling of water in the anti...

Driving differentiation of human embryonic stem cells

...types found in the human body. Their developmental fate is influenced by the activity of a number of cellular signals, including growth factors. "Until now, no one had reported extensive and systematic studies on human embryonic stem cells," said Melton, who is at Harvard University. Other research teams ...

NSF-funded scientists to examine environment at the molecular level

...reduction; the molecular mechanismsdetermining the fate and effect of trace metals in the environment; and how metal-based enzymes, important in global nitrogen and carbon cycles, affect marine ecosystems....

Worldwide transfer of microorganism facilitated by ballast water

...robial genetic diversity in ballast water, and the fate of microorganisms discharged from ballast tanks remains unknown. Given the magnitude of ongoing transfer, and its potential consequences for ecological and disease processes, large-scale movement of microorganisms by ships merits attention from both ...

Changes in North American land use have had major impact on global environment

...ve been trying for more than a decade to track the fate of carbon dioxide pumped into the atmosphere as a result of burning fossil fuels. Early studies showed that despite six billion tons of the gas emitted each year, only three or four billion tons accumulate in the atmosphere. Landmark studies from Pri...

Taking the long view: examining factors which influence Northern Spotted Owls

...ny acrimonious battles have been pitched over the fate of land which is simultaneously home to the owls and full of economically valuable timber. But beneath the din of these conflicts, little attention has been paid to other factors which may be influencing the species. Results from a long-term s...

2000 FALL MEETING: updated press conferences, press registration, and other information

...rthquakes some 1,500 years ago may have sealed the fate of two long lost, but recently discovered, sunken and destroyed cities off the present day Mediterranean coast of Egypt. The ruins, under several meters of water and silt and dating to the first millennium, may have been caused by two or three large ...

Losing your head

...s morphogens; they are molecules that specify cell fate in a concentration-dependent manner. Gradients of BMP activity in the embryo determine the body axis. Specific BMP inhibitors, or antagonists, help establish a gradient of decreasing BMP activity along the embryo. For example, the highest level of BM...

Science's Top 10: genome sequencing named top scientific advance of 2000

... injury or disease. In other manipulations of cell fate during 2000, researchers managed to clone pigs, which might provide a source of transplantable organs. Cloning techniques also produced a fetal guar, an endangered animal from India and southeast Asia, raising hopes for rescuing endangered species. ...

Yale researchers find all of the gene targets for a protein

... a muscle cell or a nerve cell. They determine the fate of a cell by "turning on" a particular assortment of genes within the cell and they can control cell proliferation. The transcription factors studied by the Yale team control cell proliferation in yeast. Previously, only a few targets had been identi...

Where does my heart beat now?

...as morphogens; they are proteins that specify cell fate in a concentration-dependent manner. The interplay of these morphogens determines the position of the heart. While bone morphogenetic hormones (BMPs) had previously been identified as agonistic morphogens, the inhibitory morphogen has, until now, r...

Fox Chase Cancer Center researcher publishes new findings on the developmental origin of liver and pancreas

...ivert some of the endoderm cells from a pancreatic fate to a liver fate. The embryonic precursor cells that Dr. Zaret's laboratory studied therefore undergo a choice whereby they can become either the liver or the ventral pancreas, depending on the presence of a signaling factor. The researchers could co...

UCSF studies illuminate possible new landscape for targeting cancer

...y cells - within emerging tumors can influence the fate of tumors, their aggression and their response to therapy. The findings, both reported in recent publications, suggest that blocking the action of these 'innocent' cells - or the factors they release - may interrupt the progression of cancerous tumo...

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