Tag: "uptake" at biology news

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...ng iron from cells. When it is overexpressed, iron uptake increases, causing signal changes in the surrounding environment that can be detected by MRI, without the need to administer an additional substance. As recently described in the journal Nature Medicine, ferritin has so far successfully broadcast ...

Carnegie Mellon scientists find key HIV protein makes cell membranes bend more easily

... change in the shape of gp41, which in turn drives uptake of HIV RNA and proteins by the T cell. But the Carnegie Mellon work suggests that FP-23 plays another, equally important function reducing the free energy of curved fusion intermediates. These fleeting shapes arise and disappear as HIV enters a T ce...

Piecing together the cyanobacteria puzzle

...ts showed that they could image and track nutrient uptake in blue green algae at the nanoscale. The new meth...Fallon and Ian Hutcheon used NanoSIMS to track the uptake and movement of carbon and nitrogen inside two types of cells in the algae: vegetative cells, which ...

Soil particles found to boost prion's capacity to infect

... bound to clay might change the route or degree of uptake of the agent, or that the mineral somehow alters the size of prion aggregates, which have been shown to be more infectious than prions alone. Aiken emphasizes there's still much to learn about routes of prion transmission, and the role of soil is j...

Getting to the root of plant growth

...he roots dictate life or death for a plant through uptake of water and nutrients, and response to environmental factors. The CPIB, which is based at The University of Nottinghams Sutton Bonington Campus, has its official opening on July 2, 2007. Professor Charlie Hodgman, Principal Director of the CPIB,...

Scientists close in on missing carbon sink

...le, "Weak northern and strong tropical land carbon uptake from vertical profiles of atmospheric CO2," was wr... that the models were overestimating the amount of uptake in the north and underestimating uptake in the tropics," says Kevin Gurney of Purdue University, a c...

News tips from the Journal of Neuroscience

...lia and do the heavy lifting in terms of glutamate uptake in the embryonic and adult brain, respectively. The BAC transgene containing the promoter sequence for GLAST encoded the red fluorescent protein Discosoma red, whereas the BAC containing GLT-1 encoded green fluorescent protein. The mice expressed end...

University of Colorado invention may allow thirsty crops to signal farmers

...m can tell a farmer precisely when a plant's water uptake potential is at its peak, which could conceivably decrease the number of watering days for certain crops by up to a day or two each week." Economists estimate that agricultural activity accounts for about 40 percent of the total freshwater use in ...

Cytokine resistance contributes to pathology of type 2 diabetes

...e cascade of events that normally leads to insulin uptake and/or cytokine signaling in a balanced inflammatory response. This study supports earlier findings that inflammation is a key part of the pathology of diabetes, Freund said. Pro-inflammatory cytokines are elevated in type 2 diabetes, but the anti-...

Human activities increasing carbon sequestration in forests

...nt used by a farmer each year - to spur net carbon uptake by forests and actually offset a significant amount of greenhouse gases into the atmosphere. This broad study analyzed the carbon balance across a network of forest sites that represent nitrogen deposition in most of Western Europe and the continen...

Sowing seed on salty ground

...t of our understanding of how plants regulate salt uptake in theirroots may help to eventually find a solution to reducing the impact of soil salinity onagricultural productivity....

UCLA AIDS Institute researchers find a peptide that encourages HIV infection

...his area, at least, agents that enhance retroviral uptake could contribute to an emerging field of medicine." "So many people have tried to deliver genes into different kinds of cells," said study co-author Shen Pang, adjunct associate professor at the UCLA School of Dentistry and a member of the UCLA AI...

'Short-circuit' found in ocean circulation

...inks all the other oceans, and is also relevant to uptake and release of carbon dioxide by the sea transport between the deep and surface waters in the Southern Ocean is particularly important for this process. Understanding oceanic circulation is important because it distributes heat, carbon and nutrie...

Global heartbeat control suggests therapy for beating heart failure

...te a cascade of biological processes including the uptake and processing of energy substrates, the conversion of those substrates into usable forms, the sensing of cellular energy charge, and the use of that energy for contraction, the researchers explained. In their study, the researchers employed a powe...

Scientists: As rainfall changes, tropical plants may acclimate

... the tropics. But it comes with a caveat: Nutrient uptake is only one of many ingredients in plant life. Oth...t will change with precipitation changes nutrient uptake might not affect tropical plants. That said, plenty of others could, Schuur said. ...

TXNIP -- regulator of glucose homeostasis and potential diabetes drug target and more

...etes, and such elevated levels can inhibit glucose uptake in muscle and fat cells. Mootha and colleagues pro...at TXNIP normally regulates and integrates glucose uptake in the periphery of the human body by acting as a glucose- and insulin-sensitive switch, and that th...

New network launches to keep UK at forefront of stem cell science

...contact for overseas researchers and promoting the uptake and use of stem cells by scientific, business and medical communities. Lord Naren Patel of Dunkeld is the first chair of the UKNSCN Steering Committee. He comments: "The UK is one of the world's leading nations for stem cell science but we have to ...

Heart failure: Intervention possibilities from imaging programmed cell loss

...e damaged heart muscle. "We discovered that higher uptake was uptake with a worse outcome. Cell death is one of the biological events that worsens left ventricular event...

Fishing for alternatives

...s of toxins such as cyanide, copper and mercury on uptake into the catfish intestine, says Dr Handy who is organising this session at the SEB Meeting....

Cells selectively absorb short nanotubes

...f toxicity. "Our results demonstrate that cellular uptake in these lung cells depends significantly on the length of the nanotubes," Becker explains. "This is the first of many steps in the critical goal of reducing health risk by de novo engineering of the nanotubes themselves."...

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