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Tag: "releasing" at biology news

Study shows lizard moms dress their children for success

... recorded the color patterns of the progeny before releasing them into the wild to see how well they survived. To avoid predators, the lizards need a back pattern that matches their behavior. Sneaky yellow-throated males like to hide in the grass and need a barred pattern that breaks up the outline of their...

Researchers develop buckyballs to fight allergy

...the buckyballs are able to prevent mast cells from releasing histamine. Mast cells are responsible for causing allergic response and are packed with granules containing histamine. They are present in nearly all tissues except blood. When mast cells are activated, inflammatory substances such as histamine, ...

Salk scientists hammer out a pathway that promotes muscle cell survival in mice

...f muscle-specific genes in response to exercise by releasing a brake that normally keeps these genes off. Learning how this pathway affects cellular responses may provide clues for improving cellular health in diseases affecting muscle and other cell types. "In addition to muscle, this regulatory circuit i...

An ancient bathtub ring of mammoth fossils

...the Clark Fork River. Sometimes the ice dam broke, releasing huge volumes—up to 500 cubic miles—of water in an instant. The dam would slowly reform creating a new Lake Missoula, and the cycle would repeat. The huge volumes of water swept overland from present-day Spokane to the Tri-Cities, creating a distin...

Implanting dopamine generators in brain cells obtains improvement in Parkinson's in monkeys

...m of respiration and the cardiac frequency through releasing dopamine in situations of low oxygen level in the ...ntrinsic dopaminergic cells and these, in turn, on releasing dopamine, will result in an improvement in the condition of Parkinson's. ...

Researchers wake up viruses inside tumors to image and then destroy cancers

...iral particles are produced, the tumor will burst, releasing the virus. In animal experiments, this experimental therapy, called lytic induction therapy, results in tumor death. As the first step in this study, researchers screened a wide variety of drugs to see if any of them could reawaken the virus. They...

UCSD researchers discover variants of natural tumor suppressor

...nvolved with cell survival. Therapies directed at releasing the brake on this driver would allow cells involved in heart or neurological diseases to better survive. "Both PHLPP variants are important in cancer; the loss of a brake to any of the three Akt pathways sends 'go, go, go' signals that promote th...

Synthetic peptide targets latent papilloma virus infections

...e've only shown that it has a short term effect of releasing the DNA from chromosomes, and this is a long way from curing cells in people." The researchers hope to partner with a biotechnology company to improve the peptide or develop better drug candidates, and ideally to find a formulation that can be take...

Leukemic cells find safe haven in bone marrow

...ow create a protective niche for leukemic cells by releasing large amounts of asparagine, an amino acid that nearby leukemic cells must have to survive but do not make efficiently. This extra supply of asparagine helps leukemic cells survive treatment with asparaginase, a drug that normally would deplete their...

Ultrathin films deliver DNA as possible gene therapy tool

... developed some films that fall apart all at once, releasing all the ingredients simultaneously. More recent designs erode like a bar of soap, with the effect that outer layers are released before inner layers. By placing one gene in the outer layers and another in the inner layers, they can deliver diffe...

Scientists identify a candidate gene for osteoporosis

...eak down bone in a process called bone resorption, releasing important minerals such as calcium, phosphate, and magnesium into the bloodstream. This causes a reduction in BMD. To confirm the involvement of DARC in regulating BMD, Mohan's team characterized the skeletal phenotype of mice with and without ...

Fast-freeze snapshot yields new picture of nerve-muscle junction

...luteraldhyde fixation the nematodes writhe around, releasing neurotransmitters while cells become dehydrated, causing synaptic components to get misplaced and synapses to take on a wrinkly appearance. While slow freezing can create ice crystals that tear cell structures apart, the high-pressure technique, usi...

Siberian lakes burp 'time-bomb' greenhouse gas

Frozen bubbles in Siberian lakes are releasing methane, a greenhouse gas, at rates that appear to be "... five times higher than previously estimated" and acting as a positive feedback to climate warming, said Katey Walter, in a paper published today in the journal Nature. Walter's project is th...

New engineered drug may offer prolonged arthritis relief

...d normally react to IL-1 by growing in numbers and releasing molecules that further activate the immune system. Active IL1RA therefore serves to dampen the immune cells' rate of proliferation, Shamji said. White blood cells treated with the modified drug increased in number at a slower than normal pace, evid...

Critical hearing gene helps send auditory messages to brain

...f neurotransmitter to fuse with the cell membrane, releasing their contents into the space, or synapse, between the sensory cells and auditory nerve endings. That chemical release allows nerve messages to be passed from one neuron to another. In inner hair cells, those neurotransmitter-filled vesicles are he...

'Fruit fly dating game' provides clues to our reproductive prowess

...impact. The Deccan volcanism did the nudging by releasing vast amount of greenhouse gases into the atmosphere over a period of more than a million years leading up tothe mass extinction. By the time Chicxulub struck, the oceans were already 3-4 degrees warmer, even at the bottom, she says. "On land it mus...

Far more than a meteor killed dinos

...impact. The Deccan volcanism did the nudging by releasing vast amount of greenhouse gases into the atmosphere over a period of more than a million years leading up tothe mass extinction. By the time Chicxulub struck, the oceans were already 3-4 degrees warmer, even at the bottom, she says. "On land it mus...

Researchers add to understanding of how brain cells communicate

...a central role. Neurons "talk" to each other by releasing glutamate at a synapse that binds to NMDA receptors on the surface of the "listening" neuron. If the listening neuron is strongly excited, magnesium ions are expelled from the channel of NR1/2A receptors, one NMDA receptor subtype. Calcium ions then ...

Unique soybean lines hold promise for producing allergy-free soybeans

... crop sciences department at the U. of I. "We are releasing this information with no patents so that companies and breeders involved with soybeans can incorporate these two lines as quickly as possible," Hymowitz said. Companies in Japan, Canada and across the United States have been following the research ef...

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

... the release of the stress hormone, corticotrophin releasing factor (CRF), or by blocking the body's CRF recept... CRF, also sometimes referred to as corticotrophin releasing hormone, produces the body's "fight or flight" response under stress and helps kick off a cascade of...

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